    [From the U.S. Government Printing Office, www.gpo.gov]

                         NORMANOEAU ASSOCIATES INC.

                               "O'll
                         a unit of VA Thermo Water Managementinc.
                                                                          P6

                           The preparation of this document was financed in part by
                           the Coastal Zone Management Act of 1972, as amended,
                           administered by the Office of Ocean and Coastal Resource
                           Management, National Oceanic and Atmospheric Administration
                           through a grant provided by the New Hampshire Office of
                           State Planning.

                                                  PHASE I REPORT:
                                           C
                                              OPOGRAPHICAL SURVEY AND
                                            -T HYDROLOGICAL ANALYSIS

                                                       OF THE

                                                  WALLIS SANDS AND
                                               PHILBRICK BROOK MARSHES

                                                    Submitted to

                                           THE TOWN OF RYE, NEW HAMPSHIRE

                                                     Prepared by

                                             NORMANDEAU ASSOCIATES INC.
                                                    25 Nashua Road
                                             Bedford, New Hampshire 03102

                                                        R-4119

                                                       May 1988

                                                          TABLE OF CONTENTS

                                                                                                   PAGE

                        1.0   INTRODUCTION  . . . . . . . . . . . . . . . . . . . . . .               1

                              1.1  BACKGROUND . . . . . . . . . . . . . . . . . . . ...               1
                              1.2  NEED . . . . . .  * , , * * ,  , , *  * * * *  * * , *  *          1
                              1.3  GOALS OF THE STUDY  . . . . . . . . . . . . . . . . .              3
                              1.4  DESCRIPTION OF STUDY AREAS   . . . . . . . . . . . . .             3

                                   1.4.1 Wallis Sands    . . . . . . . . . . . . . . . .              3
                                   1.4.2 Philbrick Brook   . . . . . . . . . . . . . . .              4

                        2.0   METHODS . . . . . . . . . . . . . . . . . . . . . . . . .               7

                              2.1 EXISTING FEATURES    . . . . . . . . . . . . . . . . .              7
                              2.2 TOPOGRAPHICAL SURVEY   . . . . . . . . . . . . . . . .              7
                              2.3 HYDROLOGICAL ANALYSIS    . . . . . . . . . . . . . . .              8
                              2.4 RESTORATION NEEDS - CONCEPTUAL    . . . . . . . . . . .             9

                        3.0   FINDINGS - WALLIS SANDS MARSH   . . . . . . . . . . . . . .           10

                              3.1 EXISTING DRAINAGE FEATURES    . . . . . . . . . . . . .           10
                              3.2 TOPOGRAPHICAL SURVEY   . . . . . . . . . . . . . . . .            12
                              3.3 HYDROLOGICAL ANALYSIS    . . . . . . . . . . . . . . .            13
                              3.4 WALLIS SANDS RESTORATION NEEDS       CONCEPTUAL   . . . .         20

                        4.0   FINDINGS - PHILBROOK BROOK MARSH    . . . . . . . . . . . .           23

                              4.1 EXISTING DRAINAGE FEATURES    . . . . . . . . . . . . .           23
                              4.2 TOPOGRAPHICAL SURVEY   . . . . . . . . . . . . . . . .            25
                              4.3 HYDROLOGICAL ANALYSIS    . . . . . . . . . . . . . . .            25
                              4.4 PHILBRICK BROOK RESTORATION NEEDS - CONCEPTUAL      . . .         32

                        5.0   LITERATURE CITED  . . . . . . . . . . . . . . . . . . . .             33

                        APPENDIX 1 - TOPOGRAPHIC DATA SUMMARY
                        APPENDIX 2 - STORMWATER RUNOFF AND TIDAL FLOOD SUMMARIES
                        APPENDIX 3 - HYDROLOGIC DATA SUMMARIES

                                                       LIST OF MAPS

                                                                                               PAGE

                       1.   Wallis Sands Study Area  . . . . . . . . . . . . . . . . .            5

                       2.   Philbrick Brook Study Area   . . . . . . . . . . . . . ...            6

                                                      LIST OF FIGURES

                                                                                               PAGE

                       1.   Water Level Measurements - Wallis Sands Marsh:
                            Culvert #5  . . . . . . . . . . . . . . . . . . . . . . .           15

                       2.   Water Level Measurements   - Wallis Sands: Wallis Road
                            Vicinity  . . . . . . . .. . . . . . . . . . . . . . . . .          15

                       3.   Water Level Measurements   - Wallis Sands: Culverts #3A
                            and #3B . . . . . . . . . . . . . . . . . . . . . . . . .           18

                       4.   Water Level Measurements   - Wallis Sands Marsh:
                            Culvert #2  . . . . . . . . . . . . . . . . . . . . . . .           18

                       5.   Water Level Measurements   - Wallis Sands Marsh:
                            Culvert #1  . . . . . . . . . . . . . . . . . . . . . . .           19

                       6.   Water Level Measurements   - Philbrick Brook  Marsh:
                            Culvert #7  . . . . . . . . . . . . . . . . . . . . . . .           28

                       7.   Water Level Measurements   - Philbrick Brook  Marsh:
                            Culvert #8  . . . . . . . . . . . . . . . . . . . . . . .           28

                       8.   Water Level Measurements   - Philbrick Brook  Marsh:
                            Culvert #9  . . . . . . . . . . . . . . . . . . . . . . .           29

                       9.   Water Level Measurements   - Philbrick Brook  Marsh:
                            Culvert #10 . . . . . . . . . . . . . . . . . . . . . . .           29

                       10.  Water Level Measurements   - Philbrook Brook  Marsh:
                            Culvert #11 . . . . . . . . . . . . . . . . . . . . . . .           31

                                                            iv

                     1.0       INTRODUCTION

                     1.1       BACKGROUND

                               The Town of Rye has been directly involved in the-assessment
                     and restoration of its coastal marshes since the New Hampshire Coastal
                     Wetlands Mapping Program completed its Phase 2 report (NAI 1986a)
                     outlining the impacts of development on the town's salt marshes. As a
                     follow-up, wetlands and associated road crossings were investigated for
                     the town's six coastal watersheds (NAI 1986b), with particular regard
                     for drainage problems associated with culvert inadequacies and tidal
                     restriction. These studies, the personal observations of local
                     residents, and previous local studies (Chick 1979, Short 1985, Simpson
                     1986), point out the complex role of development in impeding tidal
                     exchange and freshwater runoff, and salt marsh degradation.

                     1.2       NEED

                               Salt marshes have only recently come to be recognized for
                     their function and value in coastal and estuarine systems. As the
                     result of extensive ecological research and environmental awareness over
                     the last 25 years, a consensus has steadily grown in favor of salt-marsh
                     protection (Nixon 1980). Federal, state, and local legislation has
                     recognized several values associated with salt marshes, including:

                                  0 fisheries

                                  0 pollutant assimilation
                                  * shoreline protection

                                  0 flood control

                                  0 wildlife habitat

                                  0 aesthetic appeal

                                  . education

                                  . scientific research

                                  . recreation

                                Fundamental to many of these functions is the free exchange of
                      tidal waters, via tidal creeks, between marshes and their parent
                      estuary. The exceptional productivity of salt marsh systems is largely
                      attributable to the "energy subsidy" that tides provide. Tides
                      transport nutrients, detritus, and juvenile fish and invertlebrates in
                      and out of marsh creeks, and allow periodic access to the marsh surface
                      by estuarine fish in search of food (Daiber 1986, Nixon 1980). In
                      addition, salt water inundation limits the growth of fresh water plants,
                      while allowing salt marsh species to flourish. Regular tidal flushing
                      allows freshwater to leave the system, thus maintaining sufficient
                      aeration of the soil surface for plant growth (Burdick and Mendelson
                      1987, Cooper 1982, Groeneditk 1984). At the same time, peat
                      accumulation is promoted by saturation of the subsurface layer.

                                .Unfortunately, most coastal development, and particularly the
                      design and construction of roads, bridges, and canals, was well underway
                      or complete by the time the vital link between estuaries and marshes was
                      recognized (Clark 1977). With the level of development in the
                      northeastern United States, most coastal marshes have been impacted to
                      some degree by the effects of surrounding development either directly by
                      filling, or indirectly by the interruption of tidal exchange (Nixon
                      1982). The threats of direct impacts have largely been eliminated by
                      legislation and enforcement at many levels of government. Despite
                      protection, however, many coastal marshes continue to be degraded by the
                      long-term effects of tidal restriction. This degradation is evidenced
                      by large areas of peat deterioration ("rotten spots"), intensified
                      mosquito breeding, and invasion of salt marsh communities by fresh and
                      brackish water plant species. Because of past disturbances, many
                      coastal marshes are now in need of active restoration and management
                      efforts to restore and maintain their vital functioning in estuarine
                      systems (Cowan et al. 1988, Cowan et al. 1986, Roman et al. 1984).

                                                          2

                      1.3        GOALS OF THE STUDY

                                 Normandeau Associates Inc. (NAI) is in the process of
                      completing Phase I of the Topographical Survey and Hydrological Analysis
                      of the Wallis Sands and Philbrick Brook salt marshes in the'Town of Rye,
                      New Hampshire.

                                 The objective of the current study is to provide the physical
                      basis for tidal restoration in two of Rye's salt marshes located in the

                      Wallis Sands and Philbrick Brook watersheds. Phase I is an evaluation

                      of existing conditions in the two study areas, including hydrology,
                      topography and engineering features, and general recommendations for
                      achieving marsh restoration. Phase II, to be completed in mid-June,
                      will recommend specific engineering and drainage improvements to achieve
                      optimal tidal flushing and flood protection. Phase III is scheduled for
                      submission by the end of June 1988, and will assess the impacts of
                      drainage alterations on surrounding development, including properties,
                      septic systems, structures, and roadways.

                                 This report summarizes NAI's work to date on Phase I. Tasks
                      completed or in progress include: 1) a detailed survey of existing
                      drainage features, their location, elevation, condition, and volume
                      exchange capacity;    2) volume study of marshes including creeks,
                      ditches, and marsh   surfaces; 3) tidal exchange determination via water
                      budgeting; and 4)    recommendations for improved tidal exchange for salt

                      marsh restoration.

                      1.4        DESCRIPTION OF STUDY AREAS

                      1.4.1      Wallis Sands

                                 The Wallis Sands salt marsh complex lies landward of Route 1A,
                      across from the Wallis Sands State Beach, and includes approximately

                                                             3

                      185 acres of intertidal marsh, high salt marsh, and brackish tidal
                      marsh. Tidal waters are exchanged at Concord Point, near the south end
                      of the salt marsh system (see Map 1).

                                 The Wallis Sands marshes form a highly complex sy8tem that
                      includes the tidal portions of Massacre Creek and Parson's Creek
                      drainages. The Massacre Creek marsh drains east-wes     t, and joins the
                      Parson's Creek drainage before exiting to the ocean via Concord Point.
                      The Parson's Creek marsh originates at East Rye Pond and extends south,
                      paralleling Route 1A, to the confluence with Massacre Creek. Massacre
                      Creek is generally well-flushed by tides. In contrast., numerous factors
                      restrict tidal exchange in Parson's Creek, and have resulted in
                      degradation of the salt marsh community.

                      1.4.2      Philbrick Brook

                                 The salt marshes of the Philbrick Brook drainage lie south and
                      west of Rye Harbor, and consist of approximately 100 acres of intertidal
                      marsh, high salt marsh, and brackish tidal marsh. Tidal communication
                      with Rye Harbor and the ocean occurs via the channel under the Harbor
                      Road Bridge (see Map 2).

                                 Most of Philbrick Brook marsh occupies the area east of Route
                      1A and immediately south of Rye Harbor, and receives generally good
                      tidal flushing. Two culverts connect this large area with the
                      relatively smaller marshes of Philbrick Brook to the west of Route 1A.
                      Tidal exchange in the Philbrick Brook marshes west of Route 1A is
                      restricted by improperly placed, undersized, and deteriorated culvert     s,
                      and by old stone walls that impede the drainage of water from surface

                      pannes.

                                                            4

                                                     East Rye Pond

                                                  Parson's
                                                    Creek     I
                                                    Marsh

                           6
                                                                                  3-A
                                                                                                 Atlantic Ocean
                                                                                 3-B

                                                                                    Wallis Sands
                                                                       41

                                                                                                    ConcordPoint
                Wallis Sands Watershed
                                                    Massacre Creek
                                                         Marsh.,

                                                     5

                                    Map 1. Wallis Sands Study Area. Points examined for tidal
                                            resrictions are circled and numbered.

                                                               5

                                                                                 Rye Harbor
                                                                     ME
                                                                    I

                                                                    0

                                                               6
                                                            VOW
                              Road

                                                                                                         Locke Is Neck
                                           Philbrick     10
                                        Brook Marsh

                          ,ol

                        Philbrick Brook Watershed                                                       Atlantic Ocean

                                            Ccible Road

                                                                               Jenness Beach

                                       Map 2. Philbrick Brook Study Area. Points examined for tidal
                                               restrictions are circled and numbered.

                                                                    6

                       2.0       METHODS

                       2.1       EXISTING FEATURES

                                 Drainage features of the Wallis Sands and Philbrick Brook
                       marshes were surveyed by aerial photo-interpretation and photogrammetry,
                       coupled with ground-truth surveying and observations. Working maps
                       (1"=200' scale) of each marsh were prepared from recent 1"=1000' aerial
                       black-and-white photographs, to locate major tidal creeks, ponds, and
                       mosquito ditches. Culverts, sluiceways, bridges, and other engineering
                       features were assessed in the field as to location, size, elevation and

                       condition.

                                 Elevations are given relative to National Geodetic Vertical
                       Datum (N.G.V.D.), also referred to as Mean Sea Level (MSL) of 1929.
                       This datum conforms with U.S.G.S. Topographic Mapping and Coast and
                       Geodetic Survey benchmarks, and therefore allows measured water levels
                       to be compared directly with land surface elevations. Tide tables, such
                       as NOAA Tide Tables and those reported in newspapers and fishermens'
                       calendars, generally give elevations relative to local mean low water
                       (MLW). Local MLW is determined at National Ocean Survey (NOS) stations
                       at various locations along the coast. For Rye, the nearest NOS station
                       is at Jaffrey Point on New Castle Island. At Jaffrey Point, local MLW
                       is at -4.14 ft. N.G.V.D., based on measurements during the 19-year tidal
                       epoch that ended in 1959. Tide table elevations can be transposed to
                       USGS Topographic Maps by adding approximately 4.0 ft. Thus, a high tide
                       of 10.0 ft on the tide table can be expected to reach about 6.0 ft
                       N.G.V.D. on local USGS Topographic Maps.

                       2.2       TOPOGRAPHICAL SURVEY

                                 As stipulated in the original RFP, existing 1"=1000' aerial
                       photographs were used to establish topographic contours on each marsh
                       for the purposes of estimating marsh volumes and flood elevations. With

                                                            7

                      photography of this scale, the maximum topographic resolution attainable
                      is a contour interval of five feet. In order to make the most effective
                      use of the existing photography, a contour line was determined for the
                      approximate marsh/upland edge, with additional lines at five feet above
                      and below this elevation. These contours will provide the basis for
                      estimating the volumes of creeks, ponds, ditches, and other water bodies
                      within the marsh basins. Volume estimates are refined by field
                      observations of creek and pond depths, and by field surveying of

                      selected marsh features.

                      2.3       HYDROLOGICAL ANALYSIS

                                The "normal" hydrodynamics of each salt marsh system are being
                      assessed using a water budget approach, which involved direct
                      measurement of volume exchanges during a spring tidal cycle on 16 March
                      1988. Volume exchanges were measured at selected points in each
                      drainage system, with particular regard for likely points of restriction
                      such as road crossings. At each sample location, water level, flow
                      direction, flow velocity, and channel cross-section were measured at
                      regular intervals from the onset of ebb tide, through low tide, and up
                      to subsequent high water approximately 12.5 hours later, Representative
                      points of freshwater input that were non-tidal were also sampled to
                      estimate surface water inflow to each system during the sample period.
                      Salinity and temperature data were collected during the flow survey to
                      corroborate flow data and document water quality indicators of tidal
                      exchange. In evaluating the data, points of tidal restriction were made
                      readily apparent by large differences in water level fluctuation between
                      adjacent basins. For example, if tidal flow were unrestricted, then
                      water levels on either side of a given culvert would be expected to
                      track one another very closely. In contrast, a culvert causing a
                      restriction would result in greatly reduced water level fluctuations at

                      its landward end relative to the seaward end. Points of restriction

                      were targeted for further evaluation by water budgeting. The estimated

                                                          8

                      volume of each marsh basin, coupled with measured inputs, outputs, and
                      water levels, will allow a water budget to be prepared during Phase II
                      of the study for each basin where tidal restriction was observed. Water
                      budgeting involves balancing the measured inputs and outputs from basins
                      of known (estimated) volume, to determine the additional pi@e or channel
                      needed to achieve adequate volume exchange.

                               Stormwater runoff volumes for each marsh basin were modeled

                      using HEC-1 (1985) computer simulation for 10-year, 50-year, and
                      100-year storms. Tidal flood elevations for storm surges were obtained
                      from U.S. Army Corps of Engineers Tidal Flood Profiles (COE 1980).

