[From the U.S. Government Printing Office, www.gpo.gov]
ALABAMA SHORELINE CHANGE RATES:
1970-1993


Tina A. Sanchez & Scott L. Douglass
College of Engineering Report No. 94-1






Department of Civil Engineering
University of South Alabama
Mobile, Alabama 36688


prepared for
Coastal Programs Office
Alabama Department of Economic and Community Affairs
401 Adams Avenue
Montgomery, Alabama 36103-5690



July, 1994
US Department of Comaerce
NoA Coastal Services Center Librar
2234 South Hobson Avenue
Charleston, SC  29405-2413

PREFACE
This report was prepared under contract (PED-USA-CZM-93-03)

with the Alabama Department of Economic and Community Affairs

(ADECA) with funding from the Coastal Zone Management Progra-m

(Section 306 of the Coastal Zone Management Act of 1972, as

amended) administered by the National Oceanic and Atmospheric

Administration. The Chief of the Coastal Programs Office of

ADECA was Mr. Gilford C. Gilder. Mr. Phill~ip Hinesley, Planner,

ADECA, was the techinical monitor for the contract. This report

presents the technical results of the study. Other portions of

the study included a limited economic analysis of the value of

the beaches and a proposed framework for a comprehensive

shoreline management plan.

The report was written by Ms. Tina Sanchez, Student

Assistant and Dr. Scott L. Douglass, Assistant Professor of Civil

Engineering at the University of South Alabama.

The report documents a shoreline change analysis of the Gulf

coast beaches of Alabama. Some air photos were purchased from

the archives of the US Army Engineer District, Mobile with

coordination through Mr. Michael Peterson. Some local survey

elevation information was provided by David Volkert and Assoc.

TABLE OF CONTENTS
PREFACE

TABLE OF CONTENTS

INTRODUCTION.......................

METHODS ............................

RESULTS............................

DISCUSSION.........................

SUMMARY............................

APPENDIX A: SHORELINE CHANGE GRAPHS

APPENDIX B: BEACH PROFILES

APPENDIX C: BEACH PROFILE LOCATIONS
ï¿½      ï¿½       ï¿½      .. .. ..
....................... . 1
.... .. .......... .. .. . . .. . . .2



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... . . . . . . . . . . . . . .
. . . . . . .. 1 6

I
INTRODUCTION



One of Alabama's valuable natural resources is the sand that

covers the Gulf Coast shoreline. Since most of the beach sands

are owned by the citizens of Alabama, it is fitting that the

current status of this valuable resource be monitored. This

report outlines the erosion rates found as part of a study to

develop a rational, comprehensive approach to shoreline

management. The primary goal of this effort was to provide

quantified, reproducible information indicating which areas along

the coast are experiencing shoreline recession, accretion, or

which appear to be relatively stable.

2
METHODS



The data used in this shoreline change study were air photos

and beach profiles. The methods of data collection and analysis

are described below.



AIR PHOTOS



Nine sets of vertical air photos were collected to study

beach changes over 23 years, 1970-1993. Photos taken immediately

after a hurricane were excluded from this photo set in an attempt

to avoid strong bias. The dates and scales of the photo sets are

given in Table 1. The five sets of air photos taken during the

1970's and 1980's were obtained from the archives of the US Army

Engineer District, Mobile. The four sets in the 1990's belong to

the Coastal Zone Management Program of Alabama.

Beach widths were measured at 95 locations along the coast

from arbitrary fixed points (houses, roads, or trees) to the

wetline with calipers and an engineers' scale. Photo scale

corrections were made on a photo-by-photo basis with the 1990

flight assumed as the true scale.

