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<br />{,.~(!"" <br />1......;0 <br /> <br />OPERATION AND MAINTENANCE <br /> <br />11 <br /> <br />The rates for firm and secondary energy at Hoover Dam which <br />are adjusted each operating year to reflect variations in cost, have <br />been as follows: <br /> <br />OPl.:RATING <br />YEAR <br /> <br />RATE IN MILLS <br />PER KWIIR <br />FIR~I SECOlliDARY <br /> <br />1937-1938 <br />1938-1939 <br />1939-1940 <br />1940-1941 <br />1941-1942 <br />1942'1943 <br />1943-1944 <br />1944-1945 <br />1945-1946 <br />1946-1947 <br />1947-1948 <br /> <br />1.163 <br />1.163 <br />1.163 <br />. ..... ...... 1.163 <br />1.163 <br />.. 1.172 <br />1.190 <br />1.254 <br />1.244 <br />1.220 <br />1.277 <br /> <br />0.340 <br />0.340 <br />0.340 <br />0.340 <br />0.340 <br />0.346 <br />0.357 <br />0.398 <br />0.392 <br />0.376 <br />0.413 <br /> <br />Hoo-vri' power <br />Under its Boulder energy contract the District is obligated to <br />pay the annual charges, approximating $380,000 per year, on two <br />82,500-kva generating units installed for its service in the Hoover <br />Dam power plant. The generating capacity thus available is con- <br />siderably in excess of the District's current requirements and thc <br />"urplus capacity is being u"ed to generate power for the Southern <br />California Edison Company, California Electric Power Company, <br />City of Los Angeles, and Reconstruction Finance Corporation. <br />Credits resulting from such use reduced the District's charges for <br />the operating year 1946-47 to $53,318.80. The two units produced <br />742,488,300 kwhr during the year, or 51 per cent of their maximum <br />capability at rated output. The District's generating cost amounted <br />to 0.399 mills per kwhI' used, and its cost of energy at transmission <br />voltage at Hoover power plant, including falling water rate plus <br />generating cost, was 1.619 mills per kwhr. <br />Use of the District transmission system by the City of Los <br />Angeles and Southern California Edison Company materially in- <br />creased the load factor and reduced the unit cost of trausmitting <br />energy over the District lines. For the operating year 1946-47 the <br />Edison Company paid 79.5 per cent of the costs of the joint line, <br />or $170,055.12, which includes an allowance for interest and depre- <br />ciation, as well as current maintenance expense. Other credits for <br />transmitting power amounted to $26,916.62. Calculated on the <br /> <br />\ <br />~ <br /> <br />\ <br />. J <br />