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LEWIS ROAD / MD 611 DRAINAGE STUDY Worcester County, Maryland KEY MAP D 00 mc r MALLARD %Y 528 7 7 oz, Colla No ays nor pt. @Zl' 'q"Yshore THEP OC" Acres 0449. of A., 9, 611 0 4 1 A Ocean C SinePuxent inlet 5 H. 00 S119POINT mysti 0CEA'v Narbourf +\ 6 off, Snug IffI V Lew arbor A Corne 'j CD "Ay A. ROUTE 1, BOX 780 MARIDELA SPRINGS, MD 21837 FUNDING FOR THE LEWIS ROAD/MD 611 DRAINAGE STUDY WAS MADE POSSIBLE BY THE COASTAL RESOURCES DIVISION, MARYLAND DEPARTMENT OF NATURAL RESOURCES THROUGH A GRANT PROVIDED BY THE COASTAL ZONE MANAGEMENT ACT OF 1972 AS ADMINISTERED BY THE OFFICE OF OCEAN AND COASTAL RESOURCE MANAGEMENT, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION (NOAA) THE VIEWS, OPINIONS, OR POLICIES EXPRESSED HEREIN ARE THOSE OF THE AUTHORS AND DO NOT NECESSARILY REFLECT THE VIEWS, OPINIONS OR POLICIES OF THE WORCESTER COUNTY COMMISSIONERS, THE DEPARTMENT OF NATURAL RESOURCES OR NOAA IEWIS ROAD/MD RaM 611 EPAINMM STUDY TABIE OF CCNTENTS TOPIC PAGE S=ary 1-2 Introduction Purpose Of Study 3 Authority For Study 3 Funding For Study 3 Nature Of Study 3 Description Of Drainage Study Area Physical Data 4-5 Land Use 5 Aquatic Resources 8 Wildlife Resources 8 Wetland Resources 8-9 Cultural Resources 9-11 Endangered And Threatened Plants And Animals 11 soils 11-12 Drainage Existing Drainage Problems 26 Floodwater Damage 27 Problems Related To Water Management 27-28 Erosion Damage 28 Sediment Damage 28 Drainage Problezns 28-34 Stream Classification 36 Chemical Water Quality 36 Geological Investigation 37 Engineering 37-38 Drainage Solutions 38-40 Other Areas Of Concern Aquifers 47 Sewage Disposal General 47-48 Bermed Infiltration Ponds 48-49 Design Criteria 49 Soils - Profile Description 49 Size Requirements 49 Cost Of Bermed Infiltration Ponds 50 Summary Of Findings 50 Sand Mound System 50 Conventional Gravity Trench 51 Inj ection Systein 51 Central Water and Sewage System 51-52 LEWIS ROAD/MD ROUTE 611 DRAINAGE STUDY TABLE OF CONTENTS (CONT) TOPIC PAGE Stormwater Management 57-59 Recreation 62 Ocean City Airport 63-67 Utilities, Roads, Service 73 Funding and Technical Assistance 74 Property Ownership 75-89 Recormendations/Conclusions For Consideration 90-91 Listing of Abbreviations Acknowledgements 93 EXHIB= AM FIGUEM IMMIT NO. NAME PACE 1 Land use (Existing) 6 2 Land Use (Potential) 7 3 Cultural Resource 10 4 Hydric - Non-Hydric soils 13 4a Hydric Soil Map 14 5 Description of Hydrologic Soil Group 15 6 Estinated Engineering Properties of Soils 16-17 7 Soil Limitations For Selected Uses 18-19 8 Estimated Engineering Interpretations 20-22 9 Soil Limitations for Specified Recreational Uses 23-25 10 Sub-Watershed Area Map 35 11 Study Area Without Irproved Drainage Systems For Non-Developed And Fully Developed Conditions 41 12 Rainfall Amount Which Will Cause Flooding (Undeveloped) With Existing Drainage in 24 Hours 42 13 Rainfall Amount Which Will Cause Flooding (Fully Developed) With Existing Drainage in 24 Hours 43 14 Fully Developed Q (CFS) For 10 Year Storm 44 15 Recomnended Channel Design Criteria 45 16 Channel Inprovement Needs By Sub Watershed With Estinated Cost And Party Responsibility 46 17 Sununary of Stormwater Detention Storage 60 18 Schematic Peat-Sand Filters 61 19 Airport Land Use Guidance Zones (LUG) 68 20 Airport (Noise Sensitivity Criteria) 69 21 Airport (Noise Sensitivity Criteria) 70 22 Obstructions (Runway 14-32) 71 23 Obstructions (Runway 1-19) 72 FICURE NO. 1 Bermed Infiltration Pond Design 53 2 Typical Four-Comparbnent Septic Tank 54 3 Typical Buried Intermittent Filter Installation 55 4 Bermed Infiltration Pond Concept 56 MAP NO. 1 Wetlands Map Pocket 2 Approach Slopes Map Pocket 3 Iand Ownership Map Map Pocket The Lewis Road/MD 611 study area is south of Route U. S. 50 and bound on the east by Route MD 611, on the south by MD, 376, on the west by Ayer Creek and on the north by the lands of Historic Railroads, Inc.. The area is approximately 1302 acres of which 931 acres are wood land and 371 acres are open land. Approximately 77 percent of the land is poorly drained. This study was undertaken to inventory existing drainage and stormwater problems in the study area and to evaluate impacts of development on existing drainage systems. Due to the proximity of Ocean City and based on rapid development patterns within the area, it is project that this area could be fully developed by the year of 2005. Fully developed is defined in this report as 48 percent impervious surface area. The Worcester County Stormwater Management Code states that any development would have to store the difference between the 2 year pre condition and the 10 year post condition storm runoff.' This would require 72 acre feet of storage either on site or off site. The facilities could be shared by mAtiple developuents. The existing drainage channels have deteriorated aver the years due to age and lack of maintenance. To correct this problem, it is reccmrerxied that the watersheds organize Public Drainage Association (P.D.A.s) or Public Watershed Associations (P.W.A.s). By us ing either association, the owners will have a maintenance plan developed with assistance from, the U.S. Department of Agriculture and the Maryland Department of Agriculture. At present, the Ocean City Airport is limited as to the type of aircraft landing at the facility. Predicted population growth and airport usage may dictate airport e)@pansion, namely, runway lw)gth- Runway e>qpansion would require -1- acquisition of additional land, relocation of MD 611 and land use zoning to protect the public as well as the airport. Consideration should be given to total relocation of the airport and use existing area for recreation, ocean City services or a multi-purpose complex. Sewage disposal is of major concern with developing areas and extremely important in this study area with soils that are not adapted for this use. Several alternative on-site systems are discussed in this report, but a central water and sewage disposal system should be given strong consideration. -2- MU=CK PIMPOSE OF STUDY r1he purpose of this drainage study is to assess existing drainage problems and the impact of existing and future development on the Lewis Road/MD Rt. 611 area wate=-hed. Data assembled and recommendations presented in study are for the expressed purpose of formalating regulations or policy measures to assist in land use decisions. A=O= FOR SWDY Worcester County Commissionexs =ING FOR SWDY Funding for the lewis Road/MD Rt 611 drainage study was made possible by the Coastal Resource Division, Maryland Department of Natural Resources through a grant provided by the Coastal Zone Management Act of 1972 as administered by the office of Ocean and Coastal Resource Management, National Oceanic and Atmospheric Administration. NA= OF SUMY This study reviews water and related land resources to meet present and future needs of the area. It suggests certain alternatives for achieving orderly and beneficial utilization, development and conservation of these resources. Specific evaluations were made for flooding, wetlands, drainage, soils, airport area and waste disposal. -3- IRIPTION OF THE ERAINAGE SI= AIZEA PHYSICAL DATA The Lewis Road/MD Rt. 611 drainage area is bound on the north by the lands of Historic Railroads, Inc. ; on the east by MD Rt. 611; on the south by MD Rt. 376; and on the west by Ayer Creek, approximately 5000 feet, and then in a northerly direction to Herring Creek at Historic Railroad, Inc. (See Map No. 1, Map Pocket). The total drainage area is approximately 1302 acres in which 931 acres are wood land and 371 acres open land. Open land being defined as crop land, house lots, and idle land. Soils in the study area are of coastal plain origin and approximately 77 pexrRnt are poorly drained. The open land soils being used for agricultural purposes are suitable when managed. other intended purposes such as conmercial, etc are discussed later in this report. Precipitation averages about 43 inches annually and is fairly evenly distributed through the year with a maximm expected in August and a minimum in October or February. Heavy rains durirxg the colder half of the year are usually from low pressure systems moving north or north easterly along the coast. In =mer, heavy rains occur mostly an thunderstorms, tropical storms or hurricanes. Thunderstorms occur on an average of 30 days a year with 77 percent of these from May through August. Tropical storms or hurricanes affect the area about once a year, usually between July and November. Many of these cause minor damage through heavy rainfall, strong winds and high tide. Average annual temperature is about 58 degrees F. February has the lowest monthly average at 39 degrees F. And July has the highest at 78 degrees F. -4- The major water use in the study area is for domestic purposes and a small number of commercial establishments. At present, most of their needs are satisfied by individual wells. IAND USE In the study area, approximately 931 acres are wood land and 371 acres are open land. The open land consists of 250 acres being cultivated and 121 acres being home steads, commercial use or idle. Of the total of 1302 acres, approximately 23 percent is non-hydric soils and approximately 77 percent is hydric soils. With development of most of the land on the island of Ocean City in the past two decades, West Ocean city is rapidly developing to accomuLodate the overflow. The area between U.S. Rt. 50 and Sunset Avenue is experiencing rapid growth which includes service and supply oriented businesses along with residential (condos). East of the study area and MD Rt. 611, there is the residential development of Mystic Harbor, Ocean City Airport facility, Eagles Nest Mobile Home Park and Campground, Eagles Landing Golfcourse (Town of Ocean City), Frontiertown, Snug Harbor, Assateaque Point Campground Subdivision and The Iandings (in planning). On the west side of MD Rt. 611 and in the study area, there is a multi sales/service area, South Point Tennis Club, Real Estate Office, two produce stands, trailer court, service station and Berlin Fire Company building 'and numerous single-family residences. It appears that some expansion is directed in a southerly direction. The pressures of growth may necessitate that the study area be considered as a potential multi-purpose growth area. The Worcester County Comprehensive Development Plan identifies the study area as suburban residential, which is moderate-density residential, suburban commercial, cluster developments -5- 77037.4, 564620 3 17' -- ------- ._-g FMMTrY-PHILADELPHIA TRUST M otal 9W 00 A. 4 -kw 4n 94 A ".f :.,a,/ P120 Ali ..j ;+ 933/524 P.M, I. off/ DONALD ft. FISHER 9 116-34A. It 322 I- see PISS t mzi P 3" R ml ise c so, Afte"I"Reft"ur 41" 011jr- A INS 4, of" AX'N I S.r .00(m mi@ X8,614.0' Vo. w k IS$ r2 W Its. R'NP P30 owffr." "2 Isle SO SO SAtPAM T 'tT"An VER now J. PATTO" ESTAL ll.Y/522 lb 95.90A. N, K\; P.M X54. IN 0 M @rsc I@smsssxmcc- C. SO Nr /103 MA o" F OICITYCOL J. A" CITY P31 221/101 N rl\ R271 is. 4. 13611376 r.%M 43.31A. Pan FAR I @js 221417 P347 36.04A. 0.254 I @AP ft r 'a' MWAPSS-Oj OVA is -m Is, 'a MAP It I 'a Piz* 1 -1.1. A# R817 4- "P.W. p $so p .0.1.0 vc -11.4it4l "T H. 4 BIRCH 52, f Ils 101 IL Al uwto Also FILIL A X\ Me Swiss' P.1lip 044- % P. A S@Ad A. "Aff TV V 33 I.14T I"..! 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Y.1 is .000 93 R143 A 164 ZZ:__ zzi_ Z*z uwgo An ITY153% PAR. % 000 Pill A N 315 zzt% A A WI0A1.f; Am* Als lz FAA. -AA AS -mi, It 3.4 A 14T PA. A 1.0 P22 P As A 139 R332 A14 Age 8139 ol III- A. A, 4 1 N A., .4 x to au. All CRE K peg _N A to AS AT kQM POINTE, INC. 54.11A. I 13/130 or V; p @1, A yw "m i . P. ISz A p 04 AIX,. X4 'e's, Paz MPAM T1144 P.93 It 1" -1. 110,41 19 Volk a sak (Exhibit 1, Page 6 is the Existing Zoning Map and Exhibit 2, Page 7 is the proposed Land Use Map.) AQUATIC RESOURCES The aquatic systems directly affected by the study area are Sinepuxent Bay, Ayer Creek and Herring Creek which indirectly affect tributaries and bodies of water downstream. Som fish that inhabit these creeks are brown bullhead, banded killifish, golden shiner, bluegill, white perch, mullet, carp, needlefish, american eel, anchovy and bluefish (information obtained from report made by Allen Wesche, Natural Resource biologist of the Department of Natural Resources Tidewater Fisheries Administration) WIT DI FE RFZ CURCES Primary terrestrial habitat is the edges of the woodlands. rnie major forest association in the area is sweet gurn - red maple and oak - pine. The wildlife species associated with this habitat include whitetail deer, gray squi]rrel , cotton tail rabbits, quail, raccoons, opossum, various song birds and small mammals, such as, field moles, shrews, starnose moles and chipmunks. WErLAND PZ13OURCES Several areas are designated as wetlands on the N.W.I. and Md. D.N.R. wetland raps. These areas are shown on Map No. 1, (Map Pocket) . Wetlands Map No. 1 was defined by use of the Federal Manual for Identifying and Delineating Jurisdictional Wetlands (dated January, 1991 by F&WS, SCS, EPA and ACE) as areas which possess hydric soils, hydrophytic vegetation and wetland hydrology (saturated condition). Presently there is a legislative mandate for "No net loss" of non-tidal wetlands. Mitigation of any wetlands lost is necessary in replacement ratios in the range of 1:1 to 3:1. (acreage replacement to acreage lost). certain enhancement activities such as rehabilitation of stream channels, wildlife ponds, man made wetlands (reverse berms on ditches and flood stage weirs), may be considered as wetland mitigation. The wetlands identified in this area are classified, according to Cowardin nomenclature, as palustrine forested, broad-leaved deciduous, teqmrarily flooded and palestine, scrub/shn3b, deciduous, sea onally well drained. CULTURAL RESOURCES With respect to archaeology, there appears to be no historic sites within the study area, except for two historic cemeteries (Exhibit 3, Page 