Ordinance 85-02ORDINANCE NO. 85- 2
AN ORDINANCE RELATING TO THE CONSTRUCTION, RECON-
STRUCTION, REPAIR, ALTERATION, PROJECTION AND
PROLONGATION OF SEAWALLS AND REVETMENTS IN THE
UN~C~RPORATED AREAS OF COLLIER COUNTY; PROVIDING
DEFINITIONS; PROVIDING THAT A FAILED SEAWALL OR
RE~WTMENT IS UNLAWFUL AND A PUBLIC NUISANCE;
PROVIDING FOR ENFORCEMENT JURISDICTION BY AMEND-
IN~ ~ECTION T}IREE, SUBSECTION 2 OF ORDINANCE NO.
83~4~TO PROVIDE TItAT Tile CODE ENFORCEMENT BOABD
OF~'COLLIER COUNTY SHALL HAVE JURISDICTION TO HEAR
A~) DECIDE ALLEGED VIOLATIONS OF THIS O~DINANCZ;
PROVIDING FOR OTHER ENFORCEMENT REMEDIES AND PENAL-
TIES~ PROVIDING TECHNICAL SPECIFICATIONS FOR SEA-
WALLS AND REVETMENTS; PROVIDING FOR CONFLICT AND
SEVERABILITY; PROVIDING AN EFFECTIVE DATE.
WtIEREAS, there arq many areas in the County which are
adjacent to natural or man-made bodies of water~ and
WHEREAS, many of these areas adjacent to bodies of water are
bordered by leawalls and revetments; and
WHEREAS, properly designed and constructed seawalls and
revetments metre to prot.ct waterfront upland property and
improvements located thereon against wave attack and serve to
stabilize the position of the shoreline; and
WHER£AS. .eawalls and rev.tmo, nts have a tendency to fai~ and
fall into bodies of water becauso of the passage of tiAe, strong
winds, heavy rains, erosion, corrosion, and high and ~ow t~des
among other reasons; and '"
WHEREAS, seawalls and revetments which have failed or
collapsed are a hazard to n.vigation in navigable bodie~ of water
and a ~azard to drainage and flood control in non-navigable
bodies of water; and
W}IEREAS, a failed seawall or revetment with accompanying
loss of fill, unless promptly replaced or repaired, may cause
continuing loss of soil on adjoining properties which can
seriously and adversely affect the stability of seawalls and
revetments on those adjoining properties as well as the value of
adjoining properties; and
WHEREAS, a failed seawall or revetment deprives adjoining
property owners of the additional strength that derives from the
common benefit of a continguous ~eawall or revetment; and
~{EREAS, individual property owners are presently respon-
sible for maintenance, repair, and replacement of seawalls and
rlvltmantl along their property; and
W~EREAS, there prelently exists a threat to public health,
safety, and welfare because of the failure of some individual
property owners to maintain, repai~, or replace their failed
seaw&lls or revetments;
NOW T}{EREFORE. BE IT ORDAINED BY THE BOARD OF COUNTY
COMMISSIONERS OF COLLIER COUNTY, FLORIDA:
Section Onet Definitions~ As used in this Ordinance, the
following words shall have the following meanings:
"County": means the unincorporated area of Collier
County, Florida.
"Seawall": means any solid upright structure which
s~rv,~ to g-parnte real property and/or any
improvements thereon from any natural or man-made body
of water.
"Failed seawall or revetment': means a seawall or
revetment that has failed ztructurally or that has
moved from its original position or that does not
serve to stabilize the position of the shoreline.
"Revetment': means a sloping structure which serves to
separate real property and/or any improvements ther,on
from any natural or man-made body of water.
Section Two: Failed Seawall Or Revetment Declared To Be
Unlawful And A Public Nuisance.
It is hereby declared unlawful and a public nuisance for any
property owner in the County to permit, cr to fail to repair or
reconstruct, any failed seawall or revetment upon his property.
Section Three: Enforcement Jurisdiction.
In any area of the County where a Code Enforcement Board
exists, such Code Enforcement Board shall have Jurisdiction to
enforce the provisions of this Ordinance, however the Jurisdic-
tion of the Code Enforcement Board shall not be exclusive. The
Code Enforcement Board ~hall have such enforcement powers to be
exarcilad in much manner al may be provided by county ordinance
or Irate statute, includiDg the authority to levy a fine Dot to
exceed two hundred fifty dollars ($250.00) for each day a viola-
tion continual pelt the date let by the Coda Enforcement Board"s
order for compliance. In connection therewith, Section Three,
Sublaction 2 of Ordinance 83-43 which created the Code Enforce-
ment Board of Collier County, il h~reby amended by adding the
following language:
(J) Seawalls and Revetments - Collier County Ordinance
No. 85- ] and amendments thereto.