                      2.4      RESTORATION NEEDS - CONCEPTUAL

                               For Phase I of the study, the primary factors impeding the
                      natural influx of tidal water and drainage of fresh water were
                      identified for each marsh system. General recommendations for
                      improvement are made for each identified factor, with specific
                      recommendations to follow in the Phase II report. The impacts of tidal
                      and stormwater flooding were considered in developing Phase I
                      recommendations. The Phase III report will discuss these impacts in

                      detail.

                                                         9

                      3.0       FINDINGS - WALLIS SANDS MARSH

                      3.1       EXISTING DRAINAGE FEATURES

                                Existing drainage features of the Wallis Sands marshes include
                      the Concord Point outlet, the tidal portions of Parson's and Massacre
                      Creeks, and a network of deteriorated mosquito ditches (Map 1). Points
                      of suspected tidal restriction that were examined for this study are

                      described below.

                                Culvert numbers correspond to those in "Tasks 2 and 3 Final
                      Report - Summary of Field Investigations of Coastal Wetlands and
                      Associated Road Crossings in the Town of Rye, New Hampshire" (NAI
                      1986b). Place names follow Simpson (1986).

                                Concord Point Outlet - This channel provides regular exchange
                      of tidal water for the entire Wallis Sands marsh system. At the Concord
                      Point Bridge the channel measures 39 ft. wide with a bottom profile
                      ranging between 0.96 and 2.91 ft. N.G.V.D. No restriction of tidal flow
                      was observed at the bridge abutment. Minimum water levels in the
                      channel are controlled by bedrock outcrops seaward of the bridge at
                      approximately 2.4 ft. N.G.V.D., or 6.5 ft. above local mean low water
                      (MLW). Previous reports (Simpson 1986, NAI 1986a, NAI 1986b) have
                      indicated that the seaward channel is artificially high due to portions
                      of a sunken barge blocking the natural drainage pathway. The signifi-
                      cance of the channel's present configuration to marsh hydrology will be
                      discussed in Section 3.3. Hydrological Analysis.

                                Culvert #5 - This culvert was the only point along the
                      Massacre Creek drainage that was investigated for tidal restriction. It
                      passes underneath Brackett Road, connecting a small portion of tidal
                      marsh, and the upland Massacre Creek drainage, with the Massacre Creek
                      salt marsh to the east. In general, the Massacre Creek marsh receives

                                                         10

                      good tidal flushing, as evidenced by the relatively lush and even growth
                      of high marsh grasses. Culvert #5 is 30-inch diameter corrugated metal
                      pipe (CMP), approximately 30 ft. long, set at an invert elevation of 3.5
                      ft. (pipe is level). The culvert appears to be in very good condition
                      and, though set a little high, very functional.

                                Wallis Road Vicinity - Parson's Creek  in the vicinity of
                      Wallis Road is an artificially straightened channel varying in width
                      from 10 to 50 ft. (mostly 10-15 ft.) with bottom elevations at approxi-
                      mately 3.6 ft. N.G.V.D. This channel was probably created when portions
                      of the natural creek route were filled, along with surrounding marsh, to
                      allow construction of Route 1A and adjacent development. Where the
                      creek passes under Wallis Road, the channel measures approximately 8.0
                      ft wide and 2.5 ft high. The straightened channel extends from north of

                      Old Wallis Road north to the Horse Paddock. Tidal restriction in this

                      area is severe due to several factors, including inadequate channel
                      size., shallows, and the bed of Old Wallis Road which forms a rocky dam
                      at approximately 3.8 ft.

                                Culverts #3A and #3B - These two culverts connect Parson's
                      Creek with a remnant salt/brackish marsh east of Route 1A about 2.6
                      acres in size. Both culverts are reinforced concrete pipe (RCP) with an
                      internal diameter of 18 inches. The northern pipe, #3A, is approxi-
                      mately 60 feet in length, with invert elevations of 3.28 ft. (west) and
                      3.52 ft. (east). Pipe #3B, to the south, is approximately 70 ft. long
                      with invert elevations of 3.85 ft. (west) and 3.92 ft. (east). Both
                      culverts appear to be in good condition. Culvert #3A feeds directly
                      into Parson's Creek and thus has good placement for carrying tidal water
                      from the creek to the remnant marsh. On the east side of the road,
                      culvert #3A feeds into an open channel and pond system which facilitate
                      free exchange of water through the pipe. In contrast, culvert #3B has
                      indirect and only semi-functional connection to Parson's Creek, with
                      limited potential for transmitting tidal water.

                                Culvert #2 - This culvert connects the northeast section of
                      ParsonIs Creek marsh to a small brackish marsh (about 6.5 acres) that

                      lies north of Marsh Road. The culvert is 18-inch diameter RCP

                      approximately 40 ft. long. Invert elevations are 3.32 ft. at the
                      culvert's south end and 2.72 ft. at its north end. While the culvert is

                      in good condition, the channels it serves are poorly maintained.

                                Culvert #1 - This culvert connects the northwest section of
                      ParsonIs Creek marsh to East Rye Pond which lies north of Marsh Road.
                      The culvert is 18-inch diameter CMP, approximately 40 ft. long, and is
                      functional but showing signs of deterioration at both ends. Invert
                      elevations are 3.95 ft. at the culvert's south end and 4.11 ft. at its

                      north end. Flow in this pipe is non-tidal (unidirectional outflow
                      draining East Rye Pond) except during extreme spring or storm tides.

                      3.2       TOPOGRAPHICAL SURVEY

                                Survey data for Phase I at Wallis Sands included determining
                      culvert elevations, road center-lines, and water levels. Water level
                      staffs, placed at suspected points of restriction, were surveyed to
                      correct water level data relative to N.G.V.D. Representative points
                      surveyed on the high marsh surface were between 4.0 and 5.5 ft, with
                      most elevations in the 4.5 to 5.0 ft range. This is the minimum
                      elevation of flooding during spring tides necessary to achieve salt

                      marsh restoration.

                                The topographical survey of the Wallis Sands marsh will
                      provide the basis for estimating marsh volumes, which will be used to
                      develop specific design criteria for drainage improvements for Phase II,
                      and to determine flood elevations for the impact assessment in Phase
                      III. Ground-truth surveying has been completed, and photogrammetry of
                      existing 1"=1000' aerial photographs is currently in progress.
                      Topographic data are summarized in Appendix 1.

                                                         12

                      3.3       HYDROLOGICAL ANALYSIS

                                Water levels, water quality data, and volume flow data (to be
                      used for Phase II) are given in Appendix 3. Stormwater runoff analyses
                      and tidal flood elevations are given in Appendix 2. Resultt of
                      hydrological analysis of drainage features are discussed in detail

                      below.

                                The graphs presented in this section show water levels taken
                      on 16 March between approximately 10 a.m. (1000 hrs) and 11 p.m. (2300
                      hrs). Each plot shows water levels on the upstream side (inside) and
                      downstream side (outside) of a particular culvert or other suspected
                      point of restriction. In addition, selected plots show water levels for
                      the same period at the main tidal outlet or creek for direct comparison.

                      The reader is advised to note that the vertical scale varies from one

                      graph to another in order to best illustrate local conditions. Direct
                      comparisons between graphs should not be made without taking this into

                      account.

                                Concord Point Outlet - As mentioned earlier, low water levels
                      in the Concord Point channel are controlled by rocky shoals seaward of
                      the Concord Point Bridge. While tidal levels in the ocean regularly
                      fall well below this elevation, resulting in restricted outflow at low
                      tide, this was not found to be the primary factor causing degradation of
                      the salt marsh community. The existing channel is sufficient in cross-
                      section to allow drainage to the level of the shoals, which are approxi-
                      mately 3-4 ft. below the surface of the high marsh. Likewise, during
                      spring (and storm) tides, the Concord Point channel is sufficient to
                      allow flooding of the high marsh surface (ca. 4.5 ft. N.G.V.D.) with
                      incoming seawater (see high tide elevations at Concord Point and Culvert
                      # 5 in Figure 1). The Massacre Creek marsh is a good indication of the
                      adequacy of the Concord Point outlet where, in the absence of internal
                      flow restrictions, the marsh is healthy and well-drained. The present
                      configuration of the outlet is the result of partial removal of the

                                                         13

                      barge in 1985 (Simpson 1986). Complete removal of the barge would
                      greatly improve drainage in Massacre Creek, and the lower part of
                      Parson's Creek marsh. However, restoration of the upper Parson's Creek
                      marsh depends primarily upon the removal of restrictions along Parson's
                      Creek, discussed in detail below.

                                Culvert #5 - This culvert links the majority of the salt marsh
                      east of Brackett Road with a 1.0 acre salt marsh, grading into fresh
                      marsh and swamp to the west. Figure I shows the results of water level
                      measurements taken at both ends of Culvert #5 on 16 March. Water levels
                      correspond closely, except at low tide, when the seaward water level
                      (Level Outside) dropped below the pipe's invert elevation, resulting in
                      a hydraulic drop. While this indicates that the pipe is set higher than
                      would be ideal, the minor restriction of outflow is not adversely
                      affecting the salt marsh community because freshwater retention is low
                      and high tide flooding is unrestricted.

                                Wallis Road Vicinity - Water levels were monitored in the
                      vicinity of Wallis Road at three stations: 1) Wallis South, located in
                      a wide portion of the channel roughly 400 ft. south of Wallis Road; 2)
                      Wallis Road at the bridge over the creek; and 3) Wallis North, located
                      near the Horse Paddock roughly 350 ft. north of Wallis Road. Water
                      level data indicate continuous restriction of flow along this channel
                      due to inadequate channel dimensions (Figure 2). Debris clogging the
                      channel further restricts flow. Tidal amplitudes for the three stations

                      are as follows:

                                  Station                 Tidal Amplitude (Ft.)

                                Wallis South                     0.90

                                Wallis Road                      0.74

                                Wallis North                     0.40

                      Thus, over a distance of less than 800 feet, the already narrow tidal
                      range at Wallis South (0.90 ft.) is reduced by more than 50 percent.

                                                         14

                                                                  FIGURE 1
                                                         WALLIS SANDS MARSH: CULVERT #5

                            5.6

                            5.4

                            5.2
                    >         5
                    z
                    La

                    0       4.6 -

                            4.4

                            4.2 -

                    61        4-
                    L
                            3*1 -                                    E3
                    III                                              I
                    C1
                    F-

                            3.4-

                            3
                              2
                              .3

                            2.8

                               09:36                        14:24                         19:12                        00:00

                                                                TIME (HOURS OF DAY)
                   0    LEVEL INSIDE                       +    LEVEL OUTSIDE                              CONCORD PT.

                                                                  FIGURE 2

                                                        WALLIS SANDS: WALLIS ROAD V`ICINITY
                              6 -

                            5.8

                            5.6

                            5.4

                            5.2 -

                              5
                    z       4.8

                    0       4.6

                            4.4-
                    t
                            4.2 -
                    -A
                    LLI       4-

                            3.8 -

                            3.6 -
                    F:
                            3.4-

                            3.2 -

                              3

                            2.8
                               09:35                        14:24                         19:12                        00:00

                                                                TIME (HOURS OF DAY)
                                                  Wallis Bridge + Wallis North OWallis South L Concord Point

                                                                         15

                                The inadequacy of the tidal creek in this vicinity is
                      compounded by the remnants of the Old Wallis Road roadbed about 300 ft.
                      south of the Wallis South staff. Large stones blocking the creek
                      channel at this point effectively form a dam, the overflow elevation of
                      which is approximately 3.8 ft. Outflow is severely restric@ted at this
                      point, with water levels below the dam having several times the
                      amplitude observed above the dam. Though no water level staff was
                      placed directly below the dam, the low tide water level was observed to
                      drop approximately 1.5 ft. below dam level, or to approximately 2.3 ft.
                      N.G.V.D., on 16 March. The Old Wallis Road roadbed is the single most
                      restricting feature along Parson's Creek.

                                Further restriction of flow occurs north of Wallis Road in the
                      vicinity of the Horse Paddock and "trash corner" (Simpson 1986), where a
                      sharp bend in the channel is eroding fill along the bank of an abutter's
                      property. Bank stabilization attempts are evident in the form of
                      boards, cable, and other debris, but are apparently only partially
                      effective. Trash corner is located on the outside curve of a sharp bend
                      and strong currents, especially during outflow, undermine stabilization

                      attempts.

                                Finally, shallows in the immediate vicinity of Wallis Road

                      cause flow restriction. Bottom elevations at stations north and south

                      of Wallis Road are 0.5 to 1.0 ft below the invert elevation of 3.6 ft

                      N.G.V.D. at the Wallis Road bridge. These depth changes slow both

                      inflow and outflow.

                                Culverts #3A and #3B - Tidal flow between Parson's Creek and
                      the remnant marsh is restricted by undersized pipes and an insufficient
                      channel linking culvert #3B to the creek. Tidal fluctuation in this
                      section of Parson's Creek is minimal - measurements during the sample
                      period had an amplitude of 0.30 ft. at the west end of culvert #3A. In
                      the remnant marsh east of Route 1A, water levels fluctuated 0.12 ft. at

                                                         16

                      culvert #3A and 0.10 ft. at culvert #3B (Figure 3). Most of the volume
                      exchange between Parson's Creek and the remnant marsh occurred via
                      culvert #3A (see Appendix 3). The superior functioning of culvert #3A
                      results from its direct connection from Parson's Creek to open water in
                      the remnant marsh. In contrast, culvert #3B connects to Mrson's Creek
                      via approximately 160 ft. of narrow ditch that results in flow

                      restriction.

                                Culvert #2 - Although this culvert is in good condition and
                      functional, very little flow was observed during the survey period.
                      Water levels on either end of the culvert remained nearly constant, and
                      essentially equal (Figure 4). Tidal flow in and out of the small
                      brackish marsh north of Marsh Road is restricted mainly by the lack of a
                      functional channel between culvert #2 and Parson's Creek. Flow between
                      the creek and the culvert must pass through dense vegetation and shallow
                      ditches, and thus shows little response to tide levels. The culvert
                      itself readily equalizes changes in water level, which are due mainly to
                      freshwater streamflow and runoff from the north. Water levels in this
                      vicinity were 0.3-0.5 ft. above levels in Parson's Creek due to flow

                      restriction between the culvert and the creek.

                                Culvert #1 - This culvert is essentially beyond the reach of
                      regular tidal fluctuation for two reasons. Tidal inflow via Parson's
                      Creek is restricted by artificial obstructions (previously discussed),
                      and by the creek's natural configuration. In addition, the small size
                      of culvert #1 restricts freshwater outflow, resulting in a freshwater/
                      brackish pond (East Rye Pond) that drains continuously into the marsh.
                      Outflow from East Rye Pond was continuous during the sample period, and
                      the water levels inside the pond remained essentially constant (Figure
                      5). South of the culvert, water levels showed a minor response to tide
                      levels (amplitude = 0.09 ft.), but not enough to reverse flow.

                                                         17

                                                                   FIGURE 3
                                                        WALLIS SANDS: CULVERTS f3AAND f38

                            4.9 -

                            4.8 -

                            4.7 -

                    z
                    Ld      4.6 -

                            4.5

                            4.4-
                    LLL
                    L
                    tLL     4.3 -
                    CL

                            4.2-

                            4.1 -

                               4-
                               12:00             14:24             16:48              19:12             21:36             00:00

                                                                 TIME (HOURS OF nAY)
                        0     3A INSIDE                    +    38 INSIDE                          PARSONS GREEK

                                                                   FIGURE 4-
                                                          WALLIS SANDS MARSH: CULVERT f2
                              5 -

                            4.9 -

                            4.8

                            4.7 -

                            4.6 -

                    F:

                            4.5 -

                            4.4
                               12:00             14:24             16:48              19:12             21:36             00:00

                                                                 TIME (HOURS OF DAY)
                          E3   LE\4=-L IN                      LEVE L OU T                        PARSONS GREEK

     A                                                                     18

                                                             FIGURE 5
                                                     WALLIS SANDS MARSH: CULVERT #1

                             5   a     s            a

                           4.9

                  ul
                  >

                  Ll
                  L

                  Ld
                  cl
                  F:

                             12:00           14:24            16:48           19:12            21:36           00:00

                                                           TIME (HOURS OF DAY)
                        C3   LEVEL IN                +    LEVEL OUT                      PARSONS GREEK

                                                                    19

                      3.4       WALLIS SANDS RESTORATION NEEDS - CONCEPTUAL

                                Existing impediments to tidal flows in the Wallis Sands
                      marshes result almost exclusively from recent and historical road
                      crossings on the marsh. Tidal flow is restricted when the tidal head in
                      the channel exceeds the capacity of the culverts installed, or when
                      culverts are set above grade, resulting in a hydraulic jump. During
                      spring tides, which flood the high marsh surface, tidal restriction is
                      made worse by the diking effect of the roadbed. Sheet flow across the
                      marsh surface is thus blocked, and the additional water must be able to
                      pass through the culvert to ensure normal flooding of the marsh landward
                      of the pipe (Clark 1977). Roadbeds also restrict subsurface flow by
                      compacting marsh peat. While generally very minor, this can result in
                      impeded drainage and percolation of surface water (Hemond et al. 1984).

