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TABLE A-6
CITY OF FORT WALTON BEACH
OXIDATION DITCH ESTIMATED COSTS
ALTERNATIVE - 3
I
Contingency, Engineering, Total
Initial Capital Expense Item Unit Cost Permltting@25% Capital Cost ASL
RBC Equipment Removal/Disposal 20, 000 $ 5,000 $ 25, 000 30
150, 000 37, 500 187, 500 15
Flow EO Mixers/Rails/Supports
1, 600, 000 400,000 2, 000, 000 50
Oxidation Ditch Structure
250, 000 62, 500 312, 500 50
Additional Excavation to Maintain Hydraulic Profile
I Mechanical Aerators ( 2 - 150 hp)
Electrical Modifications
500, 000
250,000
125, 000
62, 500
625,000
312, 500
20
30
110,000 27, 500 137, 500 30
Recycle Wetwell
115, 000 28,750 143,750 15
Recycle Pumps
350, 000 87, 500 437, 500 30
Yard Piping
25,000 6, 250 31, 250 30
Influent & Effluent Weir Gates ( includes recycle basin)
40,000 10,000 50,000 15
Generator (supplemental capacity)
4,262, 500
Total
1)
Additional Capital Expenses in 15 Years (
150,000 37, 500 187, 500
Flow EO Mixers/Rails/Supports
115, 000 28,750 143,750
RASNVAS Pumps/Motors
40, 000 10, 000 50, 000
Generator (supplemental capacity)
I 381, 250
I
1)
Additional Capital Expenses In 20 Years (
120, 000 30,000 150,000
Rebuild Mechanical Aerators ( 2 - 150 hp)
I
Residual Value After 30 Years
Total Remaining Residual Value
Capital Cost ASL After 30 Years
iii Components with remaining service life
2, 000,000 20 800, 000
Oxidation Ditch Structure
312, 500 20 125, 000
Additional Excavation to Maintain Hydraulic Profile
III
iii Estimated Residual Value 925,000
1) Costs as of 2002, costs are inflated in the present value analysis.
I,
III
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2001/ 01.0387. 000/Report/ R-4/ 031403 Final Report/031403 A-6, 9, ll,13. tbl
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III
III
II
Table A-7
Present Value Analysis
RBC - Alternative 1
Ii
Capital Operating Total
Period Year Current FV Current Future Current Future PV Factor PV
0 2002 $ 2, 650, 000 2, 650, 000 2, 650, 000 2, 650, 000 1. 00 2, 650, 000
1 2003 0.95
2 2004 86, 000 90, 354 86, 000 90, 354 0. 91 81, 954
3 2005 86, 000 92, 613 86, 000 92,613 0. 86 80, 002
4 2006 86, 000 94, 928 86, 000 94, 928 0. 82 78, 097
5 2007 86, 000 97, 301 86, 000 97, 301 0. 78 76, 238
I 6
7
2008
2009
86, 000
86, 000
99, 734
102, 227
86, 000
86, 000
99, 734