Resolution 146-1982
RESOLUTION 146
-1982
WHEREAS, the BOARD OF COUNTY COMMISSIONERS OF MONROE COUNTY,
FLORIDA, has received an application from DONALD W. PORTER
and
WHEREAS, in compliance with State Statute, it is necessary
as part of the permitting procedure to read the following Biological
Assessment into the Record as follows:
The applicant proposes to construct a seawall bulkhead along his
Duck Key property shoreline. The proposed bulkhead will consist
of a poured-in-place, steel-reinforced, concrete seawall with an
8 ft. wide, concrete, cantilevered cap and upland retaining wall.
The 5 ft. overwater cantilever design will be supported by a
series of nine (9), horizontal, concrete beams spaced at 10 ft.
intervals along said seawall structure. The seawall will extend
along the applicant's entire 80 linear foot property shoreline at
the approximate MLW mark. It will connect to the west with an
existing seawall bulkhead of the same design and placement (see
Norris, D.E.R. Permit No. 44-26869-5E; May 14, 1980 for additional
details). Said seawall construction activities will entail the
deposition of 40 cubic yards of backfill stabilization materials
(30+ c.y. landward of MHW; 10+ c.y. waterward of MHW). The stated
purpose of the project is to provide the applicant with a fishing
area and property shoreline stormwater and erosion control.
Personal communications with the applicant's agent (Mr. Timm Reed;
December 10, 1981) have resulted in revising said project to
include boulder riprap placements at the toe of the proposed sea-
wall. This will entail the placement of 25+ cubic yards of riprap
materials waterward of the existing MHW line. This revision (see
attached letter and revised "sheet 6 or 7") was included at the
inspector's request.
The applicant's property is located along the Center Island shore-
line of northeastern Duck Key, Monroe County. At present, Duck
Key is approximately 60 percent developed with existing single
family residences (S.F.R. IS) and various supportive facilities
(roadways, restaurants, marina, motel, stores and various recrea-
tioanl facilities). Most of the existing Duck Key residences are
waterfront (both canal and natural shoreline areas) and equipped
with some type of shoreline bUlkheading/boat docking facilities.
The applicant's property consists of an average-size (0.25+ acres)
residential lot which is bordered to the east by several sImilar
undeveloped lots, to the west by several developed S.F.R. properties,
to the north by Tom's Harbor waters and to the south by Bimini
Drive roadway. Easterly adjacent undeveloped properties have all
been previously cleared and filled and are vegetated solely with a
variable shoreline fringe (Casurina spp. pine, bay cedar and all
mangrove spp. interspersed with patches of various transitional
flora) and upland pioneer grasses and shrubs. The majority of
undeveloped Duck Key shoreline properties are equipped with an old,
variable, boulder riprap revetment. Westerly adjacent properties
are developed with existing, two-story, residences and concrete
seawalls similar to the proposed here. Developed upland property
areas are generally cleared and variously filled (limerock and pea
gravel) and vegetated exclusively with landscaped palms and miscel-
laneous tropical exotics. Tom's Harbor waters in this area are
Class III (Section 17-3.041; F.A.C.), predominantly shallow (less
than 10 ft. deep; MSL), productive (seagrasses and hard corals),
of excellent quality and capable of providing deepwater naviga-
tional access.
~.
J2-f
Resolution
Donald W. Porter
Page Two
The applicant's upland property areas are largely disturbed by
home construction activities which are currently in progress.
Miscellaneous fill piles, construction material and debris are
scattered throughout the property area. As a result, the only
remaining upland vegetation consists of a single Australian pine
tree and miscellaneous pioneer grasses and shrubs. The predominant
upland substrate is mixture of silty sediments and limerock fill
materials.
The project site consists of the applicant's property shoreline and
adjacent submerged lands. The applicant's property shoreline con-
sists of 18 In. ft. of natural, Duck Key/Tom's Harbor shoreline
area. It is also somewhat disturbed by the above-mentioned
construction activities (various rubble and debris depositions).
The majority of the existing fringe vegetation ahs been cleared
(presumably in preparation for seawall construction and lot grading
activities). Remaining shoreline vegetation is therefore limited
to isolated, small buttonwood (Conocarpus erectus) and white
(Laguncularia racemosa) mangroves and bay cedar (Suriana maritima)
bushes and patches of transitional sea purslane (Sesuvium spp.),
seashore saltgrass (Disticlus spp.) and railroad vine (Ipomoea spp.).
