HomeMy WebLinkAboutCollierCanal Retrofit ProjectCollier Canal Stormwater Retrofit Project
Review of Status
16 August `07
Outline of Options for Perimeter /Cross-Sections
Option Estimated Some Some
Range of Cost Advantages Disadvantages
Going Forward
(A) Rip-Rap cladding on side
slo es. Now designed and permitted and Access to /from canal waters
... Scenario 1: From CR-512 to ready to out to bid for construction becomes problematic.
Flemin Street Bride $1,300,000 by early October with completion
... Scenario 2: From CR-512 to in more than 18 months. This alternative is a "compromise"
a rox.1/2 wa betty. brid es $2,500,000 solution and may not be happily
... Scenario 3: From CR-512 to Likely affordable to do entire canal embraced by all adjacent property
Barber /Lake Street bride $3,800,000 as originally proposed. owners.
... Scenario 4: From CR-512 to
be and Barber St. bride $4,400,000
(B) Sodded side slopes.
Provides better, more gentle
Significant reduction in water
... Scenario 1: From CR-512 to $1,500,000 access to canal waters. treatment and resulting quality.
Flemin Street Brid e
... Scenario 2: From CR-512 to $2,400,000 Likely to be more inexpensive Will take additional design and
a rox.1/2 wa betty. brid es overall than rip-rap alternative if permitting but is not likely to save
... Scenario 3: From CR-512 to $3,300,000 entire canal project is done. significantly more entire canal is
Barber /Lake Street bride not done.
... Scenario 4: From CR-512 to $3,700,000
be and Barber St. bride High level of maintenance req'd.
(C) New vertical bulkheads
with 20' wide ledge on each
side inside canal ROW. Provides vertical bulkheads Cannot be recommended because
... Scenario 1: From CR-512 to $2,100,000 combined with "ledges" suitable for of too low factor of safety for slope
Flemin Street Bride flora and fauna. stability downward from the ledges
... Scenario 2: From CR-512 to $3,300,000 into the dredged area.
a rox.i/2 wa betty. brid es Is likely to be preferred by adjacent
... Scenario 3: From CR-512 to $6,200,000 property owners to alternatives Probably not enough funding
Barber /Lake Street bride involving side slopes (either rip-rap available to do the entire canal
... Scenario 4: From CR-512 to $7,200,000 or sod). area initially proposed.
be and Barber St. brid e
(D) New vertical bulkheads
without any ledge inside canal
ROW. Provides good water quality and is Relatively expensive and will
... Scenario 1: From CR-512 to $2,900,000 likely the preferred scenario by require additional design and
Flemin Street Bride adjacent property owners. permitting.
... Scenario 2: From CR-512 to $5,500,000
a rox.i/2 wa betty. brid es Probably not enough funding
... Scenario 3: From CR-512 to $8,700,000 + available to do the entire canal
Barber /Lake Street bride area initially proposed.
... Scenario 4: From CR-512 to $10,000,000 +
be and Barber St. brid e
16 August 07
Pg4of5
DWF
Collier Canal Stormwater Retrofit Project
Review of Status
16 August `07
RECAP -RANGE OF ESTIMATED FURTHER COST FOR VARIOUS ALTERNATIVES
Scenario 1: Scenario 2: Scenario 3: Scenario 4:
From CR-512 to From CR-512 to From CR-512 to From CR-512 to
Plan Fleming Street
Bridge approx. half-way
between bridges Barber /Lake
Street bridge beyond Barber /
Lake bridge Comment
1250 LF 3000 LF 5000 LF 5900 LF
Now permitted
and ready for
(A) Rip-Rap bidding by early
cladding on $3,800,000 $4,400,000 October (with
side slopes. construction
completion within
18 months).
Additional design
(B) Sodded and permitting
side slopes. 3,300,000
$ $3,700,000 required.
(C) New vertical
bulkheads Cannot be
combined with
20' wide ledge $2,100.000 $3,300,000 $6,200,000 $7",200,000 recommended
due to low factor
on each side of safety for slope
inside canal stability.
ROW.
(D) New vertical
bulkheads
without any
ledge inside
canal ROW.
$5,500,000
$8,700,000
(+)
$10,000,000
(+) Most expensive
solution.
Scenarios 1 and 2 Vertical bulkhead alternatives (Plans
Comment under all Plans (A-D) C and D) likely not affordable for
are likely affordable. Scenarios 3 and 4.
16 August '07
Pg5of5
DWF
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