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<br />. <br /> <br />. <br /> <br />TABLE 1 <br /> <br />SUMMARY OF RESERVOlR AND TURBINE CHARACTERISTICS <br />OF SAN MIGUEL CANYON PROJECT <br /> <br />Lower <br />Reservoir <br /> <br />Upper <br />Reservoir <br /> <br />Upstream Slope <br />Downstream Slope <br /> <br />12,000 <br />142 <br />1,100 <br />6,408 <br />Roller Compacted <br />Concrete <br />Vertical <br />0.75:1 <br /> <br />4,000 <br />130 <br />1,400 <br />7,120 <br />Embankment <br /> <br />Reservoir Size (acre-feet) <br />Dam Height (feet) <br />Crest Length (feet) <br />Full Elevation (feet) <br />Dam Type <br /> <br />3.5:1 <br />2.5:1 <br /> <br />Operating Characteristics for Each of Two Turbines <br />Installed Capacity <br />Design Head <br />Design Flow <br />Peak Unit Efficiency <br /> <br />85MW <br />680 feet <br />1740 cis <br />0.90 <br /> <br />Annual Average Power Production 368,000,000 kWh <br /> <br />Relrional Power Needs <br /> <br />Projections of electrical power needs are based on a tabulation of new capacity under construction, the <br />operating characteristics of existing systems and projected growth in demand. The supply side of projections <br />can be considered accurate for 5 years into the future since the potential new plants are already under <br />construction. Projections of growth in demand, however, are affected by uncertainties. <br /> <br />Of particular interest for the San Miguel Canyon Project is the reserve capacity over peak demand situation in <br />the power areas in Coiorado and contiguous states, The demand for peaking power and its value will be greater <br />, where reserve capacity margins are lower. The Western Systems Coordinating Council reports power needs in <br />Colorado and the Western United States. Projected margins over minimum reserve requirements for the three <br />closest potential peaking power market areas from the 1987 report of the Council to the U.S. Department of <br />Energy are presented in Table 2. The reserve margin is low for the California-Southern Nevada Area. The <br />following conclusion is stated in . A Review of the Adequacy of Electric Power Generating Capacity in the <br />United States, 1985-93 and 1993-Beyond', Energy and Environmental Policy Center, Harvard University, June <br />1986: <br /> <br />....For the California-Nevada subregion, demand projections indicate troublesome reserve margins are <br />here or on the immediate horizon. ....In the Rocky Mountain Power Area and in Arizona-New Mexico <br />demand growth projections imply clearly adequate supply through 1993....Transmission 1inks among <br />these subregions should help California.. <br /> <br />Page 2 <br />