Boulder remains of an old, somewhat dilapidated, riprap revetment
are scattered between the approximate MHW and MLW marks. Heavy
detrital accumulations were observed along this entire shoreline
area (to 15~ ft. above the mean water mark).
Inshore submergent areas consist of a firm limerock rubble substrate
with various displaced boulder riprap materials. Varying cerinth
and nerite populations were observed throughout property littoral
areas. Submergent vegetation observed included lush algal growths
(Halimeda, Penicillus, Lorencia, Dictyota spp. and unidentified
reds and browns) and patches of Thalassia and Halodule spp. seagrass.
Hard (Scleratinia spp.) corals were also present in inshore submer-
gent areas. Approximately 15-20 ft. from the existing shoreline,
the bottom begins to drop off to a more uniform -3.0 ft. (MSL)
depth. Substrates in this area are a finer, calcareous sand/shell
hash fragment sediment. Medium Thalassia spp. seagrass meadows are
scattered throughout the Tom's Harbor Area. At the time of
inspection, water quality appeared excellent (clarity and circu-
lation evident).
Primary, direct, project impacts will include the removal and loss
of all of the remaining fringe vegetation and potential siltation
impacts from seawall installation activities. Due to the present
lack of significant shoreline vegetation, this former impact is
not expected to be excessive in this instance. Similarly, careful
placement and construction of the proposed seawall structure (with
turbidity curtains properly deployed) will serve to greatly reduce
potential siltation impacts. Beneficial project impacts will in-
clude increased shoreline stability and littoral microhabitat
surface area from the revised inclusion of boulder riprap placement
at the proposed seawall toe.
BE IT RESOLVED BY THE BOARD OF COUNTY COMMISSIONERS OF MONROE
COUNTY, FLORIDA, THAT the above Biological Assessment has been
read into the record and duly considered pursuant to Florida
Statute 253.124 by the Board of County Commissioners of Monroe
County, Florida, this
3rd
day of May
, 19 82
at a regularly scheduled meeting.
By
OF
~
Seal
M 7010IfM
n _~~H.
-\-'f.-:.;,:..) f\\.t-"~S).poll.,Clerk Dr ~~
A
At test: Oi
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BOARD OF COUNTY COMMIS~,v"L.I\S
Wilhelmina Harvey, District 1
Curt Blair, District 2
Mayor Protem Jerry Hernandez, Jr" District 3
MAYOR George E. Dolezal, District 4
Ken Sorensen, District 5
oKYy~ri ~,~~,~9E
130512944641
Lucien C. Proby
Monroe County Attorney
310 Fleming Street
Key West, Florida 33040
OFFICE OF:
Director
Building, Planning an
Zoning
p,o, BOX Room 205 Wing
Public Service Buildi
5825 Jr. College Rd.
Key West, Florida
33043-4399
I, the undersigned, do hereby attest that all date and
information is complete in the package of the applicant as follows:
Certificate of Complete Enclosures
1. County Biologist Report
2. Resolution (Donald W. Porter)
3. Permit
4. Application for Permit (Seawall)
5.. Si te Plan
6. Location Map
7. DER Assessment
Date ~ ,- c}{} --j ~
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TOP,S Y FORM
3397 LITHO IN U 5, A,
DEPARTMENTAL CORRESPONDENCE
DATE Apri I 19, 1982
SUBJECT
Porter, D.; Seawall
To
Kermit H. Lewin, Co. Admin. 1hp'T County Administrator's Office
Bob Dennis, Environ. BiOIOgiS,Q~EP'T Planning and Zoning
FROM
LEGAL
,is
Township 65S, Range 34 E, Section 20,
Lot 18, Block 1, Center Island, Duck
Key. Zoned RU-1M.
INTRODCUTION:
This application is to be reviewed by the Board of County Commissioners
in compliance with Chapter 19-111 (a) (5) of the Monroe County Code.
DISCUSSION:
An 80 ft. long x 8 ft. wide concrete cantilevered seawall is pro-
posed. The seawall will be constructed along the mean low water
line of Tom's Harbor waterway in order to align with a similarly
designed seawall of an adjacent property owner. There will be a
5 ft. overhang and the seawall will require 30+ cubic yards of
backfill landward of MHW and 35+ cubic yards waterward of Mwn
(including 25 cubic yards of rip=rap placed at the base of the
seawall) .
The attached Department of Environmental Regulation report discusses
this project in greater detail and should be read for additional
information.
,
~
EVALUATION:
No long-term, adverse environmental affects are expected as a re-
sult of this project.
