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<br /> <br />. ro"1 . <br />.:.. \oJ , -:. <br /> <br />METROPOLITAN WATER DISTRICT <br /> <br />18 <br /> <br />ly careful manipulation of the system, particularly when starting <br />and stopping pumps and when changing generators at Boulder <br />power plant. There were 254 interruptions of service to Phoenix, <br />220 of which were due to disturbances on the Phoenix system. The <br />delivery of power to Phoenix was temporarily discontinued April <br />14, 1941, and had not been resumed at the end of the fiscal year. <br />Heavy rainfall on the Salt River watershed has provided the Salt <br />River Valley Water Users' Association with ample water for the <br />operation of its own hydroelectric pi ants. <br />Various schedules of continuous and alternate operation of plants <br />were followed to determine the most efficient plan and minimum <br />personnel required to meet the limited water requirements of the <br />near future in the coastal basin. For a period of ten weeks a plan <br />of alternate operation of pumping plants was tried. Intake and <br />Gene were operated alternately by the same crew, taking advan- <br />tage of the storage in Gene reservoir between the two lifts. Water <br />was released from Copper Basin in quantities sufficient for one <br />shift pumping at the three western plants, the shifts starting <br /> <br /> <br />~ <br /> <br />PUMP HOUSE: <br /> <br />TUNNEL <br /> <br />o 100 200 <br />I . I , , <br />S(.AI.E'NFttT <br /> <br />" <br /> <br /> <br />[1.4555' <br />~w=-~:.~_ ::!IWUO' <br />[L4i2..5' --"?-3 <br /> <br />PUMP HOUSE <br /> <br />'" <br /> <br /><.Ul<l: <br /> <br />"" <br /> <br />Fig. 2. Intake pumping plant <br /> <br />. <br />w <br />> <br />. <br /> <br />o <br />o <br />< <br />. <br />o <br />" <br />o <br />u <br />