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"}0!:; '" -..J W ,- .l ;)(.j;) , " .""~.: Water Quality Planning. According to sources'at the U.S, Environ- mental Protection Agency, U.S. Bureau of Reclamation, and Soil Conser- vation Service, several different water quality planning efforts are presently ongoing in the Upper Basin. The Bureau of Reclamation and Soil Conservation Service are cooperating in the planning and imple- mentation of the Colorado River Water Quality Improvement Program. The Soil Conservation Service has completed one study report on the Grand Valley Unit in Colorado. The Soil Conservation Service is initiating other programs for irrigation source and diffuse nonpoint source control of salts in the Lower Gunnison Basin Unit, Colorado, and in the McElmo Creek Unit, Colorado. The Bureau of Reclamation has initiated construction on the Paradox Valley Unit, Colorado, and the Bureau of Reclamation will begin construction on the Grand Valley Unit, Colorado, in 1979. Other units (Glen- wood-Dotsero Springs and Meeker Dome) are still under study (Strand, 1979). Six 208 (areawide waste treatment management) draft plans for designated areas in the Upper Basin have been submitted. Final approval of these plans is expected in early 1979. Statewide 208 draft plans for nondesignated areas in Wyoming, Utah, and Colorado will be submitted in early 1979. Other efforts related to water quality planning and resource development are being carried out by various Federal agencies, no- tably the Geological Survey, Department of Energy, Environmental Protection Agency, and Water Resources Council. These plans are too numerous to list here. 'In addition, State health departments (or parallel agencies) are conducting water quality planning stud- ies relating to their iStiuance of National Pollutant Discharge Elimination System (NPDES) permits and to their other regulatory and planning responsibilities. GROUND WATER Location and Extent Ground water in the Upper Colorado River Region may be sufficiently large to aid EET development. However" because the resource has been used so little and because reconnaissance level investigations in many parts of the Region have not been promising, relatively few test wells have been drilled. Exceptions to this statement occur in the White and Yampa ~iver basins in Colorado and the San Juan River Basin in New Mexico. Price and Arnow (1974) provide an excellent overview of ground water resources in the Region. The bibliography sr.o',!ld also be consulted for references. The general impression, however, is that ultimate ground wa- ter recoverability, water quality, and connectivity with surface supplies throughout th" Region are conditions which are either unknown or poorly understood. The available studies are generalized in the fOllowing para- graphs by river subbasin. 3-23