The precision (read to nearest 60th of an inch) of any

individual measurement was half of +1-33 ft. and +/- 7 feet on

the 1:24,000 and 1:4800 scale photo sets, respectively. other

sources of error are due to the interpretation of the wetline;

3
water level fluctuations due to tides, winds, barometric

pressure, and waves; and the photogrammetric errors of tilt and

lens distortion.
Because error estimates are larger in this analysis from

1970-86, shoreline trends would have to be large to be

meaningful. The more precise measurements, 1990-93, allow for

lesser trends to be seen. However, these trends may be less

significant because of the shorter time scale.



LINEAR REGRESSION ANALYSIS OF SHORELIN'E CHANGES



Regression was used for two separate periods of record; 1970
to 1990 and 1990 to 1993. The slope of the regression line is a

estimate of the trend in terms of the amount of beach loss or

gain per year. Positive slope means shoreline accretion.

Negative slope mean shoreline recession or erosion. The

correlation coefficient (r) is a measure of how well the data fit

.the line. A correlatio-n coefficient of r=l would indicate a

perfect linear relationship.





BEACH PROFILES


Beach profiles were surveyed at 22 selected locations along
the Alabama coast at 6 month intervals during the year of this

study. The locations of the profiles are shown in Figure 1.

~ -.,    z1 '1
BEACH PROFILE LOCATIOiNS
BALIDWIN CO.
140BILE SAY




~~~~~~~~O~~DI14Il7DX2?    I

DAUPHIN ISLAND
I848
-TI  '845   -
B41A
B29 834
824
87
B14    819        G       S  -
I
R
0
10
GULF or HCXICO
Fig. I

4
Individual profiles began at Alabama Department of Environmental

Management Construction Control Line monuments whenever Possible.

In this report, these profiles are designated by their ADEM CCL

line number. Seven additional profiles were established as part

of this study in Gulf Shores and are designated with "GS" numbers

(Gulf Shores does not have ADEM CCL numbers).   Elevations of

most of the profiles were tied to the NGVD (National Geodetic

Vertical Datum of 1929) through surveys. ADEM CCL monuments

selected in Baldwin Co. were #48, #45, #41, 434, #29, #24, #14,

#19, V7. Profiles on Dauphin Island were located at ADEM CCL

monuments #32, #27, #17, #14, #10, #2.

The profiles were surveyed from the monument, usually in the

sand dunes, across the beach and out to a depth of 10 feet

whenever possible. Distances were measured by tape on the dry

beach and a tag-line, a rope marked in fifty foot sections, in

the water. A precision surveying level and rod were used to

obtain the elevations. A swimmer carried the rod and tag-line

through the surf.






RESULTS



The shoreline change analysis results for each of the 95

locations are summarized in Figures 2 to 4 and plotted

individually in Appendix A.  Figures 2 to 4 present the linear

regression trend, or slope, in feet of loss or gain per year for

two time periods; 1970-90 and 1990-1993. A trend is showin on

Figures 2 to 7 only if the correlation coefficient (r) was

greater-than 0.5. N'ote that this is not a very restrictive

condition.

Much of the state's coast did not meet this condition for

the 1970-1990 time period.  Accretion was experienced at several

locations; east of Little Lagoon, west of Perdido Pass and at

Gulf Shores. There were some pockets of erosion along Fort

Morgan Peninsula.  Dauphin Island from 1970-1990 experienced

erosion along the East End. The areas around Sandcastle

Condominiums and at -he countr-y club experienced significant

accretion.

Trends from 1990-1993 differ greatly from the 20 year

trends.  Most locations in Baldwin County experienced beach loss.

Two exceptions are west of Litt'le Lagoon and on Morgan Point.

The trends on Dauphin Island continued as they had in the 1970-

1990 period.  The bul-ge in the shoreline planform at the golf

course continued to arow.  Eroslon continues on the east erid of

the island (Coast Guard and Audubon site) and around the fishing

6
pier.
