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.'. '~ it (.'t'. '3:316 14 MET R 0 POL I TAN W ATE R D 1ST R 1 C T vide television at Intake, Gene and Iron Mountain; constructing r:ew switchrack facilities at Camino to accommodate the new 84 mile East Hoover-Camino 230-kv transmission line, which was en- Ergized on January 29; providing a temporary tie connection to the Southe1'll California Edison Company at Hoover on October 16; and repairing the damage caused by the airpiane crash into the West Hoover-Camino 230-kv transmission line on December 31. There were 31 cases of trouble on the 438 miies of telephone line, mostiy of a minor nature such as broken or crossed wires, broken insulators and broken poles, which were also repaired by the line crew. The District's teiephone system is effectiveiy oupplemented by a radio communication svstem which now includes 42 mobile units and five base stations located at Eagie Rock, Gene, Iron Mountain, Chuckwalla Peak and Santiago Peak, the latter two base stations being controlled by microwave from Hayfieid and the La Ve1'11e Softening Plant, respectively, Voice controi facilities were added to the pumping piant base stations during the year, and now all base stations except Eagle Rock can be connected to the teleph011e "ystem, Power Resuurces The District obtains electric energy for pumping its share of Colorado River water into and through its aqueduct from three sources; Hoover power piant. Parker power piant and Southe1'l1 California Edison Company steam plants, Hoover power piant be- came the first source when in 1930, the District signed contracts with the United States obligating the District to take and/or pay for 35.2517 per cent of Hoover firm enel'g~' generatiun ur approxi- mately 1.450 million kwhI' during a 100 per cent firm energy year, These contracts also gave the District first right to any secondary energy that might be generated from time to time subject to the District's complete use of firm energy for pumping water, Two generating units, N5 and N6, with a totai generating capacity of ] 65,000 kw are presentiy a'8igned to the District for the generation of this energy, An additional generating nnit at Hoover power plant. N7 of 82,500 kw capacity, was authorized by the District's Board of Directors on Juiy 30, 1957, and was to be rei eased by the g-overnment to the District on August :31, 1961. This date has since been extended to October 31. 1961. to permit the State of Nevada to complete the overhaul and repair work before transfer to the Dis- triel's use, With the acquisition of Unit N7, the District wiii have ? total generating capacity at Hoover of 247.500 kw, The District's second sou;'ce of energy from Parker power plant became available when the use and benefits from Units 8 and 4 were transferred to the District b\' the Bureau of Reciamation at mid- night December 1:3. 1952, uj,on payment by the District to the United States of the unamortized cost amounting to $8,289,147,::\8, An operating agreement dated December 16, 1952. between the United States and the District divides the net ontput of the plant equally, with an allowance of 0,5 per cent for energ~' lost in trans-