10). However, given the size of the study parcel and the presence of substantial water resources (Ayer Creek, Herring Creek, and marsh), much of this land has a high potential for containing archaeological sites. This assessment is based on the environmental, settings of known archaeological sites in other parts of the Delmarva Peninsula. Particularly sensitive areas for prehistoric and historic archaeological settlements would be knolls or sections of relatively higher elevation adjacent to water. Prehistoric/historic Site 18WO151 and historic Site 18WO122 are located in these settings within a 2 mile radius of the study area. Archaeological resources might also be found along older roads in the study area. It is reconmended that an archaeological reconnaissance survey be conducted of the study area to identify its archaeological resources and determine their eligibility for the National Register of Historic Places. The survey should be conducted by a qualified professional archaeologist and conducted in accordance with the "Guidelines for Archaeological Investigations in Maryland" (McNamara, -9- Tc, (VV c BM r- AB DOD UM At- -rimo,@E Xl@ .4t/ 0 it it /0 611) u railer 0 A. Park 040 13. e nj ce JiLed Ar un 1), 'Air 'o 0 (@l A A(A I r A RP STUDY AqEA, 0 tJoh 10 Or Cirn Light Coffins -,@7 w pt/ IV Cem PO L ght m 3 0 Park Tidal Flat, r 6@ ewis C 1c, Legev CEMETEKY M.D.O.T. SU RVE Y EXHIBIT 3 mmm 041 @Al D @A I- "r, 410E @-@/ays Point 1981). No survey would be necessary for the 0.5 mile long segment of Route 611 at the southeastern end of the study area (Exhibit 3, Page 10); a survey of this land was conducted by Wesler et al. in 1981 for the Maryland Department of Transportation. If significant sites are located within the study area, Worcester County would be encouraged to preserve them in place, or to recover the important archaeological data prior to any disturbance. If the study area entails any involvement from a federal agency (including funding, permits, or licenses), it would be subject to review under Section 106 of the National Historic Preservation Act of 1966, as amended. This historic presexvation law requires that the involved governmental agency consider the effects of the proposed project on significant cultural resources. ENDANGERED AND THREATENED PLANTS AND ANIMALS No federal or state threatened or endangered plant or wildlife species have been identified in the watershed except for the transitory use by Bald Eagles. SOILS The soils in the study area are conposed of the Fallingston, Fort Mott, Lakeland, Leon, Mattapex, Othello, Pocanoke, Portsmouth, Sassafras and Woodstown series. Exhibit 41, Page 13 and Exhibit 4a, Page 14 groups soils as hydric or non-hydric and lists soil map symbol, soil name and hydrologic soil group. Exhibit 5, Page 15 is a description of each hydrologic soil group. The Fallingston, Leon, Othello, Pocomoke and Portsmouth are considered poorly drained soils and occur in wooded, lowland areas and pockets throughout the study area. These soils have high water tables which severely limit their usage. The Woodstown, Sassafras, Fort Mott and Mattapex soils are moderately-well to well drained. Seasonable high water table in Woodstown and Mattapex soils create moderate limitations for farming and most non-agricultural uses. Sassafras and Fort Mott soils have lower water tables which present no apparent problem. The Lakeland. soils consist of fairly level, deep, excessively drained sandy soils with sare limitations on certain proposed uses, such as drain fields or lagoons. Exhibit 6, Pages 16-17, Estimated Engineering Properties of Soils; Exhibit 7, Page 18-19, Soil Limitations For Selected Uses; Exhibit 8, Page 20-22, Estimated Engineering Interpretations; Exhibit 9, Page 23-25, Soil Ldmitations For Specified Recreational Uses indicate properties of the soils and the influence of those properties or problems related to development of these soils. Approximately seventy-seven percent of the study area is classified as hydric soils as defined by the Food Security Act of 1985. Highly erodible soils represents 0.3 percent and prime fam land represents 10.7 percent of the site. The following is a chart showing hydric and non-hydric soils by present and proposed land use: TOTAL ACREAGE OF. ACREAGE OF ZONING ACRES HYDRIC SOIL NON-HYDRIC SOIL R:--l 108 30 78 B-2 81 54 27 M-1 9 4 5 B-1 20 8 12 R-3 42 39 3 Agriculture 958 804 154 Proposed Parks 41 37 4 Proposed Waste Disposal 43 34 9 TOTAL 1302 1010 292 It is notable that approximately 77 percent of soils in the study area are hydric and changes in land use which increases irpervious area will likely ccnVound the already existing wetness. -12- SOILS FROM WORCESTER COUNTY SOIL SURVEY MAP HYDROLOGIC SYMBOL MAPPING UNIT SOIL GROUP HYDRIC SOILS Fa Fallsington Sandy Loam D Fg Fallsington Loam D Lis Leon Loamy Sand D Ot Othello Silt Loam D Pk Pocomoke Sandy Loam D PM Pocomoke Loam Pt Portsmouth Silt Loam D NON-HYDRIC SOILS FmB Fort Mott Loamy Sand, 2 - 5 percent slopes B LmB Lakeland Loamy Sand, Clayey Substratum, 0 - 5 percent slopes A MoA Mattapex Fine Sandy Loam, 0 - 2 percent slopes C MpA Mattapex Loam, 0 - 2 percent slopes C SaA Sassafras Sandy Loam, 0 - 2 percent slopes B SaB2 Sassafras Sandy loam, 2 - 5 percent slopes, moderately eroded B WdA Woodstown Sandy Loam, 0 - 2 percent slopes C WdB Woodstown Sandy Loam, 2 - 5 percent slopes C WoA Woodstown Loam, 0 - 2 percent slopes C WoB Woodstown Loam, 2 - 5 percent slopes C Exhibit 4 -13- P.F., " SaB2, Fa- F9 7-7, V B V40 pm "A t Ap'132 6 WdA j/.f 4.. tv- A S21A p N., Pi 1-.1' Fa .1Z. W, , 1-02 Pt Z 'Ot. A I 7@ 4, llc@,%i;"". v W 7- A, Ic Ft .0, s '7. F y y. @dA VWdA,. % Dt MoA .H WdA Fa _.7,7 V KY+ t vy d INK-. XT EASTERN IMORE.'. It Pk Pk PI 4 J,p M,' Fa Pm MO F, p /P@ trne Fa F a Fa r A B @k' "WOA a ra. n,' F WdA A Pkjj-@ I.: 91 _J:,, Fz p y ux 11 b Fa b Fa VvoA Fa Pnl Gb G @l Fa Fa OCFAN Ci SaP2 Sao, W F 02 6B VI u < - _ffc WdA JA L -F@ ,@4 vvdA at 6 VA A poil t F@ T Z) -T .%,<dA 4,--, A W9. F., .; 11: L. Fa 11-7 2 2 Mp UP - P;q rm @71 2 WCIA @F A, I dA dA Tn Ti. Fg. %! TA )MUM, I 0@ MpA MdB Fg t Fg/. -7 Sao T @M. s rn WdA SaU2 7, BYERDIDGIC SOIL CF40UPS MU)MON Each soil is placed into one of four groups according to the rate of surface infiltration of'water when the entire soil is thoroughly wetted. Infiltration under thoroughly wetted conditions is correlated positively with internal transmission of water, and thus negatively with runoff potential. Infiltration and transmission of water is not the same as permeability. For instance, a rapidly permeable soil, such as Plummer, will have a very slow infiltration and transmission rate when thoroughly wetted because of a stagnant water table. Descriptions of the different hydrologic soil groups are as follows: Group A --- Soils having high infiltration rates even when thoroughly wetted, consisting chiefly of deep, well to excessively drained sands and/or gravels. These soils have a high rate of water transmission and would result in a low runoff potential. Group B --- Soils having moderate infiltration rates when thoroughly wetted, consisting chiefly of moderately- well to well-drained soils with moderately fine to moderately coarse textures. These soils have a moderate rate of water transmission and a moderate runoff potential. Group C --- Soils having a slow infiltration rate when thoroughly wetted, consisting chiefly of (1) soils with a layer that impedes the downward movement of water, or (2) soils with moderately fine to fine texture and a slow infiltration rate. These soils have a slow rate of water transmission and a high runoff potential. Group 1) --- Soils having very slow infiltration rates when thoroughly wetted, consisting chiefly of (1) clay soils with a high swelling potential, (2) soils with a high permanent water table, (3) soils with claypan or clay layer near the surface, and (4) shallow soils over nearly inpervious materials. These soils have a very slow rate of water transmission and a very high runoff potential. Exhibit 5 -15- Soils ESTIMATED ENGINEERING PROPERTIES OF THE SOILS FROK WORCESTER COUNTY SOIL SURVEY DEPTH TO SEASONAL RANGE IN HIGH DEPrH RANGE AVAILABI-E SOIL NAME AND WATER FROM IN MOISTURE MAP SYMBOL TABLE- SURFACE UNIFIED PEFEFABILITY CAPACITY HYDRIC SOILS Fallinsgton: Fa, Fg 0 0-12 SM,ML or 2.0-6.3 0.02-0.18 sm-sc 12-28 SM,SC or 0.63-2.0 0.18-0.24 ML 28-55 SP,SM or 0.63-6.3 0.06-0.10 Sc Leon: Is 1/2 1-1/2 0-17 SM or >6.3 0.06-0.08 sp-sm 17-38 sp-sm 0.63-6.3 <0.06 38-70 SP >6.3 <0.06 Othello: Ot 0 0-09 ML or 0.20-2.0 0.18-0.27 ML-CL 9-25 CL or 0.20-0.63 0.18-0.24 ML-CL 25-31 Sm 0.63-2.0 0.12-0.18 31-42 SP-SM or 0.63-6.3 0.06-0.12 Sm Pocanoke: Pk, Pm 0 0-20 SM,11L or 0*63-2,0 0*12-0*24 MLr-CL 20-34 SM,SC or 0.63-2.0 0.12-0.18 ML-CL 34-40 SP-SM or 2.00-6.3 0.06-0.12 Sm 40-53 SP or >2.0 <0.06 sp-sm Portsmouth: Pt 0 0-12 SM-SC or 0.20-2.0 0.18-0.24 ML 12-35 SC,CL or 0.63-2.0 0.18-0.24 ML--cL 35-80 SM or SC 2.00-6.3 0.06-0.12 Exhibit 6 -16- SOILS P_Icz VIM= H4MUMUNG PROPEUTES OF THE SOnS (OMr) FROM WORCESTER CCUNTY SOIL SURVEY DEPTH TO SEASONAL RANGE IN HIG1i DEPIH RANGE AVAILABIE SOIL NAME AND WATER FROM IN MOISTURE MAP SYMBOL TABLE- SURFACE UNIFIED PERMEABILITY CAPACITY NON-HYDRIC SOILS Fort Mott: FmB 5+ 0-24 Sm 2.0-6.3 0.06-0.18 12-28 SM or SC 0.63-2.0 0.12-0.18 37-50 SP or >6.3 <0.06 SP-Sm lakeland: InB 5+ 0-66 SP,SP-SM 6.3 0.06-0.08 or SM 66-80 Sm 0.20-2.0 0.12-0.18 Mattapex: MaA, 1 1/2-2 1/2 0-16 ML or 0.20-2.0 0.18-0.27 MpA ML-CL 16-39 CL or 0.20-0.63 0.18-0.24 Mir-CL 39-55 SP-SM,SM 0.63-6.3 0.06-0.18 or SM-SC Sassafras: SaA, SaB2 5+ 0-13 SM or ML 2.00-6.3 0.12-0.18 13-33 SM-SC'Sc 0.63-2.0 0.18-0.24 or C% 33-50 SP-SM or 2.00-6.3 <0.06 Sm Wbodstown: WdA, 1 1/2-2 1/2 0-12 SM or ML 0.63-2.0 0.12-0.24 WdB, WaA, WbB 12-30 SM-SC,ML 0.63-2.0 0.12-0.24 or CL 30-64 sm,sc, 0.63-2.0 0.12-0.18 SP-SM or SM-Sc 64-75 SM or 2.0-6.3 0.06-0.08 SP-Sm Units potentially contain small inclusions of soils on the National Hydric Soil List. Exhibit 6 -17- SOILS SOIL LIMITDMCNS FUR SELECTED USE FROM WORCESTER COUNTY SOIL SURVEY SEWAGE DISPOSAL SEPTIC TANK HOMES WITH FILTER FIELDS BASEMENTS SOIL SERIES AND (EFFLUENT (THREE STORIES MAP SYMBOL DISPOSAL ON SITE) LAGOONS OR LESS) HYDRIC SOILS Fallsington: Fa, Fg Severe: high water Moderate: moderate Severe:' high water table permeability table Leon: Ls Severe: high water Severe: mo 'derate Severe: high water table to moderately table rapid permeability Othello: Ot Severe: high water Slight Severe: high water table; moderately table slow permeability Pocomoke: Pk,Pm Severe: high water Moderate: moderate Severe: high water table permeability table Portsmouth: Pt Severe: high water Moderate: moderate Severe: high water table; moderate to to moderately table moderately slow slow permeability permeability Exhibit 7 -18- SOILS P-q I-IMA= EgM4EER@ PROPEUIES OF THE SOIMS (COW) FROK WORCESTER CIOUNTY SOIL SURVEY SEWAGE DISPOSAL SEPrIC TANK HOMES WITH FILTER FIELDS BASEMENTS SOIL SERIES AND (EFFLU= (U= STORIES MAP SYMBOL DISPOSAL ON SITE) LAGOONS OR LESS) NON-HYDRIC SOILS Fort Mott: FMB Slight Moderate: moderate Slight permeability; slope Lakeland: LrnB Slight Severe: rapid Slight permeability Mattapex: McA, MpA Severe: moderately Slight Moderate: seasonal slow permeability high water table Sassafras: SaA Slight Moderate:-moderate Slight permeability SaB2 Slight Moderate: moderate Slight permeability; slope Woodstown: WdA Moderate: seasonal Moderate: moderate Moderate: seasonal high water table permeability high water table WdB Moderate: seasonal Moderate: moderate Moderate: seasonal high water table permeability; high water table slope WoA Mcderate: seasonal Moderate: moderate Moderate: seasonal high water table permeability high water table WOB Moderate: seasonal Moderate: moderate Moderate: seasonal high water table penTeability; high water table Possibility of polluting nearby wells, springs, ponds, or other water areas Exhibit 7 -19- Soils 24ATED ENGINEERIM D?rERPP.E=CNS FROM WORCIO= 00UNTY SOIL SURVEY SOIL FEATURES THAT AFFECr ENGINEERING PRACrICES FOR SOIL SERIES AND PIPEIM\TE HIGHWAY SITES FOR PONDS DRAINAGE MAP SYMBOIS ICCATION LOCATION OR RESERVOIRS SYSTEMS HYDRIC SOILS Fallsington: Fa, Fg Water tab le Water table Moderate Moderate at or near at or near seepage in permeab- subface; fair subface; fair subsoil; high ity; to good to good seepage in moderately stability stability; substratum; erodible severe frost high fluct- action uating water table Leon: Is Seasonal Seasonal High to very Moderate water table water table high seepage; to moder- at depth of at depth of high fluctuat- ately 1/2 - 1 1/2 1/2 - 1 1/2 ing water rapid feet; poor feet; poor table permeab- stability stability; ility; severe frost hazard of action ditcbbank eaving Othello: Ot Water table Water table LOW Moderately at or near at or near seepage in slow perm- subface; subface; subsoil; high eability; poor poor seepage in highly stability stability; substratum; erodible severe frost high fluct- action uatirxg water table Pocomoke: Pk. Pm Water table Water table Moderate Moderate at or near at or near seepage in permeab- subface; fair subface; subsoil; high ity; stability fair seepage in moderately stability; substratum; erodible severe frost high water action table Exhibit 8 -20- SOILS EST-DM= ENGEMMUNG IRIERPREMMONS (CONT) FROM WORCESTER COUNTY SOIL SURVEY SOIL FEAT= THAT AFFECT ENGINEERING PRACTICES FOR SOIL SERIES-AND PIPELINE HIGHWAY SITES FOR PONDS DRA-MGE MAP SYMBOLS LOCATION LOCATION OR RESERVOIRS SYSTEMS Portsmouth: Pt Water table Water table LOW Moderate at or near at or near seepage in to moder- subface; subface; subsoil; high erately poor poor seepage in slow perma- stability stability; substratum; eability; severe frost high water highly action table erodible NON-HYDRIC SOILS Fort Mott: FmB Seasonal Fair Moderate Moderate water table stability; seepage in permeab- at depth of slight subsoil; ity; mod- more than 5 frost action high seepage eraely feet; fair in subsratum; erodible stability high fluct- uatu-ig water table Lakeland: InB