C150307 Final Supplimental Impact Statement

• Contract/PO #: C150307
• Contractor Name: Animas La Plata
• Contract Type: Loan
• Loan Projects - Doc Type: Report

TABLE OF CONTENTS(continued)
,' Chapter Pane No.
(; 4.4.3 Short-term Use of Resources 4-12
4.5 IRREVERSIBLE AND IRRETRIEVABLE COMMITMENTS OF
RESOURCES 4-12
4.6 ENVIRONMENTAL JUSTICE AND INDIAN TRUST ASSETS 4-14
4.6.1 Indian Trust Assets 4-14
4.6.2 Environmental Justice 4-15
4.6.3 Affected Environment 4-16
4.6.3.1 Colorado Ute Tribes 4-16
4.6.3.2 Navajo Nation 4-16
4.6.3.3 JicarilIa Apache Tribe 4-16
4.6.3.4 Affected Environment-Water 4-16
4.6.3.4.1 Colorado Ute Tribes 4-16
4.6.3.4.2 Navajo Nation 4-17
4.6.3.4.3 Jicarilla Apache Tribe 4-19
4.6.3.5 Affected Environment-Trust Lands 4-19
4.6.3.5.1 Colorado Ute Tribes 4-19
4.6.3.5.2 Navajo Nation 4-21
4.6.3.6 Affected Environment-Mineral Resources 4-21
4.6.3.6.1 Colorado Ute Tribes 4-21
4.6.3.6.2 Navajo Nation 4-21
4.6.3.7 Affected Environment-Hunting Rights 4-22
4.6.3.7.1 Colorado Ute Tribes 4-22
4.6.4 Environmental Consequences 4-22
4.6.4.1 Indian Trust Assets-Significance Criteria 4-22
4.6.4.2 Environmental Justice-Significance Criteria 4-22
4.6.4.3 Impact Analysis 4-23
4.6.4.3.1 Refined Alternative 4 4-22
4.6.4.3.2 Refined Alternative 6 4-31
4.6.4.3.3 No Action Alternative 4-33
4.7 BIODIVERSITY AND SUSTAINABILITY 4-34
5 PURPOSE AND NEED,RECOMMENDATIONS AND COMMITMENTS 5-1
5.1 INTRODUCTION 5-1
5.2 EXPLANATION OF PURPOSE AND NEED 5-1
5.2.1 Purpose and Need Factors 5-1
■ 5.2.1.1 Yield 5-2
5.2.1.2 Practicability 5-4
5.2.1.2.1 Socioeconomic Issues 5-4
5.2.1.2.2 Changes in Water Use 5-5
; 5.2.1.2.3 Timing 5-5
5.2.1.2.4 Indian Trust Assets 5-6
5.2.2 Conclusion 5-7
5.2.3 Clean Water Act Analysis 5-7
5.3 RECOMMENDATION OF THE PREFERRED ALTERNATIVE 5-8
5.4 ENVIRONMENTAL COMMITMENTS
5-10
5.4.1 General Commitments 5-10
5.4.2 Water Resources and Hydrology Commitments 5-11
5.4.3 Water Quality Commitments 5-11
I5.4.4 Vegetation Commitments 5-11
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