Project details - Collbran Project - Bureau of Reclamation

Full Irrigation Service	0 acres
Supplemental Service	21,305 acres
Temporary Irrigation Service	0 acres
Number of Irrigated Farms	190
Residential, Commercial, Industrial Lands	905 acres
Total Irrigable Lands	22,210 acres

Population Served:

Farm Population Served	528
Non-Farm Population Served	900
Total Population Served	1,428

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Area Irrigated and Crop Value

Year	Actual Area Irrigated (Acres)	Crop Value (Dollars)
1983	20,135	2,295,625
1984	20,115	2,488,350
1985	20,225	2,138,830
1986	20,245	1,881,483
1987	20,210	2,129,741
1988	20,295	2,472,105
1989	20,170	2,718,970
1990	19,880	2,124,640
1991	19,931	2,193,268
1992	11,100	1,182,232

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Project Water Supply

Project Water Quality

Project Water Supply

Current Conditions

Streamflow

Plateau Creek near Cameo, Colorado (USGS)
Colorado River near Cameo, Colorado (USGS)

Streamflow Forecast Map

Spring and Summer (NRCS)

Snowpack Information

Columbia River Snowpack Summary (NRCS)
Mountain Snowpack Maps for Colorado River Basin

Drought Index

Palmer Drought Index Map

Historic Conditions

Annual Precipitation

Normal	14.48 in
Maximum - 1969	22.02
Minimum - 1976	7.23 in
Collbran, Colorado 1961-1990

Temperature

Mean Annual	46.2 ?F
Daily Maximum - 08/02/1902	100 ?F
Daily Minimum - 02/08/1933	-36 ?F
Collbran, Colorado 1900-1996
Growing Season	155 days
Elevation of irrigable area	5,500-7,000 ft

Plateau Creek

Drainage area near Collbran, Colorado	88 sq mi
Annual discharge:
Maximum	acre-ft
Minimum	acre-ft
Average	acre-ft

Big Creek

Drainage area at Upper Station	20 sq mi
Annual discharge:
Maximum	acre-ft
Minimum	acre-ft
Average	acre-ft

Cottonwood Creek

Drainage area at Upper Station	20 sq mi
Annual discharge:
Maximum	acre-ft
Minimum	acre-ft
Average	acre-ft

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Project Water Quality

Colorado Headquarters - Plateau

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Facilities in Operation

Facilities in Operation

Storage Dams	16
Diversion Dams	3
Canals	37 mi
Power Plants	2
Pipelines and Penstocks	18 mi

The number of Storage Dams: 16 - includes main storage dam, Vega, and 15 privately-owned dams.

Storage Facilities

Cottonwood No. 2 Dike Dam

Diversion Facilities

East Fork Diversion Dam

Type	Concrete weir with embankment wings
Location	East Fork of Big Creek
Year Completed	1962
Dimensions:
Height above streambed	8 ft
Weir crest length	29 ft
Total crest length	120 ft
Weir crest elevation	9,863.2 ft
Volume, concrete	144 cu yd
Sluiceway:	6-ft square radial gate
Headworks:	3-ft square slide gate
Diversion capacity	30 cfs

Leon Creek Diversion Dam

Type	Concrete Ogee
Location	On Leon Creek about 8 miles east of Collbran, Colorado
Year Completed	1960
Dimensions:
Height above streambed	10 ft
Weir crest length	51 ft
Total crest length	230 ft
Weir crest elevation	8,026.0 ft
Volume, concrete	2,000 cu yd
Overflow weir capacity	2,000 cfs
Headworks:	Concrete with three 5-ft-square control gates.
Diversion capacity	350 cfs

Park Creek Diversion Dam

Type	Concrete Ogee
Location	On Park Creek about 8 miles east of Collbran, Colorado
Year Completed	1960
Dimensions:
Height above streambed	8 ft
Weir crest length	16 ft
Total crest length	140 ft
Weir crest elevation	8,020.2 ft
Volume, concrete	1,000 cu yd
Overflow weir capacity	700 cfs
Headworks:	Concrete with three 4-ft-square control gates.
Diversion capacity	150 cfs

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Carriage Facilities

Leon-Park Feeder Canal

Location:	From Leon Creek Diversion Dam to Park Creek and from Park Creek Diversion to Vega Reservoir.
Construction period:	1960-1961
Length	2.7 mi
Diversion capacity	350 cfs
Typical section, unlined:
Bottom width	16 ft
Side slopes	1.5:1
Water depth	5.8 ft

Southside Canal

Location:	From Vega Dam westerly to a point on Mesa Creek 3.25 miles south of Mesa, Colorado.
Construction period:	1959-1960
Length	32.8 mi
Diversion capacity	240 cfs
Typical section, unlined:
Bottom width	16 ft
Side slopes	1.5:1
Water depth	4.4 ft

Southside Tunnel

Location:	In the divide between Salt and Tea Creeks on alignment of Southside Canal.
Construction period:	1958-1960
Length	2,389 ft
Diversion capacity	240 cfs
Cross section:	Horseshoe
Height	6.25 ft
Width	6.25 ft
Lining thickness:	Concrete, 3.5-7 in

East Fork Feeder Canal

Location:	From East Fork westerly to Bonham Reservoir.
Construction period:	1961-1962
Length	1.3 mi
Diversion capacity	35 cfs
Typical section, unlined:
Bottom width	4 ft
Side slopes	1.5:1
Water depth	2.4 ft

Bonham-Cottonwood Pipeline

Type:	Pretensioned reinforced concrete pressure pipe
Location:	From Bonham Reservoir northwest and from Cottonwood Reservoirs No. 1, 2, 4, and 5, and Decamp, Kitson, Little Meadows, and Big Meadows Reservoirs north to a junction with Upper Molina penstock.
Construction period:	1959-1962
Bonham section:
Maximum capacity	50 cfs
Length	5.4 mi
Diameter
Minimun inside	31 in
Maximum inside	36 in
Cottonwood section:
Maximum capacity	28.3 cfs
Length	4.2 mi
Diameter
Minimun inside	18 in
Maximum inside	36 in

Upper Molina Penstock

Type:	Steel Plate
Location:	From Bonham-Cottonwood pipeline northwest to Upper Molina Powerplant, southwest of Collbran, Colorado.
Construction period:	1959-1961
Diameter	36 in
Length	4 mi
Capacity	50 cfs

Lower Molina Penstock

Type:	Steel Plate
Location:	From Upper Molina Powerplant to Lower Molina Powerplant, southwest of Collbran, Colorado.
Construction period:	1959-1961
Diameter	36 in
Length	4.7 mi
Capacity	50 cfs

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Power Facilities

Lower Molina Powerplant

Upper Molina Powerplant

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Last updated: Apr 18, 2011