Seasonal Fair High to Excess- water table stability; excessive ively at depth of loose seepage; drained more than 5 material; water table feet; fair slight frost at a depth stability action of more than 5 feet Mattapex: MdA, MpB Water table Water table Low seepage Moderately at depth of at depth of in subsoil; slow perm- 1 - 2 1/2 1 - 2 1/2 high seepage eability; feet; fair feet; fair in substratum; highly stability stability; moderately erodible severe frost high fluct- action uating water table Exhibit 8 -21- soils ESTIMATED ENGnUMRING INIERPREMMONS (CIONT) FRCM WORCESTER CCUNTY SOIL SURVEY SOIL FEATURES THAT AFFECr ENGINEERING PRACTICES FOR SOIL SERIES AND PIPELINE HIGHWAY SITES FOR PONDS DRADTAGE MAP SYMBOLS IOCATION LOCATION OR RESERVOIRS SYSTEMS Sassafras: SaA, SaB2 Water table Good Moderate Well - at depth of stability; seepage in drained more than 5 moderate subsoil; high feet; good frost action seepage in stability substratum; Water table at depth of more than Wbodstown: WdA, WdB, 5 feet WbA, WoB Water table Water table Moderate Moderate at depth of at depth of seepage in permeab- 1 1/2-2 1/2 1 1/2-2 1/2 subsoil; high ility; feet; good feet; good seepage in moderately stability stability; substratum; erodible severe frost fluctuating action water table at depth of 1 1/2-2 1/2 feet Exhibit 8 -22- soils SOIL LTMTIATICNS FM SPFCIFIED PIDCREATICbAL USES FRCM WORCE= COUNTY SOIL SURVEY ATHLETIC FIELDS PARKS AND AND OTHER EXTENSIVE PATHS SOIL SERIES AND CAMPSITES INTENSIVE PLAY PLAY AND 1AWNS AND AND MAP SYMBOLS (INTENSIVE USE) AREAS PICNIC AREAS FAIRWAYS TRAITS HYDRIC SOILS Fallsington: Fa, Fg Severe: high Severe: high Severe: high Severe: Severe: water table water table water table high high water water table table Leon: Ls Severe: high Severe: high Mod erate: Severe: Moder- water table water table high water loose ate: table; loose loamy high loamy sand sand water surface surface table; layer layer loose loamy sand surface layer Othello: Ot Severe: high Severe: high Severe: high Severe: Severe: water table water table water table high high water water table table Pocomoke: Pk, Pm Severe: high severe: high Severe: high Severe: Severe: water table water table water table high high water water table table Portsmouth: Pt Severe: high Severe: high Severe: high Severe: Severe: )&rater table water table water table high high water water table table Exhibit 9 -23- SOILS S .3011, L-MITATIOUS FOR SPECMM REaZEATIONAL USES (OMr) FROM WORCESTER CICUNTY SOIL SURVEY ATHLETIC FIELDS PARKS AND AND OTHER EXTENSIVE PATHS SOIL SERIES AND CAMPSITES INTENSIVE PLAY PLAY AND LAWNS AND AND MAP SYMBOLS (INTENSIVE USE) AREAS PICNIC AREAS FAIRWAYS TRAILS NON-HYDRIC SOILS Fort Mott: FMB Slight Moderate: Slight Moderate: Moder- slope loamy sand ate: surface loamy layer sand surf- ace layer Lakeland: LrnB Moderate: deep Moderate: deep Moderate: Moderate: Moder- loose loamy loose loamy deep loose deep loose ate: sand sand; slope sand loany sand deep loose loary &and Mattapex: MbA, D%)A Moderate: high Moderate: high Slight Slight Slight water table; water table; moderately moderately slow perrea- slow permea- bility bility Sassafras: SaA Slight Slight Slight Moderate: Slight sandy laom surface layer Exhibit 9 -24- soils SOIL LTMI'=ONS FUR SPECI= RECREMONAL USES (aWT) FRC14 WORCESTER COUNTY SOIL SURVEY ATHLETIC FIELDS PARKS AND AND OTHER EXTENSIVE PATHS SOIL SERIES AND CAMPSITES INTENSIVE PLAY PLAY AND LAWNS AND AND MAP SYMBOLS (INTENSIVE USE) AREAS PICNIC AREAS FAIRWAYS TRAILS Woodstown: WdA Moderate: high Moderate: high Slight Moderate: Slight water table water table sandy loam surface layer WdB Moderate: high Moderate: high Slight Moderate: Slight water table water table sandy loam surface layer WbA Moderate: hijh Moderate: high Slight Slight Slight water table water table WOB Moderate: high Moderate: high Slight Slight Slight water table water table; slope Exhibit 9 -25- ERAINAGE EXISTING DRAINAGE PROB= The ma] or drainage problems in this study area are excess floodwater and inadequate outlets to convey the waters to major streams or bays. The channels for the most part have become ineffective due to lack of , maintenance. The following is a breakdown in estimated percent of the channel ages in the watershed: YEAR ClUMM ESTABIJS= AGE OF CHANNEL =CENT 1986-1991 0- 5 Years 8 1981-1985 6- 10 Years 6 1976-1980 11 - 15 Years 6 1971-1975 16 - 20 Years 24 1966-1970 21 - 25 Years 12 Before 1965 26 Years and Older 44 This information was obtained from records in the Worcester Soil Conservation office, knowledge of local people and age of wooded growth on the channel slopes. In this area a channel will need a cleanout in about 12-15 years if maintained properly. Poor maintenance can result in cleanout every 4-6 years. There were 13 sites evaluated throughout this study area for depth, bottorn width, top width and roughness factors for existing channels. These sites are refered to as cross sections in this report. The existing county road ditches averaged 1.3 feet in depth, 1.3 feet bottom width and a top width'of 2.9 feet. The channel on Rt. 611 and Rt. 376 averaged 1.8 feet in depth, 2.0 feet bottom width and a top width of 10.0 feet. The individual farm channels averaged 1.6 feet in depth, 3.0 feet bottom width and a top width of 5.5 feet. With the above capabilities and low velocities, 84% of the channels will not handle the 2 year storm. -26- FLOODWATER DAMAGE Flooding in the watershed results from out of bank flow near the channels and inundation of large areas due to accumulation of surface water. Broad areas of the flat lands are inundated since existing channels are inadequate to convey the floodwater. (Heavy crop losses frULL this type of flooding can be expected about one year in five. The flooding accorpanies local thunderstorms and occasional tropical storms occurring most frequently after crops have been established, resulting in heavy damages). Road flood damages occur at points where roads cross the channels. Poad fill is washed away at pipes. Damages to road shoulders and in'some cases to the roadbed itself occur at times of flood. Sane of the local roads have flooded as many as 4 to 5 times a year. A flooded road creates a safety hazard and endangers human life. PROBLIaIS REI;= TO WATER MANAGEN= Seasonal high water tables affect the prcblem area cropland and forest land. Landowners and operators have not been able to establish effective on-farm drainage measures due to inadequate outlet channels. Poor drainage conditions have prevented farmers from meeting desired planting and harvest schedules and from taking advantage of modern farming methods. Total crop losses are sustained in low areas where pondirxj is experienced for extended periods. Weed control is a problem in areas where wet soil conditions prevent proper cultivation. Shallow root development caused by high spring water tables contributes to drought problems in the summer when the water table recedes. The use of cover and green manure crops is limited by the rise of the water table in the fall. This high fall water table affects crop harvest by preventing access to the fields with -27- heavy harvest machinery. Wet soil conditions also pose problems during timber harvest. The combination of floodwater damage and inadequate drainage causes reduced crop yields, limits crop diversification, increases crop production costs, limits the use and effectiveness of lime and fertilizer and retards the economic growth of the area. EROSION DAMAGE Due to the flat topography, gully and sheet erosion are minor in the watershed. Some slight wind erosion occurs seasonally on the few acres of well drained soils in the watershed. Although erosion and the acconpanying sediment productions are slight, even small amounts of sediment are significant when they are deposited in farm ditches and outlet channels with limited capacities. SEDIMENT DAMAGES Sediment damages are not extensive in the watershed. Some localized sedimentation does occur and it corplicates drainage and floodwater runoff by reducing transmission capacity at culverts and pipes and by building bars behind fallen trees and debris. In the intermittent streams, these sediment deposits are quickly vegetated. Roadway shoulders and present ditch banks are the primary sediment source areas and are most productive during periods of intense rainfall and runoff. DRAINAGE PROBLEMS The following is a brief summary on 17 individual sub-watershed areas under existing conditions and the impact of fully developed conditions. Fully developed -28- is being defined as an area with approximately 48 percent impervious surface area. General sub-watershed area delineations are shown on Exhibit 10, Page 35. SUB-AREA NO. 1 (DRAINS EASTERLY UNDER RT. 611) This sub-watershed consists of 15 acres of which 13 acres are clear and 2 acres are wooded. This area has about 40 percent moderately well drained soils and 60 percent very poorly drained soils. The existing channels are in fair condition and will flood with a rainfall of 3.6 inches in 24 hours if fully developed and no drainage improvements are installed. This area would require 2700 LF of channel improvements to solve it's drainage problems. SUB-AlRYA NO. 2 (DRAINS WESTERLY TO HERRING CP=) This sub-watershed consists of 212 acres of which 24 acres are clear and 188 acres are wooded. This area has about 1 percent well drained soils, 2 percent moderately-well drained soils and 97 percent of poorly drained soils. The existing channels are in fair to good condition. The channels will carry the 2 year storm which is 3.6 inches in 24 hours. It is recommended that maintenance such as mowing or herbicides be done once a year to control wooded vegetation. Sane of the channel vegetation was sparse and should be re-vegetated during the period of September lst to November ist or March 15th to May 15th. The channels may require cleaning the bottom every 10-12 years. During this cleanout, care should be given as to not disturb the side slopes. SUB-AREA NO. 3 (DRAINS EASTERLY UNDER FG. 611) This sub-watershed consists of 68 acres of which 9 acres are clear and 59 acres are wooded. This area consists of about 3 percent moderately well drained -29- soils and 97 percent of poorly drained soils. The existing channels are in fair condition along Rt. 611. Roadside channels along Sinepuxent Road are in poor condition and will flood with a rainfall of 1.5 inches in 24 hours under existing land use. However, if fully developed will flood with a rainfall of 1.2 inches in 24 hours. To inprove this drainage, outlets would have to be constructed to Rt.611. With the inproved outlets roadside, channelization could be done on both sides of Sinepuxent Road. SUB-AREA NO. 4 (DRAINS NORMMLY TO HEMING a=) This sub-watershed consists of 344 acres of which 121 acres are clear and 223 acres are wooded. About 1 percent of this area is well drained, 1 percent moderately well drained, and 98 percent poorly drained soils. The existing outlet channels are fair to poor. Sinepuxent Road will flood on 3.0 inches of rainfall in a 24 hours. This area if fully developed would require intensive drainage to handle the increased runoff. According to the local U.S.D.A., Soil Conservation office, tl-ds area was surveyed for a public drainage association. it is recammended that this area be organized as a public watershed association to nprove the drainage for agriculture and county roads. SUB-AREA NO. 5 (DRAINS EASIMLY UNDER RT. 611) This sub-watershed consists of 10 acres land that is all cleared-. About 20 percent of the area is moderately well drained and 80 percent poorly drained. The existing drainage system is poor. Rt. 611 channels need a cleanout, and some of the farm ditches could use some maintenance. This area will flood with 2.6 inches of rainfall in 24 hours and if fully developed will flood with 1.6 inches in 24 -30- hours. This is one area where iniproved drainage is a must. Some outlet inprovement, east of Rt. 611 is needed to remedy the problezn. SUB-AREA NO. 6 (DRAINS EASTERLY UNDER Rr. 611) This sub-watershed consists of 107 acres of which 50 acres are clear and 57 acres of woods. About 22 percent of the area is moderately well drained and 78 percent poorly drained. This area needs drainage inpravements for Rt. 611 and 47 acres of agriculture land. This land will flood with 1.9 inches of rainfall in 24 hours and if fully developed will flood with 1.5 inches in 24 hours. With any development, drainage is a must. To achieve a good drainage system, channel hTprovement would have to include channels east of Rt. 611. SUB-AREA NO. 7 (DRAINS WESTERLY TO AYER CP=) This sub-watershed consists of 108 acres of which 18 acres is clear and 90 acres wooded. About 2 percent of the area is well drained, 4 percent moderately well drained and 94 percent poorly drained. The lower 2000 feet of this watershed has a good channel that needs some wooded growth nianagement. Th achieve drainage to the upper reaches would be costly due to about 4000 IF of woodland to go through. SUB-AREA NO. 8 (M-AINS WESTERLY TO AYER CP=) This sub-watershed consists of 58 acres of which 3 acres are clear and 55 acres arewoodland. This area has 14 percent moderately well drained soils and 86 percent poorly drained soils. The 3 acres of cleared land are residential areas. The lands adjacent to Lewis Road are moderately well drained and has seventeen -31- homes. To achieve roadside drainage an outlet must be irproved on private lands for about 1100 L.F. SUB-AREA NO. 9 (DRAINS WESTERLY TO AYER CP=) This sub-watershed consists of 80 acres of which 4 acres is clear and 76 acres are wooded. This area has 6 percent moderately well drained soils and 94 percent poorly drained soils. The roadside channels are in poor condition and cannot be inproved unless an outlet is inproved for 1000 LF through private lands to Ayer Creek. Lewis Road will flood on a 2.2 inch rainfall in 24 hours now and fully developed will flood on a 1.4 inch rainfall in 24 hours. This county road will flood 4 - 5 tires a year. SUB-AREA