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Groundwater Development Project Appendix E SNWA Conceptual Plan of Development Note: The SNWA Conceptual Plan of Development was created by the SNWA. As such, page numbering for this appendix is independent of the other appendices in the document. Southern Nevada Water Authority Clark, Lincoln, and White Pine Counties Groundwater Development Project Conceptual Plan of Development March 2011 Prepared By: Prepared For: Southern Nevada Water Authority U.S. Bureau of Land Management 100 City Parkway, Suite 700 Nevada State Office Las Vegas, Nevada 89106 1340 Financial Boulevard Mailing Address: Reno, Nevada 89502 P.O. Box 99956 Las Vegas, Nevada 89193-9956 TABLE OF CONTENTS TABLE OF CONTENTS ................................................................................................................ ii LIST OF FIGURES ....................................................................................................................... vi LIST OF TABLES ........................................................................................................................ vii LIST OF ACRONYMS ............................................................................................................... viii 1.0 PURPOSE OF PROJECT .................................................................................................... 1-1 1.1 PURPOSE AND NEED ............................................................................................... 1-1 1.2 PROPOSED PROJECT ............................................................................................... 1-1 1.3 WATER RIGHTS ........................................................................................................ 1-3 1.3.1 SNWA Water ....................................................................................................... 1-5 1.3.2 Lincoln County Water .......................................................................................... 1-7 1.3.3 Other SNWA Groundwater Applications Not Part of GWD Project .................. 1-8 1.4 GOVERNMENT AGENCIES INVOLVED ............................................................... 1-9 2.0 PROPOSED FACILITIES ................................................................................................... 2-1 2.1 PIPELINES .................................................................................................................. 2-1 2.1.1 Main Pipeline ....................................................................................................... 2-8 2.1.2 Lateral Pipelines................................................................................................. 2-12 Spring Valley Lateral ..................................................................................................... 2-12 Snake Valley Lateral ...................................................................................................... 2-12 Cave Valley Lateral ....................................................................................................... 2-13 2.1.3 Temporary Construction Areas .......................................................................... 2-13 Staging Areas ................................................................................................................. 2-13 Caliente Construction Support Area .............................................................................. 2-13 Temporary Plant Nursery Sites ...................................................................................... 2-14 Temporary Construction Camps .................................................................................... 2-14 2.1.4 Borrow Pits ........................................................................................................ 2-14 2.1.5 Pipeline Valves .................................................................................................. 2-15 2.2 PRESSURE REDUCING STATIONS ...................................................................... 2-16 2.3 PUMPING STATIONS ............................................................................................. 2-18 2.3.1 Spring Valley North Pumping Station ............................................................... 2-20 2.3.2 Spring Valley South Pumping Station ............................................................... 2-20 2.3.3 Snake Valley North Pumping Station ................................................................ 2-23 2.3.4 Snake Valley South Pumping Station ................................................................ 2-23 2.3.5 Lake Valley Pumping Station ............................................................................ 2-26 2.4 REGULATING TANKS ........................................................................................... 2-26 2.5 WATER TREATMENT FACILITY/BURIED STORAGE RESERVOIR .............. 2-29 2.6 POWER FACILITIES ............................................................................................... 2-31 2.6.1 Power Lines ....................................................................................................... 2-32 2.6.2 Electrical Substations ......................................................................................... 2-34 Primary Electrical Substations ....................................................................................... 2-34 Secondary Electrical Substations ................................................................................... 2-39 2.7 ACCESS ROADS ...................................................................................................... 2-39 2.8 COMMUNICATIONS FACILITIES ........................................................................ 2-42 2.9 FUTURE FACILITIES .............................................................................................. 2-42 2.9.1 SNWA Future Groundwater Production Wells ................................................. 2-42 2.9.2 Future Collector Pipelines .................................................................................. 2-44 GWD Project - Conceptual Plan of Development ii March 2011 2.9.3 Future Pumping Stations .................................................................................... 2-45 2.9.4 Future Power Facilities ...................................................................................... 2-45 2.9.5 Future Access Roads .......................................................................................... 2-46 2.9.6 SNWA Future Facilities Summary .................................................................... 2-46 2.9.7 Lincoln County Future Facilities ....................................................................... 2-46 3.0 LAND REQUIREMENTS ................................................................................................... 3-1 3.1 PERMANENT AND TEMPORARY RIGHTS-OF-WAY ......................................... 3-1 3.2 FUTURE FACILITIES ................................................................................................ 3-1 4.0 CONSTRUCTION ............................................................................................................... 4-1 4.1 STANDARD CONSTRUCTION METHODS ............................................................ 4-1 4.1.1 Surveying and Staking ......................................................................................... 4-1 4.1.2 Clearing and Grading ........................................................................................... 4-1 4.1.3 Site Fencing ......................................................................................................... 4-1 4.1.4 Site Access ........................................................................................................... 4-2 4.1.5 Materials Storage ................................................................................................. 4-2 4.1.6 Sanitation, Water, and Power ............................................................................... 4-2 4.2 PIPELINE .................................................................................................................... 4-2 4.2.1 General Pipeline Construction Techniques .......................................................... 4-2 Trenching ......................................................................................................................... 4-3 Bedding ............................................................................................................................ 4-3 Pipe Laying and Welding ................................................................................................. 4-3 Upper Pipe Zone Backfilling ........................................................................................... 4-3 Trench Backfill ................................................................................................................ 4-3 Construction Water .......................................................................................................... 4-4 Hydrostatic Testing .......................................................................................................... 4-4 4.2.2 Special Pipeline Construction Techniques ........................................................... 4-5 Highway Road Crossings ................................................................................................. 4-5 Utility and Other Crossings ............................................................................................. 4-5 Steep Terrain ...................................................................................................................
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