Section Four: Other Enforcement Remedies And Penalties.
Violation of the provisions of this Ordinance, or failure to
comply with any of the provisions of this Ordinance shall consti-
tute a mildemeanor. Any person who violates this Ordinance or
fail= to comply with any of thc provi=ion= cf thin Ordinance
shall upon conviction thereof be fined or imprisoned, or both, as
provided by law, and in addition shall pay all costs and expenses
involved in the case. Each day such violation continues shall be
considered a separate offense.
In addition, the Board of County Commissioners may take
any other lawful action in any court of competent jurisdicticn as
is necessary to prevent or remedy any failure or refusal to
comply with any of the provisions of this Ordinance. Such othe!
lawful action shall include, but shall not be limited to, an
equitable action for injunctive relief or action at law for
damages or foreclosures of liens. Nothing contained in this
Ordinance shall be construed to limit or otherwise adversely
affect an adjoining property owner's right to seek redress for
damages resulting from a failed seawall or revetment.
Section Five~ Technical Specifications For Seawalla
And Revetmonts.
There is attached hereto and incorporated by refcre~lcc
herein a document entitled "Collier County Seawall and Revetment
Regulations - Technical Specifications," consisting of pages one
through nine, inclusive of design figures. All seawalls and
revetments constructQd, reconstructed, repaired, altered, pro-
Jected or prolonged in the County after the effective date of
this Ordinance must meet or exceed these technical specifica-
tions as follows~
A. Minor repairs to the seawall or revetment which do not
necessitate physical alteration to the existing structural
support system are exempt from the technical specifications.
B. Major repairs to the seawall or revetment which necessi-
tate physical replacement of any portion of the structural
support system, except sheet piling, shall comply with the
appropriate material specification of the technical cpecifi-
cations for the proposed repair only.
C. Reconstruction of any seawall or revetment requiring the
complete reinstallation of the sheet pile portion of the
structural support system, or any new seawall or revetment
section installed adjacent to or independently from any
existing seawall or revetment shall require complete con-
formance with all sections of the technical specifications
for that portion of seawall or revetment.
Failure to comply with these technical specifications
shall constitute a violation of this Ordinance.
Section Six: Conflict and Severability.
In the event this Ordinance conflicts with any other
ordinance of Collier County or other applicable law, t}:u more
restrictive shall apply. If any phrase or pcrtion of this
Ordinance is held invalid or Unconstitutional by any court of
competent Jurisdiction, such portion shall be deemed a separate,
distinct and independent provision and such holding shall not
affect the validity of the remaining portion.
Section Seven, Effective Date
This Ordinance shall become effective upon receipt of notice
from the Secretary of State that this Ordinance has been filed
with the Secretary of State.
BOARD OF COUNTY COMMISSIONERS
COLLIER COUNTY, FLORIDA
SS, Chairman
STATE OF FLORIDA )
COUNTY OF COLLIER )
I, %~ILLI,%~ J. R~%CA)~, Clerk of Courts in and for the ~entieth Judicial
Circuit, Collier County, Florida, do hereby certify that the foregoing in a
:rue oriKinal of:
ORDINANCE NO. 85-2
~htch waa adopted by the Board of County Commisntonern during Regular Session
tile 8th day of January, 1985.
WITNESS my hand and the official neat of the Board of County Co~miaalonern
of Collier County, Florida, thta flth day of January, 1985.
~ eedleance filed wl~ the
and m*..~c~~t of thor
WILLIAR J. REAGAN
Clerk of Court- ami Clerk
F~-Officio to Board of
County CT/t, jlalonera .' ,..."
,oo, 019.,;;ZS7
COLLIER COUNI~ SEAWALL AI4D REVETHENT REGULATIONS
TECHNICAL SPECIFICATION
SECTION Il DESCRIPTION
The york described in this Specification consists of the design ,md construc-
tion of v&tsrfront upland propart7 and building protection structures such aa
seavalls and revetments which serve to protect against wave attack ~nd to sca-
bilges tbs position of the shoreline.
The Deailn and Construction standards herein described shall provide minimum
requirements for all ssavalla and revetments constructed, reconstructed, repaired,
altered, pro]acted or prolonged.
SECTION
DESIGN CONflDERATIONS
General
1. All plans and specifications for eeawalle and revetments
shall be prepared by & Professional Engineer registered in the
Stats of Florida.
2, Th~ d~algn ~f th~ structures shall adequately address all
possible soil, live, dead and hydrostatic loadings existing
durinR the life of the structure.
Criteria
1. Soil and site parameters essential to the structural design
ars summarized on Figure I.