RECOHMENDATION:
Approval.
/rnmp
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c:;"_ ~" PLA1ia~G , BVILDI?-;C & zm;n;c DEP ART:IENT PERl-fIT
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MON~OE t" '" ~"
E3 ' k1" " PEENIT YOR EXCAVATION, THE DEPOSIT OF NO.
COUNTY :.~t: ');
'~ \.~! FILL, OR STRlC'IURAL ACTIVITIES IN THE
_ .-.J;
~ ~ ....--/;,
- _!~-...... WATERS OR HETLANDS OF NOi'IROE COUNTY
1) Property mroers naT7le & mailing address 2) Date FOR DEPARTHENT USE mlLY
Donald W. Porter 11-14-81
5840 N.E. 14th Road Resolution No.
Fort Lauderdale, Florida 3) Phone number
33334 Date:
4) Contractor or agent's name, mailing address & phone number
Timm L. Reed, M.S.
c/o Reed Realty, Inc. Suite 3
5101 Overseas Highway, Marathon, Florida 33050 305/743-7520
5) Legal description of property:
Section 20 Key Duck Subdi':ision
Tmmship 65S Lot 18 Block 1
Range 34E Street, road or mile marker Bimini Drive, adj acen t to
.
17 Bimini Drive, Duck Key
Volume of material: dredzed/excavated filled/c.eposi ted
0 c.y. 0 c.y. 10 c.y. 30 c.y.
waten-/ard land",ard waterward landward
of H.B.H. of H.H.\\l'. of H.H.H. of H.H.H.
. ..
ZONING:
PURPOSE:
RU-1M
Cost of Pemit
Estimated coSt of Construction
Approved by
Chairm::m
BOARD OF COUXIY CO~~ISSIO~ERS
OF ~O~ROE COCXTY, FLORIDA
Biologist Comrnents - Restrictions or S[1t2ci.:ll Cor:Jitio:1S i:: .:my:
Approval
CODV in File D3te
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n:r';, :',vrUH:lr. ,(, 7,():n~:(: DErAnT~lENT p T APPLlr.ATIO~
""j'. J~Xr^':^,rTn'l. TPE f'lf.POSIT OF ~. OR ST!u.:CTU~AL
ACTIVITIES 1:1 THE h';\TE~S OR HETLAND OF }!O~a~OE COt.:::TY
Property owner~ naMe & mailinr a~drc~s
. Donald W~er
5840 NE 14th.Road
Ft. Lauderdale, FL
.!. Date
Puone numler
11/14/81
via agent
) Contrnctor or a~ent'~ name. Mnilin~ n2Jrc~s. rhone & certification nu~ber.
Timm L. Reed, M.S.
c/o Reed Realty, Inc. Suite 3
5101 Overseas Highwav Marathon. FL 33050
) Le~al de~cri~tion of ~roperty:
305/743-7520
Section, 20 Key, Duck Key Subdivision,
TO~lnsh ip, 65S 1.0 t , 18 Block, 1
Ran~e, 34E Street, rond or nile T11arker, Bimini Drive,
(if acrear,e) Bimini Duck Key
adjacent to 17 Drive,
Zonin?" RU-1M
) Describe the proposed activity, methods of constnction & amount of material
(in cubic yarns), to he excavnted or dischnr~ed. I'escribe purpose (. intended
use of proj'ect. Construction of concrete dock and seawall (at MLW) as detailed
in the attached drawing. Intended use private. Bulkhead backfilled with clean
fill. Cantilevered concrete deck surface.
dredr,ed/excavated
filled/deposited
'olume of material:
-0- c. y, -0- c. y.
~of:.1t:Ftr~f<1.~rl 'L\[I~\Mr(~
o t , . I . f,! . (l f ,(. II . I, .
addres~ & zip code of adjoinin~ property owners
way. Daniel Simanaitis Richard Norris
1767 Fender Rd. 17 Bimini Drive.
Naperville, II. 60540 Duck Key, FL 33050
10 c.y. 30 c.v.
~'t:R~H~~~ ~~n~.~~~~
whose prop~rty affronts
7) Name,
water
a)
List other
this site
permits issued and/or applied for, .include "applicant ' s name, for
Donald W. Porter, applied for permit for same with Army Corps of Engineers
and Florida Dept. of Environmental Regulation
b) If application has been suhMitted for this project (or one similar) in the
past, explain reason for new application and give applicant's name if
different from current applicant.
