WSP02017

• File Number: 8270.100
• Description: Colorado River Basin Water Quality/Salinity -- Misc Water Quality
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 9/1/1994
• Title: Lower Gunnison Basin Unit East Side Laterals - Colorado River Water Quality Improvement Program - SUPPLEMENT TO FEASIBILITY REPORT
• Water Supply Pro - Doc Type: Report/Study

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CONTENTS

Page

Chapter 1 INTRODUCTION ............................... 1
Authority and Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .'. . . . . . . . . . . . . 1
Related Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Related Studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . 3

Chapter 2 PLAN OF DEVELOPMENT. . . . . . . . . . . . . . . . . . . . . , , . 9
Program Concepts ...... . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . 9
Scope of Recommended Improvements.. ., . . ., . .... . .' . . . . . . 10
Description of the Improvement Program. . . . . . . . . . . . , . . . . . . . 10
Details of Lateral Systems and SmalJ Canal Segments ......... 13
South Canal Laterals . . . . . . . , . , . . . . . . . . . . . . . . . . . . . . . . 13
Loutzenhizer Small Canal Segments and Laterals . . . . . . . . . . 15
Selig Small Canal Segments and Laterals ................ 16
East Canal Laterals . . , . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Garnet Small Canal Segments and Laterals. . . . . . . . . . . . . . . 17
Summary of Estimated Construction Costs .................. 17
Lands and Rights-of-Way. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Relocation of Property of Others .......................... 19
Construction Performance and Administration. . . . . . . . . . . . . . . . 19
Reclamation Support Activities ........................... 20
Conditions Precedent to Construction ...................... 20
Development Program and Schedule ....................... 2l
Summary of Environmental Considerations. . . . . . . . . . . . . . . . . . 21
Environmental Protection Measures ....................... 27
Environmental Commitments ......................,..... 27
Habitat Replacement Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Chapter 3 DEVELOPMENT OF DESIGNS AND ESTIMATES. . . . . . 31
Source of Design Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Modifications of the Authorized Plan . . . . . . . . . . . . . . . . . . . . . . . 31
Design/Cost Estimating Concepts and Methodology . . . . . . . . . . . . 32
Construction Cost Estimates ............................. 35
DesignJEstimate Activities Necessary for Construction ..'...... 35

Chapter 4 ANALYSIS OF HYDROSALINITY IMPACTS .....,.... 43
Modifications to FR/FES Analysis ..........."............ 43
Seepage and Salinity Reductions ...................'..,... 44

Chapter 5 OPERATION, MAINTENANCE, AND REPLACEMENT .. 45

General ...............................,............. 45
Impacts of the Improvements . . . . . . . , . . . . . . . . . . . . . . . . . . . . . 45
Contract Requirements ...,.,........................... 46