                                Recommended drainage improvements to increase tidal circula-

                      tion in the Wallis Sands marsh focus on the removal of obstructions
                      along the main channel of Parson's Creek in the vicinity of Wallis Road.
                      Second in priority is improvement of the tidal channel at Concord Point,
                      although this may not be an option for reasons discussed in Simpson
                      (1986). Improvements to culverts and ditches that connect Parson's
                      Creek to small marshes isolated by road crossings are also recommended.
                      Though less critical to the overall restoration process, improved
                      drainage of the small peripheral marshes will increase stormwater runoff
                      capacity during flood events.

                                These recommendations are conceptual, and generally follow the
                      findings of "Tasks 2 and 3 Final Report - Summary of Field Investiga-
                      tions of Coastal Wetlands and Associated Road Crossings in the Town of
                      Rye, New Hampshire" (NAI 1986b). These recommendations are based on
                      detailed investigations of site-specific hydrology and topography, and
                      will be followed by specific design recommendations in the Phase II

                      report.

                                                         20

                                Parson's Creek - Removal of obstructions and channel

                      enlargement are recommended from the Old Wallis Road roadbed north to
                      the vicinity of the Horse Paddock. Highest priority should be given to
                      the Old Wallis Road roadbed, which should be removed from the creek,
                      with the channel improved to conform with surrounding dimensions.
                      Shallows in the vicinity of Wallis Road are also recommended for
                      dredging to an elevation of approximately 2.5 ft. N.G.V.D. (1.0 ft.
                      below existing grade). Reconfiguration of the channel at the sharp bend
                      south of the Horse Paddock, known as trash corner, is recommended to
                      increase flow and alleviate channel erosion problems. Channel
                      reconfiguration alternatives may include widening the existing channel
                      and stabilizing the creekbank, or straightening the channel by
                      relocating it further west. The exact extent of recommended channel
                      modifications in the vicinity of Wallis Road will be determined during
                      Phase II of the study, in consultation with Town officials.

                                Concord Point Outlet - Restoration of the Concord Point outlet

                      channel to pre-barge dimensions is recommended for improving tidal
                      flushing of the marsh. The political and biological aspects of this
                      action are discussed at length in Simpson (1986). Detailed review of
                      the engineering of the dredging project is beyond the scope of this
                      study.

                                Culverts #3A and #3B - Replacement of culvert #3A with a
                      drainage structure of roughly twice the capacity, and improvement of
                      drainage ditches at both ends of culvert #3B are recommended. Self-
                      regulating tide gates are recommended to reduce the hazard of storm
                      surge flooding. These structures are designed to allow free passage of
                      tidal waters during normal tidal cycles. During extreme flood tides, a
                      one-way valve closes over the culvert mouth, thus preventing inflow
                      beyond flood levels. At low tide the valve allows free outflow to drain
                      flood waters, and can be reset manually to allow free-flow (T. Steinke,
                      Town of Fairfield, CT, Conservation Commission, personal communication).

                                                         21

                                Culvert #2 - Improvement of drainage ditches and channels
                      South of culvert #2 is recommended. A self-regulating tide gate, to
                      protect against flooding due to tidal storm surge, is recommended for
                      installation at the south end of the pipe.

                                Culvert #1 - Previous reports have noted that the East Rye
                      Pond area was formerly a high salt marsh community (Simpson 1986, NAI
                      1986b), that has gradually been converted to a brackish pond by
                      freshwater retention and tidal restriction. Although the present
                      ecological community is artificial in this respect, locally it is
                      relatively rare compared with salt marsh. East Rye Pond provides  open
                      water habitat for waterfowl, as well as providing additional habitat
                      diversity for wetland-dependent wildlife. In addition, the pond adds
                      aesthetic value to the area. Complete tidal restoration of East Rye
                      Pond would result in loss of the brackish pond community and its
                      associated values. Therefore, we recommend that East Rye Pond be
                      maintained as a brackish pond, with drainage improvements made to reduce
                      flooding due to stormwater runoff.

                                Replacement of the existing culvert with larger capacity
                      drainage structures is recommended to improve stormwater runoff.
                      Replacement structures can be set at the approximate elevation of the
                      existing culvert to maintain open water in East Rye Pond, while allowing
                      for rapid passage of overflow during storm events. The low elevation of
                      Marsh Road in this vicinity limits drainage and flood control options,
                      and will be a consideration in designing specific recommendations in

                      Phase II.

                                Culvert #5 - There is no immediate need to replace this
                      culvert for tidal restoration purposes. In the normal course of
                      maintenance, it is recommended that a replacement structure of similar
                      size be set approximately 0.5 ft. below the invert of the existing

                      culvert.

                                                         22

                      4.0       RESULTS - PHILBRICK BROOK MARSH

                      4.1       EXISTING DRAINAGE FEATURES

                                Existing drainage features of the Philbrick Brook marsh
                      include the Rye Harbor outlet, an expansive network of tidal channels
                      and mosquito ditches, and several drainage structures under road
                      crossings (Map 2). Points of suspected tidal restriction that were
                      examined for this study are described below. Elevations are given
                      relative to N.G.V.D., as discussed in Section 3.1.

                                RVe Ha rbor Outlet - This channel provides tidal exchange for
                      the entire Philbrick Brook marsh system. At the Harbor Road Bridge, the
                      channel measures 19 ft. wide with a rocky, irregular bottom. Measure-
                      ments of bottom elevations ranged between -2.40 ft. and -0.60 ft. Minor
                      restriction of flow was observed at the bridge abutment, which appears
                      to be in very good condition. Minimum water levels in the channel are
                      controlled by stony-gravelly shoals seaward of the bridge at approxi-
                      mately -1.5 ft., or 2.6 ft. above MLW.

                                Culvert #7 - This culvert connects the main portion of the
                      tidal marsh with a semi-isolated marsh west of Route 1A just south of
                      the Harbor Road junction. The pipe is 24-inch diameter CMP in good
                      condition, set at invert elevations of -0.44 ft. (east) and -0.57 ft.
                      (west). The network of ditches west of this pipe is showing signs of
                      slumping and deterioration, as described in NAI (1986b).

                                Culvert #8 - This drainage structure is a sluiceway con-
                      structed of granite blocks that passes under Route 1A approximately 850
                      ft. south of culvert #7. The granite sides of the sluiceway appear to
                      be in good condition, however, the overlying concrete slab is severely
                      deteriorated particularly at the east end. The channel measures approx-
                      imately 40 inches wide, with a rocky, irregular bottom at about 2.37 ft.
                      The bottom is elevated at this point relative to the Rye Harbor outlet

                                                         23

                      due to rocky shoals about 200 ft. downstream of the sluiceway. These
                      rocks may be mostly of natural origin, but many appear to have spilled
                      over the embankment during the filling of adjacent marsh for con-
                      struction of a hotel. This channel is the primary drainage for

                      Philbrick Brook marshes west of Route 1A.

                                Several old stone walls criss-cross the marsh surface upstream
                      of culverts #7 and #8. The remnants of salt marsh pasturing practices,
                      these walls have sunken several feet into the marsh peat. Although they
                      do not directly interfere with tidal exchange in the main drainage
                      channels, their deleterious effect on surface water drainage and
                      infiltration is apparent. They will be discussed further in Section
                      4.3, Hydrological Analysis.

                                Culvert 9 - This 36-inch CMP hydraulically connects salt
                      marshes on either side of Locke Road, and is situated upstream of
                      culvert #8 in the primary Philbrick Brook drainage. The pipe, though
                      set too high, appears to be in very good condition with invert eleva-
                      tions of 2.39 ft. (north) and 2.87 ft. (south). The pipe is set in a
                      granite stone abutment.

                                Culvert #10 - This 30-inch CMP passes under a private drive
                      just south of culvert #9 along the main Philbrick Brook channel. Invert
                      elevations are 2.98 ft. (north) and 2.97 ft. (south). The pipe appears
                      to be in very good condition.

                                Culvert #11 - This culvert is located south of the junction of
                      Locke Road and Route 1A, and north of the junction of Atlantic Avenue

                      and Route 1A. This culvert connects the main branch of Philbrick Brook
                      salt marsh to a small, isolated brackish marsh (ca. 4.2 acres) east of
                      Route 1A. The culvert is 18-inch diameter CMP that is corroded,
                      partially collapsed, and partially clogged with sediment. Invert
                      elevations are 4.37 ft. (west) and 4.22 ft. (east). The west invert is
                      set well above the tidal channel, thus limiting tidal flooding. The

                                                         24

                      pipe's deteriorated condition and high elevation also restrict outflow

                      from the isolated marsh.

                      4.2       TOPOGRAPHICAL SURVEY

                                As with the Wallis Sands marsh, survey data for Phase I at
                      Philbrick Brook included determining culvert elevations, road center-
                      lines, and water levels. Water level staffs, placed at suspected points
                      of restriction, were surveyed to correct water level data relative to

                      N.G.V.D.

                                The topographical survey of the Philbrick Brook marsh will
                      provide the basis for estimating marsh volumes, which will be used to
                      develop specific design criteria for drainage improvements for Phase II,
                      and to determine flood elevations for the impact assessment in Phase
                      III. Ground-truth surveying has been completed, and photogrammetry of
                      existing 1"=1000' aerial photographs is currently in progress.
                      Topographic and photogrammetric work completed or in progress is sum-
                      marized in Appendix 1.

                      4.3       HYDROLOGICAL ANALYSIS

                                A conspicuous feature of the Philbrick Brook marshes are the
                      large tide pools, or pannes, that occupy the marsh surface. These areas
                      are shallow, unvegetated pools that retain flood and rainwater, and dry
                      out during dry periods. Pannes are a natural feature of New England
                      high salt marshes, and their origin and ecology are only partly under-
                      stood. While their distribution relates to poor surface drainage, they
                      do not necessarily indicate an unhealthy marsh, and in fact may increase
                      a marsh's value for water-dependent wildlife. For this study, pannes
                      were considered "negative" features when their origin was obviously the

                                                         25

                     result of human disturbances. In such cases, recommendations will be
                     made for drainage improvements in the following section. If desirable,
                     natural pannes, or those of questionable origin, may be managed using
                     methods similar to those we recommend for disturbed areas.

                               Hydrological analysis of the Philbrick Brook marsh is based on
                     a 14-hour sampling period on 16 March 1988, as outlined in Section 3.3.
                     Sampling data are presented in Appendix 3. Stormwater runoff analyses
                     and tidal flood elevations are given in Appendix 2. Results of the
                     analysis are discussed in detail below.

                               Rye Harbor Outlet - Low water  levels at the Rye Harbor outlet
                     are controlled by rocky-gravelly shoals  seaward of the Harbor Road
                     Bridge at approximately -1.5 ft., or 2.6 ft.'above local MLW. Although
                     tide levels in the ocean regularly fall below this level, the channel's
                     present configuration was not found to be restricting tidal flushing of
                     the marsh system. Water levels at the bridge are shown in Figures 6 and
                     7. The tidal amplitude observed at this station on 16 March was 7.45
                     ft. Tidal channels upstream of the bridge drained to near-minimum
                     levels during low tide, indicating adequate drainage. Similarly, high
                     tide levels were adequate to flood the marsh surface.

                               Despite good drainage in the main tidal channel, large areas
                     of the marsh surface show evidence of poor drainage. Broad pannes have

                     formed behind old stone walls that criss-cross the marsh in several

                     places. These walls act as dams, preventing drainage of surface water.
                     In addition, the walls compact the underlying peat layer, thus impeding
                     infiltration and subsurface flow. Water from tidal flooding and
                     rainfall remains ponded on the marsh surface for excessive periods,
                     resulting in vegetation die-off, breakdown of the peat, and erosion.
                     Large panne areas are especially prevalent in the southern half of the
                     marsh south of Rye Harbor.

                                                        26

                                 Culvert #7 - Water levels measured at culvert #7 are shown in
                      Figure 6. Close tracking of water levels on both sides of the pipe
                      indicate that there is no restriction of flow through the existing
                      channel. The marsh area west of Culvert #7 suffers from the effects of
                      old stone walls and poor infiltration as described above. Unvegetated
                      pannes have formed behind old walls, and peat slumping and erosion are
                      prevalent.

                                 Culvert #8 - Water levels from 16 March indicate good tidal
                      flooding through the granite sluiceway. Minor restriction of outflow,
                      shown in Figure 7, is caused by a higher bottom elevation at the
                      sluiceway's landward end. Figure 7 also shows water levels at the Rye
                      Harbor outlet, which drop several feet below culvert #8 at low tide.
                      This is the result of the increasing elevation of the channel east of
                      culvert #8. Whether this shoaling is of natural origin or the result of
                      fill is not known at this time. Nonetheless, channel elevations are
                      sufficiently low to permit adequate drainage during outflow.

                                 The marsh between culverts #8 and #9 is criss-crossed with old
                      stone walls which, as discussed in the previous paragraphs, result in
                      prolonged surface ponding. Large areas have been flooded and remain
                      unvegetated. The surface peat layer has deteriorated and eroded, and in
                      many spots has broken through to form deep holes. Remnant walls
                      parallel both sides of the creek in this area, and others occur between
                      the creek and the upland edge.

                                 Culvert #9 - This culvert was found to restrict outflow due to
                      improper placement. Figure 8 shows water levels on both sides of the
                      pipe during sampling on 16 March. The pipe's size is sufficient to
                      allow flood tides to enter the marsh, but does not allow adequate
                      drainage because it is set above the grade of the creek bed. Low tide
                      water levels on the upstream side of the pipe remained approximately 1.0
                      ft. higher than the downstream side. Elevated water levels prevent peat

                                                          27

                                                             FIGURE 6
                                                   PHILBRICK BROOK MARSH: CULVERT #7

                             5
                    ci

                             4-
                    z

                             3 -

                             2

                    A
                    La
                    cl
                    P        0

                           -2                                                            T
                             07:12                  12:00                   16:48                  21:36

                                                           TIME (HOURS OF DAY)
                    0   LEVEL IN                     LEVEL OUT                      RYE HARBOR BRIDGE

                                                             FIGURE 7
                                                   PHILBRICK BROOK MARSH: CULVERT #13

                             6

                             5

                             4-
                    z

                    0        3 -

                             2

                    Ll

                    Li
                    a
                    P        0

                           -1

                           -2
                             07:12                  12:00                   16:48                  21:36

                                                           TIME (HOURS OF DAY)
                    13  LEVEL IN                +    LEVEL OUT                      9YE HARBOR BRIDGE

                                                                    28

                                                                   FIGURE 8
                                                        PHILERICK BROOK MARSH: CULVERT #9

                            5.5

                            5.4-

                            5.2 -

                               5

                            4.E
                    z
                    >       4.6
                    0
                            4.4-

                            4.2 -

                               4-
                    La
                    L       3.8 -
                      L
                    LL
                    cl      3.6 -

                            3.4-

                            3.2 -

                               3

                            2.8

                               09.36                         14:24                           19:12                        00.00

                                                                 TIME (HOURS OF OAY)
                                                 13    LEVEL IN                  +    LEVEL OUT

                                                                   FIGURE 9
                                                        PHIL13RICK BROOK MARSH: CULVERT #10
                            5.5 -

                            5.4 -

                            5.3 -

                            5.2 -

                            5.1

                               5

                            4.9
                    z       4.9
                    tLi
                    >       4.7
                    0
                            4.6

                            4.5

                            4.4-
                    LL      4.3 -

                            4.2 -
                    Ll
                    ia      4.1
                    F          4

                            3.9

                            3.8

                            3.7

                            3.6
                               09:36                         14:24                           19:12                        00:00

                                                                 TIME (HOURS OF DAY)
                                                 0    LEVEL IN                   +    LEVEL OUT

                                                                            29

                     drainage, resulting in water-logging and vegetation die-off. The
                     effects of outflow restriction can best be seen in the marsh area
                     upstream of culvert #10, where the peat surface is deteriorating and
                     pannes are forming.

                               Culvert #10 - Figure 9 illustrates relatively free exchange of
                     tidal flow through culvert #10. This culvert is slightly undersized for
                     the channel it serves, and minor restriction of outflow was observed
                     during the sample period. Outflow water levels were elevated approxi-
                     mately 0.1 ft. upstream of the pipe compared with downstream levels.

                               Culvert #11 - This culvert severely restricts tidal exchange

                     between the brackish marsh east of Route 1A and Philbrick Brook. Water

                     levels on both sides of the culvert are shown in Figure 10. At the end
                     of the flood tide period, water levels in Philbrick Brook measured 0.1
                     ft. higher than in the isolated marsh, indicating moderately restricted
                     flow. Severe restriction of outflow is caused by the pipe's high
                     setting and deteriorated condition, and resulted in water levels in the
                     brackish marsh being elevated by approximately 0.7 ft. during low tide.

                                                        30

                                                   FIGURE 10
                                           PHILBROOK BROOK MARSH: CULVERT #11

                      5.3-

                      5*2-

                      5.1
                2E       5

                0

                      4.7-

                      4.6-
                LLL
                      4.5

                Ld    4.4-

                P     4.3 -

                      4.2-

                      4.1-

                         4-

                      3.9
                         09:36                  14:24                  19:12                  00:00
                                          LEWL IN TIME (HOURS OF+DAY) LEWL OUT

                                                          31

                      4.4       PHILBRICK BROOK RESTORATION NEEDS - CONCEPTUAL

                                Rye Harbor Outlet - Maintain channel in present configuration
                      or larger. In marsh areas that have been cut-off by old stone walls,
                      extend ditches from tidal creeks into panneareas to restore natural
                      drainage and encourage revegetation.

