Sewall construction and maintenance - City of Punta Gorda
Sewall construction and maintenance - City of Punta Gorda
Sewall construction and maintenance - City of Punta Gorda
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<strong>City</strong> <strong>of</strong> <strong>Punta</strong> <strong>Gorda</strong>, Florida
Construction in Waterways<br />
Criteria <strong>and</strong> Limitations<br />
* Structures must be placed within an area extending<br />
waterward at a 45° angle from property’s seawall at the<br />
side property lines, not to exceed 25’ waterward from<br />
seawall, nor encroach 25’ <strong>of</strong> established centerline <strong>of</strong><br />
waterway except: In waterways where width is less than<br />
100’ or in waterways not seawalled, structures will be<br />
placed to not exceed 10’ waterward unless 50’ passageway<br />
can be maintained.<br />
* Construction (single family homes) is permitted to<br />
dedicated public platted canals for freest<strong>and</strong>ing concrete<br />
docks protruding no more than 10’ waterward from<br />
seawall <strong>and</strong> on lots having at least 85’ <strong>of</strong> seawall length:<br />
a) a boat lift <strong>and</strong> up to 3 outpilings, or b) up to 6<br />
outpilings, or c) 2 boat lifts.
…continued<br />
Construction in Waterways<br />
Criteria <strong>and</strong> Limitations<br />
* For single-family & multi-family homes on lots with<br />
less than 85’ <strong>of</strong> seawall length: a) freest<strong>and</strong>ing concrete<br />
dock protruding no more than 10’ waterward, b) 1 boat lift<br />
or up to 3 outpilings <strong>and</strong> c) on lots with 50’ or less <strong>of</strong><br />
seawall, an approved extension may extend up to 25’<br />
waterward within the 45 degree angle.<br />
* Construction (multi-family homes) is permitted to<br />
dedicated public platted canals for freest<strong>and</strong>ing concrete<br />
docks protruding no more than 10’ waterward from seawall<br />
<strong>and</strong> on lots having at least 85’ <strong>of</strong> seawall length with a canal<br />
width <strong>of</strong> less than 120’: a) a boat lift <strong>and</strong> up to 3 outpilings,<br />
or b) up to 6 outpilings, or c) 2 boat lifts, or…
…continued<br />
Construction in Waterways<br />
Criteria <strong>and</strong> Limitations<br />
* On lots having a canal width <strong>of</strong> 120’ or greater with at<br />
least 85’ <strong>of</strong> seawall: a) freest<strong>and</strong>ing concrete finger docks<br />
a minimum <strong>of</strong> 4’ in width protruding no more than 25’<br />
waterward from seawall, b) finger docks shall be separated<br />
by a minimum <strong>of</strong> 27’ in width, c) number <strong>of</strong> boat slips not<br />
to exceed number <strong>of</strong> units, d) up to 3 bumper piles per<br />
slip(s), provided bumper piles are within 45 degree rule,<br />
<strong>and</strong> e) areas currently permitted with finger docks are<br />
allowed to install boat lifts at permitted slips provided they<br />
are no more than 25’ waterward <strong>of</strong> the seawall & within<br />
the 45 degree angle area.
Construction in Waterways<br />
Maintenance <strong>of</strong> seawalls & appurtenances<br />
* The cost <strong>and</strong> expense <strong>of</strong> <strong>maintenance</strong> that are the<br />
responsibilities <strong>of</strong> canal <strong>maintenance</strong> assessment district<br />
include:<br />
1) Remove from canals anything impeding flow <strong>of</strong><br />
water or navigation.<br />
2) Maintain berm to proper height by placing fill on<br />
water side <strong>of</strong> seawall whenever necessary.<br />
3) Repair deteriorating seawall or remove & replace<br />
entirely the seawall, berm <strong>and</strong> backfill. Protect<br />
abutting & adjoining properties.<br />
4) Supply fill material to property owners who wish<br />
to fill sinkholes.