The calculated linear regression values for each of the 95

locations (68 in Baldwin County and 27 on Dauphin Island) are

summarized on Tables 2 and 3. Table 2 gives the linear

regression results from 1970 to 1990. Table 3 gives the linear
regression results from 1990 to 1993.

Appendix A presents more detailed shoreline change data.

The graphs show the measured changes in beach width at 95

locations relative to the measured 1970 width.

ThQ beach profile measuirement results are given in graphical

form in Appendix B.

s
7





DISCUSSIONI


The shoreline change plots indicate that there is much

fluctuation in beach width both in time at a specific location

and along the coast for a sPecific time period. However, some

other general patterns are discernable. In general, the beaches

were receding in the 1990's. in many locations, the 1993 beach

was narrower than at any recorded value in the analysis period,

1970-1993. The shoreline changes are largest near the three

inlets, Perdido Pass, Little Lagoon Pass and Mobile Pass.  Since
the largest shoreline fluctuations are usually found near inlets
along any coastline, the Alabama coast is typical in this regard.

in spite of all the seemingly natural, temporal
fluctuations, some of the greatest changes along the Alabama

coast are directly and indirectly due to human construction

activities. Channel dredging, beachf ills, and the placement and
removal of jetties all affect the natural movement of sand.

There is both shoreline recession and accretion that is

apparently being caused by man at each inlet.

The shoreline changes are discussed by reach below. Each

reach contains 3 to 6 of the air photo analysis locations. This

discussion relates to the plots in Appendix A:

8
BALDWIN COUNTY SHORELINE CHANGE



Perdido Pass Area (1-5~

The beach around Flora-Bama and the Ono Island bridge fluctuated

within +/- 100 feet during the past 23 years.  Both locationis are

near their most narrow in 1993. Changes at Florida Point and

West Jetty show much greater fluctuations. The beach at Florida

Point has lost almost 300 feet of sand since 1986 but was about

this narrow in 1973.  Much of the accretion at West Jetty is due

to periodic placement of dredged sands from sand bypassing

operations in Perdido Pass on and near the beach. Inspection of

the actual air photos shows that some of this dredged sand was

placed on the beach in 1991-1992 and had worked its way to the

West Hilton location by 1993. The previous fluctuations along

these beaches may have also been due to the dredging at the Pass.

The correlation between adjacent beach widths and bypassing

should be considered further.



Orancre Beach Area (6-9)

The beach in this area (from west of the Hilton to just west of

the Winn Dixie shopping center) is experiencing large

fluctuations possibly due to being downdrift of Perdido Pass.

There may be a direct correlation between beach growth and sand

bypassing operations at Perdido Pass. All of the locations have

been receding since 1990. Locations #7, 8, and 9 are at their

9
most narrow since 1970. It is possible that the sand from the

1991-1992 bypassing will move onto these beaches in the next year

or so. The beach widths here in the early 1970's may have been

still adjusting to the construction of the Perdido Pass jetties.





Romar Beach Area (10-13)

The beach in this area has experienced a downward trend in the

nineties but were fairly stable until then.



East Gulf Shores Area (13a-16)

The beach was fairly stable from 1970 to 1990 but has experienced

a significant downward trend since that time. For example, there

was a 100 foot beach loss at the Pavilion between 1990 and 1993.



Central Gulf Shores (17-21)

The beach here continues the pattern found at East Gulf Shores,

relative stability until the narr6wing trend in the 1990's. A

downward trend began between 1986 and 1990 at the Hangout and at

Southern Shores. It continues there as well as at the other

locations between 1990 and 1993. The beach at the Holiday Inn

