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<br />. <br /> <br />PART V <br /> <br />COLORADO RIVER ~ATER QUALITY ASSESSMENT <br /> <br />Priority 30.--Green River. Problem: Stream channel <br />alteration. Impact6: Erosion, recreation, cold <br />water fishery. <br /> <br />..... <br />(;1 <br />~.. <br />C) <br /> <br />Priority 31.--Little Snake River. Probl€'m: Irriga- <br />, <br />t ion diversions and improperly treated sewage dis- <br />charge from the cormnunity of Baggl'i cause low flows <br />and low dissolved oxygen. Impacts: Recreation, cold <br />water fishery. <br /> <br />At this time, Statewide planning and detailed designs have been <br />initiated on sewage tre8tment projects, Io'ith a construction cost of <br />approximately $110,000,000. If adequate funds were available, the <br />Wyoming Department of Environmental Quality estimates construction could <br />begin on all these projects ....ithin 3 years, but such funds are not <br />available. Additional sources are necessary to augment funding under the <br />Clean Water Act; if these funds are not forthcaning. most of the projects <br />currently under design .....ill not be built. This .....ould result in a <br />de~radation of water quality within the State, including the Green River, <br />tributary to the Colorado River. <br /> <br />. <br /> <br />A municipal waste.....ater construction grant program funded by the <br />State of Wyoming is being prepared for submission to the 1983 ....yarning <br />Legislature. <br /> <br />Ground .....ater represents <br />Because ground water pollution is <br />wilter quality concern, Wyoming has <br />One of the potential sources of <br />mining in the Green River Basin. <br /> <br />22 percent of Wyoming's water use. <br />no..... recognized as a potential area of <br />enacted ground water protect ion laws. <br />ground ""ater pollut ion is the trona <br /> <br />Water from the Green Rive., used for domestic supply in Green <br />River and Rock Springs, \"'yoming, exceeded EPA's seconda.y drinking water <br />criteria for TDS and sulfates during much of the 1976-77 drought. During <br />winter base flow periods in dry years, this is a recurring problem. <br />lndustrial water uses for trona processing and steam po""er generation <br />also have high water treatment costs during these high TDS, low-flo.... <br />periods. These costs al:"e not part of costs per mg/L assessed at Imperial <br />Dam, but some local benefits could occur in \"'yoming ....ith successful <br />implementation of the Big Sandy River Unit of the Colorado River t..'ater <br />Qual ity Improvement Program. <br /> <br />2. Utah <br /> <br />. <br /> <br />Utah's 30)(b)!3J report indicates that of the 21 priorit... <br />stream segments in Utah, seven are within the Colorado River Basin". <br />ThE'se include: Price River and tributaries from the confluence .....ith <br />Green River to headwaters, the Duchesne River and tributaries from My ton <br />to headwatt"rs, Cottonwood Creek and tributaries from highway U-S7 to <br />headwaters, Fremont River throu~h Capitol Reef National Park to head- <br />waters, Virgin River and tributaries from Utah-Arizona State line to <br />headwaters and San Ra fael River from confluence Io-i. th Green River to <br />confluence ....ith Ferron Creek. <br /> <br />15 <br />