PROJ00259

• Contract/PO #: C153424
• Contractor Name: Colorado River Water Conservation District
• Water District: 0
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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or 2,250 acre-feet ~)re than the average annual diversion requirement.
Irrigation water shortages exist because the distribution of annual
flows does not coincide with the distribution of annual demand.
Engineering analysis has shown this shortage to average about 1.5
acre-feet per acre in the West Divide Creek irrigation system. The
addition of water storage faciH ties to the basin would permit late
season irrigation demands to be met more often, reducing shortages and
improving yields.

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About 1,950 acres are currently being irrigated in the East
Divide Creek basin, rnth an average diversion requirement of approxi-
mately 6,000 acre-feet. The annual average flow available for diver-
sion is 9,470 acre-feet, which is 3,390 acre-feet more than the
demand. Because there is no storage in the basin the annual irriga-
tion shortage in the basin is about 1.75 acre-feet per acre.

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The average annual flow in the Mamm Creek basin, from East,
Middle and West Mamm Creeks combined, is 5,650 acre-feet. The
existing irrigated acreage in the basin is approximately 1,900 acres
with an average annual diversion requirement of 5,930 acre-feet.
Average annual irrigation shortages in this basin are somewhat higher,
1.91 acre-feet per acre, than those found in the East and West Divide
Creek basins. The Mamm Creek basin includes Hunter Mesa, which is pre-
sently nonirrigated. Hunter Mesa, an area of about 4,700 acres, is
presently used to raise dry-land wheat. Most of the Mesa is class 1
land which would be very suitable for irrigation, if an economic and
reliable source of water were available.

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The Beaver Creek basin lies to the West of the Mamm Creek
basin. Presently irrigated acreage in the basin, which is on
Taughenbaugh Mesa, is about 1500 acres rnth an average annual diver-
sion requirement of 4,680 acre-feet. The average annual flow which
would be available for diversion and storage is approximately 3,900
acre-feet. Without storage in the basin, the average annual irriga-
tion shortage is about 1.5 acre-feet per acre.

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Yank Creek is a tributary of Thompson Creek located to the
southeast of the West Divide area. Thompson Creek enters the Crystal
River which joins the Roaring Fork at Carbondale. Only a small amount
of land is currently irrigated in the Thompson Creek basin, and most
of the irrigated land is served by water from the Crystal River. The
average annual flow which could be regulated by a storage site (Yank
Creek Dam) near the Thompson Creek gaging station is 12,280 acre-feet.

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The Buzzard Creek and Owens Creek basins are in the
Battlement Mesa Water Conservancy District southwest of the West Divide

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