7748

• UCREFRP Catalog Number: 7748
• Author: Western Water Consultants, I.
• Title: Final Report on Little Snake River Depletions by Pot Hook, Three Fork and Powder Wash Rights.
• USFW Year: 1990.
• USFW - Doc Type: Laramie, WY.
• Copyright Material: NO

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LITTLE SNAKE RIVER DEPLETION STUDY
TABLE OF CONTENTS
PAGE
CHAPTER
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . 1
1.1 Background . . . . . . . . . . . . . . . . . . . . 1
1.2 Purpose and Scope of Work . . . . . . . . . . . . . . 2
1.3 Study Area . . . . . . . . . . . . . . . . . . . . 3
1.4 Subject Water Rights . . . . . . . . . . . . . . . . . 5
2.0 STUDY APPROACH . . . . . . . . . . . . . . . . . 8
2.1 General Description of WIRSOS Model . . . . . . . . . . 8
2.2 Previous WIRSOS Studies on Little Snake River. . . . . . . 10
2.2.1 WIRSOS Input Data . . . . . . . . . . . . . . 10
2.2.1.1 Inflows . . . . . . . . . . . . . . . . . . 12
2.2.1.2 Water Rights . . . . . . . . . . . . . . . . 12
2.2.1.3 Irrigation Use Efficiencies and Return
Flow Schedules . . . . . . . . . . . . . . 15
2.2.2 Previous WIRSOS Model Runs . . . . . . . . . . 16
2.2.2.1 Present Modified Conditions (PMC) . . . . . . . 16
2.2.2.2 Environmental Baseline (EB) . . . . . . . . . . 16
2.2.2.3 Environmental Baseline with Sandstone Reservoir
Providing Supplemental Irrigation and
Municipal Water (EB/SS-M) . . . . . . . . . 17
2.2.2.4 Environmental Baseline with Sandstone Providing
Supplemental Irrigation and Municipal Water,
and Industrial Water (EB/SS-I) . . . . . . . . 17
2.3 Summary of Study Approach . . . . . . . . . . . . . . 18