Option 4 - Stormwater Diversion along Shepard Road in Subwatershed CR06 Item Investment Cost Estimate Ditch / Swale Improvements (Re-vegetation) Existing Outlet Standpipe Modifications
Quantity
Unit
Unit Cost
1.315 1
AC EA
$ $
1
ea.
Contingencies Construction Cost
--
Construction Management Services Design Fee
-1 1
15,000 250
$ $
19,725 250
20% $
3,995
$
23,970
5% $ 20% $
1,199 4,794
$
30,000
--
EA EA
Total Investment Cost Annual Operating Cost Annual Operation & Maintenance Annual Operation Costs Overhaul Cost at 15 years Ditch / Swale Maintenance & Sediment Removal Pipe Maintenance / Cleaning Replacement occurs at: Total replacement costs
Cost
1
EA
$
1,000
$ $
1,000 1,000
1 1 15
EA EA yr.
$ $
5,000 1,000
$ $
5,000 1,000
$
6,000
$
30,000
$ $
3,580 18,400
$
51,980
$
2,830
Project Present Value Investment Cost Economic life Present Value of 15 yr Replacement Present Value of Annual Operating Costs over Lifetime
30
yr.
Total Present Value Project Annual Cost Annual cost (annuity) Interest rate assumed for present value =
3.50%
W:\06 Projects\Crosby Lake\Management Plan 2010\Management Plan\Appendices\Appendix G Implementation Projects.doc