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w w 00 ...,. Planning for Stage Two of the Grand Valley Unit is underway. A precon~ struction report and draft environmental statement will be available in early 1985, allowing for a decision on construction start on Stage Two in May 1986. The USDA received appropriations of $1.7. $1.8, and $1.7 million, respec- tively, in 1979, 1980, and 1981 to initiate construction of onfarm improve- ments for reducing salinity. The SCS onfarm improvement program is underway and is an expansion and acceleration of an ongoing SCS program in the valley for providing cost-sharing and technical assistance and planning service for farmers to improve irrigation facilities and manage- ment pr act ices. Crystal Geyser Unit, Utah Crystal Geyser, a privately owned, abandoned oil test well 3.5 miles south of Green River, Utah, contributes about 3,000 tons of salt annually to the Colorado River system. Construction has been delayed indefinitely because of the high construction costs and poor cost-effectiveness for the small amount (0.3 mg/L) of salinity reduction. Las Vegas Wash Unit, Nevada Las Vegas Wash is a natural channel which drains the entire Las Vegas Valley watershed area and discharges into Las Vegas Bay, an arm of Lake Mead. Studies evaluating salt contributed by the wash are concerned mainly with the ll-mile reach upstream from Las Vegas Bay. The average discharge carries approximately 196,000 tons of dissolved solids annually. Construction began in 1977 but was delayed to allow time to reevaluate the changing ground-water conditions in the lower Las Vegas Valley. Data collection and analysis have been SUfficiently completed to indicate possible cost-effective plans, but the formulation of such plans is contingent upon the wastewater management practices of valley water users. A reevaluation of the original evaporation pond/desalting plan has resulted in consideration of new concepts for salinity control. One alternative being considered is a bypass channel to convey low salinity industrial cooling water past an area of highly saline soil, preventing ground-water infiltration and salt pickup. Continued close coordination with local interests will be necessary to gain a salinity control, waste- water, and wetlands park and recreation land use consensus. Bypass systems in the wash have a potential salt loading reduction of 71,000 tons per year. Colorado River Indian Reservation Unit, Arizona The Colorado River Indian Reservation has a total of 268,850 acres in the lower Colorado River Basin below Parker Dam in Arizona and California. The U.S. Supreme Court allocated water to irrigate 107,588 acres of this land, xv