7800

• UCREFRP Catalog Number: 7800
• Author: Burdick, B. D.
• Title: Conceptual Management Plan for Habitat Enhancement in Flooded Bottomlands, Gravel Pit at 29-5/8 Road, Colorado River Near Grand Junction, Colorado.
• USFW Year: 1994.
• USFW - Doc Type: \
• Copyright Material: NO

TABLE OF CONTENTS
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
LIST OF PHOTOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Objectives/Purpose . . . . . . . . . . . . . . . . . . . . . . . . 3
SITE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General .............................. 4
Criteria and Rationale for Site Selection . . . . . . . . . . . . . 4
Land Management . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Water Management . . . . . . . . . . . . . . . . . . . . . . . . . 6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Stream Flows . . . . . . . . . . . . . . . . . . . . . . . . 7
Fish and Wildlife Resources . . . . . . . . . . . . . . . . . . . . 10
CONCEPTUAL ECOLOGICAL MODEL . . . . . . . . . . . . . . . 10
Relation of Nutrients, Sunlight Penetration, and Warm Water
Temperatures to Phytoplankton Production . . . . . . . 10
Importance of Low Velocity Habitats to Zooplankton
Production . . . . . . . . . . . . . . . . . . . . . . 11
Major Limiting Factor Affecting Endangered Colorado River Fish
Populations . . . . . . . . . . . 12
Relation of Fo6d to Larval Fish Survival . . . . . . . . . . 12
Food Availability for Larval Endangered Fishes in the Upper
Colorado River Basin . . . . . . . . . . . . . . . . . 12
PROPOSED DEVELOPMENT/ACTION . . . . . . . . . . . . . . . . . . . . . . . 13
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Primary Development . . . . . . . . . . . . . . . . . . . . . . . . 13
Impacts of Development to Native Flora and Fauna . . . . . . . . . 15
PROPOSED OPERATION OF BOTTOMLANDS . . . . . . . . . . . . . . . . . . . . 15
Operational Criteria . . . . . . . . . . . . . . . . . . . . . 15
Impacts from Operations on Native Flora and Fauna . . . . . . . . . 16
PROPOSED EVALUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Factors to be Evaluated . . . . . . . . . . . . . . . . . . . . . . 16
LITERATURE CITED . . . . . . . . . . . . . . . . . . . . . . . . . . 19
APPENDIX A
Photographs of the Gravel Pit at 29-5/8 Road . . . . . . . . . . . 23
i i i