.-
J) List all Federal and State <1.~encies that have received applications for this
fl ro j ec t . Army Corps of Engineers and Florida Dept. of Environmental Regulation
Thi~ completed npplication form will be ~ccompAnied by the following, or it will
NOT Be processed.
11) Two (2) sets of drnwings. on 8\ x 11 pnper:, shm..ing loclltion, plot plAn, top view
and cro~~ ~ection of proposal, drawn to ~c~le.
b) Applic~tion proces!'!ing fee as follows:,
$25.0,0 for dredge,' fill, docks OR :my structure!'! l'lffronting natur~l water bodies.
$10.00 for vertic.,l !'Ieawalls on m:c1n-m,qde bodies of w;"ter.
$25.00 for ~ny combination of the rtbove ~ctivities per site.
^pplication is hereby m;"de for a permit to ~uthorize the activities described herein.
! certify that I am familiar with the information co~tained in this Rpplic~tion, and
to the best of my knowledge & belief such information is true, complete & pccurate.
~ further certify that I posses!'! the authority to undertAke the prooosed activities.
All orovisions of laws and ,ordinarices governing this type of work will be complied with
~nether specified herein or not. The granting of a permit does not presume to give
~uthority'to violate or c~ncel the provisions of any county, stnte or f!deral law
";"n.....u 1a ti ng con"! truc tion or pe rform,qnce of cons truction ~f this fpe' of .:tcility..
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Figure 1. Location of Proposed Dock
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Project Site
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N.O.S. Chart 11449
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.........,
scale 1:40000
Purpose:
dock and
cu. yds.
Construction of concrete
seawall. Placement of 10
fill waterward of MHW
In:
Tom's Harbour
At:
Duck Key
Datum: USCGS MLW
County of Monroe, State of
Florida
Adjacent Property ~vners:
1. Daniel Simanaitis
2. Richard Norris
Application by Reed Realty, Inc.
Sheet 5 of 7
J)3--1
Figure 2. Top: Cross Section Proposed Dock and Seawall
Bottom: Longitudinal Profile Proposed Dock and Seawall
Vo~o.'d W. FbY'~ef
813-1708
4~ - 4-9758-5&
Retaining Wall for fill.
storm water retention. steel
reinforced
Poured concrete seawall
@MLW to bedrock. steel
reinforced
MHW
MLW
scale 1:48 or
1":4'
Cantilever beam
S~a""all
place
Deck
80'
scale 1:2!iO or 1":20'
Cantilever
beams 10' O.c.
Field Inspectors Note: Proposed structllre to be same design
and placement as existing dock located 011 Lot 17 adjacent
property to the 'vest, permitted 5-14-80 file no, 44-26869-5E.
Dec. 8/
SheC't aof j
. .
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(
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Figure 3. Plan View of Proposed Dock
.
o
V)
......
---
--
Existing
Adjacent Dock
80'
------
Single Family
Residence Under
Construction
Lot 18, Block 1
Center Island
Bimini Drive
scale 1: 240 or
1":20'
_.....,:---..~':._-~._.'\....- ".,.. .__.#._.....,~'..,...,..,....I"!, ......... .~.~
J3~
Concrete Deck
OD
10 CO MHW-
Existing
Rip- Rap
.-:-
--
Sheet 7 of 7.
\L ,'( i .
'( .r
:~ ' ccrnrr~f 2.
e~tJ\S'iJ.. ht's.w~: DO'1. 'Yorz.-kf2.:--Arf
Amended Prof iles
Top: Cross Section Proposed Duck and Seawall
Bottom: Longitudinal Profile Proposed Dock and Seawall
Rip-rap added at
toe of 5ea'\1
Retaining Wall for fill.
storm water retention, steel
reinforced
Poured concrete sea~all
@MLW to bedrock, steel
__- reinforced
-
MHH
-,- MLW
scale 1:48 or
1":4'
Cantilever beam
Seawa 1~:ed
;,~ W-
Rip-rap added at
L tOl~ of se<.i\lall
in place D 1 .
eCt(
~ 80'
_L1- _~:~~p~;~:;;~_;;:;;t;C--:=-L~
scale 1:240 or 1":20'
Cantilever
beams 10' o. c.
Field Inspectors Note: Proposed structure to be same design
and placement as existing dock located on Lot 17 adjacent
property to the west, permitted 5-14-80 file no. 4Ll-26369-5E.
