WSPP283

• File Number: 8240.200.39.C
• Description: Colorado River Threatened-Endangered - RIPRAP - CFOPS - Water Availability
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 9/1/2003
• Author: Brown and Caldwell
• Title: Phase 2 Coordinated Facilities Water Availability Study for the Endangered Fishes of the Upper Colorado River - Final Report - 09-01-03
• Water Supply Pro - Doc Type: Report/Study

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1.1 PURPOSE

CHAPTER 1

INTRODUCTION AND PURPOSE

The purpose of this investigation is to summarize the results of a feasibility investigation of
19 alternatives to supply 20,000 acre-feet of water to the head of the 1S-Mile Reach for purposes of
recovering four species of endangered fish in the Colorado River in Colorado. This investigation is in
response to the findings, conclusions and of recoriunendations of the Phase 1 report for this project,
Phase 1 Coordinated Facilities Water Availability 5 tucfy for the Endangered Fishes of the Upper Colorado River
(Colorado Water Conservation Board, September 2000). These 19 alternatives include:

1. Expanded Coordinated Reservoir Operations

.

Alternative 1a: Green Mountain Reservoir reduced winter power operations.
Alternative 1a: Green Mountain Reservoir conjunctive pool operations.
Alternative 1 a: Preemptive release and water carried over in Green Mountain
Reservoir.

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.

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Alternative 1 b: Ruedi Reservoir modified operations.
Alternative 1d: Modify Colorado-Big Thompson (CB1) west slope facilities
operations.
Alternative 1e: Denver Water system modified operations.
Alternative 1 f: Bypass diversions to storage.
Alternative 19: Reduce constraints on Coordinated Reservoir Operations
(CROPS).

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2. Efficiencies of Conveyance and Distribution Facilities

3.

;

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Alternatives 3d and 3e investigated as components of 1 a: Re-analysis of Grand
Valley Project (GVP) and analysis of Grand Valley Irrigation Company
(GVIq water management for additional efficiency as a component of
Alternative 1 a, Green Mountain Reservoir operations.

New Storage Projects

· Alternatives 4f, 4g, 4k, 4n, and 40: New tributary storage facilities below
Shoshone Power Plant.

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Alternative 4m: New main stem storage facility.

4. Power Plant Operations and Scheduling

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Alternative Sa: East slope power operations and scheduling, investigated as a
component of Alternative 1 d: CBT west slope facilities operations.

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