C150307 Final Supplimental Impact Statement

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

List of Tables
Page No.
2-41 Alternative 9 Impacts to Environmental Resource Areas 2-71
2-42 Alternative 9 Evaluation of Capability of Alternative to Meet the Purpose and Need 2-72
2-43 Alternative 9 Summary of Results of the Technical and Economic Factors 2-73
2-44 Alternative 10 Impacts to Environmental Resource Areas 2-75
2-45 Alternative 10 Evaluation of Capability to Meet Purpose and Need 2-75
2-46 Alternative 10 Summary of Results of the Technical and Economic Factors 2-76
2-47 Summary of Significant Environmental Impacts of the Alternatives 2-83
2-48 Summary of the Capability of Alternatives to Meet the Purpose and Need
Requirements 2-85
2-49 Summary of Technical and Economic Factors 2-89
2-50 Refined Alternative 4 Structural and Non-Structural Components Depletions 2-97
2-51 Refined Alternative 4 Summary of Water Sources and Amounts from Storage and
Purchase of Water Rights 2-98
2-52 Water Supply by Use for the Structural Component of Refined Alternative 4 2-99
2-53 Total Costs Refined Alternative 4 2-123
2-54 Summary of Average Annual Operating Costs For Full Project Operation Ridges
Basin Dam and Reservoir,Durango Pumping Plant, and Ridges Basin Inlet Conduit 2-126
2-55 Summary of Annual Operating Navajo Nation Municipal Pipeline 2-127
2-56 Refined Alternative 6 Summary of Sources and Amounts of Water 2-131
2-57 Future Water Use and Average Diversion and Depletion Summary for Refined '
Alternative 6 M&I Use at 50 Percent Efficiency 2-132
2-58 Capital Costs Refined Alternative 6 2-145
2-59 Comparison of Navajo Nation Municipal Pipeline Alternatives 2-154
2-60 Alternative NNMP-1 Impacts to Environmental Resource Areas 2-155
2-61 Alternative NNMP-1 Summary of Results of Technical and Economic Factors 2-155
2-62 Alternative NNMP-2 Impacts to Environmental Resource Areas 2-156
2-63 Alternative NNMP-2 Summary of Results of Technical and Economic Factors 2-157
2-64 NNMP-3 Impacts to Environmental Resource Areas 2-158
2-65 Alternative NNMP-3 Summary of Results of Technical and Economic Factors 2-158
2-66 Refined Alternative 4 and Refined Alternative 6 Future Water Uses and Acreage
Affected 2-160
2-67 Refined Alternative 4 Approximation of Potential Acreage Impacted by Construction
and Operation of Lateral Pipelines 2-161
2-68 Refined Alternative 6 Acreage Impacted by Construction and Operation of
Lateral Pipelines 2-162
2-69 Comparison of Refined Alternative 4 and Refined Alternative 6 2-168
3.1-1 Agricultural Land Assumptions Associated with Land Acquisition Under the Non-
Structural Components 3-2
3.2-1 Summary of Future Without Project(Baseline)Depletions in the San Juan River Basin 3-6
3.2-2 Modeled Diversion and Depletion Summary for Refined Alternative 4 With All
M&I Use at 50 Percent Efficiency 3-8
3.2-3 Modeled Diversion and Depletion Summary for Refined Alternative 6M&I Use at 50
Percent Efficiency 3-15
3.2-4 Mean,Minimum and Maximum Monthly Average Flow of the Animas River at Three
Locations for Future Conditions with and without the Project 3-21
3.2-5 Mean Monthly Flows for the San Juan River at Four Corners,New Mexico
(USGS Gage)with Refined Alternative 4 and without(Baseline Condition)Project
for the Modeled Period 1929-1993 3-24
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