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I I ~ t ~ . I ~. '.... -"c I. \ ' ~...,. ) f:NGINEERING 55 of deformatio!ls were made during the draw-down and subsequent refilling of the reservoir, While the progressive expansion of in., terior concrete obsen'ed during previous years is continuing in both dams, the properties of the concrete have remained satisfac. tory, as shown by test,; of specimens drilled from the dam on successive occasio118, and the inspections have disclosed no indica. tion that structural st.ability has been impaired. Annexation stud':es With construction of the San Diego aqueduct, extending from the west portal of San Jacinto tunnel t.o the San Vicente reservoir of the city water system, under construction pursuant to a lease eontract between the City of San Diego and the United States, it became desirable for the San Diego interests to expedite negotia- tions for annexation of the affected area to the District. The San Diego County Water Authority, comprising the corporate areas of the City of San Diego and a number of smaller cities and districts in the, connty, approached the District in regard to formulating the terms of annexation, In order to arrive at an equitable deter- mination on the general basis that the new area should share equally with the previous constituent areas of the District in the benefits and costs of the aqueduct system. economic studies were made both by the District and by the Authority, and a number of conferences were attended by representatives of t.he affected agen- cies. As a result of these investigations it was determined that in consideration of the proposed annexation the District would pay one.half the true cost of the San Diego aqueduct, as sucb cost is fixed in the lease contract between the City of San Diego and the United States. -the Districttmaintaining. and ultinmtely to acquire the northerly part of the aqueduct represented by half the cOot, and to assume the respon- sibility of enlarging or paralleling the acquired portion of the aqueduct when necessary to satisfy the Authority's relluirements for water. Boundary descriptions were reviewed in connection with peti- tions for annexation to Coastal Municipal Water District of the cities of NewJlort Beach and Brea. and an unincorporated area in- cluding the Fairview Farms Mutual Water Company, in Orange County. The Coastal District has been a constituent area of the Metropolitan Water District since June 1942.