                                Culvert #7 - Maintain present culvert and creek channel.
                      Improve and extend creek and ditches to the west, cutting through old
                      stone walls to restore natural drainage of surface water and encourage
                      revegetation.

                                Culvert #8 - Repair deteriorating sluiceway, especially at
                      east end where collapse is imminent and potentially hazardous. Breach
                      old stone walls on both sides of the creek upstream of culvert #8.
                      Extend ditches through breached walls to restore natural drainage and
                      encourage revegetation.

                                Culvert #9 - Replace existing culvert with drainage structure
                      of similar capacity set approximately 1.0 ft. below the present invert
                      elevation to improve outflow and maintain inflow capability.

                                Culvert #10 - Replace existing structure with slightly larger
                      structure set at present elevation.

                                Culvert #11 - Replace existing culvert with larger capacity
                      pipe set approximately 1.5 ft. below the present invert elevation to
                      improve outflow and inflow capacity. Install a self-regulating tide
                      gate on the pipe's western end to protect against flooding due to tidal

                      storm surge.

                                                        32

                     5.0 LITERATURE CITED

                     Burdick, D.M. and I.A. Mendelson. 1987. Waterlogging responses in
                          dune, swale, and marsh populations of Spartina patens under field
                          conditions. Oecologia 74(3):321-329.

                     Chick, B.E. 1979. A report detailing the Rye salt marsh management
                          pilot study for mosquito prevention and marsh rejuvenation. Rye
                          [N.H.] Mosquito Control District Report.

                     Clark, J.R. 1977. Coastal Ecosystem Management. A technical manual
                          for the conservation of coastal zone resources. The Conservation
                          Foundation. John Wiley and Sons, New York. 928 pp.

                     COE.  1980. New England Coastline Tidal Flood Survey. U.S. Army Corps
                          of Engineers, Waltham, MA.

                     Cooper, A. 1982. The effects of salinity and waterlogging on the
                          growth and cation uptake of salt marsh plants. New Phytologist
                          90:263-275.

                     Cowan, D.P., T. Hruby, T.S. Litwin, and R.A. Lent. 1987. Long Island
                          Region tidal wetlands planning manual. Part I: Site Inventory.
                          Cornell University Laboratory of Ornithology, Seatuck Research
                          Program Technical Report. Seatuck Research Program, P.O. Box 31,
                          Islip, N.Y. 60 pp.

                     Cowan, D.P., T. Hruby, T.S. Litwin, and R.A. Lent. 1986. Open marsh
                          water management on Great South Bay, Islip, New York. Baseline
                          study: 1984-1985. Cornell Laboratory of Ornithology, Seatuck
                          Research Program Technical Report. Seatuck Research Program, P.O.
                          Box 31, Islip, N.Y. 101 pp.

                     Daiber, F.C. 1986. Conservation   of tidal marshes. Van Nostrand
                          Reinhold, New York. 341 pp.

                     Groeneditk, A.M. 1984. Tidal Management: Consequences for the salt
                          marsh vegetation. Water Science and Technology. 16:79-86.

                     HEC-1. 1985. Flood hydrographic package (IBM XT 512K version). U.S.
                          Army Corps of Engineers, The Hydrologic Engineering Center, Davis,
                          CA.

                     Hemond, H.F., W.K. Nuttle, R.W. Burke, and K.D. Stolzenback. 1984.
                          Surface infiltration in salt marshes: Theory, Measurement, and
                          Biogeochemical Implications. Water Resources Research.
                          20:591-600.

                     Nixon, S.W. 1982. The ecology of New England high salt marshes: a
                          community profile. U.S. Fish and Wildlife Service, Office of
                          Biological Services, Washington, D.C. FWS/OBS-81/55. 70 pp.

                                                        33

                     Nixon, S.W. 1980. Between coastal marshes and coastal waters - a
                          review of twenty years of speculation and research on the role of
                          salt marshes in estuarine productivity and water chemistry. Pages
                          437-525 In P. Hamilton and K.B. MacDonald, eds. Estuarine and
                          wetland processes. Plenum Publishing Corp., New York.

                     Normandeau Associates Inc. 1986a. Phase 2 Report. The Coastal
                          Wetlands Mapping Program, New Hampshire. Prepared for the New
                          Hampshire Office of State Planning Coastal Program.

                     Normandeau Associates Inc. 1986b. Tasks 2 and 3 Final Report. Summary
                          of field investigations of coastal wetlands and associated road
                          crossings in the Town of Rye, New Hampshire. Prepared for the Town
                          of Rye and the New Hampshire Office of State Planning Coastal
                          Program.

                     Roman, C.T., W.A. Niering, and R.S. Warren. 1984. Salt marsh
                          vegetation change in response to tidal restriction. Environmental
                          Management 8(2):141-150.

                     Short, F.W. 1985. North Hampton Salt Marsh Study: Draft Report
                          submitted to New Hampshire's Coastal Zone Program. Jackson
                          Estuarine Laboratory, Durham, NH.

                     Simpson, M. 1986. Restoration of Parsons Creek Marsh, Rye, NH, Antioch
                          New England, M. Sc. Thesis.

                                                       34

      I
      I
      I
      I
                                                    APPENDIX 1
      1                                      TOPOGRAPHIC DATA SUMMARY

                                             1. Report of Survey
      1                                      2. Data Printout
      I
      I
      I
      I

      0
      m

      'A

      'A

                         E3V Pear-_4son-.oN.4s_4sociate_cs, Inc.
                                Consulting Engineers and Land Surveyors
                                    P.O. Box 260, Chester, N.H. 0303S
                                          Rr=F:"OR-T OF= GURVE=Y

                 April 6, 1988

                 Mr. Dave Cowan
                 Normandeau Associates, Inc.
                 *25 Nashua Road
                 Bedford, N.H. 03102-5999

                    re: Job *1600,
                         Survey of Lands on Route i-A, Rye, NH

             Dear Dave:
                 The following is the Report of Survey for both parcels of Marshland
             located on Route i-A in Rye, New Hampshireas shown on our worksheet plans
             dated April 5, 1988 enclosed with this report.

                                             RESEARCH

                 In preparation for the field work on this job, we researched our files and
             contacted the New Hampshire Department of Transportation to ascertain what
             Vertical Control monumentation might be in the area and have located some
             monuments in the vicinity of the jobs that may be used to tie to precise USGS
             elevation datum if deemed necessary in the future.

                                            FIELD WORK

                 On March 31 and April 1,   1983 we performed the field topographic surveys
             using a Topcon Electronic Theodolite survey system using two of your
             employees (yourself and Connie Delano) as rodmen. The field work for each site
             is CLS follows:

                                       Rye Harbor @South) site
                   We conducted an open-ended traverse of 6 stations, tying in to an old
             and unreliable USC&GS monument near Station 0503 which has been used as
             published for our elevation datum at this point in time. Our level loop run
             from Station 0501 to -0506 and back resulted in an error of 0. 06' vertical which
             was balanced out between stations and we also ran a level line to the east
             from Station 0501 to two shots appro-ximately 500 feet east of Station 0501.
             The assumed elevation at H-32 agreed substantially with your elevation
             reference at the culvert at Locke Road, and as -vre have discuSsed should be
             close enough for your work Fit this point in time.

                                                Cont

               S. V. Pearson As5ooiates, Ino.
               Normandeau/1600/April 5, 1988
               Page 2
                                   Nallis S-ands (Nort-h)-s-it-e-1
                  Wc conducted a traverse of 9 stations, partly open and partly looped (see
            Dwg. *1600-902) from the bridge near Rye Harbor north past Wallis Road to
            Parsons Road and Brackett Road and back across the marsh to Station 0603
            near Wallis Road. The elevation assumption for this traverse was one you
            provided at the Wallis Road Bridge centerline as discussed, and that elevation
            checked out substantially with your other given elevation at the culvert at
            Parsons Road to the north. The vertical loop closure around the northerly 6
            stations resulted in no error as recorded, so no adjustment was needed. The
            elevations south frorn Station *603 are not in that loop and are computed by
            turning point only. The horizontal math check on the northerly loop stations
            resulted in an error of 0.02', so no adjustment was made on that data either,
            and the southerly stations are again open ended.

                                          CONCLUSIONS

                The data given on the enclosed coordinate and elevation printout is based
            on the above assumptions, but the apparent precision of the work and the
            cross-checking of known elevations appear to bear out that the elevations and
            locations are reasonably accurate and should be suitable for your intended
            purpose at this point in time.
                Please note that there is some horizontal distortion of the points on the
            Bluline prints due to reproduction procedures, and if you need a precise
            printout of data points, let us know and we can forward a copy directly from
            the plotter. With the enclosed coordinate list you can also inverse between
            any desired points and determine precise orientations.

                                      RECOMMENDATIONS

                Depending on the results of your further study and analysis, verification of
            our data to established precise elevations in the field may be needed or if there
            are any additional data points that you need to recover that we were unable
            to get due to time or distance constraints, please let us know at your earliest
            convenience to arrange that work.

                Enclosed is a statement for our services for the work on these lots. If you
            have any questions on the above, please contact us at your convenience.

            Sincerely yours

                                                          ri
            Cha@ Pfaaar-i_-@on, Pr-i-a--icler-it,
            B.V. Pearson Assoc, Inc.

                    @7                                                                                                                                         r
                                                                                             4      CI S' W@              C       10                                             54 5              5'
                                                                                                             CO           W                                                             0                                4.
                -Tok,:)                   (,.Oo                                                                                 L-r 67-                                                                                          Ci       Z_,77-?-@ r-
                                                                                             12                                                                1     4 2         S CI                                    C,
                                          r3 ervo                      0                                                                                                                                          4'P 6
                                                                                                                                                        C)           4 -S,       0,
                                                                                                      4!_             k/01 719 C -01 'Je- L                                                                       4985.
                      00 coc>)Z-o k @_I P@-r@
                                                                                             4.                           Bp_%Or.@7                    27, Ci 3                  4 2,   1 ID                      5-3 1          4:31 1 \Aj A@T@ 1z LGrv t5
                                                                                                                                                                                                                  5347
                                                                              T-6
                Pei- W PA@ t                                          P5                                                                               "'DD.5        A           2
                                                                                                                 NCM-'T@4 'STPrF'rF                                  7 C,               0                         4 6                           \/eL=
                                                                                             _3     '1-35        V L;@ Arr        k Aj e.T.   r        207           -.3"D 0            5 5 0                     't..4 22
                                                                                                                         13      e Pr.C-T                                               -41                       .6 5 C, 22     7 1 Q .6
                       t5l@) \04 (T-I+ e\,j 1,*> I" C_
                                                                                                                                                                                 7                                                                             0. '7
                                                                                                                       (a Co L@,j "a"                                '7`95@2.
                                                                                                                                                                                        .-. @. . ,
                                                                                             4 . 2 6         u                 A c T-                  21 1.
                                                                                                                                                                                                   5                             _7@7r-    t"
                                                                                             S      52                    IVA\-IOIZ'r @V'@C-r 2 12                   P-3,                          7
                                                                                                    2:       c                      V'j                2 !:-:1-                  4
                                                                                             4.S4                                                                                          2.,::
                                                                                                                                                                                                                  6 53             A,! 6-rPr-F-F=@@a, 2.6'
                                                                                             8 . 7:3             P-o P,,o d     "c'                    215           P-330.423-2                                  .6 5 6 7 . 10- _2 -3. -2-*
                                                                                             2 -      2      v %A;'T3' iao P.-r            4\jGu@.*.                 T J. 3 '1                                                     5
                                                                                             4. f?7
                                                                                                                                                                                                                  7 21           6 15.                      1, '2-
                                                                                             6 . 4 5', (t '?.OoD Q -16                                                                                            7,
                                                                                                             - C U,-V, ID         r                                                                                  7
                                                                                                    32                                                                           z
                                                                                                                                                                     'P I 1             2
                                                                                                    c        --D 4
                                                                                                                                                                                                                  7, 18 3
                                                                                                                                                                                 _27    7                         7.1
                                                                                                                                                                                                                  Q 51           2 .4 1 7- 9
                                                                                                                                                                                                                  6A
                                                                                             4                                                                                   0' 4   1 S
                                                                                                                     N -                               2. 2 -3       10          8 2    7 'P.72                   6 4? 1         2 .3
                                                                                                    03--         VLO. LD C Q\.@                                      L -
                                                                                                                                                                     ?           5 2    1201,                     X,             0
                                                                                                             cv
                                                                                                                                                                                                   Ci
                                                                                                                                                                                        '32        -              646--, 2
                                                                                             4      7,            -\Ad ATva t@evu,_                                                                0 '0           A " ** @ . -5- C, if., s6r-A p%;:=          0 &41
                                                                                                                 F  CP,"%;r I                                                                                     - I. C. Q
                                                                                             2      50'
                                                                                                                                                                     f `-7              S 58 .6                   Z2 5           0 _5 6
                                                                                                    0 . 0 2
                                                                                                                           -1011 C_                                  5.,                6 0 0                     5. C,  0       0 .10 'n           !"j
                                                                                             8.75

                                                                                                                                                                                           C,
                                                                                                                                                       6 05          S470               72.34                     6 7 01 1       1-4
                                                                                             6.45                                                      .6 0 6                    --D- 46: 3. -..L
                                                                                                                                                                                        @ :@ 1                    7' 0 4 -3
                                                                                                    5,4                                                6 0 7                     2 2 .
                                                                                                                                                       6 C-I S       I ri        -7 - 6157                        .6 2 6
                                                                                             5.05
                                                                                                                                                                                        7-=8
                                                                                                                                                                                                                  6 2 '42
                                                                                                                                                                     6? i 4 , 1

                                                                                                                                                                                                          -vFP-r F@ Lj P-i-Ertz, t_@ vi@,-,

                                                 T__r                                    T-1-
                                                                                             T."Lf-I
                                                                                                                                                                                                                  EF
                                                                                                                                                         J-4..
                                                                                                                                           4 -IT

                                                                                                                                           Iji
                                                                                                             t
                                                                                             4
                                                                                                             IL

                                                                                                                 (JI
                                                                                                                                                                                                                                 'o
                                                                                                                                                                                                                                                 Q

                                                                                                                                   lei

                                           z
                                                                                                                                                                                                   IIJ

                                                                                                                                           1      1. A

                                                                                                                                                                                                                                 I
                                                                                                    ;L-L
                                                                                                    @4 o                                                                         jr+

                                                                                                                                                                  14
                                                                                                                              1_4
                                                                                                                                                                                                   4.
                                                                                     177.                                                                                               14 L_@

                 C G IN,  A'r, I ED 2 122-                                                                                                                         55
                                                                                      M k--@, 12-'=> H
                                                                                                                                                                                   5
                                                                                 r;                                    2                                      5.i
           To                                                                                                                     A 774       24 -            F
                                                                         A                                                                                       Cl 4 C'           1-1 7,1@,,
                                                                         7       .
                tj C) I     wt e-r I-A o tn@-                  oc@       M
                                                                                      L5 C) C.
                                                                                                                                                                 C,
             -ro 9                                                                                                                                  -4        4'
                                L                 'L%IA                  4       5
                        0 (fooll-0 pl-                          -JT

                                                                IL                        e, a

                                                                                             ie,
                                                                                                                                                                                   f
                                                                                                                                                                                   t=.7
               g, \,j p                                           k      4. S-7       P,-r-ro\,
                                                                                                                                                                                   5
                                                                                                                                  74          C,
                                  E3                                     4.14         e7zct5
                                                                                      q!O-rro-
                                                                                                                                                              4'--:',-4!`!         -4-4'22
                                                                         4 . 4        IFO cz a                         jj
                                                                                                                                  4 7 --t?          2 7            7, 2, .         71 7
                                                                                                                                              C.
                                                                                 7                                                4 .35       .31:114         4 -6                 14 C,