NO. 10 (DRAINS WESTERLY TO AYER allMK) This sub-watershed consists of 121 acres of which 52 acres are clear and 69 acres are wooded. This area has 11 percent well drained soils, 30 percent moderately well drained soils, and 59 percent poorly drained soils. Maryland Rt. 611 needs an outlet constructed for about 4000 L.F. to relieve about 2.0 feet of tailwater. This drainage area is presently being organized into a public watershed association. According to local authorities there is a lot of interest among landowners. once the outlet ditch is constructed the county roads division can clean their roadside channels. At present Lewis Road will flood-with a 2.6 inch rainfall in 24 hours and if fully developed would flood with a 2.2 inch rainfall in 24 hours. This sub-watershed should be considered as a high priority watershed for drainage uprovemnt. -32- SUB-AREA NO - 11 (DRAINS WESTERLY TO AYER CREEK) This sub-watershed consists of 56 acres of which 30 acres are clear and 26 acres are wooded. This area has 3 percent well drained, 18 percent moderately well drained, and 79 percent poorly drained soils. There is one main channel to irprove that is about 2000 L.F. and this would provide Lewis Road with an outlet. The County Road Division could then improve road side drainage. SUB-AREA NO. 12 (DRAINS EASTERLY UNDER RT. 611) This area consists of only 3 acres of woodlands that are poorly drained. The only drainage problem to be solved is water on the west side of Rt. 611. Channel irnprovements, may extend about 500 feet east of Rt. 611 to relieve water along Rt. 611. SUB-AREA NO. 13 (DRAINS WESTERLY TO AYER CREEK) This watershed consists of 11 acres of which 8 acres are clear and 3 acres are wooded. The soils are as follows: 36 percent well drained, 36 percent moderately well drained, and 28 percent poorly drained. This area consists of one main ditch which is 1000 feet in length and drains agriculture lands only. SUB-AREA NO. 14 (DRAINS WEMMY TO AYER CRMK) This watershed consists of 11 acres of which 8 acres are clear and 3 acres are wooded. The soils are as follows: 27 percent well drained, 55 percent moderately well drained, and 18% poorly drained. The only channel in this watershed is adjacent to Rt. 376 and is 900 feet in length. -33- SUB-AREA NO. 15 (DRAINS WESTERLY TO AYER CREEK) This sub-watershed consists of 52 acres of which 2 acres are clear and 50 acres are wooded. About 15 percent of the area is moderately well drained and 85% poorly drained. The roadside channels adjacent to Lewis Road needs improvement. However, to achieve this an outlet through 1800 feet of woodland would have to be constructed to Rt. 376. Many environmental concerns would have to be addressed before any construction is done. SUB-AREA NO. 16 (DRAINS SUJTHERLY AND EASTERLY TO RT. 611) This sub-watershed consists of 15 acres of which 1 acre is clear and 14 acres are wooded. About 7 percent of the area is moderately well drained, 46.5 percent somewhat poorly drained, and 46.5 percent poorly drained. This area drains to Rt. 611 and Rt. 376. Most of the channel improvements would be state and county opening roadside channels. This is an area with high possibility of development. SUB-AREA NO. 17 (DRAINS EASTERLY TO RT. 611) This sub-watershed consists of 13 acres of which is all wooded. This area is 100 percent poorly drained. The ma3or need for drainage irpravements are adjacent to Rt. 611 which is state maintenance responsibility. In order to get good drainage, the outlet east of Rt. 611 may have to be improved about 800 feet. This area is being developed now and will continue to be developed thus increasing the frequency of flooding. -34- I.W Wid g VdA F Wd WdA Pk Pm v -A Y. a 4 Q!, IV Ir, 5CL pe 0 7j S a B'4@ @. R21. p t 7 /=F: V@A @P A. V, 9 water Ni 1" Ok .4 pt.@ Pm Pt @,O 'X 4, r p F. i, - g4 Fa 13- yy 0 Pll ./I _. '! v a Ay@ (.YV aA M F.a @:fr -;V7 e, r WdA. as rat f n, EAqTERN 71 Pk FF a Ipm 1. PL4. ?W A4 Aq MoA -7dA "';N Ti F T .1 P WC, 1W .7. k. P m F a F a @A. L P F WdA' 4" Wdk@- F Fe Fd F@i I N, r'@K: Fa y wa Fa F 4 tA P rii 11-p xent \_4 A A x G b. lk py Ma X Fa P" x ....z Fa :)CEAN Ccj,)C _10 1% IM A S@e k 0 :ra 'd to A IJA \-4" ;74 I W6 13 47% Z: pm- -C(Atills I'Gint WAA x WoA Ab if s 2 @B2 rm P@ 5 WdA T %VC)A Snug Harbor 9 el do 4 A f7 S' T Fg. T SaA Fg r7 Tm S. dA STREAM CLASSIFICATIONS Streams can be classified in four flow regimes: 1. Perennial - flow occurs at all times except during periods of extreme drought 2. Ephemeral - flow occurs only during and within 14 days following storm periods 3. Intermittent - flow occurs between the limits of 1 and 2 above 4. Standing water - water is impounded by blocked ditches or pools All of the streamswithin this study area would be classified as-ephemeral. CHEMICAL, WATER QUA= Factors affecting Chemical water quality of a stream is as follows: 1. Atmosphere additions and exchanges 2. Rain water, dissolved salts and gases 3. Physical and chemical soil properties 4. The hydrology and amount of contact with the soil and associated soil constituents 5. The vegetation 6. Organic productivity of the stream 7. The tremendous diversity of man's activities 8. Terrestrial, avian, amphibious, and aquatic animal population Surface water quality not only varies during the course of a year but will vary from stream to stream. Channels being constructed have been ccmpared. to natural streams and there were some differences. These water quality concerns should be addressed during project formulation. -36- GEOLOGICAL INVESTIGATTON There were several test holes put down by hand auger to determine hYdric soils, and channel stability. The investigation revealed that if channels were designed at depths of 2.0 to 4.0 feet there would be no problem with channel stability. soils indicate several good sites for detention ponds and a few sites for infiltration ponds. Infiltration ponds could be located in Sassafras and Lakeland soils and detention ponds in the remainder soils within the study area. The Unified Soil Classification System was used to determine engineering properties. The soils were predominately sand (74 percent), 20 percent silts and 6 percent clays. There were a few borings in the center of existing channels to determine depth of sediment loads. Depths of sediment ranged from 1.5 to 2.0 feet and based on wooded growth of the channel the rate of sedimentation was approximately 1.0 inches/year. ENGIM=G At the beginning of this project several days were spent in the field evaluating the drainage systems. Information obtained included channel size, roughness factors, sub drainage areas, flow patterns, future channel needs, and existing channel conditions. with this data drainage areas were drafted and measured on aerial photos with the channel locations. Using M-55 we calculated runoff on the 2 year arxi 100 year storm events for Worcester County. Water surface profiles were computed using existing land use and fully developed lands for the 2 year and 100 year storm events. With this data, rainfall amounts which would flood specific sites were calculated on existing land use and future development. It is noted that some sites would flood with less than 2.0 inches of rainfall in 24 hours. There were 17 sub watersheds analyzed individually and the -37- entire 1302 acres was analyzed in its entirety. Each sub-watershed has been written up as well as a composite for the entire study area. Exhibit 16, Page 46, reveals the amount of drainage needs, the estimated cost, and the responsible party for the irprovements. DRAINAGE SO=ONS With 80 percent of the channels 16 years or older there is a great need to improve the drainage. To be able to liTprove drainage, it is recommended that areas with 2 or more beneficiaries, that depend on their downstream neighbor for an outlet, organize a Public Drainage Association (P.D.A.) or a Public Watershed Association (P.W.A.). A P.D.A. has only drainage as an objective, whereas, a P.W.A. has many objectives, such as drainage, wildlife development, stormwater management and other conservation practices. These associations tax individuals according to benefitted acreage. Once channel constxuction has been completed, a maintenance tax can be assessed to maintain the channel, as needed, to prolong the life of the channel. Good maintenance will more than double the life of the channel. In this study area there are 17 sub watersheds at present. Due to the flat topography some of the watersheds may possibly be combined. This can be done by increasing the channel depth in order to extend the design grade. The drainage in this study area falls into three categories as to responsibilities for improvement. ndijbit 16, Page 46, breaks these down by sub watersheds, to responsible parties. The following criteria is reconmended for design of channels for agricultural drainage: 1. Design on 2 year storm 2. Have 1.0 feet of freeboard above hydraulic gradient 3. Average depth of 3.0 feet 4. Average bottom width of 3.0 feet -38- 5. Side slopes = 1:1 6. Control velocities to 2.50 feet/sec. or less 7. Control pipe velocities to 2.50 feet/sec. 8. 10 feet grassed filter strips 9. Sediment traps designed to handle 1.7 tons per acre. They should be located at beginning of construction point and locations near pipes. These traps can be restored and used as stormwater management Ponds. By designing these channels 3.0 feet in depth, this will enable the channels to convey the sub surface waters as well surface waters. The. following design criteria is recommended for channels in housing, ccmmercial, and light industrial developments: 1. Design on a 2 year storm 2. Average depth 1.5 feet 3. Design either 'IV" ditches or parabolic 4. Control velocities to 2.5 feet/sec. or less 5. Control pipe velocities to 2.5 feet/sec. 6. 10 feet grassed filter strips 7. Detention ponds to store the difference between 2 pre and 10 post runoff 8. Minimum top width = 12.0 feet This type of channel will convey the surface water safely and would be easily maintained. These channels if constructed to specifications can be manicured by grading and mowing and blend into yards, etc. For all types of drainage, it is recommended that TR-55 published by the U.S.D.A., Soil Conservation Service, be used. The designer can use the Delmarva Runoff Charts for Design Q. To avoid delays in the installation, it is recommended that the local landowners, Soil Conservation Service, and the University of Maryland Extension service meet with county, state and federal regulatory agencies to review the projects. This should be done during the early planning stage. There are several wetland areas involved and mitigation for their losse , protection and/or enhancement can be planned and agreed upon. There are several trade offs possible -39- Including ponds, wetland development, wildlife seeding and shade on one side of channel to cool waters. Wetlands should be protected or enhanced in all areas if possible. In areas where wetlands are present it is reconmiended that a by-pass channel be constructed if topography and soils would not present a problem in channel stability. If this is not possible, another alternative would be to divert the flows to another outlet. If neither of these were feasible and there was no other route but to go through wetlands, then the reversed berm on each side of the channel would greatly reduce wetland damages and if flat could increase the wetland area at some locations. Structures with flash board risers to raise water elevations, can be installed downstream of the wetland to control the wa ter levels. Again, it will take team work and planning to protect the natural resources in this study area. -40- STUDY AREA WITHOUT IMPROVED DRAINAGE SYSTEMS CONTROL ELEVATION NON-DEVELOPED FULLY DEVELOPED CROSS SUB 2 YR 100 YR 2 YR 100 YR SECT. AREA D.A. RUNOFF RUNOFF 2 YR 100 YR RUNOFF RUNOFF 2 YR 100 YR NO. NO. ACRES FIELD ROAD RCN IN. IN. ELEV. ELEV. RCN IN. IN. ELEV. ELEV. 1 3 68 10.0 78 1,.58 5.49 10.6 11.4 87 2.27 6.55 10.8 11.5 2 5 10 10.5 8 2.35 6.66 10.0 10.6 87 2.27 6.55 10.0 10.6 3 4 20 10.7 81 1.79 5.95 10.4 11.2 87 2.27 6.55 10.5 11.3 4 4 140 9.8 81 1.79 5.95 9.8 10.4 87 2.27 6.55 9.9 10.6 5 4 344 5.4 81 1.79 5.95 6.0 7.0 87 2.27 6.55 6.2 7.2 6 7 108 5.2 78 1.58 5.49 4.2 5.8 87 2.27 6.55 4.5 6.0 7 9 10 6.5 77 1.50 5.36 6.9 7.8 87 2.27 6.55 7.1 7.9 8 9 60 6.5 T7 1.50 5.36 6.9 7.8 87 2.27 6.55 7.1 7.9 9 10 56 11.0 78 1.58 5.49 11.3 11.7 87 2.27 6.55 11.4 11.8 10 11 18 9.8 80 1.72 5.72 10.0 10.6 87 2.27 6.55 10.1 10.7 11 15 18 10.2 76 1.43 5.25 10.0 10.7 87 2.27 6.55 10.3 11.0 12 10 15 13.0 78 1.58 5.49 13.1 13.6 87 2.27 6.55 13.3 13.7 13 6 107 10*2 81 1.79 5.95 10.7 11.7 87 2.27 6.55 10.8 11.9 Exhibit 11 -41- RAINFALL AMOUNT IN 24 HOURS WHICH WILL CAUSE FLOODING (UNDEVELOPED) WITH EXISTING DRAINAGE CROSS SUB RAINFALL RUNOFF SECT. AREA CONTROL 24 HOURS 24 HOURS NO. NO. RCN ELEV. (INCHES) (INCHES) 1 3 78 10.0 1.5 0.23 2 5 88 10.5 3.8 2.54 3 4 81 10.7 3.8 1.95 4 4 81 9.8 3.6 1.79 5 4 81 5.4 2.3 0.80 6 7 78 5.2 4.0 1.89 7 9 77 6.5 2.2 0.50 8 9 77 6.5 2.2 0.50 9 10 78 11.0 2.6 0.86. 