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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(cfs)

Buzzard Reservoir
Capacity
(ac-ft)

Average Annual
Quantity Delivered
(ac-ft )

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Diversion/Pump Capacity

-------------------.------------------------------------------------

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100 cfs canal 100* 4,745
100 cfs canal 7,000 7,703 (similar
to scenario D-1)
100 cfs canal 15,000 9,260 (similar
to scenario D-2)
25 cfs pump 1,500 3,911
25 cfs pump 7,000 6,859
* Diversion dam only

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The water which could be delivered to the West Divide basin
from the Buzzard Creek basin does not increase the project yield by
the amount delivered, especially when a Lower Kendig reservoir is used
in conjunction with a Buzzard Creek reservoir. The imported water is
sometimes used in place of water which might otherwise be withdrawn
from Lower Kendig Reservoir. This has the effect of retaining water
in Lower Kendig Reservoir as carryover storage which is used less
frequently, to alleviate shortages. The importing of water does
increase the yield of the system, usually by two thirds to one half of
the amount of water imported.

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10. The Upper and Lower Mamm Creek Reservoirs provide storage
which is useful in meeting the demands for water on Hunter Mesa;
however, the amount of Mamm Creek water available for storage is small
compared to the demand. Most of the irrigation water for Hunter Mesa
must come from other basins such as West Divide Creek and Buzzard
Creek. With the proposed canal network, storage in either Buzzard
Creek or West Divide Creek is slightly more efficient (on a volume
basis) than storage in Mamm Creek.

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Operation studies of the Colorado River basin were performed in
order to evaluate the potential for a senior water rights call on
planned project reservoirs. The operation studies assumed three dif-
ferent future scenarios for water resources development in the
Colorado River basin: 1) small future development which includes
existing conditions plus those West Slope projects which are virtually
assured of being constructed in the next few years, such as Rock Creek
Dam; 2) a moderate or intermediate future development; and, 3) a
fully developed future scenario which includes extensive development
including oil shale plants, additional irrigation demand and Denver's
Eagle-Piney Project among others.

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1-12

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