Slwet b of 7
I
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\
~;"7
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,~ ;'t
Amended ProfiLes
Figure 2. Top: Cross Section Propos~d Dock and Seawall
Bottom: L,mgituclinal Profile Proposed Dock and Seawall
; "!oj' ~;:,..";,.,;
Rip-rap added at
toe of seaw\l1
Retaining Wall for fill,
storm ,,'ater rE, tent ion, steel
reinforced
Poured concrete semlall
@MLW to bedrock, steel
.-_- reinforced
MEW
---------1'.!U~
sCille 1:48 or -\ I
1":4' "'---!
Cantilever beam
, Rip-rap added at
/ toe of seawall
Seawall ~d in place Deck . ~
- ~_ ,_~~~-:;r~~.,A~~~~
scale 1:240 or 1":20'
Cantilever
beams 10' o.c.
Field Inspectors Note: Propo2ed structure to be same design
and placement as existing dock located on Lot 17 adjacent
property to the west, permitted 5-l4-80 file no. 44-26869-SE.
Shee t 6 uf I
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MONROE CTY. 8LDG, DEPT.
BY 4(1 e ~,
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DEPARTMENT OF ENVIRONMENTAL REGULATION
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FEB 19 1982 "
BOB GRAHAM
GOVERNOR
JACOB D. VARN
SECRETARY
<~ '
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3201 GOl.F COURse BOUl.EVARD
PUNTA GORDA, Fl.ORIDA 33950
STATE OF FLORIDA
SOUTH FLORIDA BRANCH OFFICE
December 31, 1981
Donald Porter
c/o Timm Reed
5101 Overseas Hwy, Suite 3
Marathon, Fla. 33050
Re: Monroe County, File No. 44-49758-5E,
Seawall, Dock
Dear Mr. Porter:
As we ad~7ised you on 11-~0-81 , your a!?~lication is
i~complete without local apprcval, pursuant to Secticn 253.124,
Florida Statutes, for filling wate~Nard of ~~e existing mean/
ordinary high water line.
Please submit the enclosed copy of our biological co~ents
toge~~er with your permit application to the Boa=d of County
C .. /e' t C . , ..., ..1..' d . ...- '
c~~~ss~oners ~ y o~'c~_ or ~ne~= au~.~or~ze pe~~_w~ng
authority. Section 253.124, Florida Statutes, states that the
county commission/city co~'cil ". . .shall have in hand the
(biological) report and findings t.~ereof. II It fu:ther states,
"The report shall be read into the record and duly considered
at the same meeting at which ~~e board of county commissioners
or other authorized bodv takes =inal action on the aDolication
. - -
for permit. II
You will need to obtain a COpy of the minutes of the meeting
or an ap~ro~riate indication-of the local ap~roval. This
letter, resolution or copy of the minutes shoulc be sent to
this office. Your application will remain inccmDlete \~i~hout
valid local approval:- If you have any questions. concerning
~~s procedure, please contact us.
.
Si~cerely,
R;1J 'W~
RWC/ck
Enclosure
R. W. Cantrell
Dredge & Fill Supervisor
~ER ?o~ 17-1.122(50)
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PORTER, DONALD W.
1/44-49758-5E
Monroe County - Duck Key
Page Two
A. The applicant proposes to construct a seawall bulkhead along his
Duck Key property shoreline. The proposed bulkhead will consist
of a poured-in-place, steel-reinforced, concrete seawall with an
8 ft. wide, concrete, cantilevered cap and upland retaining wall.
The 5 ft. overwater ccntilever design will be supported by a
series of nine (9), horizontal, concrete beams spaced at 10 ft.
intervals along said seawall structure. The seawall will extend
along the applicant's entire 80 linear foot property shoreline at
the approximate MLW mark. It will connect to the west with an
existing seawall bulkhead of the same design and placement (see
Norris, D.E.R. Permit No. 44-26869-5E; May 14, 1980 for additional
details). Said seawall construction activities will entail the
deposition of 40 cubic yards of backfill stabilization materials
(30+ c.y. landward of MHW; 10+ c.y. waterward of MHW). The stated
purpose of the project is to provide the applicant with a fishing
area and property shoreline stormwater and erosion control.
Personal communications with the applicant's agent (Mr. Timm Reed;
December 10, 1981) have resulted in revising said project to
include boulder riprap placements at the toe of the proposed sea-
wall. This will entail the placement of 25+ cubic yards of riprap
materials waterward of the existing MHW line. This revision (see
attached letter and revised "sheet 6 of 7") was included at the
inspector's request.