10 11 80 9.8 3.4 1.56 11 15 76 10.2 3.5 1.36 12 10 78 13.0 3.4 1.43 13 6 81 10*2 1*9 0*50 Cross-sections are shown on Exhibit 10, Page 35 Exhibit 12 -42- RAINFALL AMOUNT IN 24 HOURS WHICH WILL CAUSE FLOODING (FULLY DEVELOPED) WITH EXISTING DRAINAGE CROSS SUB RAINFALL RUNOFF SECT. AREA CONTROL 24 HOURS 24 HOURS NO. NO. RCN ELEV. (INCHES) (INCHES) 1 3 87 10.0 1.2 0.34 2 5 87 10.5 3.8 2.45 3 4 87 10.7 3.8 2.45 4 4 87 9.8 3.0 1.74 5 4 87 5.4 1.6 0.61 6 7 87 5.2 3.9 2.55 7 9 87 6.5 1.4 0.47 8 9 87 6.5 1.4 0.47 9 10 87 11.0 2.2 1.06 10 11 87 9.8 3.2 1.92 11 15 87 10.2 3.4 2.09 12 10 87 13.0 2.7 1.47 13 6 87 10.2 1.5 0.54 Exhibit 13 -43- FULLY DEVELOPED Q (CFS) 10 YR 10 YR CROSS SUB 24 HR 24 HR 10 YR BANKFULL SECr. AREA RAINFALL RUNOFF Q Q NO. NO. RCN (INCHES) (INCHES) (CFS) (CFS) 1 3 87 5.6 4.13 12.2 15.7 2 5 87 5.6 4.13 2.3 20.3 3 4 87 5.6 4.13 4.2 15.7 4 4 87 5.6 4.13 21.8 40.3 5 4 87 5.6 4.13 46.0 44.8 6 7 87 5.6 4.13 17.5 18.2 7 9 87 5.6 4.13 2.3 12.8 8 9 87 5.6 4.13 10 .6 12.8 9 10 87 5.6 4.13 10.0 28.6 10 11 87 5.6 4.13 4.2 28.6 11 15 87 5.6 4.13 4.2 20.3 12 10 87 5.6 4.13 3.3 12.8 13 6 87 5.6 4.13 17.3 18.2 Exhibit 14 -44- RECOMMENDED CHANNEL DESIGN CRITERIA FREEBOARD = 1.0 FT HYDRAULIC DEPTH (D) = 2.0 FT BOTTOM WIDTH (B) = 3.0 FT SIDE SLOPE (S: S) = 1: 1 AREA 10.0 FT. RADIUS = 1.16 FT. N .040 VELOCITY (V) = 1.486 R 2/3 S 1/2 N CROSS SUB SECT. AREA Q SLOPE VEL. Q BANK FULL NO. NO. C.F.S. FT/FT FT/SEC AV Q C.F.S. 1 3 6.4 0.0003 0.81 8.1 15.7 2 5 1.6 0.0005 1.05 10.5 20.3 3 4 2.3 0.0003 0.81 8.1 15.7 4 4 12.2 0.0020 1.84 18.4 40.3 5 4 25.7 0.0003 0.97 26.2 44.8 6 7 9.1 0.0004 0.94 9.4 18.2 7 9 1.2 0.0002 0.58 5.8 12.8 8 9 5.3 0.0002 0.58 5.8 12.8 9 10 5.4 0.0010 1.48 14.8 28.6 10 11 2.3 0.0010 1.48 14.8 28.6 11 15 2.0 0.0005 1.05 10.5 20.3 12 10 1.7 0.0002 0.58 5.8 12.8 13 6 9.8 0.0004 0.94 9.4 18.2 CHANGE BOTTOM WIDTH TO 6.0 FT. AND HYDRAULIC DEPTH TO 3.0 FT. AREA WOULD BE 27.00 FT. AND RADIUS 1.86 FT. NOTE: BANK FULL WOULD INCREASE THE CHANNEL CAPACITY BY 94% Exhibit 15 -45- CHANNEL IMPROVEMENT NEEDS SUB DRAINAGE PRIVATE PRIVATE COUNTY COUNTY STATE STATE AREA L.F. COST L.F. COST L.F. COST 1 700 . $1,960.00 300 $600.00 1,700 $3,400.00 2 5,200 14,560.00 - - 900 1,800.00 3 2,000 5,600.00 6,200 12,400.00 3,300 6,600.00 4 17,800 49,840.00 10,800 21,600.00 700 1,400.00 5 800 2,240.00 - - 1,900 3,800.00 6 3,600 10,080.00 - 3,000 6,000.00 7 3,000 8,400.00 Soo 1,600.00 - 8 1,000 2,800.00 1,900 3, 800.00 9 2,200 6,160.00 2,800 5,600.00 - 10 4,400 12,320.00 4,000 arooo.00 2,200 4,400.00 11 2,100 5,880.00 3,400 6,800.00 - 12 - - - - 600 1,200.00 13 1,000 2,800.00 - 14 - - - - 900 1,800.00 15 1,800 5,040.00 1,200 2,400.00 - 16 - - 600 1,200.00 2,800 5,600.00 17 - - - 1,200 2,400.00 TcriAls 45,600 $127,680.00 32,000 $64,000.00 19,200 $38,400.00 NCYIE: FMATE CONSTRUCTION COST $ 2.80 PER L.F. a)UNTY AND STM COST $ 2. 00 PER L. F. Exhibit 16 -46- OTHM ARM OF CCtKMM AQUI= Ground water is used for all domestic, industrial, and public water supplies in the county. The wells furnishing these denkinds are less than 400 feet deep for the most part and are finished in unconsolidated coastal plain deposits that are of miocene age or younger. In researching 16 wells the following data was collected: Name of Aqui Number Rancre in Depth (Ft) Pleistocene 12 11.0 to 95.0 Pocomoke 1 180 Manokin 3 240.0 to 275.0 The above three aquifers were the only ones that are being used for water supplies in this study area. SEVAGE DISPOSAL 'General Sewage disposal is a definite problem not only in this study area but throughout the county. This study area has approximately 77 percent hydric soils (1010 acrez). With the hydric soils and poor drainage systAws with high water tables this area has a definite envirormiental problem. As the growth increases, the sewage problem is going to escalate. This is especially true in this study area where the demand in the future will consist of ccnmiercial and increased residential development, recreation facilities, and possible motels. With the high percentage of hydric soils, this area is unsuitable for development on septic -47- tank disposal systems alone. In order to address this problem we have researched other alternatives for sewage disposal systems that are being used in the coastal plains. Bermed Infiltration Ponds A bermed infiltration pond is an excavation approximately eight to ten feet deep with no less than 10,000 square feet in surface area. The excavation exposes a water bearing substratLun overlain by an impermeable soil. Part of the excavated material is placed around the pond perimeter to form a berm (Figure 1, Page 53). The water from the substratum rises and falls in the pond with seasonal fluctuations in the water table. Septic tank effluent is discharged near the bottcxn of the pond for disposal. The biological organisms in the pond ccmplete the treatment process and the water moves into the surficial groundwater surrounding the pond or evaporates. The purpose of the design is to overcome site limitations that prohibit the use of conventional trench or sand lined trench on- site sewage disposal systems in areas of the Coastal Plain. These systems can only be used where upper and lower confining units isolate non-potable shallow saturated sands. Bermed infiltration ponds can be used only in the following soils that are in this study area; they are Mattapex and Othello. They have proven to be very effective in Dorchester County and are approved by the Maryland Department of the Envirormient. These ponds are constructed when underground sewer systems will not function in heavy clay and silt soils with high water tables. The water quality in the ponds will be able to sustain fish. However, there are some site criteria issued by the Maryland Department of the Environment that mst be met. They are as follows: -48- 1. Minimum lot size is 4.0 acres 2. A bermed pond must be at least 300 feet from another bermed pond 3. Land slopes shall be less than 2 percent 4. 150 feet from any well 5. 150 feet from surface water 6. 100 feet from property line 7. 50 feet from building foundations Design Criteria 1. Interior side slopes = 1:1 2. Pond depth shall be a minimm of 8.0 feet and expose a permeable substratum as much as practical (minimum of 2.0 feet) 3. Berm shall be a minimum of 20 feet wide, 1.5 feet in height and be constructed with silts and clays. Interior side slopes shall be 6:1 and exterior a minimum of 4:1. 4. The berm must be stabilized and seeded within 14 days of construction. No trees are permitted in the berm. 5. Signs warning of deep water and waste disposal should be posted and be clearly visible from all four directions. Soils - Profile Description Upper confining A & B horizons with a minimum thickness of 36 inches and textures of silt loam, silty clay, silty clay loam, clay loam or clay underlain by saturated fine sandy soils with a minimm thickness of 24 inches and a lower confining layer at least 60 inches in thickness. Size Requirements NUMBER OF HOUSING SURFACE AREA BIP RESERVED AREA UNITS SO. Fr. INCLUDES BIP SO. FT.' 1 or 2 10,000 20,000 3 14,000 28,000 4 18,000 36,000 5 22,000 44,000 6 25,500 51,000 7 29,000 58,000 8 32,500 65,000 9 36,000 72,000 10 39,500 79,000 -49- Cost Of Bermed Infiltration Ponds According to Dorchester County Officials, the ponds cost between $ 14,000 and $ 16,000 for the average home site. Summary Of Finding Although these bermed infiltration ponds are expensive, they can be used in areas not suited for septic drain fields. They have been tested for leaching and the maximum distance that nitrates have been detected is 150 feet. Attached are the following drawings: Figure 1 - A bermed infiltration pond design sheet with cross sections Figure 2 - A typical four compartrent septic tank Figure 3 - A typical buried intermittent filter system Figure 4 - A typical bermted infiltration pond concept Sand Mound This study area is located in management area "All which is the most restrictive area in Worcester County for on-site sewage disposal. This system will work only in soils where seasonal high water is 24 inches or greater below the surface. The only soils in this watershed where you could use the sand mound system are sassafras or the deep woodstown soils. This system requires a septic tank, a pumping station, and a sand mound consisting of stone and sands. The waste is pumped onto the stone and then filters through 24 inches of sand to the ground su@ace then into the ground that is 24 inches above seasonal high water table giving the site 4.0 feet of filtering before entering the ground water. This system varies in cost from $ 9,000 to $ 15,000. -50- Conventional Gravity Underground septic systems with septic tank, distribution boxes, and stone lined trenches with 4 inch perforated plastic pipe are limited for effective use in the following soils: Fallsington, Leon, Mattapex, Othello, Pocomoke and Portsmouth. Soils with slight to moderate limitations are: Fort Mott, Lakeland, Sassafras and Woodstown. Sane Woodstown may be classified as moderate to severe. The construction of channels 3.0 feet in depth would relieve some problems with a high water table in Woodstown and Fallsington and they may pass a perk test. The cost on a system of this type varies from $ 2,500 to $ 4,000 depending on design capacity. ILijection There is a proposal to use this type system on parcel 149, Map No. 33, in the southeast section of this study area. The system is designed for 242 housing units with 300 Gal./Day of wastewater for each unit. This is a total of 72,600 Gal./Day. for the system. Proposed is installing 6 - 7211 x 341 pipes into the ground. The average elevation is 8.0 feet M.S.L., thus the pipes would be installed at elevation - 24 feet M.S.L. In researching sane 16 private wells in the area, we found wells from 11. 0 feet to 275 feet in depth. This may cause water contamination in the more shallow wells. The jury is still out on this type of disposal system. CentralWater And Sewacfe This system can be used in this study area where much of the land is unsuitable for development with on-site septic disl@osal. It can be a public central water and sewer service or a private system installed by the developer. -51- This determination can be made by Worcester County officials based on economics and projected land use. However, there are some principals that should govern this type of system and they are as follows: 1. Service to be provided when other systems due to soil limitations will not function 2. rib correct an existing public health hazard or envirorunental threat I. Used to acc=nodate high density growth areas only 4. Serve only areas that would support the system with little help from county tax money -52- kn -JG\ 5's, ILI Splash Plate Discharge Valve From Plan Pretreatment Insulated Cover Distribution Vent Spla sh Pipe P pe Plate 0 wees - - - A *" * 00 a 0 V. '@ 0 4 A. 400 0 0 0 Media *oleo,* *4 24"-36" 0 09 a... wo Gravel A 0 . . Graded 1/4 t 01 'h" ......... .. ve P -ra 67 >I ON a Discharge Concrete Slab Collection Pipe Perforated or Open Joint Prnfilp TYPICAL BURIED INTERMITTENT FILTER INSTALLATION A Distribution Box k-Vent Pipe Vent Pipe Z ;.7 1 House Sewer tic Sep Tank ;:;4X;A9;;;4Zischarge V inspection Manhole A and Disinfection Contact Tank (if Required) Profile Top Soil Fill 61 Drainage L.2b, - ...... . ... 6 in. Marsh Hay or >8 in. Drainage Fabric "00 Perforated or Open Graded Gravel 3/4" t 2 Joint Distributors ZZII. 4-36 in. 1, 2 Filter Media Pea Gravel 4- @-*'-, M. 8 in. ........ I ......... ...... z, -II0 Graded Gravel 1/4* to 11/2"' Perforated or Open Joint Pipe. Tarpaper Over Open Joints 0 L Seciion A-A AXV, 5@0' krud Infiltration tend (Not u mu) truiplutift (A) Evowation (1) larm drainage (80) Ijg@ belm ?retreated to OW) Infiltration (1) V pond Influent 8 "Oo Pow offlumat 09+1 rem Op The WO Infiltration POW Concept immelves pretrostlaq tow mussoold vast" prior to disposal Is us sons. Lwp volumas'af water enter the pand free prulpitation, surface drainage free tm imide of the bera and the pretreeted wastouster: WAr .144vn the pW by.gpipm 4a wd Infiltration. STCORK VV= 14NRAGEMERr The achievement of water quality protection in urbanizing watersheds is heavil y dependent upon the systematic implementation of effective, basin-wide Storm Water Manage-nent (SM) controls. The benefits derived include groundwater recharge, low stream flow augmentation, water quality enhancement and reduction in the total runoff volume. Each of the benefits help negate the adverse environmental impacts resulting from development and land use change. Infiltration practices include the following: 1. Infiltration Basin 2. Infiltration Trench 3. Dry Well 4. Vegetated Swales with Check Dams 5. vegetated Filter 6. Wetlands 7. Artificial wetlands 8. Detention Basin 9. Combination Underground Detention Omniber and Recharge Facility 10. Stormwater Treatment System Using Peat-Sand Filters 11. Retention Basin infiltration practices are dependent upon the soils profile and the location of the seasonal groundwater table. The soils table (Exhibit 6, Pages 16-17) gives approximte values for the water table and permeability. This information could be used to evaluate applicable use on a specific site. Storm water detention and retention structures are the most used practice in Worcester County. Exhibit 17, Page 60 is a sunrary of detention sto rage required for the entire study area. Approximately 72 acre-feet of storage would be required if the area is fully developed. Since each of the seventeen drainage areas have separate outlets and topography does not lend to combining drainage areas (except certain areas along MD 611), total development or partial develqpment should consider the entire area within the sub-drainage area so that -57- stormwater management facilities can be strategically located for maximum effectiveness. Infiltration Trenches and Combination Underground Detention chambers and Recharge Facilities have been used where applicable. Although infiltration systems are being used, these systems in a highly urbanized setting have a relatively short life span. A draft paper, "Peat-Sand Filters, A Proposed Stormwater Management practice for Urbanized Areas", prepared by John Galli, Department of Environmental Programs, Metropolitan Washington Council of Governments and prepared for the Coordinated Anacostia Retrofit Program and D.C. Department of Public Works, indicates that this type of system has merit for controlling runoff. The ran made-soil infiltration system combines peat, sand and a grass cover crop to achieve high overall pollutant removal efficiency within a single, relatively compact unit. In addition, the system also features a small wet pool for pre-treating stormwater runoff. The general compactness and relative freedom of the proposed system from common site constraints (such as high water table, poor soils, etc.) make it a candidate for many end of pipe applications. This type of system may lend itself to camvercial residential