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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The subordination between Blue Mesa and Crystal was represented by

depleting virgin inflows to this reach by 20,000 acre feet per year under

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a priority senior to the Curecanti decrees but junior to the irrigation

water right for the Gunnison Tunnel; 10,000 acre feet was assumed to be

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depleted between Blue Mesa and Morrow Point, and 10,000 acre feet between

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Morrow Point and Crystal. The monthly demand pattern for these depletions

was assumed to be a maximum of 10,000 acre feet/month from April to July,

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with an annual maximum of 20,000 acre feet. This pattern simulates one or

more reservoirs which are drawn down by 20,000 acre feet throughout the

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year or during critical months, and which fill during the run-off months.

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In ASP, the subordination of the Curecanti decrees to bO,OOO acre feet

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of junior depletions apparently was accomplished by reducing the inflows

above Blue Mesa by roughly bO,OOO acre feet each year. This method

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effectively makes those diversions senior to all rights in the basin

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including the Gunnison Tunnel and does not provide for any development on

the tributaries between Blue Mesa and Crystal. In this study, the

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depletions under the subordination were operated in priority groups and

only the Curecanti decrees were subordinated.

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D. Senior Aggregated Water Rights

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The modelled depletions occuring under water rights senior to the

principal water rights were also derived by applying the distribution of

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WBLA, Inc. 1909 Broadway, 83, Boulder, Colorado 80302

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