FLOOD08354

• County: Boulder
• Community: Lafayette
• Stream Name: Coal Creek , Waneka Reservoir
• Basin: South Platte
• Title: Major Basinwide Planning
• Date: 12/1/1980
• Prepared For: Boulder County
• Prepared By: Camp Dresser & McKee
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE 5
SUMMARY OF UNIT COSTS

I. Construction

1. Grasslined Channels 4-foot bottom, 60-foot easement
4-foot bottom, 50-foot easement
4-foot bottom, 40-foot easement

2. Concrete Channel

3. Cul verts

(a) CMP Pipe: 24-inch
48-inch

(b) Jacked R.C.P. 42-inch
60-inch

(c) Standard Corr. Metal Arch: 43-inch x 27-inch
50-inch x 31-inch
58-i nch x 36-i nch
65-inch x 40-inch

(d) Corr. Metal Plate: 6'-1" x 4'-7"
7'-0" x 5'-1"
8'-2" x 5'-9"

(e) Concrete Box Culverts: double, 4' x 8'
double, 4' x 10'
triple, 5' x 10'
double, 5' x 10'
doub 1 e, 4' x 12'

4. Concrete Trickle Channel

5. Concrete

6. Steel Reinforcing

7. Relocation of Utilities

8. Dumped Rip-Rap
9. Street Repair (36-foot ro ad... ay)

10. 6-foot Chain Link Fence

11. Seeding and mulching

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TABLE 5
SUMMARY OF UNIT COSTS cont'd

II. Land Acquisition Costs

1.
$116/L.F.
$100/L.F.
$ 83/L.F.
2.
$126/L.F.
3.
4.

Single-Family Residential
Developed Lots
Undeveloped Land

Multi-Family Residential, Undeveloped

Commercial Land

$18,000/ac.
$18,000/ac,
$7,000-12,000/ac,
$8,000-10,000 ac.
$1.41/sq,ft.
$1.50/sq.ft.
$4,500-7,000/ac.
$6,000-7,000/ac.

Industrial Land Developed
Lands with Floodplains and Subsidence Potential

$31/L.F.
$51/L.F.

$1,410/L.F.
$1 ,650/L.F.

$49/L.F.
$55/L.F.
$67/L.F.
$69/L.F.

$135/L.F.
$128/L.F.
$142/L.F.

$950 /L. F .
$1,OOO/L.F.
$1,650/L.F.
$1,050/L.F.
$1,100/L.F.

$22/L.F.

$242/C. Y .

$2,255/Ton

$61-$83/L.F.

$50/C. Y.

$30/L.F.

$16.50/L.F.

$.045/S.F.

5. Land zoned agricultural or open space

III, Other Costs

1. Engineering and Contingencies

35% of Construction Costs

2. Fi scal, Legal and Administrative
IV. Maintenance Costs (annual)

5% of Construction Costs

1. Grass-lined Channel

$2.00/L,F .*
$1.00/L. F ,
$0.50/L.F,

2. Concrete-lined Channel

3. Underground Conduit
4. Detention Ponds

$250/ acre*

*Mowing, debris pick-up, minor erosion repair, fertil izing and reseeding, and
minor sediment removal. Assumes native grasses,

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