9676

• UCREFRP Catalog Number: 9676
• Author: U.S. Department of the Interior.
• Title: Preliminary Analysis
• USFW Year: 2001.
• USFW - Doc Type: Wayne N. Aspinall Unit Operations and the Draft Endangered Fish Flow Recommendations for the Gunnison and Colorado Rivers.
• Copyright Material: NO

CONTENTS

Executive Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11

Introduction and Background .................................................... 1

Hydrology Modeling ........................................................... 2

RiverWare Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2

Fish and Wildlife Service (FWS) Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2

Effects on Aspinall Unit Purposes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6

General . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . , . . . . . . . , . . . . . . . . . , .. 6

Hydropower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . , . . . . . . . . . . ., 7

Fish and Wildlife .. . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . , . . , . . . . , . . .. 10
Recreation and Public Safety . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . .. 12

Flood Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , , , , , . . . . . . , . . . , . , . . . . . . . . .. 13

Compact Entitlement . . . . . . . . . , , . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . , . . , .. 14

Relationship with the Black Canyon Reserved Water Right. . . . . . . . . . . . . . . . . . . . . . . . . . .. 14

Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . .. 16

Conclusions and Recommendations .............................................. 17

ATTACHMENTS

Attachment A: RiverWare Hydrology Model Background

Attachment B: Data Summary from Hydrology Model Runs
B-1 Peak Flows, Gunnison River below Gunnison Tunnel (Black Canyon)
B-2 Peak Flows, Gunnison River at Delta
B-3 Peak Flows, Gunnison River near Grand Junction (Whitewater)
B-4 Blue Mesa Reservoir, End-of-Month Elevation
B-5 Blue Mesa Reservoir, End-of-Month Content
B-6. A verage Monthly Flows, Gunnison River below Gunnison Tunnel (Black Canyon)
B-7 Average Monthly Flows, Gunnison River near Grand Junction (Whitewater)