2. The active failure soil wades on the upland side o! the
structure shall assume saturated soil to the top cap of the
seawall/revatmanC.
3. ~e low wager depth on the water'ward aide of the structure
shall be assumed co be a "Iow, low" tide.
SECTION 3:
A.
GENERAL REqUIRF~ENTS
l~catton
Saa~alle ahall be placed so chat the wate r~ard face of the wall ia
coincidental with the platted property ot bulkhead line, if one
exists, or at the intersection of the mean high water line with
the existing shoreline.
Revetments shall be placed so the exposed rock face intersects the
platted property or bulkhead line at the mean high water line.
Elevation
The cap elevation for all seawalle and revetments fronting on
protected tidal waters shall be equal to, or greater than, eleva-
tion &.5 feet N.G.V.D. (National Geodetic Vertical Datum) and
equal to or Rreater than, 5.5 fast N,G.V.O. on open bays and
channels. The elevation for all seawalla and revetments fronting
on freshwater canals and lakes shall be equal to, or greater than,
the local high water elevation as determined for a 25 year return
frequency design storm event.
January R, 1985
The only flllin~ authorized herein shall be for backfill behind
Cbs ssswalle or revetments and shall not ~xtend say further water-
ward chart existinl eeawalls or revetments. The backfill shall be
from upland sources and consist of suitable granular material free
from toxic pollutants in ocher than trace qusnCiting. At no tim
shall this Specification ba construed to allow the filling of
any County, Stats or Federal wetland.
D. Code Enforcement
1. The County Manager, or his designated representative, shall
review the plans and specifications to deter~ine if all
appropriate Engineering Certifications ire provided. Upon
detnraination chat all certifications ars provided, the County
MsnaRnr, or hie designated reprnsentativn, shall issue a
Per,nit Co psrfo~ such work.
2. At the conclusion of all p,~itt~d work relating to an indi-
vidual s~awall or r~v~tm~nt improvement, a certification by a
Prof~msional Ensine~r r~iist~r~d In the State of Florida
shall h~ provided to th~ County ~lnaimr, or him d~sl~nat~d
r~presenta~lve, varifying compliance with the design and
construction requirements of thin Specification.
E. Special Conditions
The County ManaAer. or his desiRnated representative. ~y waive/
abate only ~hose requirements detailed herein that are in dtroc~
conflict with existing conditions at or adjacent to the property
location for th~ proposed s~awsll or r~vstm~nt improvaments.
Substitutions ~ay b~ authorized by the County ~naR~r, or his
d~siRna~ed representative, for seawalls or revetments consr~cr~d
of ~t~rial and/or by m~thods other than ss d~ailed in this
Ordinanc~ only If the d~siEn considsr~tions of Section 2 h~r~ln ar~
compll~d ~lth. ~ls authorization does not all~ substitution of
any requirement detailed In S~ction a herein.
SECTION ~:
A.
RESTRICTIVE SPECIFICATIONS
General
I. The Standard Specifications of chh Florida Department of
Transportation for Road and Bridge Construction, L&test
Edition, shall govern all conntruction~ including aatsrials
and work~anship~ where applicable.
2. The references to tie-back rode and anchors in the following
subsections shall not be construed aa a rnquirnmant by Collier
County for that particular means of sheet pilint support sys-
tem but ara included for Specification information purposes
only. 14hen utilized, the tie-back rods shall be strniiht
between wall cap or velar and anchor plats.
3. Sheet piling shall bs installed plumb in both the horizontal
and vertical directions.
J~nuarv R, lg~S 2
~. Sheet pilin8 shall penetrate into fica ground o minimum
~0~ of the total length of the sheet pile but never less th~n
& {eat, This penetration requirement nay be abated in the
avant the toe of the sheet pile can be embedded a miniumum of
12 inches in solid bedrock.
5. The toe-berm of all sheet pill leaValll shall ba protected by
a atone rip-rap revetment placed on a filter fabric erosion
control blanket in accordance with Section &.D aa
a. At locations vhsre soils viii not adequately resist
toe-out failure by addl~ional penetration depth alone;
b. At locations where lateral tidal flows create excessive
scour and erosion of the toe-berm;
c. At any ocher location where the design Engineer deems it
necessary for the preservation of the integrity of the
seawall.
Concrete Sheet Pile Seawslls
I. All aeavalls under this Section may be of concrete, utilizing
the tongue end zro~v,, ar ~cher spproved me~hod of construc-
tion. ~lth poured-in-place concrete :ap.
2. Th~ concrete shall have a minimum test strength of 3,000 psi
after 28 days.
Each sheet pilins slab shall have s minimum thickness of six
inches and provide a minimum reinforcing steel cover of
and one-half (2~) inches of concrete.
