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<br />OPERATION AND MAINTENANCE.
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<br />The operation and maintenance of the pumping plants, trans-
<br />mission lines and telephone system required an average force of 80,
<br />Total replacements during the year were 29, a monthly turnover
<br />rate of 3 per cent. The replacements were mostly of utility men
<br />and kitchen helpers.
<br />The following table shows the hours of pump operation, the
<br />energy used, and the acre-feet of water delivered during the fi,;cal
<br />year 1948-49:
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<br /> PU\H' HOURS KWHR KWHR FOR WAl'f,;R
<br /> OF FOR STATION DELI\'E;RED
<br />PLANT OPERATION PUMPI!\C; SERVICE AcnE. FEET
<br />Intake 9.181.15 5i,453,OOO 196,400 170,5-11
<br />Gene. m.. 9.019,35 59,290,000 1,293,300 173,679
<br />Imn ~founlain . 9.281.45 26,653.000 670,100 157,410
<br />Eagle '\-1ountain . 9,345,40 81.519.000 464,300 ]55,081
<br />Hayfield. .., 9.285,92 82,637,000 463,300 155,.\51
<br />Camino 65,500
<br />Tolal. 307,552,000 3,1,52.900
<br /> KWilR
<br />Tota] energy used lln pumping sy~lem.. .... ,310,704,900
<br />Transmis",ion a11l1 tram.formation los"e",.. .. ...................... ..... I\,{'H.,I~
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<br />Tolal H,)U\'er enf'rgy lIsed for pumping system
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<br />m,322.319,21R
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<br />Puwer reson-rces a-nd use
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<br />The District's power supply, through contracts with the U. S. Bu-
<br />reau of Reclamation, is adequate to meet all requirements of the
<br />foreseeable future, The District owns the perpetual right to the use
<br />and benefit of two 25,000-kilowatt generating units installed in the
<br />powerhouse at Parker Dam, together with the right to utilize for
<br />the production of power slightly less than one half of the water
<br />passing Parker Dam. It has, until May 31, 1987, the right to the
<br />use of two 82,500-kilowatt generators, units N5 and N6 at Hoover
<br />Dam, and an option on a third 82,500-kilowatt generator, unit N7,
<br />The total of 297,500 kilowatts of generating capacity thus avail-
<br />able is sufficient to operate eight pumps in each of the five pumping
<br />plants.
<br />The District's allotment of 35.2517 percent of the firm energy at
<br />Hoover Dam amounted to 1,492 million killowatthours for the oper-
<br />ating year 1948-49 and will gradually decrease to 1,375 million
<br />kilowatthours in the year ending May 31, 1987. The District's
<br />share of the energy generated at Parker Dam is conservatively esti-
<br />mated at 300 million kiIowatthours per year, making the aggregate
<br />supply at least 1,675 million kilowatthours, or sufficient to pump
<br />800,000 acre-feet annually through the aqueduct lift of 1,617 fcet.
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