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<br />DIVERSION STRUCTURE
<br />
<br />Assume structure is ca~able of carrying 12,000 c.f.s. from Elm Creek
<br />Approximate slope of diversion channel: ,0035
<br />Yetted perimeter: 500 feet (also approximately width of channel)
<br />Area: 1,950 square feet
<br />n: .035
<br />Length of channel: 2,500 feet
<br />Total volume of channel: 4,875,000 cubic feet
<br />180,556 cubic yard
<br />
<br />Land required: 1,250,000 square feet (29 acres)
<br />Levee and closure at railroad on county road:
<br />
<br />Levee height: 6 feet
<br />Top width: 10 feet
<br />Sideslope: 3:l
<br />Total length: 400 feet
<br />Total volume of fill for levee:
<br />
<br />67,200 cubic feet
<br />2,500 cubic yards
<br />
<br />Culvert at county road bridge: Two 72-inch culverts - 30 linear feet
<br />County Road: assume 6-inch unreinforced concrete pavement
<br />
<br />Remove 24 x 300 feet
<br />Pave 24 x 300 feet
<br />
<br />Item Cost
<br />
<br />Land
<br />Channel excavacion
<br />Fine grading
<br />Levee compaction
<br />Levee topsoil
<br />(6 inches)
<br />Seed and mulch
<br />Remove county road
<br />Replase county road
<br />Closure structure
<br />Flood warning
<br />Culvert at bridge
<br />Levee for southwest
<br />town
<br />
<br />Ouantitv
<br />
<br />29
<br />180,700
<br />2,000
<br />2 ,500
<br />
<br />360
<br />0.44
<br />7,200
<br />800
<br />1
<br />2
<br />60
<br />
<br />2,000
<br />
<br />Unit
<br />
<br />'acre
<br />c.y.
<br />c,y.
<br />c.y.
<br />
<br />c.y.
<br />acre
<br />s.f.
<br />s.y.
<br />l.s.
<br />l.s.
<br />1. f.
<br />
<br />1. f.
<br />
<br />Subtotal
<br />
<br />"
<br />',', 7,200 square feet
<br />7,200 square feet
<br />800 square yd
<br />
<br />Unit Cost
<br />
<br />$ 1,200,00
<br />2.00
<br />.22
<br />.50
<br />
<br />2.60
<br />680.00
<br />1.25
<br />~5.25
<br />10 , 000. 00
<br />4,000.00
<br />250,00
<br />
<br />29.07
<br />
<br />Plus 30%
<br />
<br />$ 10,440
<br />l08,420
<br />132
<br />375
<br />
<br />281
<br />90
<br />2,700
<br />3,660
<br />3,000
<br />2,400
<br />4,500
<br />
<br />l7,442
<br />
<br />Engineering and design aC 15%
<br />Supervision and administr~tion at lO%
<br />
<br />Total
<br />
<br />'-
<br />
<br />Total
<br />
<br />$ 45,240
<br />469,820
<br />572
<br />1,625
<br />
<br />1,217
<br />389
<br />ll,700
<br />15 , 860
<br />. 13,000
<br />10,400
<br />19,500
<br />
<br />75,582
<br />
<br />$664,905
<br />
<br />99,736
<br />66,490
<br />
<br />$831,13l
<br />
<br />Unit costs are based on project estimate along Yood River and Yarm
<br />Slough near Grand Island and the Means Building Construction Cost Data
<br />1991 Manual, 49th Edition,
<br />
<br />c-s
<br />
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