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0J ~" (;.0 CJ ,'1 EFFECTS ON COLORADO RIVER Increase in salt load (tons) Stream depletion (acre-feet) Increase in salinity concentration at Imperial Dam (mg/l) Increase in salt load Stream depletion 37,600 76,400 3,5 10.6 Annual benefits Irrigation M.s.I Recreation Fish and wildlife enhancement Flood Control Total 8,420,000 1,979,000 156,000 64,000 22,000 7,481,000 Benefit-cost ratio - total benefits 1. 80: 1. 01 Local Interest Construction of the West Divide Project has long been advocated by local residents, western slope interests in Colorado, state officials, and private industry as a meAas of utilizing undeveloped land and water resources and possible stimulating development of the oil shale industry. Numerous oil companies have expressed interest in obtaining water from the project, The West Divide Water Conservancy District was formed April 17, 1964 by local residents as an instrument for project sponsor- ship and administration. The Colorado Water Conservation Board has assisted financially in estab- lishing stream gaging stations and obtaining aerial topography needed for the project investigations. The Colorado River Water Conservancy District has made water right filings for the project and has actively assisted in a number of other ways. In July 1970 the West Divide Water Conservancy District had detailed aerial topography made of about 1,300 acres of canal ;I area along West Divide Creek to expedite preconstruction activities when the project is funded. ') In February 7, 1972 the State of Colorado, Colorado River Water Conserva- ( tion District.. and the West Divide Water Conservancy District contributed ~,ooo toward investigations of alternative routes for project facilities. I