B. The applicant's property is located along the Center Island shore-
line of northeastern Duck Key, Monroe County. At present, Duck
Key is approximately 60 percent developed with existing single
family residences (S.F.R. 's) and various supportive facilities'
(roadways, restaurants, marina, motel, stores and various recrea-
tional facilities). Most of the existing Duck Key residences are
waterfront (both canal and natural shoreline areas) and equipped
with some type of shoreline bulkheading/boat docking facilities.
The applicant's property consists of an average-size (0.25+ acres)
residential lot which is bordered to the east by several sImilar
undeveloped lots, to the west by several developed S.F.R. properties,
to the north by Tom's Harbor waters and to the south by Bimini
Drive roadway. Easterly adjacent undeveloped properties have all
been previously cleared and filled and are vegetated solely with a
variable shoreline fringe (Casurina spp. pine, bay cedar and all
mangrove spp. interspersed with patches of various transitional
flora) and upland pioneer grasses and shrubs. The majority of
undeveloped Duck Key shoreline properties are equipped with an old,
variable, boulder riprap revetment. Westerly adjacent properties
.,2, ...to
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~ORTER, DONALD W.
1/44-49758-5E
Monroe County - Duck Key
Page Three
are developed with existing, two-story, residences and concrete
seawalls similar to that proposed here. Developed upland property
areas are generally cleared and variously filled (limerock and pea
gravel) and vegetated exclusively with landscaped palms and miscel-
laneous tropical exotics. Tom's Harbor waters in this area are
Class III (Section 17-3.041; F.A.C.), predominantly shallow (less
than 10 ft. deep; MSL) , productive (seagrasses and hard corals),
of excellent quality and capable of providing deepwater naviga-
tional access.
The applicant's upland property areas are largely disturbed by
home construction activities which are currently in progress.
Miscellaneous fill piles, construction material and debris are
scattered throughout the property area. As a result, the only
remaining upland vegetation consists of a single Australian pine
tree and miscellaneous pioneer grasses and shrubs. The predominant
upland substrate is mixture of silty sediments and limerock fill
materials.
C. The project site consists of the applicant's property shoreline and
adjacent submerged lands. The applicant's property shoreline con-
sists of 18 In. ft. of natural, Duck Key/Tom's Harbor shoreline
area. It is also somewhat disturbed by the above-mentioned
construction activities (various rubble and debris depositions).
The majority of the existing fringe vegetation has been cleared
(presumably in preparation for seawall construction and lot grading
activities). Remaining shoreline vegetation is therefore limited
to isolated, small buttonwood (Conocarpus erectus) and white
(Laguncularia racemosa) mangroves and bay cedar (Suriana maritima)
bushes and patches of transitional sea purslane (Sesuvium spp.),
seashore saltgrass (Disticlus spp.) and railroad vine (Ipomoea spp.).
Boulder remains of an old, somewhat dilapidated, riprap revetment
are scattered between the approximate MHW and MLW marks. Heavy
detrital accumulations were observed along this entire shoreline
area (to 15+ ft. above the mean water mark).
Inshore submergent areas consist of a firm limerock rubble substrate
with various displaced boulder riprap materials. Varying cerinth
and nerite populations were observed throughout property littoral
areas. Submergent vegetation observed included lush algal growths
(Halimeda, Penicillus, Lorencia, Dictyota spp. and unidentified
reds and browns) and patches of Thalassia and Halodule spp. seagrass
Hard (Scleratinia spp.) corals were also present in inshore submer-
gent areas. Approximately 15-20 ft. from the existing shoreline,
the bottom begins to drop off to a more uniform -3.0 ft. (MSL)
depth. Substrates in this area are a finer, calcareous sand/shell
hash fragment sediment. Medium Thalassia spp. seagrass meadows are
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PORTER, DONALD W.
#44-49758-5E
Monroe County - Duck Key
Page Four
scattered throughout the Tom's Harbor Area. At the time of
inspection, water quality appeared excellent (clarity and circu-
lation evident).
D. Primary, direct, project impacts will include the removal and loss
of all of the remaining fringe vegetation and potential siltation
impacts from seawall installation activities. Due to the present
lack of significant shoreline vegetation, this former impact is
not expected to be excessive in this instance. Similarly, careful
placement and construction of the proposed seawall structure (with
turbidity curtains properly deployed) will serve to greatly reduce
potential siltation impacts. Beneficial project impacts will in-
clude increased shoreline stability and littoral microhabitat
surface area from the revised inclusion of boulder riprap placement
at the proposed seawall toe.
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