WSP10995

• File Number: 8220.101.09
• Description: Glen Canyon Dam/Lake Powell
• State: AZ
• Basin: Colorado Mainstem
• Date: 12/21/1994
• Author: USDOI-USFWS
• Title: Final Biological Opinion-Operation of the GlenCanyon Dam as the Modified Low Fluctuation Flow Alternative of the Final Environmental Impact Statement-Operation of Glen Canyon Dam
• Water Supply Pro - Doc Type: Biological Opinion

TABLE OF CONTENTS

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INTRODUCTION. . . . . . . . . . . . . . . . .. .... . . . . . . . . . . . . . . . . . . .

BIOLOGICAL OPINION .................................. 3

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DESCRIPTION OF PROJECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

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BACKGROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . : . . . . . . . 3

OPERATION ........................... ~ . . . . . . . . . . . . . . . 4

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STATUS OF SPECIES ................................... 7

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ENDANGERED COLORADO RIVER FISHES .................... 7

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HUMPBACK CHUB ..................................... 7
General Status ........ .J_.__._..._,... . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Adults ..............;............................... 8
Soawning ............................................. 9

T ,.NaI and Juvenile ...................................... 10
Critical Habitat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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RAZORBACK SUCKER ................................... 12

General Status ........ '-"' . '.' . . . . . . . .. . . . . . . . . . . . . . . . . . . . .12

Adults .............................................. .13

Soawning ............................................ .14
r .aNal and Juvenile ...................................... 14
Critical Habitat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IS

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BALD EAGLE ......................................... IS

PEREGRINE FALCON. . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

KANAB AMBERSNAIL. ..................................17

ENVIRONMENTAL BASELINE ............................ .18

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