                                                                                                                       I          'T
                                                                                                                                  5     2     5:-c, 2                  3
                                                                         4.66                                          1          41 5,       F55 41             6-'-:
                                                                                                                       4                .1
                                                                                                                                              -26"
                                                                                                                       A                U
                                                                         4.67         t@@ D c, e7                                 5L,               S                              5,25-
                                                                                 5 1.                                             513 2.:@    637'E           40"76.4'
                                                                         4.76                a:                        2.1,       50'2-t: . 5 -1-7 'P 4       4 3 77 . 06 5 5
                                                                         .1 . 7                                                   4--3 5 . ? 3 45             4 7 42'. C4 10
                                                                                                                                  "-1' 1 .@P64@1              475S.                -I"
                                                                         2 . IF5                                       3          . , 17 1          1--
                                                                                                                                  - - -r' '-' 7 . .72' 4      -^ 7
                                                                         4       .72                                                          -.L   6         't.
                                                                                                                                                                                   0:@51
                                                                                                                                                    5 6          3 t--, Z, . 2,3- @3
                                                                                         c-,                           5          -,S4@.'@',Q
                                                                                                                                  4? 4 ? . 5 -7 22::@         4 "-:.'5.: . 2 -1**. 7 `3
                                                                         A            C-7t)                                       4852. 8,:@C-@'              43'"" -9 . 51
                                                                                                                                  A.6   1     1
                                                                                 -19                                                                          4S'Z' SP
                                                                         1       .4.6 Zo T7-o                          2'.p       6 51 1      s 5             4 3 E39              7 0 -17 3
                                                                                 42                                               4     5 2   G.'42 6         4 3 1'37             .6 2 5
                                                                                                                                                                                   C"; I =
               A"                                                        4. 71"                                        31 1       4     5 8   C'- 8 1         434S. -A 5
                                                                         3.15                                                     4 G 12 .                    42SI . 7152
                                                                                 54                                               1     4                     4 15 0 . 59:4
                                                                         ! . A-                                                   4     2
                                                                         4 .,@.Ci
                                                                                                                                              `5    1'3'
                                                                         3-01
                                                                                 85   C-@ C)                                      5     1     2 4 2"
                                                                                 S2                                                                                    0
                                                                                                                                  5145., 122
                                                                         .1.73        5                                6          5j. 43            7 7 5,
                                                                                 3"S  to Gs                            IF
                                                                                                                                  -4 3
                                                                                                                                        1     5 @63           36 1 ?. 2 S
                                                                                      u                                                                          2 -8 1            4
                                                                         3       1    Li (1                            1          4
                                                                                                                                  4 2 7,?
                                                                                      eV C. a                                                                                      C
                                                                                                                                  25, S
                                                                                 7,:  S u Y'.       t5
                                                                                                                                        14          - 4 5

                                                                                                   vv-,
                                                                                 7    ?,o
                                                                                                                       4 "1       4 -2 7' 5         5
                                                                         4                                             4"                                                          i C, C,
                                                                         A                                             i., -1                                 - 7 -.n--
                                                                                      UO C-e                           I t7                                   '2 (P 5 5            2 S 'Z.-=.
                                                                                                                                  4     5     51
                                                                         2
                                                                                                                       5 Cl
                                                      UA-                3.                                            5-2                                       7 r; C@
                                                                                                                                              14
                                                                         '3,     3.i       0

                    4j-r                                                              1 Iq V 16 R-7 e
       A                                                                               v v,10crrele
                                                                                 @7                                                     C7

                                                                                                                                  4;

                                                            -0 . 1 2r-g@"Y-- ftTT'zf@          ILI-6     4857.046-17                 4 2           0
                                                                                                                                     .1
                                                                                               i Q@      4 5":           4
                                                              .:P2 c-:0
                                                                                                         4:= 1 S . 1':@O S.          4-284 . -7 4 G.'.'3'

                                                            71
                                                                        C %a @-V G* IZT                         C.
                                                                                                         4:34' 5  4
                                                                        \j ewr " c-"
                                                                                                         .4
                                             .5 5                    US Gs 5m
                                                                '3   C-o \-\j    13 v tF 14-r
                                                                             D                           ;a        551 -t@
                                                                                                                     5, 5
                                                                                                                                     7      2
                                                                78'                                      4
                             0,
                                                            2,  2f :PC %-V                               -'.2.         'S 5
                                                                                                                                         7 . 5

                                                                              %-8 WC@L
                                                                                                             w L

                                                                     s
                                                                     m           -c)
                                                            .2  5.   cj \-\J  tl
                                                                -7 cu'.. t"i\j-.,.I-r
                                                                                                                                     2?6-6 . 5,072'
                                                                                                           1   5 . 4 0 -4 5,         26 4 . 0'7-'S 0
                               C). 3                                 yj 0-TS9- Ue-4eL H
                                                                       - '. .                              i     . '@ 4 7 e,-'
                                                                                                 2
                                                                                                                       2             1 S'5 . '5  132
                                                                                                                       2 G                 . 40
                                                                                                         3 10 7 -     87"'
                                                                                                         f; 05 4   34 62
                                                                                                             5 0       5
                                                                                                           0. cl cl . cl cl 1) cl    50 00 . Cl 0
                                                                42'                            5   2         4"0' . 2  22 3          4 4 Cl -S . 1-16 4 0
                                                                                                                                     `758.445-@
                                                                                               5)
                                                  P\-)
                                                                                                            -4     52 6, 7           ST
                                                                                               5..       42 5 .
                                                                   0                           550 51    3 7 --"f 6 . '17 7 4 6
                                                                                                         'DO E32 . 0 30.                    1 "86
                                                                15
                                                                              %@e
                                                                                     -MV,.,Lo         e: r, C-r -

                                              U      fA C tF         S-1 6.   '7

                                                  UZI.
                                                  U   .
                                                  UZI.
                                                  U
                                                                                                                             IFFT
                                                                                                 1 -4.

                                                   -AL
                             :2 ul

                                >

                                                                                    IL

                                                                                       L
                             a:    LU -4-41                                                  0
                                                        -L L
                                   LL-
                                                                         I    T

                                                                                                                   T-i
                                                                                                                                        D
                                                                                                                          -; 41

                                                                                                   IL

                                                      .4
                                                                                                      L
                                                                                                                              L

                                                     APPENDIX 2

                                   STORMWATER RUNOFF AND TIDAL FLOOD SUMMARY DATA
                                      FOR 10-YEAR, 50-YEAR, AND 100-YEAR FLOODS

                                      1.  HEC-1 Stormwater Runoff Summary
                                      2.  Watershed Map for HEC-1
                                      3.  Army Corps of Engineers Tidal Flood Base Map
                                      4.  Army Corps of Engineers Tidal Flood Profile

                                                 RYE, NEW HAMPSHIRE
                                                  WATERSHED SUMMARY

                               10 YEAR                  50 YEAR                100 YEAR

                       PEAK FLOW TOTAL VOL.         FLOW TOTAL VOL.     PEAK FLOW TOTAL VOL.
             WATERSHED     CFS        CF            CFS        CF            CFS        CF

             PHILBRICK
                  1         44       2,600,000      78        4,900,000      92      6,200,000
                  2         12       1,000,000      19        1,600,000      21      1,800,000
                  3         72       4,700,000      121       8,300,000      140    10,400,000
                  4         3          300,000      4           300,000       5        500,000
                  5         3          300,000      4           300,000       4        300,000
             SITE 7         3          300,000      4           300,000       4        300,000
             SITE 10        12       1,000,000      19        1,600,000      21      1,800,000
             SITES 9  & 1   56       1,600,000      97        6,500,000      111     1,000,000
             SITE 11        3          300,000      4           300,000       4        300,000
             SITE 12        72       4,700,000      121       8,300,000      140    10,400,000

             WALLIS SANDS
                  1        32        2,000,000      58        3,600,000      69      4,700,000
                 11        22        1,300,000      40        2,600,000      48      3,100,000
                111        24        1,600,000      37        2,800,000      42      3,400,000
                 IV        67        4,700,000      110       8,000,000      128    10,100,000
                  V        126       8,800,000      212       15,300,000     248    18,900,000
                 VI        8           800,000      12        1,300,000      13      1,300,000
                vii        73        5,400,000      121       9,000,000      140    11,100,000
               VIII        51        3,100,000      88        6,000,000      104     7,500,000
             SITE 1        24        1,600,000      37        2,800,000      42      3,400,000
             SITE 2        8           800,000      12        1,300,000      13      1,300,000
             SITE 4        67        4,700,000      110       8,000,000      128    10,100,000
             SITE 5        3.2       2,000,000      58        3,600,000      69      4,700,000
             CONCORD PT.   126       1,800,000      212       15,300,000     248    18,900,000

                                           A
                                                                                                                                                    @p
                                                                                                       40'                                                                                                    5
                                                                                                                          wyn                                                   11yhac                    J-h
                                                                                                                         ark

                                      d>    I
                                                                                                                                          35
                                                                                                                                                                                                                7
                                                                                 ce                                                                                                                                                        Pond- -
                                                                              A4
                                                                                                                                                                                                                                                             4 -ho-*
                                                   4V
                                                      V                                                                                                                                             _7@
                                                                                                                                                                                                                         5
                                                                                                                                                                                                                  W(AD
                                                                                                                                                                                                                                                        Y1
                                                                           rn                                                                -Brook
                                                                                                                                                 Rye E
                                                                                                                                                          lementary
                                 Z\                                                                                                                               Se
                                              x
                                                                                                                                                                  angs                                                                                   B ach
                                                                                                                                                                L
                                                                                                                                                                  orh
                                                                                                                                                                      qr.           ....    -                                                 3
                                                                                                                                                                                                                                              40
                                                                                                                                                                0
                                                                                                                                                                0
                                                                                                                                                                ,

                                                                                                                                                                  S
                                                                                                                                                                                                                                -'ZV       -'- 'Wallid
                                             .c                    0
                                             A@
                                                                                        7                                                                                                                                                         Sandi
                                                                                               z
                                                                     det                                                                                                                                     T                                                          Z7
                                                                                                                                                                                                                                              State
                                                                                                                                                                                                             0
                                                                 P rk
                                                                                                                                                                                                                                              Beach
                                                                                                                                                                                                                             VIE
                                    Ap
                                                                                                                                                                                                                                                     12                         42

                           N:
                                                                                                                                                                                                                    -7                             oncor
                                                                                                                                                                                                                                                  Pt
                                                                                                                                                                                                           VIII
                                                                                                                     J,  High              WA
                                                                                                                          rh
                                                                                                         Wedgewood                             shwGY0               S7
                                                                                                                                   6                                                                                  Rye
                                                                                                                Cann                                                        "S
                                                                                                                              ye                                                                             @Mrth          Ch7z
                                              -Z
                           Tra                                                                                                                                                                                                                                9
                           Park
                                                                                                         R                          E
                                                                                                                                                                                                                         Rye
                                                                                                                           Cent I                                                                                     North Beach
                                                                                                                           Cern
                                                                                                                             nt

                                                                                                                                                                                   min                                IL

                                                                                                                                                                                   7n
                                                                                                                                                                             -S   I
                                                                                                                                                                                     p
                                                                                                                                                             RY5 EI;AjBC`
                                                                                                                      FA                                                                                Foss
                                                                                                                          -2                                                                            Beac
                                                                                                                                                              STATE PARK

                                                                                                                                                                              A                                                  ?2
                                                                                                                                                                                                        'SRY
                                                                                                                                                                                                          E AARBOR
                                                                                                                                                                                                          ATE
                                                                                                                                                                                                               FARJE.
                                              st R                                                                                                                                                             Ragged Neck                                                   LEG
                                                                       .0
                                                                                                                                                                                                                Point
                                                                                                                                                                                            Harbor                    S                                                      DRA
                                                                                     67                                                                                         re
                                                                                                                                                                                                 Harbor'
                                                                                                                                                                      @A/                       Rye                                                                          SUB
                                                                                                                                                                      7
                                                                          0

                                                                                                                                                                                                                         NORMANOEAU             ENGINEERS INC.
                                                                                                                                                            Un
                                                                              B
                                                                                                            uarry
                                            73                                                                                            Road**
                                                                                                                                                                                                                                      The Concord Center
                                                                                                                                                                                                                                        Ferry Street, Box 7
                                                                                                                                                                                                                                      10
                                                                                                           Q                             631 e                                                                            a unit of Thermo      Water   Management

                                                                                                                                                  h
                                                                                                                                                                                                                                      Concord. NH 03301
                                                                                                                                                                            W_iAc%j,)@k     0000                                         603-224-5770
                                                                                                                                                  A.
                                                                                        R        Y         E                                                                  Straw Pt FEET

                                                                                                                                                                                               ............

                                                                                                                                                                                                                                                                                                                                                                                  .F
                                                                                                                                                                                                                                                                                                                                 E
                                                                                                                          A                                                    B                                                                                                D
                                                                            CORPS OF ENGINEERS

                                                                                                                                                                        -?o0

                                                                                                                                                                           FZ5SAcHvSETTS

                                                                                                                                                                        00
                                                                                                                                                              190

                                                                                                              -A\
                                                                                                                                                                                 A
                                                                                                                                                                                           /;.o
                                                                                                                                                                                                   Do
                                                                                                                                        A A-,- .0 , -, , " ,
                                                                                                                                                          J                A.
                                                                                                                                                            A                                         A T h               A                   I C
                                                                                      Ny@'                     I                 \,                                        .   .1
                                                                                       7'

                                                                                                                                                                           do
                                                                                                                                                                               00
                                                                                                    Ic

                                                                                                       AA.
                                                                                                                                                 00
                                                                                                                                                      00
                                                                                                                                                               v --T I-- r
                                                                                                                                          M A      S  A C III
                                                                                                                 A
                                                                                                                                                                                                                0 C F A                    N
                                                                                                                                                       IWO
                                                                                     -_ Itt -@
                                                                                                                                                      SAIr  00
                                                                                             A>

                                                                                                                  A

                                                                                                                                                                                                                                                                                                                                                                                     clft

                                                                                                                                                                                     \TO

                                                                                                                                         A.
                                                                                                                                                                                                                '1104 Cf
                                                                                                                                                                                                                               60 0

                                                                                                                   al
                                                                                                                                       e 7,                                                                                                                                                                                                                           cAmg
                                                                                                                                  -7
                                                                                                                                        -'..    11/                            1                       00
                                                                                                           r

                                                                                                                                                                                                                                                                          moul'                       00
                                                                                                                                                                                                                CAPE                                                                            -50
                                                                                                                                                %,c                                                                    COD
                                                                                                                                                                                                                            sAr
                                                                                                                                                                                                                                                                                                                                          Z

                                                                                                                                                                                                                                                                                                                                                   _AAA_
                                                                                                                                                                                                                                                                                                                                                                                 HAM
                                                                                                                                                                                                                00                                          so 00
                                                                                                                                                                                                        \0
                                                                                                                                                                                                                                                                                                            00
                                                                                                                                                          7,                                                                                                                                         20
                                                                                                                                                                                                                                                                                                                                                                      00
                                                                                                                                                                                                                                                                                Z"I
                                                                                                                                                                                                                                                                                                                                                               190

                                                                                       t

                                                                                                                                                                                      _AAt                                                                                   ir

                                                                                                                                                                                                                                                                                                     10
                                                                                                                                                                                                                &A . ......                                                                                00
                                                                                                                                                                                                                                                                                                                                                                                      r-4

                                                                                                                                                                                                                                                                                              0
                                                                                                                                                         /*                                                                    N A A*                                                              00

                                                                                                                                                                                                                                                                                                                                                                                                                                       I
                                                                          COPPS OF ENGINEERS                                 A                                                                                                    C                                                   D                                                    E                                                    F                                                      G                                             H                                 U. S. ARMY
                                                                                                                             I                                                                                                     I                                                  I                                                    1                                                    4                                      1               1
                                                                                             15          URSON               ?112                                                                                                                                                                                                                                                                                                      1-
                                                                                                                              0234                                                                Ix                                                                                                                                                                                                                                                   Ui
                                                                                                                             @l 2                                                                 0
                                                                                                                                                                                                                                                                                                                                                                                                                                       if,             9.7
                                                                                                                                                                                                                                                                                                                                                                                                                                                       to                                                            _UJ-              14
                                                                                             14W
                                                                                                         -                   ,-                                                                   I                                                                     "   US
                                                                                                                aiii                                                                                                                                                                                                                                                                                                                                   Ui
                                                                                                                                                                                                                                                                                                                                                                                                fA
                                                                                                                                                                                                                                                                                                                                   0                                                            01                                                                                                                            03
                                                                                                                                                                                                                                                                                                                                   DO                                                           Q.                                                     Ui
                                                                                                         142 *               @g
                                                                                                                                                                                                                                                                                                                                                                                                            CS,
                                                                                                                s'C                                                                                                               SO
                                                                                                                                                                                                  x                               16        ilto                        US                                                                                                                      fox                                                    Ci                                                                     U.
                                                                                                                                                                                                  u
                                                                                             31                 1.,                                                                               a                                                                     '41 w
                                                                                             US                                                                                                   w                                                                     <1Z
                                                                                                                                                                                                                                                                                                                                   cc                                                           CL
                                                                                                                                                                                                                                                              1.                                                                   0                                                            w
                                                                                                                                                                                                                                            -100.
                                                                                             12  r/001 Y_rAR                 rRioyENc Y  r1DA L        DOD                                                                                                                                                                                                                                                                                                                                                                    131,
                                                                                                                             - *2.6                                                       ot's                                                                                                                                                                                                                                                                                 -aocy rIDAZ FLOOD
                                                                                                                *17' 295                                                                                                                                                                                            141                                                                                                                                _@00 YEAR FRE
                                                                                                                2
                                                                                                                1:&.1"',                                                                                                                                                                                                                                                                                                  SAY                                   CASCO SAY
                                                                                                                7
                                                                                                                "'2130,            221 >.Igo                                                                                                                                                                        F_                                                                                         SACO         ------                                                                         5,
                                                                                                                             At.ELI.                                                                                                                                                                                                                                                                                                                                                   955
                                                                                                         273                        To-                                                                                                            *'a. 670f,1@3                 1 .0
                                                                                                                             SIC ... LE ." D..                                                                                              9,0 0.411                      >::,*                                                   /00 YEAR FRfOUENCY 77DAL FLOOD                               93                                                     ea. jc-Z-BRj1ARY 1978 TIDAL FLO
                                                                                                                             254                                                                                                                           72                                                              @4FZWRUARr 1978 TIDAL FLOOD **.                                                                             I .             ". ."                       .Cl
                                                                                                                                                                                                                                                                                                                                                                                                  *It
                                                                                                                                                                                                                                                   0                                                                                                                                                                                                   .78                                            1                                1so
                                                                                             10                              lmrrnt-                                                                                                               ...                                                                                                                                                                                                 @IE                                -51
                                                                                                                                                                                                                                                                   -DIS                                                                                                                                                                                G.,,cl
                                                                                                                                                                                                                                                                   -D'S                                                                                                                                                                                                                                                                                -2
                                                                     2-                                                                                                                                                                                            _,261I
                                                                                                   FEBRIIARY 1978                           FL                                                                                                                                          --Zas
                                                                                                                                            '110                                                                                                                                 1*-                                               - --d
                                                                                                                                TIDAL          ODD                                                                                                                                                                                                           I              I                                                                                             a                                                   .3
                                                                                                                                                                                                                                                                                                                                              7  FRFOUENCY TIDAL FLOOD
                                                                                                                                                                                                                                                                                                                  vat

