WSP02732

• File Number: 8276.852
• Description: Moapa Valley Unit - Colorado River Salinity Control Program
• State: NV
• Basin: Colorado Mainstem
• Date: 2/1/1981
• Title: Salinity Control and Environmental Assessment
• Water Supply Pro - Doc Type: EIS

Page

ALTERNATIVE PLANS............................................................. 34
Future Without Sa1 inity Program............................................. 37
A 1 te rna t i ve 1............................................................... 39
A 1 ternati ve 2............................................................... 41
Comparative Analysis for Plans.............................................. 41
RECOMMENDED PLAN AND IMPLEMENTATION PROGRAM................................... 47

Pub1 ic Recommendations...................................................... 47
Basis for Selection of Recommended Plan..................................... 47
Additional Research and Demonstration Needs................... .............. 47

Effects of Recommended P1 an. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Implementation Program...................................................... 48

BIBLIOGRAPHY. . ... . . .. ... .. .. .... . . ...... ... .. . ..... ... . .. .... ... . . . .. . . . ...... 51

APPENDICES
Appendix A -
Appendix B -
Appendix C -

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.

TABLES
Table 1.

Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.

Environmental Evaluation - Inventory Worksheets.. ..............
Best Management Practices......................................
Biotic Communities and Major Wildlife Resources................

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

Wa ter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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............... . .. . . . ... .. . . .. . ... . .. . .. ... .. . .. ..

Annual level of Funding for 10 Year Installation Period,

Alternative 2,................................................... iv
Summary of Significant Effects of Alternative Plans. ............. vi
Summary Ratings, Environmental Evaluation........................ vii
Water and Salt Budgets Present Conditions (1978).... ..... ..... ... 14
Chemical Composition, Muddy River Surface Waters................. 16
Chemical Composition Drain Water~ Lower Moapa Valley............. 16
Chemical Composition, Ground Water............................... 16
Onfarm Irrigation Water Management Analysis (IRMA)..... .......... 35
Water and Salt Budget Alternative Plans.......................... 36
Economic Development Account, Alternative 2......... ............. 43
Environmental Quality Account, Alternative 2..................... 44
Environmental Qual ity Account, Alternative 2..................... 46
Implementation Program and Cost, Recommended Plan ............... 50

0026'13

A-1
B-1
C-l

i i i
6
7
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11
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20
25
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31