WSPC184

• File Number: 8200.766
• Description: Colorado River Basin - Gunnison River General Publications-Correspondence-Reports
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/17/2001
• Author: Unknown
• Title: Background Notes 2001 - RE-Colorado River Basin - Gunnison River - Marketable Pool-Blue Mesa Reservoir - As of 01-17-01
• Water Supply Pro - Doc Type: Report/Study

0025J4

For the period from January 1 through December 31: 300 cfs or as detl~rmined in
S.B.I{a), S.B.1(b), or S.B.1{c) below, whichever is greater. Provided,. however! that
the base instream flow shall never exceed 3,350 cfs. For the purpose elf section 5.B..
inflow is defined as the total forecasted unregulated inflow into Blue Mesa Reservoir as
of May 1 for the period from April 1 through July 31 in thousands of uere-feet (at).

(a) For the period from May 1 through July 25 and when inflow in thll,usands of afis
between 380 and 1,000, the base instream flow in cfs wilJ be equal to 1.129 multiplied
by the inflow minus 129 or, .

Base Instream Flow in cfs -= (1.129 x inflow in thousands of at) - 129::

(b) For the period from May 1 through July 2S and when the inflow itl thousands of af
is between 1,000 end 1,120, the base instre~ flow in cfs will be equal to 10.83
multiplied by the inflow minus 9,833 or,

Base Instream. Flow in cfs Ie (10.83 x Inflo~ in thousands of at) - 9.83:3;

(0) For the period from May 1 through July 25 and when the inflow in thousands of afis
greater than 1,120, the base instIeBm flow in cfs will be equal to 3.18 multiplied by the
inflow minus 1.264 or,

Base Instream Flow in cis = (3.18 x Inflow in thousands of at) - 1,264;

2. PeBk tlo.ws

For one day on an annual basis between May 1 and June 30, the mean l:laily flow in cfs
shall be equal to 6S multiplied by the inflow in thousands of sf raised 110 the 0.78 power
minus 3,300 Of.

Mean Daily Flow in cis = (65 x (Inflow in thousands of af 0.18)) - 3,30(1;

Additionally, as flow rates are rising from the minimum to peak flow, 1:he daily change in
mean daily flow shall not be greater thaQ 10% of the mean daily flow I(lfthe preceding
day or 500 cfs. whichever is greater;

Likewise, lIS flow rates are falling from the peak. flow to minimum flo'vV', the daily change
in mean daily flow shall not be greater than 10% of the mean daily fio'lV ofthe preceding
day or 400 cfs, whichever is greater;

C~. Ule: As decreed in the Partial Master-Referee RepOrt Covering All of the Claims of the
United States of America (pages 31 1-314 and 647-648) adopted by the Coun in the decree

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