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<br />July 1973
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<br />SUHNMY SIlEf.TS
<br />
<br />COLORADO RIVER WATEn QUALITY IHPROVEMENT
<br />GLENWOOD J\Nl) DOTSERO SPRINGS
<br />
<br />LOCATION: Along the Colorado River hetween the mouth of the Roaring
<br />Fork River and the mouth of the Eagle niver in West-central
<br />Colorado
<br />
<br />AUTHORIZATION: Colorado River Storage Project, P.L. 84-485
<br />
<br />CURRENT STATUS
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<br />
<br />The Glenwood-Dotsero Springs constitute the second largest point source
<br />of salinity to the Colorado River system. The combined dischari:;es
<br />contribute annually approximately 25,000 acre-feet of w.1ter containing
<br />over 500,000 tons of salt. The feasibility investigations (begun in
<br />April 1972) of these springs have included the collection and chemica.l
<br />analysis of sprin[; flow Gamples and the measurement of the flows' of 18
<br />known springs that are considered amenable to collecti'on for desalina-
<br />tion. Topographic maps of the Dotsero area were made du~ing March and
<br />April 1973, and an electrical resistivity survey, conducted by Applied
<br />Geophysics of SnIt Lake City, Utah, was completed on May 1, 1973. This
<br />sur~ey waS done to help identify aquifers and geologic conditions govern-
<br />ing -the subsurface flow of the saline water. The next step, depending
<br />on availability of funds, is to drill wells, based on the geophysical
<br />rcconnendationG, to determine the feasibility of tapping the Galine
<br />wnter by pumping techniques.
<br />
<br />PLAN OF DEVELOPMENT
<br />
<br />During the preliminary studies, the following method~ of disposing tir
<br />treating the saline water were considered: (1) evaporation ponds; (2)
<br />dcep well injection, (3) plugging or grouting off the springs, and (4)
<br />various types of treatment plants. After curGory evaluation of each of
<br />these alternatives, it appeared that some type of treatment plant that
<br />would remove the bulk of the salts and return freshwater to the river
<br />would be most feasible. Two desalination plant alternatives were con-
<br />sidered. The first alternative would be to construct a desalination
<br />plant near each group of springs. namely one near' the Dotsero springs
<br />and one approximately six miles below the town of Clenwood Springs. TIle
<br />other alternative would be to collect the flows of the saline springs
<br />in the Dotsero area and. convey them 16 miles via pipeline to Glenwood
<br />Sprlngs. Ilere they would be joined by the flm,s of .the thermal springs
<br />collected in the vicinity of Glenwood Springs. The combined flo~s would
<br />be conveyed six miles further downstream to tile vicinity of ~ew Castle
<br />to a single desalination plant. The single plant alternative seems to
<br />be the most economically feasible, but the environmental impact of
<br />constructing a pipeline through Glenwood Canyon may be such that the
<br />
<br />construction of two desalination plants according to the first alternative
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