C150307 Final Supplimental Impact Statement

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

List of Tables
Pate No.
3.2-6 Summary of Flow Statistics for San Juan River at Four Corners,New Mexico for
Pre-and Post-Dam Historic Flows Future Condition with and without Refined
Alternative 4 for the Modeled Period 1929-1993 3-25
3.2-7 Mean, Minimum,and Maximum Monthly Average Flowof the La Plata River at Two
Locations With and Without Refined Alternative 4 3-27
3.2-8 Mean, Minimum, and Maximum Monthly Average Flow of the Animas Riverat Two
Locations for Future Conditions with and without Refined Alternative 6
3-30
3.2-9 Mean,Minimum, and Maximum Monthly Average Flow of the San Juan River at Four
Corners,New Mexico for Future Conditions with and without Refined Alternative 6 3-31
3.2-10 Increase in Average Monthly Flows in the Lower Pine River Resulting From
Transferring 10,000 Acres of Irrigation Depletion to Downstream M&I Use 3-33
P; 3.3-1 The Chemical Parameters Regulated along River ReachesPotentially Affected by the
iv Project 3-36
3.3-2 Water Quality Parameters Affected by Refined Alternative 4 for Colorado Portion
4 of the Animas River
k3.3-3 Water Quality Parameters Affected by Refined Alternative 4 for New Mexico Portion 3-47
of the Animas River 3-48
3.3-4 Water Quality Parameters Affected by Refined Alternative 4 for New Mexico
i " Portion of the La Plata River
3.3-5 Water 3-49
Quality Parameters Affected by Refined Alternative 4 for Mancos River 3-50
I 3.3-6 Water Quality Parameters Affected by Refined Alternative 4 for San Juan River at
Farmington,New Mexico 3-52
3.3-7 Water Quality Parameters Affected by Refined Alternative 4 for San Juan River at
' Shiprock,New Mexico
3.3-8 Water Quality Parameters Affected by Refined Alternative 4 for San Juan River at 3-53
Four Comers,New Mexico
3-54
3.3-9 Water Quality Parameters Affected by Refined Alternative 4 for San Juan River
i, between Four Corners,New Mexico and Mexican Hat,Utah 3-55
3.4-1 Wetland Vegetation Cover Types within Ridges Basin Reservoir Site 3-62
3.4-2 Examples of Representative Widths of Canal Wetland Vegetation 3-67
3.4-3 Loss of Upland Vegetation at Ridges Basin 3-69
3.4-4 Wetland/Riparian Vegetation Crossed by Water Conveyance Laterals 3-75
3.4-5 Riparian/Wetland Loss within 100,500,and 1,000-feet CorridorsAlong Water
Conveyance Laterals 3-75
3.4-6 Refined Alternative 6Summary of Wetland Impact Avoidance Assumptions and
Costs 3-78
3.6-1 Approximate Average Monthly Increases in the Pine RiverUnder Refined
Alternative 6 3-108
3.7-1 Special Status Plant Species Potentially OccurringWithin the Colorado and New
Mexico Region of the Project Area
3-111
3.7-2 Special Status Wildlife Species Potentially OccurringWithin the Project Area 3-113
3.7-3 Special Status Fish Species Potentially Occurring Within the Project Area 3-115
3.8-1 Properties of Soil Map Units Potentially Affected by Project Implementation 3-131
3.9-1 Summary of Surface Geologic Deposits and Paleontologic Resources in the Study
I Area 3-147
3.10-1 Estimated Land Purchases under Refined Alternatives 4 and 6 3-158
3.10-2 Refined Alternative 6 Non-Binding Water Pipelines 3-168
3.10-3 Crop Production 3-172
3.10 Refined Alternative 6 Crop Production 3-173
1; xxiv
ii'