                                                                                                                                                                                                                                            0203                                                                                                                                                                                                                         1978 TIDAL FLOOD
                                                                                                                             or,v                       IS.               -Z-                                                                                          *m                                                                                                                                                                              +J,;AIIIARY
                                                                                                                                         10,                                                                                                                                                               U2                      /0  YEAR FREQUENCY 71DAL FLOOD                                                                                                                                                             0-1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              45*
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      #be
                                                                                                                             141                                                                                                                                                                                  0.06
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              -.0      7
                                                                                                                Set*                                     *2111                                                                                         0142              .S                              IDS.
                                                                     3-                                                                                                                                                                                            '47

                                                                                                                                                                                                                                            mo
                                                                                                                                                                                                                                                                                                                                                                                                                                                       000

                                                                                 >
                                                                                                                                                                                                                                                                                      rM           HIGH WATER LEVEL""

                                                                                 0                                                                                                                                                                                                                                                                                                                                                                                                                                                     4
                                                                                             4LU
                                                                                             J                                                                                                                                                                                                                                                                                                                                                                                                                                                         -4
                                                                     4
                                                                                             0                                                                                                                                                                                                                                                                                                                                                                                                                                U.
                                                                                             gr                                                                                                                                                                                                                                                                                                                                                                                                                               10
                                                                                 U.          311.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              QIx
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              +Is.
                                                                                                                                                                                                                                                                                                                                                                                     LEGEND-                                                                                                                                  10
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              CIA
                                                                                                                                                                                                                                                                                                                                                                                                7 FEBRUARY 1970    HIGH WATE                                                                                                           -2
                                                                                             -K                                                                                                                                                                                                                                                                                     0           9 JANUARY 1970 HIGH WATER                                                                                                     w
                                                                                             Z I-                                                                                                                                                                                                                                                                                                                                                                                                                             I.-
                                                                                                                                                                                                                                                                                                                                                                                    G           2 FEBRUARY 1976 HIGH WATER
                                                                                 W,                                                                                                                                                                                                                                                                                                66           NUMBER IDENTIFIES   HIGH WATER
                                                                                                                                                                                                                                                                                                                                                                                                MARK AS GIVEN IN OFFICE REC                                                                                                   x
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       -5
                                                                                                                                                                                                                                                                                 NATIONAL         GEODETIC          VERTICAL         DATUMtl)
                                                                                                                                                                                                                                                                                                                                                .10                                                                                                                                                                                    0

                                                                                                                                                                                                                                                                                                                                                                                   NOTES:
                                                                                                                                                                                                                                                                                                                                                                                       1. VARIES FROM      YEAR TO YEAR. VALUE GIVEN
                                                                                                                                                                                                                                                                                                                                                                                       HERE BASED 001 It-YEAR SERIES OF TIDE O9Sflt-
                                                                                                                                                                                                                                                                                                                                                                                       VA IONS ENDING IN 1950. BY TME NATIONAL
                                                                                                                                                                                                                                                                                                                                                                                       OCTAM SURVEY (FORMERLY USC & CS).
                                                                                                                                                                                                                                                                                                                                                                                       2.       FIXE 0 'It FERENCE ADOPTED AS A STANDARD
                                                                                                                                                                                                                                                                                                                                                                                       GE       AODETIC DATUM FOR ELEVATIONS IN YME UNITED
                                                                                                                                                                                                                                                                                                                                                                                       SY       YES Of AM RIC A. FORMERLY REFERRED TO
                                                                                                                                                                                                                                                                                                                                                                                                A
                                                                                                                                                                                                                                                                                                                                                                                                           VEL (Id S L) DATUM'         BUT NOT
                                                                                                                                                                                                                                                                                                                                                                                                        to  IN ITH LOCAL MEAN          @E=
                                                                                                                                                                                                                                                                                                                                                                                       AS       MEAN SEA Lf                                                                                                                                            -6
                                                                     6-                                                                                                                                                                                                                                                                                                                To BE CONFUS
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1                  -3
                                                                                             -3                                                                                                                                                                                          M A LOW WATER LEVEL"'

                                                                                             -4                                                                                                                                                                                                                                                                                                                                                                                                                                        -4

                                                                                             L
                                                                                             135         f40                            ISO                          160                            170                           lao                            Ito                          200                            210                           220                                  230                    240                             250                          260                           2?0                  275             -7

                                                                                                                                                                                                                                                STATUTE          MILES FROM MONOMOY POINT, CAPE COD

                                                                     S_                                                                                                                                                                                                                                                                                                    0                                                                                                                   NEW ENGLAND COASTLINE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  T I DAL FLOOD SURVEY
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  TIDAL FLOOD PROFILE NO. I I
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                COHASSET, MASS. TO
                                                                                                                                                                                                                                 Ti                                                                                                                                                                                                                                                              GEORGETOWN, MAINE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                    ;, @t. rr-1-1

                                                                                                                                                                                                                                                                            St. Is

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   DEPARTME 7 OF I-E ARM'
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       MEW EMOt.  AND OIVISI@@. COOPS OF ENGINEERS
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          W-LI.A.. MASS

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              PLATE C-26

                                                     APPENDIX 3

                                         DATA SUMMARIES OF HYDROLOGIC SURVEY
                                                    16 MARCH 1988

                                         1.  Concord Point Bridge - Flow
                                         2.  Concord Point Bridge - Water Quality
                                         3.  Wallis Sands Stations - Flow
                                         4.  Wallis Sands Stations - Water Quality
                                         5.  Rye Harbor Bridge - Flow
                                         6.  Rye Harbor Bridge - Water Quality
                                         7.  Philbrick Brook Stations - Flow
                                         8.  Philbrick Brook Stations - Water Quality

    'A

                    CONFLOW.WK1         CONCORD POINT BRIDGE
                    TOWN OF RYE   SALT MARSHES        NAI PROJECT #4119
                    FLOW SURVEY   3-16-88

                    DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

                    STATION TIME         DIRECTION     VELOCITY LEVELIN INVERTIN      H20DEPTH
                            1     10:10            -1         0      5.97      2.76       3.21
                            1     11:25            -1      -0.4      4.42      2.76       1.66
                            1     12:50            -1      -0.4      3.96      2.76        1.2
                            1     14:00            -1      -0.2      3.32      2.76       0.56
                            1     15:30            -1         0      3.06      2.76        0.3
                            1     17:45            -1         0      2.86      2.76        0.1
                            1     18:45            -1         0      2.86      2.76        0.1
                            1     19:50             1         0      3.12      2.76       0.36
                            1     21:35             1       0.5      5.22      2.76       2.46
                            1     22:30            -1         0       5.2      2.76       2.44
                           10     10:30            -1     -0.93      5.42      0.96       4.46
                           10     11:43            -1      -1.5      4.33      0.96       3.37
                           10     12:59            -1      -1.5      3.84      0.96       2.88
                           10     14:22            -1      -0.9      3.32      0.96       2.36
                           10     15:43            -1     -0.52      2.98      0.96       2.02
                           10     17:53            -1     -0.45      2.86      0.96        1.9
                           10     18:45            -1         0      2.86      0.96        1.9
                           10     20:07             1       0.6      3.54      0.96       2.58
                           10     21:52             1       0.3      5.35      0.96       4.39
                           10     22:30            -1         0       5.2      0.96       4.24
                           11     10:35            -1      -1.3      5.37      1.28       4.09
                           11     11:45            -1      -2.1      4.32      1.28       3.04
                           11     13:00            -1      -1.5      3.83      1.28       2.55
                           11     14:24            -1      -0.7      3.32      1.28       2.04
                           11     15:44            -1     -0.48      2.97      1.28       1.69
                           11     17:54            -1      -0.2      2.86      1.28       1.58
                           11     18:45            -1         0      2.86      1.28       1.58
                           11     20:09             1       0.6       3.6      1.28       2.32
                           11     21:54             1       0.2      5.36      1.28       4.08
                           11     22:30            -1         0       5.2      1.28       3.92
                           12     10:40            -1      -1.6      5.32      2.79       2.53
                           12     11:45            -1      -1.5      4.32      2.79       1.53
                           12     13:00            -1      -1.4      3.82      2.79       1.03
                           12     14:25            -1      -0.2      3.32      2.79       0.53
                           12     15:45            -1     -0.18      2.96      2.79       0.17
                           12     17:55            -1     -0.06      2.86      2.79       0.07
                           12     18:45            -1         0      2.86      2.79       0.07
                           12     20:10             1       0.3      3.68      2.79       0.89
                           12     21:55             1       0.1      5.36      2.79       2.57
                           12     22:30            -1         0       5.2      2.79       2.41
                            2     10:10            -1         0      5.87      2.91       2.96
                            2     11:27            -1      -0.9      4.41      2.91        1.5
                            2     12:51            -1      -0.4      3.94      2.91       1.03
                            2     14:00            -1      -0.2      3.32      2.91       0.41
                            2     15:30            -1         0      3.06      2.91       0.15
                            2     17:45            -1         0      2.86      2.91      -0.05
                            2     18:45            -1         0      2.86      2.91      -0.05
                            2     19:50             1         0      3.12      2.91       0.21
                            2     21:36             1       0.5      5.23      2.91       2.32
                            2     22:30            -1         0       5.2      2.91       2.29
                            3     10:15            -1     -0.64      5.77      2.76       3.01

                            3    11:29             -1      -1.2       4.4      2.76      1.64
                            3    12:52             -1      -0.9      3.92      2.76      1.16
                            3    14:02             -1      -0.2      3.32      2.76      0.56
                            3    15:30             -1      -0.2      3.05      2.76      0.29
                            3    17:45             -1         0      2.86      2.76       0.1
                            3    18:45             -1         0      2.86      2.76       0.1
                            3    19:50              1      0.29      3.06      2.76       0.3
                            3    21:38              1       0.4      5.25      2.76      2.49
                            3    22:30             -1         0       5.2      2.76      2.44
                            4    10:15             -1    -0.47       5.72      2.46      3.26
                            4    11:31             -1      -1.2      4.39      2.46      1.93
                            4    12:53             -1      -1.1       3.9      2.46      1.44
                            4    14:05            --l      -0.6      3.32      2.46      0.86
                            4    15:32             -1      -0.3      3.04      2.46      0.58
                            4    17:45             -1         0      2.86      2.46       0.4
                            4    18:45             -1         0      2.86      2.46       0.4
                            4    19:53              1       0.7      3.12      2.46      0.66
    -71                     4    21:40              1       0.6      5.26      2.46       2.8
                            4    22:30             -1         0       5.2      2.46      2.74
                            5    10:20             -1    -0.68       5.67      1.91      3.76
                            5    11:33             -1      -1.3      4.38      1.91      2.47
                            5    12:54             -1      -1.3      3.89      1.91      1.98
                            5    14:07             -1      -0.7      3.32      1.91      1.41
                            5    15:34             -1    -0.35       3.03      1.91      1.12
                            5    17:45             -1    -0.33       2.86      1.91      0.95
                            5    18:45             -1         0      2.86      1.91      0.95
                            5    19:56              1      0.75      3.19      1.91      1.28
                            5    21:42              1       0.5      5.28      1.91      3.37
                            5    22:30             -1         0       5.2      1.91      3.29
                            6    10:20             -1    -0.91       5.62      1.36      4.26
                            6    11:35             -1      -2.1      4.37      1.36      3.01
                            6    12:55             -1      -1.4      3.88      1.36      2.52
                            6    14:10             -1      -0.8      3.32      1.36      1.96
                            6    15:36             -1    -0.46       3.02      1.36      1.66
                            6    17:46             -1      -0.4      2.86      1.36       1.5
                            6    18:45             -1         0      2.86      1.36       1.5
                            6    19:58              1       0.7      3.26      1.36       1.9
                            6    21:44              1       0.5      5.29      1.36      3.93
                            6    22:30             -1         0       5.2      1.36      3.84
                            7    10:25             -1      -1.1      5.57      1.01      4.56
                            7    11:37             -1      -1.8      4.36      1.01      3.35
                            7    12:56             -1      -1.5      3.87      1.01      2.86
                            7    14:14             -1      -0.8      3.32      1.01      2.31
                            7    15:38             -1    -0.38       3.01      1.01           2
                            7    17:48             -1    -0.33       2.86      1.01      1.85
                            7    18:45             -1         0      2.86      1.01      1.85
                            7    20:00              1      1.15      3.33      1.01      2.32
                            7    21:46              1       0.8      5.31      1.01       4.3
                            7    22:30             -1         0       5.2      1.01      4.19
                            8    10:25             -1    -1.41       5.52      1.11      4.41
                            8    11:39             -1      -2.1      4.35      1.11      3.24
                            8    12:57             -1      -1.5      3.86      1.11      2.75
                            8    14:18             -1      -0.9      3.32      1.11      2.21
                            8    15:40             -1    -0.52           3     1.11      1.89
                            8    17:49             -1    -0.33       2.86      1.11      1.75
                            8    18:45             -1         0      2.86      1.11      1.75
                            8    20:03              1         .1      3.4      1.11      2.29
                            8    21:48              1       0.1      5.32      1.11      4.21
                            8    22:30             -1         0       5.2      1.11      4.09
                            9    10:30             -1    -1.08       5.47      1.11      4.36

                          9     11:41            -1      -1.6      4.34      1.11      3.23
                          9     12:58            -1      -1.5      3.85      1.11      2.74
                          9     14:20            -1      -0.8      3.32      1.11      2.21
                          9     15:42            -1      -0.6      2.99      1.11      1.88
                          9     17:51            -1      -0.3      2.86      1.11      1.75
                          9     18:45            -1          0     2.86      1.11      1.75
                          9     20:05              1       0.7     3.47      1.11      2.36
                          9     21:50              1       0.5     5.34      1.11      4.23
                          9     22:30            -1          0       5.2     1.11      4.09

           CONQUAL.WK1         CONCORD POINT BRIDGE
           TOWN OF RYE SALT MARSHES
           WATER QUALITY SURVEY 3-16-88

           DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

           STATION TIME         DIRECTION  TEMP      COND      SAL
                        10:10           -1          4   28000        30
                    1   11:25           -1          7   30000        30
                    1

                    1   12:50           -1          6   27000        27
                    1   14:00           -1          7   23000        22
                    1   15:30           -1          0        0         0
                    1   17:45           -1          0        0         0
                    1   18:45           -1          0        0         0
                    1   19-:50            1         0        0         0
                    1   21:35             1         3   27000        30
                    1   22:30           -1          0        0         0
                  10    10:30           -1          4   28500      30.5
                  10    11:43           -1          5   30000        31
                  10    12:59           -1          6   27000        27
                  10    14:22           -1          6   22000        22
                  10    15:43           -1          7   20100      19.5
                  10    17:53           -1          6   19000        18
                  10    18:45           -1          0        0         0
                  10    20:07             1         4   27000        29
                  10    21:52             1         4   27000        29
                  10    22:30           -1          0        0         0
                  11    10:35           -1          4   29000        31
                  11    11:45           -1          5   30000        31
                  11    13:00           -1          6   27000        27
                  11    14:24           -1          6   22000        22
                  11    15:44           -1          7   20100      19.5
                  11    17:54           -1          6   19000        18
                  11    18:45           -1          0        0         0
                  11    20:09             1         4   27000        29
                  11    21:54             1         4   27000        29
                  11    22:30           -1          0        0         0
                  12    10:40           -1          4   28500        31
                  12    11:45           -1          6   30000        30
                  12    13:00           -1          6   27000        27
                  12    14:25           -1          6   22000        22
                  12    15:45           -1          7   20100      19.5
                  12    17:55           -1          6   19000        18
                  12    18:45           -1          0        0         0
                  12    20:10             1         4   27000        29
                  12    21:55             1         4   27000        29
                  12    22:30           -1          0        0         0
                    2   10:10           -1          4   28000        30
                    2   11:27           -1          6   30000        30
                    2 - 12:51           -1          6   27000        27
                    2   14:00           -1          7   23000        22
                    2   15:30           -1          0        0         0
                    2   17:45           -1          0        0         0
                    2   18:45           -1          0        0         0
                    2   19:50             1         0        0         0
                    2   21:36             1         3   28000        30
                    2   22:30           -1          0        0         0
                    3   10:15           -1          4   28000        30