Construction in Waterways<br />
Maintenance <strong>of</strong> seawalls & appurtenances<br />
…continued<br />
5) Inspect seawall, berm & backfill on properties<br />
on a regular basis.<br />
6) Administer & implement the program for canal<br />
<strong>maintenance</strong> <strong>and</strong> act as trustee for funds<br />
generated, to be expended only in the canal<br />
<strong>maintenance</strong> assessment district.<br />
7) Dredge for boat docks <strong>and</strong> provide other<br />
<strong>maintenance</strong> services upon payment <strong>of</strong> user fees<br />
in amounts as established by resolution <strong>of</strong> <strong>City</strong><br />
Council.<br />
8) Dredge navigable channels when needed.
Construction in Waterways<br />
Maintenance <strong>of</strong> seawalls & appurtenances<br />
* It is the responsibility <strong>of</strong> property owners <strong>and</strong> tenants within<br />
the canal <strong>maintenance</strong> district to provide proper & safe<br />
<strong>maintenance</strong> <strong>of</strong> all appurtenances <strong>of</strong> theirs as they may affect<br />
the condition <strong>of</strong> seawalls <strong>and</strong> canals, <strong>and</strong> specifically the<br />
following:<br />
1) On the water side <strong>of</strong> seawalls, <strong>maintenance</strong> <strong>of</strong> all<br />
davits or other hoisting or launching devises, docks,<br />
pilings, other devices, dock lights, water lines, power<br />
lines, boats <strong>and</strong> all other equipment.<br />
2) On the l<strong>and</strong> side <strong>of</strong> seawalls: a) <strong>maintenance</strong> <strong>of</strong> all<br />
davits or other hoisting or launching devices, patios,<br />
swimming pools, walks, sprinkler & plumbing systems,<br />
wiring, grass, trees, shrubbery & other appurtenances or<br />
structures erected or placed upon the property.
Construction in Waterways<br />
Maintenance <strong>of</strong> seawalls & appurtenances<br />
…continued<br />
On the l<strong>and</strong> side <strong>of</strong> seawalls: b) Maintenance <strong>of</strong> the<br />
backfill at least level with top <strong>of</strong> seawall caps. c) Refrain from<br />
any act that might endanger integrity <strong>of</strong> seawalls, tie-rods or<br />
deadman. Any object or structure attached to or resting on or<br />
against the seawall or cap is prohibited, including cleats or<br />
anchors. Tie-<strong>of</strong>f anchors may be placed 6’ or more l<strong>and</strong>ward<br />
<strong>of</strong> seawall.<br />
3) Maintaining the appearance <strong>of</strong> the seawall <strong>and</strong> cap<br />
similar to those on adjoining lots.<br />
4) Dredging, except in navigable channels.
Discussion Outline<br />
√ <strong>Punta</strong> <strong>Gorda</strong> Canal Maintenance History<br />
√ Overview <strong>of</strong> Canal Maintenance Ordinances<br />
* Common Causes <strong>of</strong> Seawall Failure<br />
* Common Causes <strong>of</strong> Seawall Failure<br />
- Cap, Tie Back & Davit Failure<br />
- Water & Oyster Line Failure<br />
- Toe & Berm Failure<br />
- Slab Joint Failure & Sinkholes<br />
- Grass Edging
CAP, TIE BACK & DAVIT FAILURE
WATER & OYSTER LINE FAILURE
TOE & BERM FAILURES
SLAB JOINT<br />
SEPARATION<br />
SINKHOLES
Discussion Outline<br />
√ <strong>Punta</strong> <strong>Gorda</strong> Canal Maintenance History<br />
√ Overview <strong>of</strong> Canal Maintenance Ordinances<br />
√ Common Causes <strong>of</strong> Seawall Failure<br />
* Construction Methods<br />
* Construction Methods<br />
- Cap replacement<br />
- Construction <strong>of</strong> seawall slabs<br />
- Seawall replacement<br />
-Riprap<br />
- Sinkhole Repair
Construction Methods<br />
Cap<br />
Replacement
Construction Methods<br />
Construction<br />
<strong>of</strong><br />
Seawall Slabs
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Construction Methods<br />
Seawall<br />
Replacement
Construction Methods<br />
Riprap
DREDGING<br />
RIPRAP
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