C150307 Final Supplimental Impact Statement

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

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` i TABLE OF CONTENTS(continued)
Chapter Page No.
2.5.1.6.2 Development Program 2-127
2.5.2 Description of Refined Alternative 6 2-129
2.5.2.1 Water Supply for Refined Alternative 6 2-130
2.5.2.1.1 Sources and Amount of Water Supply 2-130
2.5.2.1.2 Depletion of San Juan River Water Supply 2-130
2.5.2.2 Development of Component of Refined Alternative 6
Commensurate with Refined Alternative 4 for Developing up
to 57,100 afy of Depletions to Serve M&I Needs 2-130
1 2.5.2.2.1 Purchase of Land and Water Rights to Yield
17,432 afy of Depletions 2-130
2.5.2.2.2 Coordinated Operation of Existing Storage
Reservoirs with Streamflows for Increased
Availability of Water under Refined
Alternative 6 2-135
2.5.2.2.3 Purchase of Storage Space in Red Mesa
Reservoir 2-136
2.5.2.2.4 Enlarging Lemon Reservoir 2-136
2.5.2.3 Development of Component of Refined Alternative 6 to
Purchase Land and Water Rights for 13,000 afy Depletion
(Commensurate with the Non-Structural Component of Refined
Alternative 4) 2-137
2.5.2.4 Cultural Resources Mitigation 2-138
f 2.5.2.5 Wetlands Mitigation 2-138
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2.5.2.6 Navajo Nation Municipal Pipeline 2-139
2.5.2.7 Conveyance Options to Deliver Municipal and Industrial Water
to Future End Uses 2-139
2.5.2.8 an Development Program for Refined
AlTotal ternative.2 6 d 2-143
2.5.2.8.1 Capital Costs 2-143
2.5.2.8Cost Annual Costs 2-144
2.5.2.8.3 Development Program for Refined Alternative 6 2-145
2.5.3 Common Elements of Refined Alternative 4 and Refined Alternative 6 2-147
2.5.3.1 Navajo Nation Municipal Pipeline 2-147
2.5.3.2 Land Requirements for Non-Binding Future Water Use For
Refined Alternative 4 and Refined Alternative 6 2-159
2.5.3.2.1 Land Requirements for Future End Uses 2-159
2.5.3.2.2 Land Requirements for Conveyance Pipelines 2-159
2.5.3.2.3 Land Requirements for Pumping Plants 2-162
2.5.3.2.4 Land Requirements for Water Treatment Plants 2-163
2.5.3.3 Construction Procedures and Impacts 2-163
q, 2.6 COMPARISON OF REFINED ALTERNATIVE 4 AND REFINED
ALTERNATIVE 6 2-167
II 2.7 RISKS ASSOCIATED WITH A WATER RIGHTS PURCHASE PROGRAM 2-167
2.7.1 Risk of Availability of Lands with Senior Water Rights 2-167
2.7.2 Risk Associated with Estimating Rate of Inflation of Land Prices 2-169
2.7.3 Risk Associated with the Assumption There Would Be No Disruption to
Market Prices of Land 2-170
2.7.4 Risk of Encountering Higher Costs Resulting From a Longer
Procurement Period for Land Purchases 2-170
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