9705

• UCREFRP Catalog Number: 9705
• Author: Green River Study Plan ad hoc Committee.
• Title: Study plan for the implementation and evaluation of flow and temperature recommendations for endangered fishes in the Green River downstream of Flaming Gorge Dam.
• USFW Year: 2007.
• USFW - Doc Type: Upper Colorado River Endangered Fish Recovery Program
• Copyright Material: NO

GREEN RIVER STUDY PLAN

111

February 2,2007

TABLE OF CONTENTS

ACKN"O WLEDGMENTS ....................................................................................................... ii

EXECUTIVE SUMMARY .................................................................................................... vi

1.0 INTRODUCTION ........................................................................................................... I

1.1 Purpose and Objectives........................................................................................ 1
1.2 Authority and Guidance Documents.................................................................... 3
1.2.1 Authority Documents............................................................................... 3
1.2.2 Recovery Program Guidance Documents .............................................. 10

1.2.3 Other Documents................................................................................... 13

2.0 METHODS.................................................................................................................... 14

2.1 Steps in Study Plan Development...................................................................... 14
2.2 Linkage of Studies to Anticipated Effects and Uncertainties ............................ 14
2.3 Evaluation of Studies ......................................................................................... 16
2.4 Information Needs, Revised or New Studies, and Prioritization....................... 16

3. 0 RECOMMENDATIONS............................................................................................... 17

3.1 Adequacy of Studies to Address Hypotheses ....................................................17
3.2 Prioritization of Hypotheses and Integration ..................................................... 17
3.3 Recommended Studies....................................................................................... 25
3.3.1 Floodplain Inundation for Larval Entrainment, Rearing, and
Subsequent Movement of Subadult Razorback Suckers into
the Mainstem in Reach 2........................................................................ 25
3.3.2 Backwater Formation and Maintenance for Young Colorado

Pikeminnow ........................................................................................... 30

3.3.3 Nonnative Fish Management in Reach 1 and Upper Reach 2 ...............33
3.4 Timeline for Recommended Studies and Integration ofInformation................ 35
3.5 Recommended RIPRAP Revisions............... .....................~............... ................ 38

LITERATURE CITED.......................................................................................................... 39

APPENDIX........................................................................................................................ .. A-I