has experienced large fluctuations gaining and losing 150 feet of

sand since 1970.



Gulf Shores West (22-25)

The beach in this area stayed within +/- 75 feet of the 1970

10
position until 1990 when it developed a more pronounced dOwnward

trend. Lani Kai and Pier 33 experienced losses of 100 and 70

feet respectively.



West of Pier 33 (26-29)

The beach in this area has been relatively stable. Along the

western side of this reach, the beaches appear to have widened in

the 1980's and then lost most of that width since 1990. This

accretion and recession correlates wi-th the construction and

shortening of the pass jetties to the west.



East Little Laaoon (30-32)
The beaches immediately to the east of Little Lagoon pass

fluctuated in width prior to construction of the jetties. This

is probably due to the ephemeral nature of the pass at that time.

After construction of the jetties (1981) the beaches widened

first closest to the jetties and then spreading eastward. This

pattern seems consistent with accretion updrift of a constructed

jetty. Since the jetties were shortened, the beach width

decreased over 150 ft. immediately to the east and lesser

amounts, about 75 ft. to the east. This pattern seems consistent

with what could be expected due to the shortening of the

structure. Thus, the beach width and stability along this coast
has been impacted by the nearby jettiles.

L1
1
west Little Laaoon Pass (33-36)
These beaches experienced erosion during 1980's.  Th e patterni of
erosion is consistent with erosion downdrift of shore
perpendicular structures. This erosion was apparently due to the
Little Lagoon Pass jetties.  Tlwo beachf ilis and the release of

sand from the east when the jetties were shortened in the l990's
have widened the beach.  However, except near the jetties, the

beach width is still about 100 ft narrower than it was in the
1970 's.



West Beach (37-44)
These beaches were getting narrower in the latter 80's and 90's.
The easternmost location (#37) shows some recovery that is
probably due to longshore sand transport from the beachf ill area
to the immediate east.



Pine Beach Area f45-48)
The Pin'e Beach area location ha s experienced much shoreline

position variability. One possible explanation for this behavior
is that shoreline orientation changes here.  it is the most
southerly point (excluding Morgan Point) on the Baldwin County
coast. Thus it might be expected that the shoreline variability
would be greatest where the shoreline is most exposed.  it has
also been postulated that the beach ridges in this area may be
the result of long-term accretion due to cross-shore migration of
sand from the shelf.

12
Edith Hammac (49-521

The beach in this area experienced fluctuations throughout the

study period but was within +/-60 feet of the 1970 width at all

measurement locations in 1993.



Governor's House Area (53-57)

The beach was stable until accretion at all locations in 1986.

This was followed by recession and continued fluctuations

throughout the area.



St. Andrew's Bav Area (58-61)

The beach was stable or accreting until 1991 when all locations

experienced significant losses. There has been some recovery

since then but all locations continue to be more narrow than in

1970. in three years, W. Navy Cove lost the 100 feet gained

during the twenty year accretionary-stable phase.



Fort Moroan Park Area (62-65)

The beaches at the Condos and east end of Fort Morgan State Park

were accreting or stable until 1986. Since 1986 over 100 feet of

beach has been lost at the Condos and at the access street.

Conditions west of the beach access street were eroding or

fluctuating. This spot has lost more than 300 feet of beach

since 1970.

13
Moraan Point

There have been very large shoreline position changes around

Morgan Point. This is consistent with the well-documented

concept that shoreline position fluctuation is greatest near

tidal inlets. These beaches are within the Mobile Pass ebb tidal

shoal system.






DAUPHIN ISLAND BEACHES



East End (1-3)