development, such as a neighborhood service center-could transport storm water through storm sewer to the management facility and eventually to receiving waters through improved drainage systems. Exhibit 18, Page 61 is a schematic of the system from the draft paper (Galli). The development of stormwater management policy is difficult because of the many problems associated with surface runoff in urbanizing areas. These problems are related to both the quantity and quality of stormwater runoff that requires multi-objective design policies to mitigate adverse impacts. Increased flooding magnitudes become more evident because the volume and rate of runoff exceed the -58- natural carrying capacity of the stream channel, which cannot adjust to the sudden impact of urban development. It is suggested that Worcester County maintain the c urr ent progress in Storm water Management Programs and continue to investigate new approaches as they become available. -59- STCORK WA= SIURAIGE HEW1RE1fflNM The Worcester County stormwater code, Title 2, Land Resources, Subtitle 1, stormwater management; states the following: If there is not an outlet with the capacity to handle a 25 year storm. which is 6.4 inches of rainfall in 24 hours the developer or owner has to store the difference of the 2 year pre and the 10 year post development runoff. The storage facility is more effective if located near the outlet or downstream section of the development. Once constructed they must be properly maintained to retain their design capacity. Our intensive field evaluation and hydraulic analysis of the area indicates that there are no channels that will convey the 25 year storm. The following table shows the storage required for 17 sub watersheds if fully developed. DEIENITON BASIN STORAGE SUMMARY SUB WATERSIM DPAMGE AREA 2 YEAR Q CFS 10 YEAR Q CFS RE@@ STORAGE NUMBER SQUARE MIIE PRE POST AC. FT 1 .023 1.9 3.3 0.70 2 .330 15.9 30.6 12.11 3 .110 6.4 12.2 4.04 4 .540 25.7 46.0 18.71 5 .016 1.6 2.3 0.32 6 .167 9.7 17.3 5.42 7 .169 9.1 17.5 6.21 8 .090 5.0 10.4 3.63 9 .125 6.7 13.6 4.91 10 .189 10.0 19.2 6.94 11 .088 5.5. 10.2 2.93 12 .005 0.5 0.9 0.19 13 .017 1.4 2.6 0.58 14 .017 1.4 2.6 0.58 15 .080 4.6 9.4 3.22 16 .023 1.6 3.3 0.97 17 .020 1.2 3.0 1.05 Exhibit 17 -60- PEAT - SAND FY UTERS (NO SCALE) FLOW SPLITTER' WET PRETREATMENT BASIN ARTIFICIAL PEAT SAND FILTER WETLAND OUTLET TO RIVER TIDAL RIVER Exhibit 18 ;,-61- RECRFATION Parcel 274, Tax Map No. 26, Robert J. Taylor, et al. has been proposed by the owner as a private county recreational park. Approximately 90 percent of the land area is Fallingston (Fg) , Pocamoke Loam (Pm) and Pocomoke Sandy Loam (Pk) . The Worcester County Soil Survey, Soil Limitation for Specified Recreational Uses shows that these soils have severe limitations because of the high water table. An adequate drainage system combined with water nonagement and ecological improvements to offset environmental damage may qualify the site for,the intended use. This parcel contains 39.67 acres of wooded land. The planned recreation area with Pocomoke and Fallsington soils, associated with seasonal high water tables at the surface, limits the use for athletic fields such as soccer and softball without intensive drainage. The ideal drainage system would be accorrPlished by inproving an outlet channel and installing sub-surface drainage (4 inch plastic tile). The spacing for the tile would be 70 feet or 627 L.F. / acre. An estimated cost of $ 500.00 / acre for tile plus $ 5,500 for the outlet channel would be $ 25,575 or $ 637 / acre. Suggestive alternatives are: 1. Wildlife and nature trails for educational purposes with picnic areas. 2. Water theme park such as Wild World Water and Amusement Park located in Iargo, Maryland. 3. A chip and putt lighted nine hole golf course. The operator would furnish one club and one putter. This is a fast growing sport for family entertaumient. -62- OCEAN CITY MUNICIPAL AIRPORT Introduction The initial Master Plan for Ocean City Airport was developed in 1958 by Airways Engineering Corporation. A new Master Plan was prepared by Greiner Engineering Sciences, Inc. in 1977. A revised Master Plan Update was completed in December, 1987 by Greiner Engineering Mid-Atlantic, Inc. The purpose of the Master Plan Update was to revise the airport layout plan in accordance with existing improvements and for development based on projections of future needs. The 1987 update indicates that Ocean City has experienced substantial growth in year-round population and that this trend should continue as the economic base increases. Ocean City is also attempting to stabilize the seasonal fluctuations of the tourism market by aggressive newspaper, radio and TV advertisements along with direct mailings and special events during the off-season. Special cut rate incentives and weekend package deals are being promoted to increase off-season visitors. It has been estimated that twenty-eight golf courses will be located in the approximate area by the year 2000. The construction of these golf courses in the immediate area of Ocean City could also increase the tourism population during the off season. Continued progress toward attracting a more stabilized tourist population may increase airport usage, therefore; necessitating airport expansion. Future Expansi The Master Plan Update states that with the existing and projected future demand for turbojet operations, the ultimate would be that both runways be extended to accommodate these aircraft. For extensions of these runways more land would be required, the relocation of MD 611 may be required and an extended -63- approach slope would be necessary. Another option would be the total relocation of the airport complex and devote the complex to other compatible uses. The 1987 Master Plan Update recommends that the improvement on runway 14-32 be in a westerly direction and on runway 1-19 be in a southerly direction. The southerly direction of runway 1-19 is complicated by the construction of Eagles Landing Golf Course which may dictate an extension in a northerly direction, if wetlands crieria can be mitigated. It is inherent that the airport maintain existing operation and/or expand its size and level of operations to satisfy existing and future aviation demands and that persons who live, work or own property near the airport may enjoy a maximum amount of freedom from noise or other adverse impacts. The U.S. Department of Transportation, Federal Aviation Administration Circular AC 150/5050-6, Airport Land Use Compatibility Planning provides generalized guidance for compatible land use planning in the vicinity of both new and existing airports. The circular identifies the primary planning inputs as noise quality (LUG) zones (Exhibit 19, Page 68), noise sensitivity criteria (TUG Chart I, Exhibit 20, Page 69, and Chart II, Exhibit 21, Page 70), existing land use patterns and the direction and rate of change in these patterns (unconstrained future land use patterns). Other inputs to the planning process normally required, include land suitability analysis (i.e. slope analysis, drainage and flooding, soils and bearing, vegetation and fauna, environmental analysis, cultural or historic sites, etc.); water and sanitary sewer availability; thoroughfares and access; existing zoning; existing easements and restrictive covenants, total acres of need for each major land use category for future years; and the interrelationships of each use. Protection of runway approaches from interference by high objects or buildings, smoke, glare, bird hazards, electromagnetic radiation, and concentrations of -64- people is also an essential aspect of the con-patibility schemes. Many uses having high noise tolerance can create interferences, as an example, sanitary landfills, solid waste dumps, and certain kinds of agricultural operations, while unaffected by noise, tend to attract large numbers of feeding birds and can be safety hazards to airport operations. Commercial and industrial districts may also create potential safety hazards ('glare, smoke, etc.) unless adequate protection is included in the plan. Additional detail is contained in AC 150/5190-4, A Model Zoning Ordinance to Limit Heights of objects Around Airports, and AC 150/5200-3, Bird Hazards to Aircraft. Most land uses are considered compatible with noise levels less than 65 day- night average sound level (LdN) contour. The immediate area around the Ocean City Airport may be affected by this level but also safety of aircraft and residents within the operational area is of equal importance. The land use planning overall goal should achieve an acceptable balance between the needs and tolerances of both the airport and its neighbors. This would require that both entities be open and flexible, recognizing that some changes to present courses of action may be essential to promote public safety and economics of the area. Planning criteria may encourage Worcester County government to incorporate land use and development controls. Land Use And Development Controls Land use and development controls can be used to protect the impact areas from encroachment. A number of different controls are normally available to local governments and/or to airport sponsors to prevent such intrusions. The controls which are generally most useful for achieving airport compatibility - zoning, easements, and land purchase - will be discussed here. other controls having -65- either less or special applicability include building codes (noise insulation requirements) health and housing codes, programning of public capital improvements, and cooperation of financial institutions. a. Zonincr. The most common and useful land use control is zoning. Zoning is an exercise of the police powers of state and local governments which designates the uses permitted on each parcel of land. It normally consists of a zoning ordinance which delineates the various use districts and includes a zoning map based upon the land use element of the commmity's conprehensive plan (the airport-land use coirpatibility plan should be a part of the comprehensive plan). The primary advantage of zoning is that it can promote coqmtibility while leaving the, land in private ownership, on the tax rolls, and economically productive. At the same time it is subject to change and must be continually monitored if it is to remain a viable courpatibility tool. b. Easements. Easements ray be used as an effective and permanent form of land use control. In many instances, they may be better for airport compatibility purposes than zoning. Easements are permanent, with title held by the purchaser until sold or released, and work equally well inside or outside zoning jurisdictions. They are directly enforceable by the holder through civil courts and may often be acquired for a fraction of the cost of the land value. Also of consideration is that the land is left free for full development with compatible uses. c. Transfer of Develorment Ricthts (TDR). TDR involves separate ownership and use of the various "rights" associated with a parcel of real estate. -66- Under the = concept, some of the property's development rights are transferred to a remote location where they nay be used to intensify allowable development. d. land Purchase. Purchase of land in fee simple is the most positive of all forms of land use control. It is also usually the most expensive. However, when combined with either resale for caTpatible uses or retention and use for a compatible public purpose, the net cost may be effectively reduced significantly. As a preventative meam=e, purchase should usually be limited to critical locations or to hard core cases where other solutions are not workable. It is reconunended that the use of zoning around the airport and its environment should be considered for airport safety as well as public safety. Zonuig mist consider the total needs of the area with the specific needs of the airport. It appears that the primary need for the airport is the area directly under the approach slopes, namely; west and north toward MD 611 which includes residential, woods, utility, and highway obstructions (Exhibit 20, Page 69 and Exhibit 21, Page 70; Obstruction). With these types of obstruction special zoning considering height of structures, type of structures, density and type of activity should be regulated. The limits of zoning regulation should at least encompass the area under the reccm@ended FAA approach slope. Map No. 2, (Map Pocket) shows area under approach slope on aerial photo of an approach slope configuration. Configuration is determined by existing obstructions but putting limits on future obstruction. other obstacles may need to be overcome by the purchase of land, by the transfer of development rights or by obtaining easements. This will take cooperation between land owner, county government and owners of the airport (Ocean city) . -67- AC 150/5050-6 12/30/77 Irl TYPICAL LAND USE GUIDANCE ZONES AND NOISE IMPACT AREAS FOR A LARGE AIRPORT LETTERS REFER TO LUG ZONES AS USED IN CHARTS I AND 11, SEE \% RAPH 21 PARAG kj AIRPORT BOUNDAR Y x I 1 2 3 4 MILES AIRPORT NOISE PATTERNS EXHIBIT 19 -68- LAND USE GUIDANCE CHART 1: AIRPORT NOISE INTERPOLATION L-n 0 @-n INPUTS; AIRCRAFT NOISE ESTIMATINIS METHODOLOGIES HUD NOISE SUGGESTED C:@ LAND USE NOISE cn GUIDANCE EXPOSURE L dn NEF CNR CNEL ASSESSMENT NOISE 0 DAY-NIGHT AV$. NOISE EXPOSURE COMPOS IT E COMMUNITY NOISE GUIDELINES CONTROLS ZONES (LUG) CLASS SOUND LEVEL FORECAST NOISE RATING EQUIVALENT LEVEL 0 0 0 0 NORMALLY MINIMAL "CLEARLY REO U IRES TO TO TO TO No EXPOSURE ACCEPTABLE" SPECIAL A CONSIDERATIONS 55 to 90 55 55 to 90 55 01 w LAND USE P-3 MODERATE NORMALLY CONTROLS EXPOSURE TO TO TO TO ACCEPTABLE" SHOULD BE CONSIDERED 65 30 100 65 65 30 )Do 65 NOISE EASEMENTS, S16NIFICANT ONORMALLY LAND USE, TO TO TO TO AND OTHER EXPOSURE UNACCEPTABLE COMPATIBILITY CONTROLS T5 40 its 75 RECOMMENDED 75 40 115 T5 CONTAINMENT WITHIN AIRPORT SEVERE *CLEARLY BOUNDARY OR USE & a OF POSITIVE EXPOSURE CEPTABLE" COMPATIBILITY CONTROLS Li HIGHER HIGHER HIGHER HIGHER RECOMMENDED LAND USE GUIDANCE CHART Ir: LAND USE -NOISE SENSITIVITY INTERPOLATION Ln 0 LAND USE LUG ZONE' LAND USE LUG ZONE' LAND USE LUG ZONE' - SLUGM UG_ SLUGM SUG_ SLUIGM SU6_ Cn NO. NAME GIESTED STUDY NO. NAME GESTEDISTUDY NO. NAME GE STED STUDY 0 I 4 CIN _Lo Residential. A-0 30 Manufacturing (continued). 