~e concrete cap shell not be less than 10 Inches in thick-
ness. nor less than 16 inches in width, and con,sin one-half
(~) inch e×p~nsion Joints of pre-molded sealer at all property
lines b~ in no cese more ~hmn 100 foot intervals.
~. All tie-back rods shell he of a alee. material and composi-
tion to ensure a three-~o-oae (3:1) safety factor under the
desisn criteria outlined in Section 2.A.2. Tie rods shall be
integral with ~he slab vertical reinforcing steel ~nd be
environmentally protecte~ against corrosion by "hot-dip"
galvanizing in accordance wl~h AST~ A-153. epoxy coating in
accordance ~l~h ASTM A-775. or any other equivalent protection
materi,1.
6. Tie-rod anchors shall have not less than six square feet of
vertical surface area perpendicular to the alignment of the
~ie-rod and be located within the area of full passive resis-
tance.
Aluminum Shee~ Pile Seawalls
1. All eeawalla under this Section may be of aluminum, with all
members conforming to the appropriate ASTM standards so
specified.
2. Sheet piles shall be fabricated from aluminum alloy ~052-HIAl,
conforming to ASTH ~-20~ alloy ~0~2 for chemical compoaition;
also having a minimim thickness of 0.12~ inches and a
ultimate tensile strength o! ~5~00 p.a.i.
3
Cap and Joint extrusions shall bs fabricated from aluminum
alloy 6063-T6, conformtn~ to ^iTt~ B-22t alloy 6063 for
chemical composition{ also having a minimum thickness of 0.15
inchel and a minimum ultimate tensile strength o~ 30,000
p.s.i. The cap shall be a minimum of six inches vide and
five and three-quarters (5.75) inches deep.
A~chor rods and anchor plates shall be fabricated fron
aluminum alloy 6061-T6, conforning ASTH'B-221 alloy 6061
chemical composition{ also havin{ a ~iui~m thic~ess
0,125 inches for anchor plates and a minima diameter of 0.75
inches for anchor rods, both with a sinimum ultiute tensile
strength of 38,000 p.s.l. ~chor rods shall be destined to
ensure a three-to-one (311) safety factor under the design
criteria outlined in Section 2.A.2.
5. Installation procedures shall ioll~ the {uidelines and
methods required by the aluminum seawall manu[acc,srer.
6. If the aluminum ~aterial is brought in contact with concrete,
a cos:ini of clear methacrylar- lacq. er shall be applied to
the aluminum contac~ surface to prevent corrosion.
shall be nn dissimilar metals or metal systems bonded to the
Revetments
1. ~e york under this ~ectiun la comprised of a heavy
factsR of precn~t co-crete blocks, natural stones and
boulders, bars filled with sand-cement mixture o[ grout, or
some other durable [acing ~terial placed on a stable natural
sloping shore.
2. ~e revetment shall be placed on a smooth, even, compacted
elope with a iradient not exceeding one foot vertical drop
lot every two feet of horizontal distance.
]. All revet~nta shall be placed on a woven plastic ~ilter
~abrtc in accordance with F.D.O.T. Specifications, Section
51l. ~is fabric shall be overlaid by a layer of one inch
four inch stone which shall se~e as a cushion for the
layer protection. ~e [abric shall be folded over and
anchored by larger rock at the toe o~ the revetment slope.
i. ~e stone revetment a~r layer shall be comprised
boulders of sufficient quantity and size to withstand all
:ida and wave forces, but tn no case be Lass than that
specified by F.D.O.T. Specifications Section ~]0.
5. Alternative ar~r layers oi protection ~y be sand-cement
base interconnected by Il rein[orcin8 dowels, in accordance
with F.D.O.T. Specifications Section 530,
"Terra~ix', "T:i-lock' or any other approved inter[ockinl~
precast, modular concrete a~or system.
January R, 19R$
m
StC~IO~ $: PEtFOP~4CE
T~.M Spscificatio~e detail minimum requ~r.ne~ts for s.awalls and r.vetnanta
~hich ers to ~ cons~ct.d in Colli.r County. ~ndividuaX
libility Of the land--er, based upon specific site conditions, type of shore
.tl~lli:ltion st~cturs desired, ~thod of coMt~c~ion, and all other ~actors
requir.~ntl onl~ and ars not lntend.d to bsa final d.siBn rela~ln~ to
sit~ or an~ oth.r affsctint conditions.
II
i
.~o % P~trotion
TYPICAL STONE REVETMENT
TYPICAL, CONCRETg-BLOCK REVE:TMENT
PLAN VIEW
SECTION A'A
INTERLOCKING BLOCK
Fl<}ure 4