                    3    11:29            -1        5     30000        31
                    3    12:52            -1        6     27000        27
                    3    14:02            -1        7     23000        22
                    3    15:30            -1        6     21000      20.5
                    3    17:45            -1        0         0          0
                    3    18:45            -1        0         0          0
                    3    19:50             1        0         0          0
                    3    21:38             1        4     27000        29
                    3    22:30            -1        0         0          0
                    4    10:15            -1        4     28000        30
                    4    11:31            -1        5     30000        31
                    4    12:53            -1        6     27000        27
                    4    14:05            -1        7     23000        22
                    4    15:32            -1        6     21000      20.5
                    4    17:45            -1        0         0          0
                    4    18:45            -1        0         0          0
                    4    19:53             1        5     17000        17
                    4    21:40             1        4     28000        29
                    4    22:30            -1        0         0          0
                    5    10:20            -1        4     28000        30
                    5    11:33            -1        5     30000        31
                    5    12:54            -1        6     27000        27
                    5    14:07            -1        7     23000        22
                    5    15:34            -1        7     20500      19.8
                    5    17:45            -1        6     19000        18
                    5    18:45            -1        0         0          0
                    5    19:56             1        4     33000        25
                    5    21:42             1        4     27000        29
                    5    22:30            -1        0         0          0
                    6    10:20            -1        4     28000        30
                    6    11:35            -1        5     30000        31
                    6    12:55            -1        6     27000        27
                    6    14:10            -1        7     23000        22
                    6    15:36            -1        7     20500      19.8
                    6    17:46            -1        6     19000        18
                    6    18:45            -1        0         0          0
                    6    19:58             1        4     25000        26
                    6    21:44             1        4     28000        29
                    6    22:30            -1        0         0          0
                    7    10:25            -1        4     28000        30
                    7    11:37            -1        5     30000        31
                    7    12:56            -1        6     27000        27
                    7    14:14            -1        6     22000        22
                    7    15:38            -1        7     20500      19.8
                    7    17:48            -1        6     19000        18
                    7    18:45            -1        0         0          0
                    7    20:00             1        4     26000        27
                    7    21:46             1        4     28000        29
                    7    22:30            -1        0         0          0
                    8    10:25            -1        4     28500      30.5
                    8    11:39            -1        5     30000        31
                    8    12:57            -1        6     27000        27
                    8    14:18            -1        6     22000        22
                    8    15:40            -1        7     20000      19.8
                    8    17:49            -1        6     19000        18
                    8    18:45            -1        0         0          0
                    8    20:03             1        4     26000        28
                    8    21:48             1        4     27000        29
                    8    22:30            -1        0         0          0
                    9    10:30            -1        4     28500      30.5

                   9    11:41            -1        5    29000        30
                   9    12:58            -1        6    26000        27
                   9    14:20            -1        6    22000        22
                   9    15:42            -1        7    20000       19.5
                   9    17:51            -1        6    19000        18
                   9    18:45            -1        0          0        0
                   9    20:05             1        4    27000        28
                   9    21:50             1        4    27000        29
                   9    22:30            -1        0          0        0

                   waf low. wkl
                   Town of Rye Salt Marshes           NAI Project #4119
                   Wallis Sands Flow Survey 1-11-11

                   DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

                   STATION TIME          DIRECTION     VELOCITY LEVELIN LEVELOUT      INVERTIN
                            1    12:25            -1      -1.1      5.01        4.8      4.11
                            1    13:16            -1      -1.2      5.01       4.78      4.11
                            1    15:10            -1      -0.8      5.01       4.75      4.11
                            1    16:40            -1     -1.25      5.01       4.73      4.11
                            1    18:10            -1           0    5.01       4.74      4.11
                            1    21:30            -1           -1   5.02       4.71      4.11
                            1    22:45            -1           -1   5.02       4.74      4.11
                            1    23:40            -1           -1   5.01       4.75      4.11
                            2    12:17            -1      -0.5      4.92        4.9      2.72
                            2    13:23            -1      -0.8      4.95       4.91      2.72
                            2    15:05            -1     -0.08      4.97        4.9      2.72
                            2    16:45            -1     -0.08      4.95        4.9      2.72
                            2    18:15            -1           0    4.95       4.92      2.72
                            2    21:25            -1     -0.01      4.95        4.9      2.72
                            2    22:50            -1     -0.07      4.95       4.92      2.72
                            2    23:35            -1           0    4.95        4.9      2.72
                         3.1     12:12              1     0.57      4.55       4.74      3.52
                         3.1     15:00            -1     -0.27      4.57       4.44      3.52
                         3.1     16:55            -1     -0.26      4.54       4.44      3.52
                         3.1     18:20            -1           0    4.51       4.44      3.52
                         3.1     21:20              1     0.28      4.49       4.44      3.52
                         3.1     22:55              1       0.6     4.55       4.54      3.52
                         3.1     23:32              1     0.01      4.56       4.49      3.52
                         3.2     12:05              1     0.08      4.44        4.6      3.92
                         3.2     13:35            -1     -0.05      4.44       4.52      3.92
                         3.2     14:55            -1     -0.14      4.56       4.52      3.92
                         3.2     17:00            -1     -0.17      4.52       4.48      3.92
                         3.2     18:25            -1           0    4.52       4.43      3.92
                         3.2     21:10            -1     -0.01      4.49       4.42      3.92
                         3.2     23:00              1     0.07      4.55       4.55      3.92
                         @3.2    23:30            -1           0    4.56       4.55      3.92
                            4    11:10              1          0    4.85       4.85      2.61
                            4    12:30            -1      -0.6      4.57       4.57      2.61
                            4    13:45            -1      -0.9      4.37       4.37      2.61
                            4    14:45            -1      -0.8      4.33       4.33      2.61
                            4    15:20            -1     -0.35      4.33       4.33      2.61
                            4    17:05            -1      -0.5      4.31       4.31      2.61
                            4    18:00            -1      -0.7      4.29       4.29      2.61
                            4    18:33            -1      -0.4      4.28       4.28      2.61
                            4    21:05              1       0.8     4.67       4.67      2.61
                            4    22:20              1       1.2     4.73       4.73      2.61
                            4    23:10              1     0.01      4.67       4.67      2.61
                                 23:30
                         4.1     11:10              1          0    4.83       4.83         0
                         4.1     12:30            -1           0    4.53       4.53         0
                         4.1     13:45            -1           0    4.53       4.53         0
                         4.1     14:45            -1           0      4.5       4.5         0
                         4.1     15:20            -1           0    4.48       4.48         0
                         4.1     17:05            -1           0    4.43       4.43         0
                         4.1     18:00            -1           0    4.43       4.43         0
                         4.1     18:33            -1           0    4.43       4.43         0

                        4.1     21:05             1          0     4.53      4.53           0
                        4.1     22:20             1          0     4.63      4.63           0
                        4.1     23:10             1          0     4.55      4.55           0
                        4.2     11:10             1          0     4.75      4.75           0
                        4.2     12:00             1          0     4.45      4.45           0
                        4.2     12:30             -1         0     4.16      4.16           0
                        4.2     13:45             @j         0     3.95      3.95           0
                        4.2     14:45             -1         0     3.87      3.87           0
                        4.2     15:20             -1         0     3.87      3.87           0
                        4.2     17:05             -1         0     3.85      3.85           0
                        4.2     18:00             -1         0     3.85      3.85           0
                        4.2     18:33             -1         0     3.85      3.85           0
                        4.2     21:05             1          0     4.36      4.36           0
                        4.2     22:20             1          0     4.75      4.75           0
                        4.2     23:10             1          0     4.25      4.25           0
                   conl         10:10             -1         0     5.97      5.97       2.76
                   conl         11:25             -1     -0.4      4.42      4.42       2.76
                   conl         12:50             -1     -0.4      3.96      3.96       2.76
                   conl         14:00             -1     -0.2      3.32      3.32       2.76
                   conl         15:30             -1         0     3.06      3.06       2.76
                   conl         17:45             -1         0     2.86      2.86       2.76
                   conl         18:45             -1         0     2.86      2.86       2.76
                   conl         19:50             1          0     3*12      3*12       2*76
                   conl         21:35             1       0.5      5.22      5.22       2.76
                   conl         22:30             -1         0      5.2       5.2       2.76
                           5    10:52             -1     -0.4      5.18      5.18        3.5
                           5    13:10             -1     -1.2       4.1       4.1        3.5
                           5    14:35             -1     -0.5       3.8      3.72        3.5
                           5    15:55             -1        -1      3.8       3.7        3.5
                           5    17:30             -1     -0.8       3.8       3.7        3.5
                           5    18:40             -1         0      3,8       3.7        3.5
                           5    21:00             -1     -0.2      4.15      4.18        3.5
                           5    22:10             1       0.1       4.7      4.71        3.5
                           5    22:40             -1        -1      4.7      4.75        3.5
                   conlO        10:30             -1     -0.93     5.42      5.42       0.96
                   conlO        11:43             -1     -1.5      4.33      4.33       0.96
                   conlO        12:59             -1     -1.5      3.84      3.84       0.96
                   conlO        14:22             -1     -0.9      3.32      3.32       0.96
                   conlO        15:43             -1     -0.52     2.98      2.98       0.96
                   conlO        17:53             -1     -0.45     2.86      2.86       0.96
                   conlO        18:45             -1         0     2.86      2.86       0.96
                   conlO        20:07             1       0.6      3.54      3.54       0.96
                   conlO        21:52             1       0.3      5.35      5.35       0.96
                   conlO        22:30             -1         0      5.2       5.2       0.96

                          11    16:05             1       1.1
                          12    16:15             1       0.5
                          13    16:30             1       1.2

                  WAQUAL.WK1         WALLIS SANDS CULVERTS
                  TOWN OF RYE SALT MARSHES
                  WATER QUALITY SURVEY 3-16-88

                  DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

                  STATION TIME        DIRECTION   TEMP       COND    SAL
                         1     12:25           -1         8         1        0
                         1     13:16           -1         9      900         0
                         1     15:10           -1         9      650         0
                         1     16:40           -1         9      700         0
                         1     18:10           -1
                         1     21:30           -1
                         1     22:45           -1
                         1     23:40           -1
                         2     12:17           -1         7         0        0
                         2     13:23           -1         9      400         0
                         2     15:05           -1         9      300         0
                         2     16:45           -1         8      200         0
                         2     18:15           -1
                         2     21:25           -1
                         2     22:50           -1         3      400         0
                         2     23:35           -1
                       3.1     12:12            1         6    20000        20
                       3.1     13:30           -1         7    12000        11
                       3.1     15:00           -1         8    14000        14
                       3.1     16:55           -1         7     5000        4.5
                       3.1     18:20           -1
                       3.1     21:20            1         5    14000        17
                       3.1     22:55            1         4    15000        16
                       3.1     23:32            1
                       3.2     12:05            1         5    15000        15
                       3.2     13:35           -1         9    10000         9
                       3.2     14:55           -1         6     8000         8
                       3.2     17:00           -1         6     4100        3.5
                       3.2     18:25           -1
                       3.2     21:10           -1
                       3.2     23:00            1         1     7000         7
                       3.2     23:30           -1
                         4     11:10            1
                         4     12:00            1         6    28000        28
                         4     12:30           -1         6    27000        27
                         4     13:45           -1         7    24000        23
                         4     14:45           -1         7    23000        22
                         4     15:20           -1       6.5    23000       22.3
                         4     17:05           -1         7    18000        17
                         4     18:00           -1         6    17000        16
                         4     18:33           -1         6    16000        15
                         4     21:05            1         5    13000        13
                         4     22:20            1         4    25000        27
                         4     23:10            1         2    25000        28
                       4.1     11:10            1
                       4.1     12:00            1
                       4.1     12:30           -1
                       4.1     13:45           -1
                       4.1     14:45           -1
                       4.1     15:20           -1
                       4.1     17:05           -1

                        4.1     18:00            -1
                        4.1     18:33            -1
                        4.1     21:05             1
                        4.1     22:20             1
                        4.1     23:10             1
                        4.2     11:10             1
                        4.2     12:00             1
                        4.2     12:30            -1
                        4.2     13:45            -1
                        4.2     14:45            -1
                        4.2     15:20            -1
                        4.2     17:05            -1
                        4.2     18:00            -1
                        4.2     18:33            -1
                        4.2     21:05             1
                        4.2     22:20             1
                        4.2     23:10             1
                          5     10:52            -1         3     24000        26
                          5     13:10            -1         3       600         0
                          5     14:35            -1         4       200         0
                          5     15:55            -1         3       150         0
                          5     17:30            -1         4       100         0
                          5     18:40            -1
                          5     21:00            -1         1       110         0
                          5     22:10             1         1       100         0
                          5     22:40            -1
                         11     16:05             1
                         12     16:15             1
                         13     16:30             1
                          5     15.55            -1         -1      4.1         4
                          5      17.3            -1       -0.8      4.1         4
                          5      18.4            -1         0       4.1         4
                          5         21           -1       -0.2     3.18      5.75
                          5      22.1             1       0.1         5      5.01
                          5      22.4            -1         -1        5      5.05
                         11     16.05             1       1.1         0         0
                         12     16.15             1       0.5         0         0
                         13      16.3             1       1.2         0         0
                  CON10         10:30            -1         4     28500      30.5
                  CON10         11:43            -1         5     30000        31
                  CON10         12:59            -1         6     27000        27
                  CON10         14:22            -1         6     22000        22
                  CONIO         15:43            -1         7     20100      19.5
                  CON10         17:53            -1         6     19000        18
                  CON10         18:45            -1
                  CON10         20:07             1         4     27000        29
                  CONIO         21:52             1         4     27000        29
                  CON10         22:30            -1

                    RYEFLOW.W`r:l        RYE HARBOR BRIDGE
                    TOWN OF RYE   SALT MARSHES         NAI PROJECT #4119
                    FLOW SURVEY   3-16-88

                    DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

                    STATION TIME          DIRECTION     VELOCITY  LEVELIN INVERTIN      H20DEPTH
                          101     09:15               1      1.38      8.37      -0.19       8.6
                          101     10:45               -1     -2.2      7.02      -0.19       7.2
                          101     12:10               -1     -2.6      3.02      -0.19 -     3.2
                          101     13:03               -1     -1.3      2.02      -0.19       2.2
                          101     13:51               -1     -1.1      1.52      -0.19       1.7
                          101     14:32               -1     -0.6      1.17      -0.19       1.4
                          101     15:35               -1     -0.6      1.02      -0.19       1.2
                          101     16:25               -1     -0.6      0.97      -0.19       1.2
                          101     17:25               -1     -0.4      0.92      -0.19       1.1
                          102     18:22               1      0.4       1.52      0.86        0.7
                          102     20:11               -1     -0.6      5.82      0.86           5
                          102     21:02               1      0.8       7.92      0.86        7.1
                          102     21:53               1      0.1       7.32      0.86        6.5
                          201     09:24               1      2.15      8.37      0.31        8.1
                          201     10:51               --1    -4.2      7.02      0.31        6.7
                          201     12:12               -1     -3.6      3.02      0.31        2.7
                          201     13:09               -1     -2.8      2.02      0.31        1.7
                          201     13:53               -1       0       1.52      0.31        1.2
                          201     14:33               -1       0       1.17      0.31        0.9
                          201     15:37               -1       0       1.02      0.31        0.7
                          201     16:27               -1       0       0.97      0.31        0.7
                          201     17:26               -1       0       0.92      0.31        0.6
                          202     18:24               1      0.9       1.52      0.11        1.4
                          202     20:14               1      1.9       5.82      0.11        5.7
                          202     21:04               1      1.9       7.92      0.11        7.8
                          202     21:54               1      0.2       7.32      0.11        7.2
                          301     09:30               1      1.9       8.37      0.41           8
                          301     10:55               -1     -4.9      7.02      0.41        6.6
                          301     12:14               -1     -3.6      3.02      0.41        2.6
                          301     13:11               -1     -2.7      2.02      0.41        1.6
                          301     13:54               -1       -2      1.52      0.41        1.1
                          301     14:35               -1     -1.7      1.17      0.41        0.8
                          301     15:38               -1       -1      1.02      0.41        0.6
                          301     16:27               -1     -1.1      0.97      0.41        0.6
                          301     17:26               -1     -0.6      0.92      0.41        0.5
                          302     18:25               1      1.5       1.52      0.11        1.4
                          302     20:16               1      2.2       5.82      0.11        5.7
                          302     21:06               1      1.8       7.92      0.11        7.8
                          302     21:55               1      0.2       7.32      0.11        7.2
                          401     09:36               1        0       8.37      @0.21       8.2
                          401     10:59               -1     -4.3      7.02      0.21        6.8
                          401     12:16               -1     -3.2      3.02      0.21        2.8
                          401     13:13               -1     -2.7      2.02      0.21        1.8
                          401     13:55               -1     -2.7      1.52      0.21        1.3
                          401     14:37               -1     -2.4      1.17      0.21           1
                          401     15:40               -1     -1.5      1.02      0.21        0.8
                          401     16:28               -1     -1.3      0.97      0.21        0.8
                          401     17:27               -1     -0.8      0.92      0.21        0.7
                          402     18:27               1      0.5       1.52      0.61        0.9
                          402     20:18               1      1.8       5.82      0.61        5.2
                          402     21:08               1      1.4       7.92      0.61        7.3
                          402     21:57               1      0.3       7.32      0.61        6.7