60 Services. 11 Household unit!. 31 Rubber and miscellaneous plastic C-D 61 Finance, insurance. and real estate 0 product&-manufacturing. services, :,I::tI Single unit"Clached. A at Stone, clay, and glass product&-- r, - D at 'Personal services. a Single unit 6---semiattached. A manufacturing. : 3 Business services. a 11.13 Single unit&--attached row. a 33 Primary metal industries. D 4 Repair services. C 34 Fabricated metal product*--manufac- D 65 Professional services. B-C 11 1 Two units--side-by-side. A go Contract construction services. C turing. Two unit*--one above the other. A as rofessional, scientific, and control- a 6 T Governmental services. ling instruments; photographic and Go . Educational services. A-11 A partments-walk up. a optical goods; watches and clGck&-- so Miscellaneous services. A-C Apanments-elevator. B-C manufacturing. 39 Miscellaneous manufacturing. C-D 70 Wtural, entertainment, and recres. Group quarters. -0 ,on. 2. Residential h tels. 0 40 Tr 14 Mobile homeoparks or courts. A unsMation. communication, and 1: Transient lodgings. C 71 Cultural activities and nature exhibi. A Other residential A-C tions. I FA 41 Railroad, rapid rail transit. and street 0 72 Public assembly. A 3 W railway transportation. 73 Amusements. C 0 @_l to Manufacturing. C-D 42 Motor vehicle transportation. 0 74 Recreational activities. 5 B-C 1 @_3 49 Aircraft transportation. 0 To Resorts and group CAMPL A 44 Marine craft transportation. 0 76 Park@, A-C Food and kindred product*.-manu. C-0 4: Highway and street right-of-way. D 79 Other cultural, entertainment, and A-S f ct rin 4 Automobile parking. D T,,a,d,u mail product*-manufacturing. C-D 47 Communication. A-0 recreational.'s Apparel and other finished products. c-o It 44 Utilities. D made from fah 40 Other transportation, communication, A-D rice. leather. and go Resource production and extraction. similar maigrialp-manufacturi4 and utilities. 24 Lumber and wood products (except C-0 111I Agriculture. C-D furniture) -manufacturing. at Agricultural related activities. C-D 95 Furniture and fixtures--manufactur. C-0 so Tradt. 4 3 Forestry activities and related services. 0 in$. 6. . F4 3hingg activities and related services. D 26 Paper and allied products--manufac- c-o at Wholesale trade. C-0 as 0in. activities and related services. 0 !ng. as Retail trade-building materials. hard- C as her resource production and extrac. C-D @ur 27 Printing, publishing, and allied in. C-D ware, and farm equipment. 1100. dus!ries. 83 Retail trade-general merchandise. C as Chemicals and allied product*--man- C-D 64 Retail trade--food. C 90 Undeveloped land and water areas. ufacturing. so Retail trade-automotive, marine craft, C - . to Petroleum refining and related Indus- C-D aircraft, and accessories. 91 Undeveloped and unused I;nd area D :6 R:t:il trade-apparel and accessories. C (excluding noncommercial forest tries 3 7 R t il trade-furniturc, home furnish- C development). ingr, and equipment. st .14oncommercial forest development. D Retail trade-eating and drinking. C-0 93 Water areas. A-D Other retail trade, 94 Vacant floor area. A-D 95 Under construction. A-0 99 Other undeveloped land and water A-0 are&& I 1. REFER TO LAND USE GUIDANCE CHART I , PAGE 12. 2. ZONE*C* SU66ESTED MAXIMUM EXCEPT WHERE EXCEEDED BY SELF GENERATED NOISE. .5. REQUIREMENTS LIKELY TO VARY- Lj 3. ZONE*D" FOR NOISE PURPOSES; OBSERVE NORMAL HAZARD PRECAUTIONS. INDIVIDUAL APPRAISAL RECOMMENDE 0 4. IF ACTIVITY IS NOT IN SUBSTANTIAL, AIR-CONDITIONED BUILDING, 60 TO NEXT HIGHER ZONE. SLUCM: STANDARD LAND USE CODING MANUAL, SEE PARAGRAP D1 -4 15'0 ---- ------- =7 00 Ar 57.T,,@ 7 - r Aa I Wp Ar 00 -4:sso AV, low- moo -7-7 A PFR'CA C 14 /W .7 kj Zc6f_ EXHISI T 22 --- ----------- 4-@ 00 7 'LOPE 4JC-7-?blV AF/W ------ - ------- EX H I ST 7Z UTILITIES, ROADS, SERVICES Maryland Route 611 and South Point Road serves as a highway artery from South Point to U. S. Route 50 with Maryland Route 376 intersection at Lewis Corner. Anticipated population growth both year round and seasonal, which increases the demand for housing and associated services, will place new demands on this higl@way. The Maryland State Highway needs inventory targets Maryland Route 611 for improvement - The Worcester County Comprehensive Plan identifies the -study area as suburban Residential (moderate-density residential, suburban commercial, cluster developments) . A-u-port runway extension would require relocation of Maryland. Route 611 in the immediate area. Any assumption that predicts moderate to intense future development in the study area will require modifications to traf f ic patterns. Worcester County planning can suggest that any improvements to the highway incorporate future drainage plans to insure for adequate drainage. Associated with this hig1way are such things as telephone and television cable, water systems, sewer systems and drainage systems. High water tables hinder and increase cost of installation of such service. The Worcester County Comprehensive Plan recognizes future development of West ocean City and the traffic conflicts that may occur. The county should work very closely with the state to minimize problems related to through and turning traffic movements within this area. -73- FUNDING AND TMINICAL ASSISrANCE RESOURCES The possible program resources that may assist include the following: -farmers Home Administration --- Assistance for sewers and water - small ccffanunity (as of October 1, 1991, this authority will be turned over to Rural Development Administration (RDA). Department of Housing and Comminity Development - DHCD's infrastructure Loan Program - This program will loan money at a favorable interest rate to Worcester County for any number of infrastructure related improvements (water and sewer, roads, etc.) - DHCD's Community development Block Grant Program is a possible source of funds, albeit a long shot because of program restrictions and county priorities. The program must benefit 51 percent low and moderate income citizens and the funds must be spent in a timely manner. Department of Environment - Water Quality Revolving Loan fund - The payback for this loan fund is keyed to user affordability. - State Water Pollution Cost Share Program - Special Pro]ects Program -74- OWNERSHIP OF PROPERTY IN STUDY AREA (14AP 3, MAP POCKET) NUMBER PARCEL OWNERS' NAME OWNERS' ADDRESS ACRES TAX MAP 33 1 P71 Coates, Raymond D. P.O. Box 366 90.22 Berlin, MD 21811 2 P70 Hastings, Russell L. 11719 Assateaque Road 4.39 Berlin, MD 21811 3 P59 Bunting, Gerald W. 11725 Assateaque Road 1.18 Berlin, MD 21811 4 P309 Coates, Raymond D. P.O. Box 366 34.93 Berlin, MD 21811 5 P243 Coates, Raymond D. P.O. Box 366 0.45 Berlin, MD 21811 6 P244 Coates, Raymond D. P.O. Box 366 20,000 S.F. Berlin, MD 21811 7 P93 Parkel Corp. P.O. Box 691 73.30 Berlin, MD 21811 8 P101 Gordon, Charles H. 6407 Heritage Road 33,628 S.F. Berlin, MD 21811 9 P337 Berlin Vol. Fire 214 North Main Street 1.45 Co., Inc. Berlin, MD 21811 10 P129 Coates, Raymond D. P.O. Box 366 2.00 Berlin, MD 21811 11 P131 Byrd, C. Ames 200 Market Street 6.49 Pocomoke, MD 21851 12 P1:27 White Company, Inc. Rt 3, Box 352 2.00 Berlin, MD 21811 13 P126 Weinstein, Morris P.O. Box 6021 2.00 Baltimore, MD 21231 14 P125 Purnell, Major Showell Rt 2, Box 303 2.00 Berlin, MD 21811 -75- 15 P124 Fuller, Edith Rt 2, Box 347 2.00 Berlin, MD 21811 16 P207 Purnell, Gary Rt 2, Box 300 25,571 S.F. Berlin, MD 21811 17 P128 Tea-lite CWpany' Inc. Rt 3, Box 352 1.00 Berlin, MD 21811 is P72 Pitts, Iola P. P.O. Box 294 7.62 Berlin, MD 21811 19 P283 Massadur, Clementine S. 8544 Lewis Road 1.00 Berlin, MD 21811 20 P327 Taylor, Rcbert Rt. 2, Box 306 1.63 Berlin, MD 21811 21- P132 Massdin, Thcmas R-1 6.49 Douglasville, PA 19518 22 P336 Parker, Jr., Eugene R. P.O. Box 307 15.20 Ocean City, MD 21842 23 P335 Parkel Corp. P.O. BOX 691 .8.90 Berlin, MD 21811 24 P341 Lane, David R. 3613 Ocean Pines 1.74 Berlin, MD 21811 25 P135 Fooks, Levin 8555 Stephen Decatur Hwy 5.94 Berlin, MD 21811 26 P229 Duffy, Larry E. P.O. Box 353 2.49 Berlin, MD 21811 27 P134 Henry, Milford Rt 4, Box 175 4.50 Berlin, MD 21811 28 P68 Davis, William F. Rt 2, Box 307 7.80 Berlin, MD 21811 29 P139 Fassett, George A., Heirs 6822 Eastridge Road 7.00 Baltimore, MD 21207 30 P149 Ocean-McLean, Inc. C/O ion Utley 43.30 McLean, VA 22101 31 P332 Purnell, Owens F. Rt 2, Box 454 5.00 Berlin, MD 21811 -76- 32 P342 Unknown 33 P342 Unknown 34 P22 Henry, Clifton 0. Rt 2, Box 314 25.00 Berlin, MD 21811 35 P24 Purnell, Gary C. Rt 2, Box 300 2.00 Berlin, MD 21811 36 P23 Reed, Jr., Gary A. P.O. Box 2116 1.04 Ocean City, MD 21842 38 P21 Purnell, Leon 8747 Lewis Road 1.00 Berlin, MD 21811 39 P20 Purnell, Willie E. 40 Rodney Tingle 1.00 Berlin, MD 21811 40 P19 Histed, Ara M. 1869 Red Lion Road 4.49 Baer, DE 19701 41 P204 Davis, Rosetta Rt 2, Box 318 0.43 Berlin, MD 21811 42 P230 Shockley, William D. 11211 Assateaque Road 0.18 Berlin, MD 21811 43 P18 Showell, Ann M. P.O. Box 190 1.00 Ocean City, MD 21842 44 P17 Showell, Am M. P.O. Box 190 1.00 Ocean City, MD 21842 45 P16 Showell, Am M. P.O. Box 190 0.75 Ocean City, MD 21842 46 P15 Showell, Arm M. P.O. Box 190 1.50 Ocean City, MD 21842 47 P123 St. Johns M.E. Church RFD 1.00 Berlin, MD 21811 48 P122 Ocean City P.O. Box 158 31.00 Ocean City, MD 21842 49 Pi Massey, Isaac L Rt 2, Box 331 47.50 Berlin, MD 21811 -77- 50 P141 Purnell, Ruby L. Rt 2, Box 321A 1.25 Berlin, MD 21811 51 P318 Purnell, Franklin C/o Catherine Wise 10.00 Berlin, MD 21811 52 P140 Henry, Clifton 0. Rt 2, Box 314 1.95 Berlin, MD 21811 53 P130 Shockley, Betty M. Rt 2, Box 177A 1.99 Berlin, MD 21811 54 P285 Derrickson, Russell S. 8740 Lewis Road 1.00 Berlin, MD 21811 55 P137 Fooks, Lmibert 8541 Libertytown Road 5.00 Berlin, MD 21811 56 P138 Rounds, Violet 8743 Stephen Decautur Hwy 6.87 Berlin, MD 21811 57 P316 Owens, T-aree P. 1426 Wistar Drive 5.00 Wyncote, PA 19095 58 SHA Unknown 59 P148 Rety, Frank S. Rt 2, Box 449 2.16 Berlin, MD 21811 60 P25 Smith, Stanford L. 8760 Stephen Decatur Hwy 2.91 Berlin, MD 21811 61 P333 Smith, Stanford L. Rt 2, Box 381 1.00 Berlin, MD 21811 62 P147 Purnell, Hollis L. Rt 2, Box 384 9.00 Berlin, MD 21811 - 64 P26 Eastin, William 3517 Endman Avenue 52.57 Baltimore, MD 21213 65 P121 Owens, Laree P. 1426 Wistak Drive 10.00 And Others Wyncote, PA 19095 66 P142 ATLANC0 Limited Box 747 50.00 Partnership #3 Bolling Green, VA 22427 67 P3 ATIANCO Limited Box 747 94.00 Partnership #3 Bolling Green, VA 22427 -78- 68 P143 Collins, Thomas H., 9300 A 1A Suite 201 63.00 Vero Beach, FL 32963 69 P210 Purnell, Venson P. 12026 Sinepuxent Road 2.00 Berlin, MD 21811 70 P117 Smith, Charles 0. 1762 Belle Court 0.55 Millersville, MD 21108 71 P146 Robertson, Charles A. Rt 2, Box 374 25,524 S.F. Berlin, MD 21811 72 P145 Robertson, Charles A. Rt 2, Box 374 0.51 Berlin, MD 21811 73 P7 Marfori, Ramon P. 109 Clark Street 0.4 2 Salisbury, MD 21801 74 P4 Griffin, Reginald 8915 Stephen Decatur Hwy 2.07 Berlin, MD 21811 75 P5 Luthardt, Charles J. 1824 Superior Avenue 0.32 Baltimore, MD 21227 78 P6 Ingraham, Frank B. 111 Brenner Drive .0.64 Newark, DE 19713 79 P8 Griffin, Reginald 8915 Stephen Decatur Hwy 0.85 Berlin, MD 21811 go P9 Clubb, Lillian B. 8915 Stephen Decatur Hwy 0.28 Berlin, MD 21811 81 P10 Steen, Jr., Rudolph 929 Lombardee Circle 0.78 Glen Burnie, MD 21061 82 P144 Truitt, w. Bond 202 W. Federal Street 0.58 Snow Hill, MD 21863 83 P11 Taylor, Preston D. Rt 2, Box 372 1.55 Berlin, MD 21811 84 P213 Anderson, Kenneth P. 246 Indian knoll Road 0.96 Ocean City, MD 21842 85 P263 ncter, Gerald A. Rt 2, Box 375 2.60 Berlin, MD 21811 86 P295 Charles, Paul T. P.O. Box 1229 2.59 Ocean City, MD 21842 87 P115 Unknown -79- 88 P119 Cutler, Howard H. 316-C Franklin Place 1.00 Plainfield, NJ 07060 89 P118 Eunice Elliott Hudson 9017 Stephen Decatur Hwy 14.17 For Life Berlin, MD 21811 90 P205 Elliott, William B. Rt 2, Box 452 2.36 Berlin, MD 21811 91 P300 Collins, Thomas H. 9300 AlA Suite 201 2.63 Vero Beach, FL 32963 98 P308 Birch, Victor H. 12217 Sinepuxent Road 11.95 Berlin, MD 21811 145 P339 Tariq, Sheikh M. P.O. Box 702 1.00 Berlin, MD 21811 146 P278 Peters, George 503 Lark Drive 0.64 Newark, DE 19711 147 P27 Griffin, Reginald 1. 