A major erosional zone begins south of the Sea Lab tennis court.

Continuous beach losses have been occurring in this area since the

1980 's.



Coast Guard Base Area (4-8)

This area has experi-enced more erosion than any other on Dauphin

Island. After some Eluctuations in the 1970's the beach here has

lost a minimum of 250 feet and in some locations as much as 550

feet.



Audubon Place Area (9-12)

The beach at Audubon Place has been fairly stable since 1983.

Thus, this area is :he current western edge of the erosional area

at the Coast Guard site.  This is also the current edge of an

accretional area to the west. From 3 blocks west of Audubon Place

14
to Sandcastle Condominiums the beach is generally accreting as it

fluctuates.



Golf Course Area (13-17)

At 2 blocks west of Sandcastle and at Hole 3 erosional zones are
flanking a significant zone of accretion. A 400 foot bulge in the

shoreline planform has formed south of the golf course at Holes I

and 2. Just west at the country club tennis court the beach has

been fluctuating at +/- 100 feet from 1970 to 1990 and now appears

to be relatively stable at its 1970 width.



Park and Beach Board Pier and Beach Area (18-20)

The beach in this area has experienced erosion since 1976.  The

beach at the pier and west of the pier has lost more than 250 feet

of width.



West of Holiday inn (21-23)
At #21, one block west of Holiday Inn the beach gained sand from

1973 to 1983.  Since then it has lost almost 150 feet of width.

The beaches to the west have experienced fluctuations and were also

at their narrowest in the 1990's.



West End (24-27)
These locations show that the beach from west of Holiday Inn to the

end of the paved road has fluctuated during the past 23 years but

generally shows losses between 0 and -100.  Locations #,s 24-27

15
continued to lose beach between 1990-93.



BEACH PROFILES

The beach profiles show that there was much sand stored in the

primary sand bar system during the 1992-1993 time period. During

the year, this sand volume moved seaward and landward but in most
cases, did not attach to the shore.

Since the air photo analysis showed many locations lost dry

beach width in the 1990s, one logical question is, did sand move

off the dry beach into the bar system? The profiles for the last

of the three years do not indicate the formation of a new bar

system with material from the dry beach.  Unfortunately, profile

surveys that cover the bar prior to 1992 are not available to

further address the question.

16
SUMMARY



The Alabama coast experiences shoreline fluCtuations at

different times in different locations.   The beach changes show

several general patterns. One, many of the beaches did not have a

significant trend in any direction in the 1970s and 1980s.  They

just fluctuated back and forth.   Two, many of the beaches were

eroding during the 1990s.  At many locations,   the beaches are

narrower in 1992-1993 than at any other time in the period of

analysis  (1970-1993) . Three,  the  shoreline  fluctuations  are

largest near the inlets.   Four, some of this fluctuation at the

inlets is due to man's intervention including jetties, beachfills,

and dredging.   The information gained about the sand resource,

particularly the losses in beach width in the 1990s, suggests that

further monitoring at this level is appropriate.

C-I




APPENDIX C - BEACH PROFILE LOCATIONS


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PROFILE NAIE: Windrift Condos, Perdido Key
ï¿½ .  -..               ',                   .
ADEM CONSTRUCTION CONTROL LINE #: 45

STATE PLANE COORDINATES:            X= 488,825.140 ft.
Y= 100,844.567 ft.
ELEVATION: 10 NGVD

DESCRIPTION: The station is located on Perdido Key in a low pass
through the sand dunes near the west side of the Wind Drift
Condominium. From the southwest corner of the west building-N 70
degrees W-73ft. From the northwest corner of the west building-s
55 degrees W-76ft. The station is an aluminum disk set in the top
of a six inch square concrete post, projecting ten inches, and
