WSP10695

• File Number: 8240.300.02
• Description: San Juan River Recovery Implementation Program - Recovery Plans & Information
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 1/17/1997
• Author: Bio/West Inc.
• Title: San Juan River Recovery Implementation Program - Summary Report -- 1991 - 1996
• Water Supply Pro - Doc Type: Report/Study

1
','
\

.',1
'-I

m
~
r-
..-i
c.)
c~

TABLE OF CONTENTS

PREFACE

.' ~

EXECUTIVE SUMMARY ................................................ ii

TABLE OF CONTENTS.. . .... . . . . . . . . .. .... . . .. . . . . .. .... .. . . . . . . .. . . . vi

INTRODUCTION ..................................................... 1

STUDY AREA ....................................................... 2

DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . ,. . . . .. 2

5.1

Develop Interim Management Objectives for the Endangered
Fish Species and the Native Fish Community of the San

Juan River. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4

5.1.1. Colorado Squawfish Population Goal (Milestone). ........... 4
5.1.2. Razorback Sucker Population Goal (Milestone). . . . . . . . . . . . .. 4
5.1.3. Other Native Fishes Population Goals (Diversity, Abundance,
Distribution) (Milestone). . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
5.1.4. Evaluate, Integrate, and Report Research Findings Annually
and Make Recommendations Based upon These Findings. 4

. :.

" ':~

5.2 Identify, Protect, and Restore Habitats within the San Juan
River Basin Necessary for Recovery of the Endangered Fish
Species and Management of the Native Fish Community. ......... 5
5.2.1. Characterize Historic and Current Stream Channel
Geomorphology and Associated Riparian Zones. .......... 5
5.2.2. Determine Changes in Channel Morphology from
Historical Conditions with Changes in Flow Regime. . . . . . .' 12
5.2.3. Quantify and Compare I Contrast Available Aquatic Habitats
as a Response(s) to Natural and Manipulated Flows. ...... 14
5.2.4. Model Flow and Habitat Relationships. . . . . . . . . . . . . . . . . . .. 21
5.2.5. Determine and Monitor Habitat Use of Endangered and Other
Native Fishes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
5.2.6. Identify Limiting Habitats (Milestone). . . . . . . . . . . . . . . . . . . .. 32
5.2.7. Identify, Recommend, and Implement Flows Designed to
Maximize and Maintain Suitable Habitats for All Life Stages
of Endangered and Other Native Fish Species (Milestone). .. 33
5.2.8. Obtain Legal Protection for Flows Identified to Recover
Endangered Fish Species (Milestone). ................. 34
5.2.9. Determine the Need for, and If Necessary, Implement
Actions Designed to Accomplish Nonflow Physical
Habitat Modification for Recovery of Endangered
Fish Species. .................................... 34
5.2.10. Long Term Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 36

5.3. Identify, Protect, and Restore the Endangered Fish Species of
the San Juan River Basin and Manage the Native
Fish Community. ....................................... 37
5.3.1. Identify and Characterize the Historical and Current Fish
Species Community Structure. ...................... 37

;
., .'~

. . .,~:

: 'j

San Juan River Recovery Implementation Program
Summary Report

vi

17 January 1997
PR-576-2