WSP04343

• File Number: 7630.325
• Description: Wild and Scenic-Gunnison River-Curecanti Unit
• State: CO
• Basin: Gunnison
• Water Division: 4
• Date: 12/1/1986
• Author: WBLA inc
• Title: Gunnison-Curecanti-Curecanti Instream Flow Water Rights Study
• Water Supply Pro - Doc Type: Report/Study

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priorities from Water District 59 to the USBR projections. These senior

depletions are also shown in Table 2 above and total 53,940 acre feet.

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The same monthly demand pattern for the subordinated depletions was

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assumed for these senior depletions, which again are generally not

equivalent to diversions. It is assumed that most of the historic

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depletions above Blue M2Sd are included in these senior depletion$= The

senior depletions and the depletions benefitting from the subordination

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total 113,940 acre feet.

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E. Water Rights Below Black Canyon

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In the past, Blue Mesa Reservoir has frequently been operated to

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maintain a 200 cfs instream flow in the Black Canyon. This study examines

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the operation of Blue Mesa to maintain Black Canyon instream flows of 300

cfs and 600 cfs.

Such Blue Mesa operations to maintain higher instream

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flows should not increase the frequency of calls by existing downstream

divers ions.

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Calls from the Redlands Power Canal have been very infrequent (7

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instances over the last 26 years). The records for these calls were

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compared against the records of flow at the gauge just below the Gunnison

Tunnel to determine whether these calls went past the North Fork of the

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Gunnison, and up the mainstream into the area of study. The gauged flows

below the Gunnison Tunnel exhibited little, if any, response to the calls

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WBLA, Inc. 1909 Broadway, #3, Boulder, Colorado 80302

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