stamped ADEM B-45 1985.
ONO ISLANO



















N
OLE RIVER


WINORIFT CONOOS
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SHORt[ .LINf





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PROFILE NAIME: Sims Home
ADEM CONSTRUCTION CONTROL LINE #: 41
STATE PLANE COORDINATES:
X= 479,249.115 ft.
Y= 99,050.021 ft.
ELEVATION: 10 NGVD

DESCRIPTION: From the junction of Al. 59 and Al. 182 drive east on
182 for 7.9 miles to Mile Post 14.35 and turn right at Sims
mailbox. The station is located on a low sand dune approximately
100 ft north of the beach.  From a light pole near the beach-s 60
degreesW-57 ft. The station is an aluminum disk set in the top of
a six inch square concrete post, projecting six inches, and stamped
ADEM B-41 1985.








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 PROFILE NAME: Romar Beach Park

ADEM CONSTRUCTION CONTROL LINE #: 34
STATE PLANE COORDINATES:
X= 466,038.578 ft.
Y=  95,534.410 ft
ELEVATION: 15 NGVD

DESCRIPTION: The station is located on the side of a sand dune near
the southwest corner of the paved parking lot and approximately 100
ft. north of the beach.   From the southwest corner of the paved
parking lot-West-20.3 ft. From a four-inch square concrete post-S
85 degrees W-62.9 ft. The station is an aluminum disk set in the
top of a six inch square concrete post, projecting ten inches, and
stamped ADEM B-34 1985.

















HWY 182

------------- I r__' __
ROMAR BEAC-1 PAkK
-3 -34        I

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:	. .; -0 ;':   .  .   ..., v    :,  ' - .
PROFILE NAME:	Giilf Shores State Park Pavilion

ADEM CONSTRUCTION CONTROL LINE #: 29

STATE PLANE -COORDINATES:         X= 454,188.522
Y=  92,349.654
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ELEVATION: 5.96 NGVD

DESCRIPTION: The station is located in the Gulf State Park
approximately 250 ft. north of the beach.  From the east edge of
the wood walkway-N 70ï¿½ E-80ft.  From the southeast corner of the
wood walkway-N 25 degrees E-98ft.  From a light pole at the south
edge of the parking lot-S 05 degrees W-149ft.  The station is an
aluminum disk set in the top of a sixteen-inch square concrete
post, projecting eighteen inches, and stamped ADEM B-29 1985.






















GULF SHORES STATE PARK
HVA 182



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PAVl.tON
B-29
SHORELINE



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PROFILE NAME: Gulf  Shores State Park Convention Center

ADEM CONSTRUCTION CONTROL LINE #: 24
STATE PLANE COORDINATES:
X= 448,325.619 ft.
Y=  90,757.219 ft.
ELEVATION: 9.6 NGVD

DESCRIPTION: The station is located near the southwest corner of
the Gulf State Park Convention Center outside the concrete seawall
From the curved concrete seawall-S 10 degrees E-4.9ft.
From the southwest corner of a porch at the southwest corner of the
Convention Center-SlO  degrees  E-37.8  ft.   The station  is  an
aluminum disk set in the top of a six inch square concrete post,
projecting six inches, and stamped ADEM B-24 1985.


























GULF SHORES STATE PARe



CONVENTION CENTFS R         -

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PROFILE NAME: Holiday Inn, Gulf Shores

BENCHMARK #: G.S. 1

ELEVATION: 4.24 NGVD

DESCRIPTION: Benchmark is top corner (SE) of top step at base of
vertical wall at Holiday Inn.


























HVY t182






HOLIDOAY INN                           '

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SOPORELINE




PROFILE NAME: Main 'B'each, Gulf Shores

BENCHEARK G#: ..G. S. 2

ELEVATION: 10.3 NGVD
C-9
DESCRIPTION:  Benchmark is top of aluminum seawall in front of
second light pole (#481) east of main beach pavilion.
HWY 5S
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SIHORELINE


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PROFILE NAME: Edgewater Condos

BENCHMARK #: G.S. 3

ELEVATION: 7 NGVD

DESCRIPTION: Benchmark is SW corner of aluminum bulkhead b
wooden rail.





























THE COVE
