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ERDC TN-DOER-C27
July 2002
Table C19
Alternative 2: Hydraulic Dredging, Sand Separation, CDF Disposal of Fines,
Maintenance Dredging Engineering Costs
Maintenance Dredging Engineering Costs, Alternative 2
Cost Item
$/ton
$/cy
tons/yr
cy/3 yr
$/yr
Hyd Dredging Cost1
$4
0
75,000
$300,000
Mech Dredging Cost1
$7
0
0
$0
Mob/Demob
0
0
$500,000
Separation1
$15
0
75,000
$1,125,000
Separation/Dewatering1
$25
0
0
$0
Transportation2
$110
0
0
$0
Disposal2
$50
0
0
$0
Revenues from sale
-1
0
24,648
-24,648
$1,900,352
Total:
Additional Cost Items:
Annual Facility Maintenance
$20,000
Storage capacity consumed cy/3 yr
73,477
Available storage capacity at first cycle
1,040,745
Cycles to replacement of existing CDF yr
14.16
Number of maintenance cycles completed
10
(There are only 10 cycles in period of analysis)
Number of maintenance cycles remaining
0
Volume CDF required to accommodate remainder of dredging for period of analysis, plus freeboard and ponding
In situ sediment volume total cy
0
Freeboard and ponding (1 cycle requirement) cy
0
Total volume cy
0
Total Estimated
$/cy
Costs
$18
$0
CDF Construction Cost
$03
$2
Capping Old CDF
(after 14 cylces)
$2
$0
Capping New CDF
1
Based on in situ volumes or weights.
2
Based on processed volumes or weights.
3
Closure of existing CDF falls ouside period of analysis.
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