                        501     09:41            -1      -0.85     8.37      -0.09       8.5
                        501     11:02            -1      -4.8      7.02      -0.09       7.1
                        501     12:18            -1      -4.1      3.02      -0.09       3.1
                        501     13:15            -1      -2.9      2.02      -0.09       2.1
                        501     13:57            -1      -2.3      1.52      -0.09       1.6
                        501     14:38            -1      -2.2      1.17      -0.09       1.3
                        501     15:42            -1      -1.3      1.02      -0.09       1.1
                        501     16:30            -1      -1.4      0.97      -0.09       1.1
                        501     17:28            -1      -0.8      0.92      -0.09          1
                        502     18:29             1       0.8      1.52      0.01        1.5
                        502     20:20             1       1.9      5.82      0.01        5.8
                        502     21:10             1       1.7      7.92      0.01        7.9
                        502     21:58             1       0.2      7.32      0.01        7.3
                        601     09:45            -1      -1.7      8.37      0.81        7.6
                        601     11:04            -1          -3    7.02      0.81        6.2
                        601     12:20            -1      -2.6      3.02      0.81        2.2
                        601     13:17            -1      -0.6      2.02      0.81        1.2
                        601     13:58            -1      -0.5      1.52      0.81        0.7
                        601     14:39            -1      -0.5      1.17      0.81        0.4
                        601     15:44            -1      -0.3      1.02      0.81        0.2
                        601     16:31            -1      -0.2      0.97      0.81        0.2
                        601     17:29            -1          0     0.92      0.81        0.1
                        602     18:31             1       0.6      1.52      0.61        0.9
                        602     20:22             1          2     5.82      0.61        5.2
                        602     21:12             1       1.4      7.92      0.61        7.3
                        602     22:00             1       0.2      7.32      0.61        6.7

                  RYEQUAL.WK1         RYE HARBOR BRIDGE
                  TOWN OF RYE SALT MARSHES          NAI PROJECT #4119
                  WATER QUALITY SURVEY 3-16-88

                  DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

                  STATION TIME         DIRECTION    TEMP     COND      SAL
                        100     09:15            1       3.25    28900      30.5
                        100     10:45            -1      4.1     29100        30
                        100     12:10            -1      5.4     28600      28.8
                        100     13:03            -1         6    25300      24.1
                        100     13:51            -1      6.9     22200      20.6
                        100     14:32            -1      6.8     19700      18.3
                        100     15:35            -1         7    17400        16
                        100     16:25            -1      5.9     14900      14.1
                        100     17:25            -1      5.9     12900      11.9
                        100     18:22            1          5    19000        18
                        100     20:11            -1      3.1     28900        31
                        100     21:02            1          3    28900        31
                        100     21:53            1          3    29000        31
                        200     09:24            1          3    28900      30.8
                        200     10:51            -1         4    29100      30.4
                        200     12:12            -1      5.4     28600      28.5
                        200     13:09            -1      5.8     25200      24.3
                        200     13:53            -1         0        0         0
                        200     14:33            -1         0        0         0
                        200     15:37            -1         0        0         0
                        200     16:27            -1         0        0         0
                        200     17:26            -1         0        0         0
                        200     18:24            1       4.8     24900      24.5
                        200     20:14            1          3    28900      31.1
                        200     21:04            1          3    29000        31
                        200     21:54            1          3    29000      31.1
                        300     09:30            1          3    28900      30.7
                        300     10:55            -1         4    29200      30.4
                        300     12:14            -1      5.2     28600      28.8
                        300     13:11            -1      5.8     25100      24.6
                        300     13:54            -1      6.6     22000      20.8
                        300     14:35            -1      6.8     19500      18.1
                        300     15:38            -1      6.5     17200      15.9
                        300     16:27            -1      5.9     14800      13.9
                        300     17:26            -1      5.4     12600      11.8
                        300     18:25            1       43      26000      26.1
                        300     20:16            1          3    29000        31
                        300     21:06            1          3    28900        31
                        300     21:55            1       2.9     29000      31.4
                        400     09:36            1          3    28900      30.8
                        400     10:59            -1      4.1     29100      30.4
                        400     12:16            -1      5.1     29600      28.7
                        400     13:13            -1      5.9     25000      24.2
                        400     13:55            -1      6.7     21900      20.4
                        400     14:37            -1      6.8     19400        18
                        400     15:40            -1      6.3     17000      15.9
                        400     16:28            -1         6    14800      13.9
                        400     17:27            -1      5.3     12500      11.7
                        400     18:27            1       4.5     26000      26.1
                        400     20:18            1          3    29000      31.1
                        400     21:08            1       3.1     28900      30.9
                        400     21:57            1       2.9     29000      31.5

                       500    09:41           -1         3    28950      30.9
                       500    11:02           -1       4.2    29100      30.3
                       500    12:18           -1       5.1    28600      28.7
                       500    13:15           -1       5.9    25000        24
                       500    13:57           -1       6.8    21900      20.4
                       500    14:38           -1       6.8    19400        18
                       500    15:42           -1       6.2    16900      15.8
                       500    16:30           -1         6    14700      13.8
                       500    17:28           -1       5.2    12400      11.6
                       500    18:29            1       4.3    27100      27.8
                       500    20:20            1         3    29000      31.1
                       500    21:10            1       3.2    28700      30.7
                       500    21:58            1       2.9    29000      31.4
                       600    09:45           -1         3    29000        31
                       600    11:04           -1       4.2    29200      30.2
                       600    12:20           -1       5.2    28600      28.6
                       600    13:17           -1       5.9    24900      24.1
                       600    13:58           -1       6.8    22000      20.8
                       600    14:39           -1       6.7    19700      18.3
                       600    15:44           -1       6.3    16900      15.8
                       600    16:31           -1       5.8    14600      13.8
                       600    17:29           -1         0         0         0
                       600    18:31            1       4.2    27000      27.5
                       600    20:22            1         3    29000        31
                       600    21:12            1       3.1    28700      30.7
                       600    22:00            1       2.9    29000      31.6

                  PHILFLOW.WK1         PHILBRICK CULVERTS
                  TOWN OF RYE SALT MARSHES          NAI PROJECT #4119
                  FLOW SURVEY 3-16-88

                  DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVIEW

                  STATION TIME          DIRECTION    VELOCITY LEVELIN LEVELOUT      INVERTIN  INVERTOUT
                         10     10:23             1       2.3      5.43      5.45      2.97          2.98
                         10     11:25            -1      -2.1      5.33      5.33      2.97          2.98
                         10     12:43            -1      -1.7      4.98      4.79      2.97          2.98
                         10     13:35            -1      -1.7      4.64      4.45      2.97          2.98
                         10     14:18            -1      -1.3      4.36      4.22      2.97          2.98
                         10     14:54            -1        -1      4.14      4.03      2.97          2.98
                         10     16:00            -1      -0.7      3.88      3.81      2.97          2.98
                         10     16:47            -1      -0.4      3.75      3.73      2.97          2.98
                         10     17:45            -1      -0.6      3.73      3.68      2.97          2.98
                         10     18:53            -1      -2.7      3.68      3.63      2.97          2.98
                         10     20:41             1       2.6      4.13      4.18      2.97          2.98
                         10     21:29             1          3     4.78      4.83      2.97          2.98
                         10     22:22             1       0.8      5.05      5.03      2.97          2.98
                         11     10:32             1       0.8      5.45      5.55      4.22          4.37
                         11     11:32            -1      -0.4      5.43      5.45      4.22          4.37
                         11     12:48            -1      -0.6      5.11      5.07      4.22          4.37
                         11     13:41            -1      -0.3      4.85      4.75      4.22          4.37
                         11     14:24            -1      -0.2      4.72        4.5     4.22          4.37
                         11     15:00            -1      -0.1        4.7     4.25      4.22          4.37
                         11     16:07            -1      -0.1        4.7     4.01      4.22          4.37
                         11     16:53            -1      -0.01     4.65      3.95      4.22          4.37
                         11     17:51            -1      -0.2      4.65      3.93      4.22          4.37
                         11     19:10            -1      -0.01     4.56      3.92      4.22          4.37
                         11     20:50            -1      -o.i      4.65      4.15      4.22          4.37
                         11     21:35             1       0.2        4.7     4.72      4.22          4.37
                         11     22:30             1       0.2      5.05        5.1     4.22          4.37
                          7     09:57            -1      -0.5      5.66      5.65     -0.57         -0.44
                          7     11:11            -1      -0.3      5.28      5.27     -0.57         -0.44
                          7     12:27            -1      -0.8      0.88        0.9    -0.57         -0.44
                          7     13:21            -1      -0.4      0.28      0.29     -0.57         -0.44
                          7     14:05            -1      -0.5      0.18      0.25     -0.57         -0.44
                          7     14:43            -1      -0.5      0.18      0.25     -0.57         -0.44
                          7     15:47            -1      -0.25     0.18      0.25     -0.57         -0.44
                          7     16:34            -1      -0.1      0.18      0.25     -0.57         -0.44
                          7     17:33            -1      -0.6      0.18      0.25     -0.57         -0.44
                          7     18:37            -1      -0.2      0.18      0.25     -0.57         -0.44
                          7     20:25             1       0.5      3.88      3.95     -0.57         -0.44
                          7     21:15             1       1.4      4.78      4.88     -0.57         -0.44
                          7     22:06             1       o.4      4.98      5.05     -0.57         -0.44
                        300     09:30             1       1.9      6.16      6.16      -2.1          -2.1
                        300     10:55            -1      -4.9      4.81      4.81      -2.1          -2.1
                        300     12:14            -1      -3.6      0.81      0.81      -2.1          -2.1
                        300     13:11            -1      -2.7     -0.19     -0.19      -2.1          -2.1
                        300     13:54            -1        -2     -0.69     -0.69      -2.1          -2.1
                        300     14:35            -1      -1.7     -1.04     -1.04      -2.1          -2.1
                        300     15:38            -1        -1     -1.19     -1.19      -2.1          -2.1
                        300     16:27            -1      -1.1     -1.24     -1.24      -2.1          -2.1
                        300     17:26            -1      -0.6     -1.29     -1.29      -2.1          -2.1
                        300     18:25             1       1.5     -0.69     -0.69         -2           -2
                        300     20:16             1       2.2      3.61      3.61         -2           -2
                        300     21:06             1       1.8      5.89      5.89         -2           -2

                         300    21:55             1       0.2      5.29      5.29          -2            -2
                          8     10:03             1       0.8      5.97      5.97       1.37         1.61
                          8     11:14            -1      -4.7      4.59      4.08       1.37         1.61
                          8     12:33            -1      -3.5      3.69      3.28       1.37         1.61
                          8     13:27            -1      -2.6      3.44      3.16       1.37         1.61
                          8     14:09            -1      -2.7      3.28      3.08       1.37         1.61
                          8     14:48            -1      -2.3      3.14      2.88       1.37         1.61
                          8     15:52            -1      -1.8      2.99      2.78       1.37         1.61
                          8     16:38            -1      -1.7      2.89      2.78       1.37         1.61
                          8     17:37            -1      -1.1      2.86      2.73       1.37         1.61
                          8     18:45            -1      -1.4      2.84      2.73       1.37         1.61
                          8     20:32             1       0.8      4.19      4.18       1.37         1.61
                          8     21:22             1       1.4      5.09      5.03       1.37         1.61
                          8     22:12             1       0.5      5.23      5.18       1.37         1.61
                          9     10:14             1       1.9      5.45      5.68       2.87         2.39
                          9     11:22            -1      -2.8      5.18      4.58       2.87         2.39
                          9     12:38            -1      -1.6      4.79      3.73       2.87         2.39
                          9     13:32            -1      -1.5      4.45      3.48       2.87         2.39
                          9     14:15            -1         -2     4.22      3.28       2.87         2.39
                          9     14:51            -1      -1.7      4.03      3.18       2.87         2.39
                          9     15:58            -1      -0.8      3.81      2.98       2.87         2.39
                          9     16:45            -1      -1.3      3.73      2.88       2.87         2.39
                          9     17:42            -1      -1.1      3.68      2.83       2.87         2.39
                          9     18:49            -1      -1.2      3.63      2.83       2.87         2.39
                          9     20:38             1       2.1      4.18      4.28       2.87         2.39
                          9     21:27             1          2     4.83      5.03       2.87         2.39
                          9     22:20            -1      -0.1      5.03      5.08       2.87         2.39

                  PHILQUAL.WK1        PHILBRICK CULVERTS
                  TOWN OF RYE SALT MARSHES         NAI PROJECT #4119
                  WATER QUALITY SURVEY 3-16-88

                  DRAFT FOR REVIEW ONLY - DATA SUBJECT TO REVISION

                  STATION TIME         DIRECTION   TEMP      COND     SAL
                         10     10:23            1      3.9     29000      31.1
                         10     11:25           -1      4.5     29000      29.6
                         10     12:43           -1      5.5     28100        28
                         10     13:35           -1        6     24100      21.1
                         10     14  :18         -1        6     17800      16.9
                         10     14:54           -1        7     15000        12
                         10     16:00           -1      5.5     10100       9.5
                         10     16:47           -1        5      8900       8.2
                         10     17:45           -1      3.2      7400       7.2
                         10     18:53           -1        2      5000         7
                         10     20:41            1      2.5      2100         2
                         10     21:29            1        3     22500      28.8
                         10     22:22            1        3     26000      27.6
                         11     10:32            1        4     16500        17
                         11     11:32           -1      5.2     17400      17.3
                         11     12:48           -1        5          9      8.5
                         11     13:41           -1      5.8      6100       5.5
                         11     14:24           -1        5      6600         5
                         11     15:00           -1      5.8      5000       4.2
                         11     16:07           -1        3      3300       3.1
                         11     16:53           -1        3      3100       3.3
                         11     17:51           -1        2      3000       3.1
                         11     19:10           -1        2      2600         3
                         11     20:50           -1        1      2900       2.8
                         11     21:35            1      1.5      3000         3
                         11     22:30            1        1      3700       3.5
                          7     09:57           -1      3.@     29000      30.9
                          7     11:11           -1        5     30000        31
                          7     12:27           -1      6.9     22700      21.1
                          7     13:21           -1      6.9     20000      18.6
                          7     14:05           .-l     6.5     19400      18.1
                          7     14:43           -1      6.1     19200      17.1
                          7     15:47           -1      5.5     19000      18.1
                          7     16:34           -1      4.9     19800        17
                          7     17:33           -1        4     18000      17.3
                          7     18:37           -1        4     18000      16.9
                          7     20:25            1        4     28900      29.5
                          7     21:15            1        3     29000      30.4
                          7     22:06            1        3     29000      30.6
                          8     10:03            1      3.4     28750      30.9
                          8     11:14           -1      4.7     26500      27.8
                          8     12:33           -1      5.9     22000      21.2
                          8     13:27           -1      5.9     17900        17
                          8     14:09           -1      6.4     15000      13.8
                          8     14:48           -1        7     12700      11.2
                          8     15:52           -1      5.2      8100       7.3
                          8     16:38           -1        5      5800         5
                          8     17:37           -1      4.1      4000       3.8
                          8     18:45           -1        4      2700         3
                          8     20:32            1      3.5     27000        28
                          8     21:22            1      3.5     28100        30
                          8     22:12            1        3     28600      30.5

                         9     10:14            1         4    28900        31
                         9     11:22           -1       4.8    28900      29.5
                         9     12:38           -1       5.6    25800      25.1
                         9     13:32           -1       6.2    20700      19.2
                         9     14:15           -1         6    18100      16.9
                         9     14:51           -1       6.2    14700      14.5
                         9     15:58           -1       5.3     9000       8.1
                         9     16:45           -1         5     6000       5.3
                         9     17:42           -1       4.5     3100       3.2
                         9     18:49           -1       2.9     2000       2.6
                         9     20:38            1         1    10000       8.1
                         9     21:27            1         3    26200        28
                         9     22:20           -1       3.6    27100      28.5
                       300     09:30            1         3    28900      30.7
                       300     10:55           -1         4    29200      30.4
                       300     12:14           -1       5.2    28600      28.8
                       300     13:11           -1       5.8    25100      24.6
                       300     13:54           -1       6.6    22000      20.8
                       300     14:35           -1       6.8    19500      18.1
                       300     15:38           -1       6.5    17200      15.9
                       300     16:27           -1       5.9    14800      13.9
                       300     17:26           -1       5.4    12600      11.8
                       300     18:25            1       4.5    26000      26.1
                       300     20:16            1         3    29000        31
                       300     21:06            1         3    28900        31
                       300     21:55            1       2.9    29000      31.4

                                                                                                                                          NOAA COASTAL SERVICES CTR LIBRARY

                                                                                                                                          3 6668 14111757 4

    AL