PROJ00170

• Contract/PO #: C153481
• 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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TABLE IV.4
MONTHLY WATER USE BY SENIOR DIRECT FLOW RIGHTS

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MONTH

WATER USE
PERCENl O~ MAXIMUM ACRE-FEEl

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January 0 0
February 0 0
March 0 0
April 50 2440
?-lay 66 3328
June 100 4879
July 100 5042
August 100 5042
Sep tembe r 50 2440
October 33 1664
November 0 0
December 0 0
TOTAL 24,835

The flows available for storage in Elkhead LaKe were estimated to average over
55,000 acre-feet per year. Annual flo..s in Elkhead Creek ranged from 12,400
acre-feet in 1977 to 127,400 acre-feet in 1984.

While the foregoing analysis provides an indication of water availability on
El khead Creek, the exi st i ng Cra i g water supply system is heavily dependent
upon flow conditions in the Yampa River.

The long-term average annual discharge in the Yampa River at Craig is
approximately 950,000 acre-feet per year. During the late sUr.J1ler months of
extremely dry years, the flow has been as low as 3 cfs. At thi s 1 evel of
flow, Craig's direct flow rights would not be adequate to meet its nee1s,
because there would not be enough flow in the river to allow full diversion.
Periods of 10'" flow were in the range of 3 to 5 cfs for the years 1933 a~d
1977.

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