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<br />R~ll1mationlUSDA Units Included in the Plan. <br /> <br />The following paragraphs briefly describe the units which constitute the recommended <br />w implementation plan. Detailed information on each unit can be found in the fOllowing reports: <br />CD <br />m <br />'i <br /> <br />Quality. of Water - Colorado River Basin. Pro~ress Report No. 16, 1993, U.S. <br />Department of the Interior <br /> <br />1991 Joint Evaluation of the Salinity Control Pro~ram in the Colorado River Basin, <br />January 1992, Bureau of Reclamation, Bureau of Land Management and U.S. <br />Department of Agriculture, Soil Conservation Service <br /> <br />Monitorine and Evaluation Report - for each of the salinity control units currently being <br />implemented by the USDA Colorado River Salinity Control Program <br /> <br />Units Completed <br /> <br />Three Reclamation units (Meeker Dome, a portion of Las Vegas Wash and Grand Valley <br />Stage I) are completed. These units are preventing 73,700 tons of salt per year from reaching <br />the Colorado River. <br /> <br />Units Being Implemented <br /> <br />Paradox ValltO' (Reclamation): Local ground water comes into contact with the top of <br />a natural salt formation where it becomes nearly saturated with sodium chloride and surfaces in <br />the Dolores River channel in Paradox Valley, Colorado. The river picks up over 205,000 tons <br />of salt annually from this saline ground water source as it passes through the valley. <br /> <br />The salinity control program involves pumping the saline ground water, thereby lowering <br />the water table and reducing saline inflows to the Dolores River. The pumped brine is injected <br />into a deep well in the Paradox Valley. About 180,000 tons of salt would be removed annually <br />by this unit. <br /> <br />The injection test well, the brine pipeline, the surface treatment building and the injection <br />building have been completed. System testing and shakedown are underway and are scheduled <br />to be completed in about two years. <br /> <br />Grand ValltO' (Reclamation and USDA): The area within the Grand Valley Unit in <br />western Mesa County, Colorado, contributes 580,000 tons of salt annually to the Colorado <br />River. Most of the salts are leached from the soil and underlying Mancos Formation by ground <br />water that is recharged by deep percolation from canal and lateral leakage and onfarm <br />application. <br /> <br />The Reclamation program in the Grand Valley is being implemented in two stages. <br />Stage I, encompassing about 10 percent of the unit area, consisted of concrete lining 6.8 miles <br /> <br />4-4 <br />