WSP04119 - Laserfiche WebLink

Home Browse Search

3'81 '7 OPERATION AND MAINTENA~CE mission and an adjustment to compensate the United Sta~es for loss of energy resulting from the diversion of water by the. District for delivery to San Diego. The contract also provides for the payment, on substantially an equal basis, of the operation and maintenance expense and of any additional capital investment, except for the costs applicable to the general plant which are apportioned on the basis of 331/\ pel' cent to the District and 66% per cent to the United States, Generating units 3 and 4 at Parker, with a total gen- erating capacity of 50,000 kw, provide approximately 300 million kwhI' during a 100 per cent firm energy year at Hoover. After generating Unit N7 at Hoover power plant is available for District use, the two Colorado River power plants will provide the District with a total !(enerating capacity of 297.500 kw which is eufficient capacity to generate the full amount of firm energy avail- D ble to the District from Hoover and Parker power plants and such additional secondary energy that may become available for supple- menting firm energy in the pumping of the District's share of Colo- rado River water, However, firm energy at Hoover and Parker power plants in the amount of 1,750 million kwhI' during a 100 per cent firm energy year will pump only about 850,000 acre-feet of the 1,212,000 acre feet of Colorado River water available to the District. Since the District does not have a sufficient amount of energy from Hoover and Parker power plants to pump its full entitlement of Colorado River water during a 100 per cent firm energy year and since an adequate supply of secondary energy for District use is not available each year, a third source of electric energy is required to ,upply energy, The Southern California Edison Company became this third sourCe of energy when the "District-Edison 1958 Service and Interchange Contract" became effective on May 31,1958, Under the terms of the contract, the Southel'l1 California Edison Company supplies the District's additional energy requirements from its own generating resources at rates set forth in the contract, The contract Flso permits the Southern California Edison Company to inter- change energy with the District's system and also to have the free l1se of the District's unused transmission and generating capacity in return for furnishing the District with standby generating capacity in an amount equivalent to one of the District's Hoover p;enerating units, Opc,."Ung Contracts When the District first began pumping operations in 1939. the plllnping load required only a small portion of the firm energy and generating capacity which was available at Hoover, In addition, only a small portion of the available transmission capacity on the Di,trict's 230-kv transmission line system was being utilized, Since "II of the firm energy and the generating capacity had to be paid for bv the District whether it was used or not, endeavors were made to sell this unused enerp;y and capacity, In 1941 resale contract,; "'ere executed whereby District unused firm energy was resold to California-Pacific Utilities Company and Citizens Utilities Com- pany in amounts of not less than 10 million kwhI' and 25 million 15 -/ ,.' "-'