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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and tunnel system from Hunter Mesa makes
uncompetitive with alternative project
water supply.

such a project configuration
arrangements and a limited

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6. The simulated operation of a reservoir on Yank Creek
required that a demand be assumed since no clear irrigation service
area exists. A Yank Creek Reservoir with 4000 acre-feet of capacity
would produce a yield of about 2100 acre-feet for an assumed irriga-
tion demand of 1500 acres. A 10,000 acre-foot reservoir with a 5000
acre irrigation demand would produce a yield of about 5500 acre-feet.
Yank Creek Reservoir could also be used for other water supply pur-
poses such as municipal/domestic/industrial and ski-area snowmaking
augmentation plans.

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7. The East Divide Creek Dam and Reservoir would service an
area of 1950 acres on lower East Divide Creek. The yield would be
highly sensitive to the size of the reservoir. Reservoirs with sizes
of 2000, 4000, and 6000 acre-feet produce yields of 2000, 2804, and
3108 acre-feet, respectively. Reservoirs larger than 6000 acre-feet
do not produce significantly larger yields.

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8. The Owens Creek Dam and Reservoir as evaluated in
Scenarios C & D consists of a project configuration which does not
export water from the Owens Creek basin. Assumed irrigation demands
of 1000 acres and 1500 acres could realize yields of 1844 and 2363
acre-feet, respectively, from a 4000 acre-foot reservoir on Owens
Creek, upstream of its confluence with Buzzard Creek.

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9. The Buzzard Creek Reservoir and water conveyance system
would include provision for the importation of new water into the West
Divide Creek basin. The Buzzard Creek site has an average annual flow
of about 18,780 acre-feet, however, not all of this water can be
diverted. Minimum instream flows and channel maintenance flows
require a minimum release to Buzzard Creek totaling about 6200 acre-
feet annually. Potential losses include reservoir evaporation, canal
losses (estimated at 25%), losses due to insufficient canal or reser-
voir capacity, and losses when there is no demand. The water deli-
vered to the West Divide Creek basin would be a function of the
diverSion/pump capacity and reservoir storage capacity. Some deli-
veries are presented within the following table:

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