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SHiORPEl.tNt




PROFILE NAME: 1285 West Beach Blvd.; East of Pass

BENCHMARK #: G.S. 4
C-11
ELEVATION: 6.7 NGVD

DESCRIPTION: Benchmark is located on edge of highway approximately
1 mile east of Little Lagoon Pass between 1285 and 1289 West Beach
Blvd.









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PROFILE NAME: 1557 West Beach Blvd. (East of Pass)

BENCHMARK #: G.S. 5
ELEVATION: 6.9 NGVD

DESCRIPTION: Benchmark is located on edge of highway
1500 feet east of Little Lagoon Pass.



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  1557 WEST BEACH BLVD
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SHORELINE

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PROFILE NAME: 1881 West Beach Blvd.

BENCHEARK #: G.S. 6

ELEVATION: 9.98 NGVD

DESCRIPTION: Benchmark is located on edge of highway 2500 feet west
of Little Lagoon Pass.

















LITTLE LAGOON
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GS i     a	1O81 wEST 8EACH e8VO





SHOREtINE
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PROFILE NAME: 2361 West Beach Blvd.

BENCHMARK #: G.S. 7

ELEVATION: 6.05 NGVD
DESCRIPTION: Benchmark is located on edge of highway 8500 feet west
of Little Lagoon Pass.  Line is parallel to side of house to west.
I
LITTLE LAGOON

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2361 WEST BEACH SLVD







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PROFILE NAME: Bon Secour Wildlife Refuge

CONSTRUCTION CONTROL LINE #: 19
STATE PLANE COORDINATES:
X= 396,624.613
Y=  83,299.904
ELEVATION: 14 NGVD

DESCRIPTION: Drive west from Al. 59 and Al. 180 for 9.05 miles to
Mile Post 11.9 turn left at "Dunes Lakes East Boundary" sign drive
south 1.35 miles to the end of the road, then walk for .25 mile to
the station. The station is located near the southwest corner of
a  National  Wildlife  Refuge  on  top  of  a  small  sand  dune
apporximately 175 feet north of the beach and approximately 550
feet east of a 100 foot radio tower. The station is an aluminum
disk set in the top of a six-inch square concrete post, projecting
six inches, and stamped ADEM B-19 1985.
80N SECOUR WrLOtIFE REFUGE






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PROFILE NAME: Cabana Beach	'
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CONSTRUCTION CONTROL LINE #: 14    -                     .

STATE PLANE COORDINATES        X= 382,099.449               .
Y=  83,460.299

ELEVATION:  10 to 11 feet NGVD

DESCRIPTION: From A 1.59 and Al. 180 drive west 11.75 miles to Mile
Post 9.2 turn left to Cabana Beach Subdivision and drive southerly
for.3 mile to east-west clay road, turn right and drive west for
.05 mile to the end of the road and a driveway left, turn left and
drive south for .05 mile to the southwest beach house and the
station on the left.  The station is located near the northeast
corner of the southwest beach house. The station is an aluminum
disk set in the top of a six-inch square concrete post, projecting
six inches, and stamped ADEM B-14 1985.

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PROFILE NAME: Fort Morgan Rd., Mile Post 4.6             -'

ADEM CONSTRUCTION CONTROL LINE #: 7

STATE PLANE COORDINATES:            X= 358,262.949
Y=  84,424.908                -

ELEVATION: 9 TO 10 feet NGVD

DESCRIPTION:  From the junction of Al. 59 and Al.  180 in Gulf
Shores, Al.: drive west 16.35 miles. to Mile Post 4.6 and a shell
road left; turn left on the shell road and drive south for .10 mile
to two beach houses and the station behind the one on the right
with a wooden mask on the front.
The station is located near the southwest corner of a frame beach
house with a wooden mask on the front.
From the southwest corner of the porch of the house with the mask-s
10 degrees W-34ft.
From the southeast corner of the porch of the house on the west-
East-6lfEt
From the northeast corner of the house on the west-S-45 degrees E-
84ft.
The station is an aluminum disk set in the top of a six-inch square
