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'. . .' i~$' ,,' ,,~ k"j/..; BASAm PROJECT PROJECT PLAN, FEATURES, AND COSTS alon!'; the condult, cutoff collars would be constructed around the conduit at 20-foot intervals. Slide gates located in a gate chmnber would be utilized to control releases from the reservoir. Access to the gate chamber would be provided by a vertical shaft constructed over the cham- ber and connected to the dam crest by means of a steel walkway. No spillway would be required as the flow to the reservoir would be largely regulated by releases from the Ruedi Reservoir and diversions from Cattle Creek through the Mountain Meadow Canal. The natural drainage area above the Missouri Heights Dam j.s only about 1, square miles "ith a maximum probable annual runoff of about 3,000 acre-fcet. If necessary, this amolmt of water could be stored by utilizing a portion of the 10 feet of freeboard plallned for the dam. The water surface of the enlarged reservoir would cover an additional 1,50 acres of privately owned agricultural and grazing lands. Trees and brush in the reservoir basin would. be removed as required. No improvements of consequence are on lands required for the enlargement. Reconnaissance geological investigations have indicated that it would be practicable to raise the existing dam. A red sandstone, known as ~'aroon formation of Permian age, is the bedrock at the damsite. The depth of bedrock at the dam site is unknown. The existing dam appears to be stable, althOUGh some seepage losses do occur. The seepage should be further investigated when detailed studies are made. Materials for the enlarged dam, except free drainage gravels, are available in the immediate vicinity of the dam. Gravels for use as con- crete aggregate, construction of drains, and bedding for riprap could be obtained from the Roaring Fork River channel about 10 miles south of the dam site. Basalt Conduit The Basalt Conduit, with a capacity of 100 second-feet, would head at the outlet works of the Huedi Dam and meander west;rard along the southern slope of the Fryingpan River Canyon for approximately 10 miles to a point where i.t would cross by siphon to the north side of the river. Here the conduit would breillc out of the steep canyon into undulating bench lands over which it would continue northwest for approxirrate~v 12 miles to its terminus at the Missouri Heights Reservoir. The conduit's total length of about 22 miles would incluce 9.6 miles of open earth section, 10.5 miles of bench flume or conduit, and 1.9 miles of siphons. The canyon section traversed by the conduit is generally rough with steep sandstone ledges covered in most places vith talus accumulations mixed with residual soils. Most cross slopes in this section range from 40 to 70 percent. Brush, aspen, and coniferous timber occupy much of the canyon aligmnent and would have to be cleared. The conduit in this section would consist largely of lined canal, bench flume, or closed conduit. 14