WSP02006

• File Number: 8220.130.J
• Description: West Divide Project
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 8/8/1986
• Author: Hydro-Triad Ltd.
• Title: Reformulation of the West Divide Project - Executive Summary - August 8 - 1986
• Water Supply Pro - Doc Type: Report/Study

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Diversion/Pump Capacity

(ds)

Buzzard Reservoir
Capact ty
(ac-ft )

Ave rage An nua 1
Quantity Delivered:
(ac-ft )

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100 cfs can1l1 100* 4,745
100 c,fs canal 7,,000 7,703 (similar
to scenario D-I)
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

The water which could be delivered to the West Divide, basin
from the Buzzard Creek basin does not increas", 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sometimes used in place of water whIch might o:therwise be' withdrawn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.

10. The Upper and Lower Mamm Creek Reservoirs provide' storage.
which is useful in meeting the demands for water on Hunte r 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 'vo.J,ume,
basis) than' storage in Mamm Creek.

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: I) small futur.e 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 develop,ment; and, 3) a
fully developed future scenario which includes extensive development
including oil shale plants; additional irrigation demand and Denver's

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