concrete post, projecting six inches, and stamped ADEM B-7 1985.










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PROFILE NAME: GronF F,l          -....

ADEM CONSTRUCTION CONTROL LINE 4: 32  ;-:

STATE PLANE COORDINATES: .       x= 317,386. 03
y..  '89, -909'.02
ELEVATION:  5.4 NGVD
DESCRIPTION:   The station is on Dauphin Island Sea Lab property,
approximately 50 ft. N of the Gulf and 300 ft. S of Galathea
Hall, Dauphin Island Sea Lab. The marker is set in a 6"x^-
concrete block with and aluminum disk stamped ADEM DI 32 1986.
The elevation was ï¿½taken from Corps. marker 21D-aB located at
State Plane Coordinates: x = 316,787.303  y = 90,061.148, EL
6.09 NGVD.
DAIUPHTN ISI.AND

SEA LAB
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C-19
PROFILE NAME: Sand Castle Condominiums

ADEM CONSTRUCTION CONTROL LINE #: 27

STATE PLANE COORDINATES:             X = 311,275.88
y = 88,837.93
ELEVATION: 7.2 NGVD

DESCRIPTION: This station is located at Sand Castle Condominiums
at the end of Forney Johnston Drive. The station is
approximately 51 ft. SE of the SE corner of the eastern most
seaward condominum and approximately 100 ft. E of the NE corner
of the swimming pool. The marker is set in a 6"x6" concrete
block with an aluminum disk stamped ADEM DI 27 1986. The
elevation was taken from Corps marker 21D-1F located at State
Plane Coordinates: x = 310,599.731 y = 88,946.689 EL = 7.15
NGVD.


















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PROFILE NAME:  Public Pier & Beach          '

ADEM CONSTRUCTION CONTROL LINE #:	17

STATE PLANE COORDINATES:	X = 301,494.85
Y =  9.0,976.43
ELEVATION:  17.1 NGVD

DESCRIPTION:  This station is located on Dauphin Island Public
Beach property on a large sand dune W of eastern most pavilion
It is approximately 100 ft. N of the Gulf and 175 ft. W of
western most pavilion. The marker is set in a 6"x6" concrete
block with an aluminum disk stamped ADEM DI 17 1986. The
elevation was taken from Corps marker 21D-lU located at State
Plane Coordinates: x = 302,085.424 y = 91,443.011 EL = 17.42
NGVD.
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C-21

PROFILE NAME:  f'6~Ponchartrain Court

ADEM CONSTRUCTION CONTROL LINE #:	14

STATE PLANE COORDINATES:	X = 297,810.57
Y = 91,484.76
ELEVATION: 8.7 NGVD

DESCRIPTION:  This station is located at the end of Ponchartrain
Court 130 ft. SW of the end of the pavement and approximately 50
ft. SW of a palm tree in the front yard of the house named
"Huracan." The marker is set in a 6"x6" concrete block with an
aluminum disk stamped ADEM DI 14 1986. The eleva. ion was taken
from Corps marker 21D-1L located at State Plane Ccordinates: x =
297,858.145 y = 91,712.678   EL = 6.25 NGVD.

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C-22
PROFILE NAME: 2417 Bienville Boulevard
a,
ADEM CONSTRUCTION CONTROL LINE #:  10
STATE PLANE COORDINATES:
X = 291,080.41
Y = 91,500.36
ELEVATION: 6.0 NGVD

DESCRIPTION: This station is located between two houses, one of
the houses being 2417 Bienville Blvd. The monument is 15 ft. 'W
of the blue house (2417 Bienville Blvd.) and 30 ft. E of the grey
house. The marker is set in a 6"x6l concrete block with an
aluminum disk stamped ADEM DI 10 1986. The elevation was taken
from a nearby benchmark furnished by Mr. Showers, a local
surveyor.































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C-23
PROFILE NAME: West End

ADEM CONSTRUCTION CONTROL LINE #: 2

STATE PLANE COORDINATES:             X = 281,726.92
Y = 90,678.82
ELEVATION:  7.1 NGVD

DESCRIPTION: This station is located at the western end of
Bienville Blvd. approximately 140 ft. N of the Gulf, 2 ft. NW of
SW most pile of the newly built house "Tales End", 100 Bienville
Blvd., and approximately 100 ft. S of manhole cover on the S side
of Bienville Blvd.'s end. We believe that this monument was
disturbed in the Fall of 1991, and that it's location should be
resurveyed. The elevation was taken from a nearby benchmark
furnished by Mr. Showers, a local surveyor.
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