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\ j , I I- " 'i I I - .....~ .. i.,'. ~.J CHAPTER 1 OPERA TION AND MAINTENANCE MAIN AQUEDUCT THE Intake pumping plant on the California shore of Lake Havasu. approximately two miles upstream from Parker Dam, is the intake of the Colorado River aqueduct. The aqueduct system is made up of the main aqueduct and the distribution facili- ties in the coastal area consisting of reservoirs, pipe lines. and water softening and filtration plant. The main aqueduct terminates 242 m-iles from Intake in Lake Mathews, which is the beginning of distribution. Included in the main aqueduct are the five pumping plants. the 230-kv transmission line bringing power from Hoover Dam, the telephone lines, the reservoirs, tunnels, canals, cut-and- covel' conduits, inverted siphons. paved branch roads from main highways to camps, and unpaved patrol roads. Construction of the principal features of the main aqueduct was completed late in 1939 and Colorado River water was first received at Lake Mathews on November 2, 1939. The original cost of the main aqueduct. the cost of additions and betterments. and the net construction cost as of June 30, 1948 are shown in table 2. These costs include preliminary organization and surveys. right of way and lands, construction utilities. Parker Dam and District share of the power plant, and subsequent additions and betterments charged to capital account. The net cost is after the deductions given in the table. Trm1HUl.1":;sion lines (old telephone s1J~terrt There were no unscheduled interruptions of power due to causes originating on the District system_ Faults on systems connecting to the District system caused seven interruptions of pumping. Interruptions and repairs of the telephone system for the year were normal in number and extent. Pllmping plants Pumping at Hayfield was discontinued from July 31 to Novem- ber 30. 1947, to permit further grouting operations in San Jacinto tunnel. Pumping was resumed on the latter date and continued with [9 ]