8915 Stephen Dec atur Hwy 3.49 Berlin, MD 21811 TAX MAP 26 93 P257 Turner, William C. 125 8th Street 26.00 Pocmioke, MD 21851 94 P284 Davis, John W. 11805 Sinepuxent Road 2.00 Berlin, MD 21811 95 P283 Davis, John W. 11805 Sinepuxent Road 1.00 Berlin, MD 21811 96 P218 Davis, Theodore E. Box 255, Cedar Lane 2.00 Fruitland, MD 21826 97 P391 Northam, Mildred K. P.O. Box 7 2.18 Ocean City, MD 21842 99 P367 Birch, Victor H. 12217 Sinepuxent Road 8.50 Berlin, MD 21811 100 P374 Rigas, Christopher J. P.O. Box 801 0.89 Berryville, VA 22611 101 P418 Birch, Victor H. 12217 Sinepuxent Road 11.73 Par D Berlin, MD 21811 -80- 102 P31 Birch, Victor H. 12217 Sinepuxent Road 22.48 Par C Berlin, MD 21811 103 P268 Hastings, Marion L. 219 Broad Street 108.00 Berlin, MD 21811 104 P220 Meneley, Wendel W. P.O. Box 1356 4.00 Ocean City, MD 21842 105 P339 Holland, Robert L. 9209 Stephen Decatur Hwy 4.46 Berlin, MD 21811 106 P221 Dennis, John H. Rt 2, Box 353 1.53 Berlin, MD 21811 107 P222 Henry, Samuel S. Rt 2, Box 354 1.00 Berlin, MD 21811 108 P407-2. Sherwanick, Lawrence 7878 Howard Road 5.78 Baltimore, MD 21222 109 P407-2 Hargley, Arden H. Rt 2, Box 361 6.00 Berlin, MD 21811 110 P407-3 Hydock, Mary P. 128 S. Franklin Street @6.00 Allentown, PA 18102 111 P407-4 Neeley, Marion Rt 2, Box 363 6.60 Berlin, MD 21811 112 P407-5 Spennenweber, Harry J. 8153 Orchard Point Road 6.80 Pasedena, MD 21122 113 P348 Sapperstein, Mark C. P.O. Box 21525 3.10 Baltimore, MD 21208 114 P349 Sapperstein, Mark C. P.O. Box 21525 2.69 Baltimore, MD 21208 115 P340 Potts, Bernard 3206 Medfield Road 1.67 Baltimore, MD 21208 116 P211 Lyons, Edward P. 2909 Edgewater Drive 2.62 Edgewater, MD 21037 117 P275 Patton, Thanas J. P.O. Box 578 9.59 Berlin, MD 21811 118 P269 Purnell, Sarah L., P.O. Box 120 200.00 ly/T, Etal Ocean City, MD 21842 119 P382 Falzone, Edward R-1019 Taylor Ave 0.92 Scranton, PA 18510 -81- 120 P286 Falzone, Salvatore P. P.O. Box 22 2.40 Dunmore, PA 18512 121 P381 Falzone, Joseph 211 Elizabeth Street 2.36 Dumore, PA 18512 122 P417 Evalls' Emil C. 9639 Stephen Decatur Hwy 21.70 Berlin, MD 21811 123 P273 Evans, Emil C. 9639 Stephen Decatur Hwy 1.00 Berlin, M 21811 124 P135 Shoreline Associates C/O Herbert O'Connor 32.00 Towson, MD 21204 - 125 P289 Chesapeake Enter.,Inc. P.O. Box 18525 10.34 Baltimore, MD 21240 126 P288 Disharoon, W. Robert 6953 Gunning Club Lane 39.90 Newark, MD 21841 -1.27 P361 'Schrawder, Lawrence 0. Harbor Road 10.00 ocean City, MD 21842 128 P274 Taylor, Robert J., Etal 4473 Que Street 39.67 Par 3A Washington, D.C. 20007 129 P274 Whitlock, Lawrence T. Rt 2, Box 239 1.31 Par 2 Berlin, MD 21811 130 P274 Parker, Eugene R., Jr. P.O. Box 307 1.84 Par 3-B ocean City, MD 21842 131 P274 Parker, Eugene R., Jr. P.O. Box 307 5.66 Par 1-A ocean City, MD 21842 132 P274 South Point Indoor Club 9529 Stephen Decatur Hwy Par 2-A ocean City, MD 21842 132 P424 Taylor, Howard L. P.O. Box 164 0.98 Par 1 ocean City, MD 21842 133 P424 Birch, Paul P.O. Box 117 0.95 Par 2 Secretary, MD 21664 134 P424 Birch, Louis N. P.O. Box 164 2.73 Par 3 ocean City, MD 21842 135 P291 Schrowder, Lawrence 0. Harbor Road 0.31 - ocean City, MD 21842 136 P292 Collins, Kath:ryne L. 9601 Stephen Decatur Hwy 2.41 Berlin, MD 21811 -82- 137 P290 Cassidy, John T. 612 Twin Tree Road 42.00 Salisbury, MD 21801 138 P208 Pagliewani, Louie P.O. Box 1150 6.02 Ocean City, MD 21842 139 P358 Unknown 140 P69 Fisher, Philip E. 11635 Assateaque Road 7.33 Berlin, MD 21811 141 P365 Wood, Dean 4632 Deer Spring Road 1.00 Braddock Heights, MD 21714 142 P219 Snell, Andrew Rt 2, Box 349 1.02 Berlin, MD 21811 143 P217 Bounds, Yatherine J. Rt 2, Box 3 3 3 91.25 Berlin, MD 21811 144 P285 Hastings, Marion L. 219 Broad Street 6.00 Berlin, MD 21811 -83- OWNEI=P OF PROPERTY IN S7JDY AREA NUMBER PARCEL OWNERS' NAME 84 P213 Al-iderson, Kenneth P. 66 P142 ATLANCO Limited Partnership #3 67 P3 ATLANCO Limited Partnership #3 9 P337 Berlin Vol. Fire Co., Inc. 134 P424, Par 3 Birch, Louis N. 133 P424, Par 2 Birch, Paul 98 P308 Birch, Victor H. 102 P31, Par C Birch, Victor H. 99 P367 Birch, Victor H. 101 P418, Par D Birch, Victor H. 143 P217 Bounds, Katherine J. 3 P59 Bunting, Gerald W. 11 P131 Byrd, C. Aines, 137 P290 Cassidy, John T. 86 P295 Charles, Paul T. 125 P289 Chesapeake Enter.,Inc. 80 P9 Clubb, Lillian B. 10 P129 Coates, Raymond D. 5 P243 Coates, Raymond D. 6 P244 Coates, Raymond D. 4 P309 Coates, Raymond D. 1 P71 Coates, Raymond D. 136 P292 Collins, Kathryne L. 91 P300 Collins, Thomas H. 68 P143 Collins, Thomas H., Etal 88 P119 Cutler, Howard H. 95 P283 Davis, John W. 94 P284 Davis, John W. 41 P204 Davis, Rosetta 96 P218 Davis, Theodore E. 28 P68 Davis, William F. 106 P221 Dennis, John H. 54 P285 Derrickson, Russell S. 126 P288 Disharoon, W. Robert 26 P229 Duffy, Larry E. 64 P26 Eastin, William S. 90 P205 Elliott, William B. 89 P118 Eunice Elliott Hudson For Life 123 P273 Evans, Emil C. 122 P417 Evans, Errdl C. 85 P263 Exter, Gerald A. 119 P382 Falzone, Edward 121 P381 Falzone, Joseph 120 P286 Falzone, Salvatore P. -84- 29 P139 Fassett, George A., Heirs 140 P69 Fisher, Philip E. 55 P137 Fooks, Lambert 25 P135 Fooks, Levin 15 P124 Fuller, Edith 8 P101 Gordon, Charles H. 74 P4 Griffin, Reginald 79 P8 Griffin, Reginald 147 P27 Griffin, Regh-iald I. 109 P407-2 Hargley, Arden H- 103 P268 Hastings, Marion L. 144 P285 Hastings, Marion L. 2 P70 Hastings, Russell L. 52 P140 Henry, Clifton 0. 34 P22 Henry, Clifton 0. 27 P134 Henry, Milford 107 P222 Henry, Samuel S. 40 P19 Histed, Ara M. 105 P339 Holland, Robert L. 110 P407-3 Hydock, Mary P. 78 P6 Ingraham, Frank B. 24 P341 Lane, David R. 75 P5 Luthardt, Charles J. 116 P211 Lyons, Edward P. 73 P7 Marfori, Ramon P. 19 P283 Massadur, Clementine S. 21 P132 Massdin, Tharas 49 Pi Massey, Isaac L 104 P220 Meneley, Wendel W. 111 P407-4 Neeley, Marion 97 P391 Northam, Mildred K. 48 P122 Ocean City 30 P149 Ocean-McLean, Inc. 57 P316 Owens, Laree P. 65 1 P121 Owens, Laree P. And Others 138 P208 Pagliewani, Louie 23 P335 Parkel Corp. 7 P93 Parkel Corp. 131 P274, Par 1A Parker, Eugene R., Jr. 130 P274, Par 3B Parker, Eugene R., Jr. 22 P336 Parker, Jr., Eugene R. 117 P275 Patton, Thanas J. 146 P278 Peters, George 18 IY72 Pitts, Iola P. 115 P340 Potts, Bernard 51 P318 Purnell, Franklin 16 P207 Purnell, Gary 35 P24 Purnell, Gary C. 62 P147 Purnell, Hollis L. 38 P21 Purnell, Leon 14 P125 Purnell, Major Showell 31 P332 Purnell, Owens F. 50 P141 Purnell, Ruby L. M -85- 118 P269 Purnell, Sarah L., L/T, Etal 69 P210 Purnell, Venson P. 39 P20 Purnell, Willie E. 36 P23 Reed, Jr., Gary A. 59 P148 Rety, Frank S. 100 P374 Rigas, Christopher J. 72 P145 Robertson, Charles A. 71 P146 Robertson, Charles A. 56 P138 Rounds, Violet 113 P348 Sapperstein, Mark C. 114 P349 Sapperstein, Mark C. 127 P361 Schrawder, Lawrence 0. 135 P291 Schrowder, Lawrence 0. 108 P407-1. Sherwanick, Lawrence 53 P130 Shockley, Betty M- 42 P230 Shockley, William D. 124 P135 Shoreline Associates 46 P15 Showell, Ann M. 45 P16 Showell, Ann M. 44 P17 Showell, Ann M. 43 P18 Showell, Am M. 70 P117 Smith, Charles 0. 60 P25 Smith, Stanford L. 61 P333 Smith, Stanford L. 142 P219 Snell, Andrew 132 P274, Par 2A South Point Indoor Club 112 P407-5 Spennenweber, Harry J. 81 Plo Steen, Jr., Rudolph 47 P123 St. Johns M.E. Church 145 P339 Tariq, Sheikh M. 132 P424, Par 1 Taylor, Howard L. 83 Pli Taylor, Preston D. 20 P327 Taylor, Robert 128 P274, Par 3A Taylor, Robert J., Etal 82 P144 Truitt, w. Bond 93 P257 Turner, William C. 87 P115 Unknown 33 P342 Unknown 32 P342 Unknown 139 P358 Unknown 58 SHA Unknown 13 P126 Weinstein, Morris 12 P127 White Canpany, Inc. 17 P128 WI-d-te C.-ourpe-my, Inc. 129 P274, Par 2 Whitlock, Lawrence T. 141 P365 Wood, Dean -86- OWNERSHIP OF PROPERTY IN OCEAN CITY ACIRPORT AREA NUMBER PARCE OWNERS' NAME OWNERS' ADDRESS ACRES TAX MAP 33 1 P26 Eastin, Wi-lliam. S. 3517 Erdman Avenue 51.40 Baltimore, MD 21213 2 P37 Cadden, Alfred H. 1742 Johnson Street 0 .88 Baltimore, MD 21230 3 P153 Pierce, Sr., David H. Rt 2, Box 505 1.53 Berlin, MD 21811 4 P28 Assateaque Mobile Sport P.O. Box 149 9.62 Fish Sherman Association Berlin, MD 21811 5 P266 Purnell, Owens F. Rt 2, Box 454 8.19 Berlin, MD 21811 6 P32 Ocean City P.O. Box 158 24.5.00 P154 Ocean City, MD 21842 40.00 7 P118 Eunice Elliott Hudson 9017 Stephen Decatur Hwy 14.17 For Life Berlin, MD 21811 8 P155 Bennett, Lercy 533 N Potomac Street 3.10 Baltimore, MD 21205 9 P325 Hose, Jr., Charles Rt 9, Box 152 1.01 York, PA 17402 10 P322D Adams, Evelyn M. 1354 Williams Road 4.15 York, PA 17402 11 P322C Deem, Sr., Michael J. 12249 Eagles Nest Road 5.00 Berlin, MD 21811 12 P322B Neighoff, Charles V. 1911 Guy Way 4.68 Baltimore, MD 21222 13 P322A Aldinger, Charles S. 485 Pinehurst Road 4.06 York, PA 17402 14 P13 Birch, Victor H. 12217 Sinepuxent Road 35.03 Berlin, MD 21811 15 P113 Ocean City P.O. Box 158 50.97 Ocean City, MD 21842 -87- 16 P315 Bayridge Marina, Inc. Rt 2, Box 480 41.95 Berlin, MD 21811 17 P33 Eagles Nest, Inc. 12612 Eagles Nest Drive 23.90 Berlin, MD 21811 18 P36 Dondero, Charles A. P.O. Box 309 3.40 Ocean City, MD 21842 19 P32 Ocean City P.O. Box 158 245.00 Ocean City, MD 21842 21 P3 Atlanco Limited Ptnrshp Box 747 94.00 Bolling Green, VA 22427 22 P235 Bayridge Marina, Inc. Rt 2, Box 480 4.70 Berlin, MD 21811 TAX MAP 34 23 Pi Batson, David R. 4208 Glenridge Street 7.30 Kensirxgton, MD 20795 24 P5 Unknown 25 P14 Oman city P.O. Box 158 182.00 Ocean City, MD 21842 TAX MAP 26 26 P254 Ocean City P.O. Box 158 38.64 Ocean City, MD 21842 27 P243 Hageman, Ruth M. 1835 Phelps Place, NW 15.39 Washington, DC 20008 28 P341 Mystic Harbor Corp. C/O Douglas Buttner 226.20 Baltimore, MD 21203 30 P331 Ocean City P.O. Box 158 43.37 Ocean City, MD 21842 TAX MAP 27 29 P442 Rt 611, Ltd. Ptnrsbp C/o Robert Taylor 100.00 Washington, DC 20007 -88- =4ERSHIP OF PROPEMY IN OCEAN C= A-=ORT AREA NUMBER PARCEL CXINEPS I bIAME 10 P322D Adams, Evelyn M. 13 P322A Aldinger, Charles S. 4 P211 Assateaque Mobile Sport Fish Sherman Association 21 P3 Atlanco Limted Partnership #3 23 PI Batson, David R. 22 P235 Bayridge marina, inc. 16 P315 Bayridge Marina, Inc. 8 P155 Bennett, lexoy 14 P13 Birch, Victor H. 2 P37 Cadden, Alfred H. 11 P322C Deem, Sr., Michael J. 18 P36 Dondero, Charles A. 17 P33 Eagles Nest, Inc. 1 P26 Eastin, William S. 7 P118 Eunice Elliott Hudson For Life 27 P243 Hageman, Ibith M. 9 P325 Hose, Jr., Charles 28 P341 Mystic Harbor Corp. 12 P322B Neighoff, Charles V. 15 P113 Ocean City 25 P14 Ocean City 26 P254 Ocean city 19 P32 Ocean city 6 P32, P154 Ocean City 30 P331 Ocean City 3 P153 Pierce, Sr., David H. 5 P266 Purnell, Owens F. 29 P442 Rt 611, Ltd. Ptnrshp 24 P5 Unknown -89- REOMMMAMONS/0ONCIMIMS FICR CONSIEERMON 1. land use changes should be limited until adequate stormwater conveyance systein is provided, including water quality protection. 2. Rezoning should be according to specific land capabilities with areas, too wet or without adequate drainage being zoned conservation (Partial rezoning out as a concept). 3. P.D.A. or P.W.A. could be used to solve drainage and stormwater management problems. 4. Easements for waterways and stornwater facilities must be acquired including maintenance agreements - 5. Airport expansion plans need to be clearly outlined and zoning used to protect the public as well as the airport. A total relocation of airport may be the best possible solution. Soils and wetlands must be taken into consideration. A joint ocean City County Study should be initiated. 6. Sewage disposal is of major concern on soils (77 percent Hydric) with severe limitations. If plans are to develop these sites, a central water and sewage disposal system should be a priority. Cost of installation could be applied to the tax base of properties affected. 7. Existing drainage is poor and unsuitable for any further development without modification to improve the surface water conveyance system and installation of stormwater storage facilities. 8. County should limit development due to the environmentally sensitive soils (77 percent Hydric) and the high value of the area to the county recreational atmosphere- 9. The rural characteristic of this sensitive watershed will be beneficial to maintain to preserve the attraction of the nearby state and federal parks. 10. Development for the region will be more cost effective if sewage disposal is directed to existing waste water treatment facilities of West Ocean City and Berlin. 11. The low lying areas will be more econanically cost effective preserved in its relatively rural nature. A basis for the existing recreational resources and for expansion of future recreational tourism dictates consideration of maintenance of the Ayer Creek Shoreline in agriculture and conservation. 12. If development is permitted without inprovement of outlets, 100 percent on site stormwater storage with very slow release rates should be considered. 13. Channels designed to convey a given storm event will degrade if an approved maintenance plan is not implemented. Channels should be inspected once a year and required maintenance performed to maintain the design capacity. land ea *ements should be provided by the developer and maintenance cost borne by the developer. -90- 14. A new instrument of legal responsibility for maintenance needs to be used. P.D.A. and P.W.A. are good vehicles to solve problems and perform maintenance, however, these organizations can be disbanded whenever the members decide it may be in their best interest to do so. It ray be necessary to record with property deeds of the beneficiaries this legal responsibility for maintenance when man made modification of outlets is performed. 15. on site sewage disposal could impact existing shallow wells. Proposed sewage systems should assess impacts and identify responsibility for contamination where it may be induced. 16. If this study area was fully developed, 72 acre feet of storage would be required. Less than five percent of soils are suitable for infiltration thus storage on the other soils would have to be provided above the high water table and released at a 2 year pre storm event. 17. Worcester County may need to adopt a stormwater management policy that will reinove pollutants in an economical and environmental sound way. In'order to achieve this goal, incentives such as tax breaks may be considered. -91- USUM OF Rl&'V=CN RKMIOGY D.A. Drainage Area AC. FT. Acre Feet C.F.S. Cubic Feet Per Second V Velocity Ft./Sec. Feet Per Second SS Side Slopes RCN Rmof f Curve Mzixex Pre Previous Condition Post Future Condition MSL Mean Sea Level Sq. Ft. Square Feet N Roughness Factor D Hydraulic Depth B Bottom Width R Hydraulic Radius WP, Wetted Perimeter P. D. A. Public Drainage Association P.W.A. Public Watershed Association Qr Required C.F.S. Qd Designed C.F.S. AV Area Times Velocity TR-55 Technical Release Number 55 Q Runoff in C.F.S. L. F. Linear Feet BIP Bermed Infiltration Pond Freeboard Dif ferenoee Between Designed High Water Arid a Control Point Kd Conveyance Method 0 S 1/2 S Slope in Ft./Ft. S 1/2 1/2 is the Power of the Slope -92- ~0 AC~q2~q2~q10WIEDG~4qEMEN~qr~4qN u. s. Depar~8qt~qzent of Agriculture, soil conservation Service Worcester County Drainage Co~lT~imittee Maryland Depar~4qt-~nent of Agriculture, Worcester County Worcester Soil Conservation District Worcester County Roads Depar~8qt~qr~ient Worcester County Plann~0qu-~4qq and Zo~0qn~0qu~0qq Worceste~0qx County Park and Recreation Depart~qw~qmt Worcester County Health Departr~qent Maryland State Highway Administration, Worcester County Federal Aviation Administration, Salisbury Airport -93- NOAA COASTAL SERVICES CTR LIBRARY . 1 111111111 3 6668 --141114 1 9 , p p 6 6 IN 11 0 1 1 1