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<br />'~;:"~S <br /> <br />CIIAPTER 2 <br /> <br />OPERA nON AND MAINTENANCE <br /> <br />DISTRIBUTION SYSTEM <br /> <br />THE di~tribution system is designed for the wholesale delivery <br />of water to the component areas of the Metropolitan Water <br />District and does not supply water directly to the individual <br />consumer. The system supplying the member agencies in Los An- <br />geles and Orange counties begins with a main storage reservoir <br />known as Lake Mathews, south of the City of Riverside. The 242- <br />mile main aqueduct delivers Colorado River water into this reser- <br />voir as required to maintain usable storage of from 80.000 to 100,000 <br />acre-feet. Discharge from Lake Mathews into the upper feeder of <br />the distribution system is controlled by the outlet tower within the <br />reservoir and the head works north of the dike. the two structures <br />being connected by the outlet tunnel through the west dike abut- <br />ment. The total length vf the distribution system as constructed in <br />t.he coastal basin was 1'/8.9 miles. In 1948 the transfer to the City <br />of Compton of 6.'/91 feet of the lateral serving that member city <br />was arranged. This sale reduced the length of the wholesale dis- <br />tribution system of the District in the coastal basin to 177.6 miles. <br />Delivery to the San Diego County area is made through the 71.1- <br />mile San Diego aqueduct, which diverts from the main aqueduct at <br />the west portal of San Jacinto tunnel. Including the 36.3 miles in <br />the northerly half of the San Diego aqueduct. which the District is <br />acquiring by annual payments to the San Diego County Water <br />Authority. the total length of the present distribution system in the <br />5-collnty coastal area is 2UL~1 miles. <br /> <br />Constrllction of the distribution slIstem <br /> <br />Construction of the distriuution system to serve the thirteen orig- <br />inal constituents of the District was completed in July 1941. Fol- <br />lowing the annexation of Coastal Municipal Water District in June <br />1942, the first enlargement of the system took place with the exten- <br />sion of the Orange County feeder from Santa Ana to the Coast <br />Highway at Corona del Mar. This extension was completed in Feb- <br />ruary 1944, To serve the City of Brea, which annexed to the Coastal <br /> <br />[ 22 ] <br />