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Page Title:
Table C7. Alternative 4: Hydraulic Dredging, Sand Separation, Dewatering and Offsite Disposal of Fines, Engineering Costs |
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 ERDC TN-DOER-C27
July 2002
Table C7
Alternative 4: Hydraulic Dredging, Sand Separation, Dewatering and Offsite
Disposal of Fines, Engineering Costs
Engineering Costs, Alternative 4
Total
tons/
Total
Cost Item
$/ton
$/cy
cy/yr
Total $
$/yr
Tons
yr
cy
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
0
$0
Separation/Dewatering1
$60
0
225,000
112,500
13,500,000
$6,750,000
Transportation2
$110
137,392
68,696
0
15,113,120
$7,556,560
Disposal2
$50
137,392
68,696
0
6,869,600
$3,434,800
Revenues from sale
-1
33,613
16,807
-33,613
-16,806.5
Total:
$37,349,107
$18,674,554
CDF Construction3
$6
0
$0
Capping
$2
0
$0
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 C8
Alternative 4: Hydraulic Dredging, Sand Separation, Dewatering and Offsite
Disposal of Fines, Financial Costs (Interest Rate = 0.06375)
2001
2002
2003
Cubic Yards
0
112,500
112,500
$/yr
$0
$18,674,554
$18,674,554
IDC (interest during construction)
$0
$2,456,900
$1,190,503
Cost/Year
$0
$21,131,454
$19,865,056
Total Financial Investment:
$40,996,510
CDF Construction included here if completely precedes dredging.
CDF and first-year dredging included here if they will both occur in the first year.
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