WSP09828

• File Number: 8276.852
• Description: Moapa Valley Subevaluation Unit - Colorado River Salinity Control Project
• State: NV
• Basin: Colorado Mainstem
• Date: 6/1/1980
• Title: USDA Salinity Control and Environmental Assessment
• Water Supply Pro - Doc Type: EIS

ALTERNATIVE PLANS.............................................................
Future Without Salinity Program.............................................

Al ternative 1...............................................................
Al ternative 2...............................................................
Comparative Analysis for Plans..............................................

RECOMMENOED PLAN AND IMPLEMENTATION PROGRAM...................................

Pub1 ic Recommendations......................................................
Basis for Selection of Recommended Plan.....................................
Additional Research and Demonstration Needs.................................

Effects of Recommended P1 an. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Implementation Program......................................................

BIBLIOGRAPHY. . ..... .. . .. ....... .. . .. . .' ... . . . ...... ... ... ...... .. .. . ...... . ...

APPENDICES
Appendix A - Environmental Evaluation - Inventory Worksheets................
Appendix B - Best Management Practices......................................
Appendix C - Biotic Communities and Major Wildlife Resources................

FIGURES
Figure 1.
Figure 2.
Figure 3.
Figure 4-A.
Figure 4-B.
Figure 5.
Figure 6-A.

Figure 6-B.
Figure 6-C.
Figure 7.
Figure 8.
Figure 9-A.
Fi gure 9-B.
Figure 9-C.
Figure 10.

Location Map............................................................
Land Ownershi p.. .. .. . . .. .. .. .. .. .. .. . . .. . .. .. .. .. . .. . . .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. . .. ..
Program Area Map...................,...........................
Geologic Cross Section.........................................
Geologic Section...............................................
Geologic Map...................................................
Salinity Concentration of Total Dissolved Solids - Surface

Wa ter.. . .. .. .. .. . .. . .. I .. . . .. . .. .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. . . .. .. . .. .. . . .. .. . .. ..

Component Salt Loads - Muddy River................. ............
Cumulative Salt Load - Muddy River.............................

Soi 1 Map.......................................................
Sa 1 i ne So i 1 s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Agricultural Lands with Saline Soils - Upper Moapa Valley......
Agricultural Lands with Saline Soils - Lower Moapa Valley......
Agricultural Lands with Saline Soils - Lower Moapa Valley......

Erosion...Areas.................................................................................... ..

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TABLES
Table 1. Annual Level of Funding for 10 Year Installation Period,

Alternative 2,................................................... vii
Table 2. Summary of Significant Effects, ................................. ix
Table 3. Summary Ratings, Environmental Evaluation........................ x
Table 4. Water and Salt Budgets Present Conditions (1978)................. 21
Table 5. Chemical Composition, Muddy River Surface Waters................. 23
Table 6. Composition Drain Water, Lower Moapa Valley...................... 23
Table 7. Chemical Composition, Ground Water............................... 23
Table 8. Onfarm Irrigation Water Management Analysis (IRMA)............... 52
Table 9. Water and Salt Budget Alternative Plans.......................... 53
Table 10. Economic Development Account, Alternative 2...................... 64
Table 11. Environmental Quality Account, Alternative 2..................... 65
Table 12. Environmental Quality Account, Alternative 2..................... 66
Table 13. Implementation Program - Conservation Practices.................. 73

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