FLOOD05064

• Designation Number: 205
• County: Larimer
• Community: Fort Collins
• Basin: South Platte
• Title: Master Drainageway Planning - Cooper Slough, Boxelder Creek, Fort Collins, Larimer County, Colorado
• Date: 8/1/1981
• Designation Date: 1/1/1983
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Table 29. Alternatives 2 and 3, Boxelder Creek Reach 2 and 3,
Channel Crossing Improvements at Lake Canal and
Larimer-Weld Ditch (not included in economic analysis).

Table 30. Alternatives 2 and 3, Cooper Slough Reach 2
Detention Storage QuantitieA and C0St
Estimate for Pond West of Cooper Slough

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Quantity

Unit Cost

Total

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Total

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Item

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1500

$ 30,000

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Item Quantity Unit Cost
Excavation 108,000 cubic yards $ 3
Fill 3,600 cubic yards 2
4' CMP 680 linear feet 40
Trickle channel 1,200 linear feet 34
Riprap 300 cubic yards 50
Seeding 610,000 square feet 0.08

20 linear feet

$

Three 4 x 10 box culverts

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Eight 4 x 12 box culverts

150 linear feet

4000

TOTAL CONSTRUCTION COST

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Engineering & contingencies (35 percent of construction cost)

Fiscal, legal and administration (5 percent of construction, engi-
neering & contingencies, & land)

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TOTAL COST

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Annual Cost: 50-year life, 7-3/B percent

Operation and maintenance

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TOTAL ANNUAL COST

600,000

$630,000

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220,000

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42,500

$893,000

TOTAL CONSTRUCTION COST

67,BOO

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Engineering & contingencies (35 percent of construction cost)

500

$ 58,300

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Land Acquisition (14.0 acres @ $20,000)

Fiscal, legal and administration (5 percent of construction, engi-
neering & contingencies, & land)

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72

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TOTAL COST

Annual Cost: 50-year life, 7-3/8 percent

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Operation and maintenance

TOTAL ANNUAL COST

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$324,000

7,200

27,200

40,800

15,000

48,800

$463,000

162,100

280,000

45,300

$950,400

72,100

840

$ 72 ,940

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