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The soil classification is summarized in the Project Lands section. <br /> The SCS studies concluded that Red Mesa Dam could be enlarged and that there is sufficient <br /> borrow material northeast of the dam for the construction. The recommendations of the SCS <br /> have been incorporated into the feasibility designs described for the selected plan. Geology and <br /> Soils Mechanic Reports prepared by SCS are included in Exhibit B. The location of the drill <br /> holes and test pits for the SCS studies are shown in Figure 2. <br /> There will be additional geotechnical investigations to supplement and verify the SCS <br /> conclusions when the final designs and specifications are prepared. <br /> 11.0 Evaluation of Alternatives <br /> The alternatives to enlargement of Red Mesa Reservoir are: (1) repair the existing dam to <br /> conform to Dam Safety requirements which would not provide domestic water and (2) the <br /> Animas-LaPlata Project. <br /> 11.1 Repair Alternative: The repair of the existing dam involves: (1) replacement of the outlet <br /> gate tower with a hydraulically controlled gate on the entrance to the outlet tunnel and (2) <br /> increasing the capacity of the spillway by raising the crest 3 feet and widening the spillway 20 <br /> feet. The spillway sizing is on temporary hold subject to the results of the State Engineers <br /> evaluation of probable maximum floods at elevations above 7500 feet; because of this study the <br /> Dam Safety Branch of the State Engineer has stated that the spillway repair will probably not be <br /> required until about the year 2005. The cost estimate for the repair is shown on Table 7 and was <br /> estimated to be $250,000 in 1995. <br /> This alternative does not provide domestic water. <br /> 11.2 Alternatives to Reservoir Enlargement: The LaPlata River basin is an extremely water <br /> short basin; there is an average flow at Hesperus of about 30,000 acre-feet per year which must <br /> be split with New Mexico according to the LaPlata River Compact. There is about 20,000 acres <br /> of land in Colorado that receives a partial supply of water, all of which is direct flow water <br /> except for the small amount stored in Red Mesa. All of the runoff typically comes in May and <br /> June, leaving all but the best water rights without water from about the first of July. <br /> 19 <br />