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I I I I I I I I I I I I I I I t ~ ~ 1 42 another 10 percent during the remainder of the decade. Oil consumption is projected to remain relatively constant throughout the decade. Additional delays in the startup of the Diablo Canyon and San Onofre nuclear units would seriously affect the near term natural gas and oil consumption projections and significant delays in the Palo Verde, Allen and Intermountain units could seriously affect the long term gas and oil cDnsumption projections. The availability of natural gas from existing sources is significantly greater than projected two years ago but is expected to decline during the next ten years. Several California utilities are projecting the use of new sources in the estimates of gas availability. The new sources which are under development, primarily liquefied natural gas and gas from Alaska, are expected to be able to provide additional quantities of gas starting in 1985-1986. If the development of these new gas sources is delayed, additional quantities of fuel oil above those which are now projected may be required. Current estimates for the WSCC region indicate that gas consumption in 1991 will be 487,842 million cubic feet, which represents 60 percent of the gas used for electric generation in 1981. Table 39 provides a complete SUnlmary of projected oil requirements by area for each of the four areas and compares the requirements for median and adverse hydro conditions. Oil requirements will increase under adverse hydro conditions from 8 percent to 13 percent over those for median hydro conditions. This fact was clearly demonstrated during the 1977 drought when the actual oil requirement increased by 30 percent over the 1976 requirement due to adverse hydro conditions. A comparison of the actual 1981 energy sources for the U.S. systems of the WSCC region with the actual 1976 through 1980 energy sources is presented as follows: WSCC - U.S. SYSTEMS SOURCES OF ELECTRIC ENERGY GENERATION - PERCENT ACTUAL HYDRO CONDITIONS Source 1976 1977 1978 1979 1980 1981 ~ro 50 35 46 40 43 42 Coal 19 25 23 25 27 28 Oil 17 22 16 16 10 6 Gas 11 12 11 14 15 18 Nuclear 2 5 3 4 3 3 Geothermal 1 1 1 1 1 1 During 1981, net exports from the region's largest exporter, the U.S. portion of the Northwest Power Pool Area, were 21,808 GWH, nearly double the 1980 export of 11,740 GWH and 8 percent above the 1979 export. The export from the NWPP (including Canada) to CA-NV was 29,580 GWH (48.3 million equivalent barrels of oil) up from 10,742 GWH in 1980. Oil-burn requirements for the total WSCC area were 45,595 thousand barrels in 1981 which represents 67.6 percent of 1980's oil-burn requirement of 67,444 thousand barrels and 38.3 percent of 1979's