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.: ......~-t 4' . , OPERATION AND MAINTENA~CE 33 An electrolysis suney was made on Schedules 1, 2 and 3 of the upper feeder from Lake Mathew. to South Fontana during July 1947_ Electric current conditions were found to be satisfactory_ On April 4, 1948 the flow to the Palos Verdes feeder was shut off at Eagle Rock control towel' to allow relocation of the Palos Verdes feeder in Orme Avenue where it crosses the new Santa Ana Park- way _ The line was drained and the work of removing and relocating the existing line. together with the necessary concrete encasement, was performed by the Griffith Company. During the shutdown an inspection of the drained portions of the line indicated the pipe to be in very good condition. Fill which had been placed against tunnel bulkheads during the war was removed from the west portal of the Pasadena tunnel. west portal of Monrovia No.3 tunnel and west portal of Monrovia No_ 4 tunnel in January 1948. Studies of potential annexation areas in Los Angeles. San Ber- nardino and Orange counties were made and also of the present and ultimate use of water, safe local supply, and the demand for imported water in the coastal plain_ Investigations were made relative to furnishing Long Beach with an additional service con- nection in the vicinity of its proposed Dominguez HiB reservoir, and relative to the request of the City of Compton for moving the pres- ent meter and making provision for 3 additional connections to the District line. A review, from the District's standpoint. was made of the applications of four separate agencies for membership in the San Diego County Water Authority. A study was made to deter- mine how an emergency delivery could be made to the City of New- port Beach this summer in the event membership in the District becomes assured. Survey work was done in the basin area west of Compton to determine a suitable location for the proposed lateral to deliver Colorado River water to the West Basin Municipal Water District in process of annexation to the Metropolitan Water District. O),erntio" 'Old mainte"'Olce of Sa" Diego aqued1lct The San Diego County Water Authority was annexed to the Dis- trict in December 1946. Construction of the San Diego aqueduct between the west portal of San Jacinto tunnel and the San Vicente reservoir of the San Diego city water system is covered in another part of this report. Under the terms of its agreement with the San Diego County Water Authority. the District assumed responsibility I I