WSP03878

• File Number: 8220.106
• Description: Animas-La Plata
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 10/1/1992
• Title: Draft Supplement to the 1980 Final Environmental Statement
• Water Supply Pro - Doc Type: EIS

CONTENTS

Page

FRONTISPIECE MAPS

SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. S-1

CHAPrER I-Purpose and Need. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
Purpose, Need, and Project Authorization. . . . . . . . . . . . . . . . . . .. 1-1
Purpose and Scope of Supplement . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2
Purpose of Supplement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2
Scope of Supplement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-3
History of Project Since 1980. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-4

Introduction ......................................". 1-4
Colorado Ute Indian Water Rights Settlement ............. 1-4
Related Water Right Claims and Waivers . . . . . . . . . . . . . . . .. 1.5
Cost-Sharing and Project Phasing . . . . . . . . . . . . . . . . . . . . . .. 1-6
Additional Studies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-6
Relationships to Other ActivitieslProjects .................... 1-8

Dolores Project ..................................... 1-8
Uranium Mill Tailings Remedial Action Disposal Cell. . . . . . .. 1.8

La Plata Coal Mine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-8
Durango Sewage Treatment Plant Upgrade ............... 1.9
Operation of Navajo Dam ............................. 1-9
Navajo Indian Irrigation Project ........................ 1.9
Document Reference ................................... 1-10

Libraries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1.10
Bureau of Reclamation Offices" . . . . . . . . . . . . . . . . . . . . . . .. 1-10

CHAPrER II-Proposed Action. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-I

Introduction .......................................... II-I
1992 Proposed Action ................................... 11-2
Operational RefInements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
Design Refmements of Project Features ..................... 11.5

Relocations ........................................... 11-6
Northwest Pipeline and MAPCO Pipeline ................. 11-6
Relocation of CR 211 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.7
Durango Area Municipal Water Users Delivery System ...... 11-8
Durango M&I Pipeline ............................ 11-8
Shenandoah M&I Pipeline ......................... 11-9
Durango Pumping Plant and Intake Structure ............. 11-9
Interim Extension of Southern Ute Inlet Canal. . . . . . . . . . . . 11-10
Realignment of Ridges Basin Inlet Conduit. . . . . . . . . . . . . . . 11.10
Alignment and Configuration of Ridges Basin
Dam and Related Features .. . . . . . . . . . . . . . . . . . . . . . . . . 11.10
Construction Access and Material Sources ............... 11.11
Ridges Basin Dan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-11

Riprap ....................................... 11-12
Durango Pumping Plant. . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
Recreation Development at Ridges Basin Reservoir. . . . . . . . . 11-12

ill