7750

• UCREFRP Catalog Number: 7750
• Author: U.S. Bureau of Reclamation.
• Title: Study of Alternative Water Supplies for Endangered Fishes in the "15-Mile Reach" of the Colorado River.
• USFW Year: 1992.
• USFW - Doc Type: \
• Copyright Material: NO

1
TABLE OF CONTENTS Page
' CHAPTER I
INTRODUCTION .................... 1
' Background .............. 1
The Endangered Species Act 1
...............................
The Recovery Implementation Program ......................... 1
Instream Flows for the Reach ..... ... ; . ; ..... ..... .... 2
Study Activities 3
Study Goals and Objectives ................................... 3
' Flow Recommendations and Supplemental
Flow Requirements for the Reach ................ 4
' Chapter II
Background ...................... 7
Operation of Grand Valley Diversions ............................. 7
History ............................................. 7
Grand Valley Diversions and the "Cameo Call" .................... 7
The Orchard Mesa Check .................................... 11
' Historic Need for the "Check" .............................. 11
Impacts to Orchard Mesa Irrigation District on Operating the "Check" ...... 12
Changes Under Full River Administration ....................... 12
Impacts on the 15-Mile Reach .............................. 13
1 CHAPTER III
GAINS ALONG THE REACH ................ 15
Observed Gains Along the Reach ................................ 15
' Estimated Gains Along the Reach ..... ..... ..... ..... .....: 15
Irrigation 15
Municipal and Industrial Returns ............................. 19
' CHAPTER IV
Utilization of Agricultural Water Rights .............. 21
' Economic Impact of Changing Agricultural Rights .... .. ..... ...... : 23
Junior and Upstream Water Rights 24
Upstream and Senior Rights ................................... 24
' Legal and Institutional Issues ............................... 27
Costs ..............................................28
Cost Summary ............................. ..........30
' Summary ............................................30
Irrigation Rights in the Grand Valley ............................. 30
Legal and Institutional Issues ............................... 31
Costs ..............................................32