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Page Title:
Table C3. Alternative 2: Hydraulic Dredging, Sand Separation, CDF Disposal of Fines, Engineering Costs |
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 ERDC TN-DOER-C27
July 2002
Table C3
Alternative 2: Hydraulic Dredging, Sand Separation, CDF Disposal of Fines,
Engineering Costs
Engineering Costs, Alternative 2
Total
tons/
Cost Item
$/ton
$/cy
Total cy
cy/yr
Total $
$/yr
Tons
yr
Hyd Dredging Cost1
$4
0
225,000
112,500
900,000
$450,000
Mech Dredging Cost1
$7
0
0
$0
Mobilization/demobilization
0
0
1,000,000
$500,000
Separation1
$15
0
225,000
112,500
3,375,000
$1,687,500
Separation/Dewatering1
$60
0
0
$0
Transportation2
$110
0
0
$0
Disposal2
$50
0
0
$0
Revenues from sale
-1
0
33,613
16,807
-33,613
-16,806.5
Total:
$5,241,387
$2,620,694
CDF Construction3
$4
538,753
$2,155,012
Capping
$2
153,244
$306,488
1
Based on in situ volumes or weights.
2
Based on processed volumes or weights.
3
Based on sediment storage volume. Estimated unit costs are based on literature values for similar size CDFs, with upward
adjustments made where freeboard and ponding are required.
Table C4
Alternative 2: Hydraulic Dredging, Sand Separation, CDF Disposal of Fines,
Financial Costs (Interest Rate = 0.06375)
2001
2002
2003
Cubic Yards
0
112,500
112,500
$/yr
$2,155,012
$2,620,694
$2,927,182
IDC (interest during construction)
$438,979
$344,789
$186,608
Cost/Year
$2,593,991
$2,965,483
$3,113,789
Total Financial Investment:
$8,673,263
CDF Construction included here if completely precedes dredging.
CDF and first-year dredging included here if they will both occur in the first year.
Includes final-year capping costs.
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