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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1 <br />I <br />I <br /> <br />69 <br /> <br />Principal unit additions (200 MW or greater) during 1981 are tabulated <br />below. <br /> Net Capabil ity Fuel <br />Area Plant Name (MW) ~ <br />NWPP-CAN Battle River 5 360 Coal <br />RMPA Pawnee 1 485 Coal <br />AZ-NM Cholla 4 350 Coal <br />CA-NV Va 1 my 1 250 Coal <br /> <br />Hydro, pumped storage, cogeneration and wind units (having a <br />total capability of approximately 417 MW) which were scheduled to be <br />placed in service during 1981 have been delayed until 1982. In addition, <br />Diablo Canyon 1 (1084 MW) and San Onofre 2 (1100 MW) Nuclear Units which <br />were to be placed in service in 1981' have again been delayed and will not <br />be placed in service until 1982. <br /> <br />As of December 31, 1981 the WSCC interconnected bulk pDwer <br />system was comprised of 93,553 circuit miles of transmission. Net <br />additions durin9 1981 (4,06B circuit miles) included 1,317 miles of 500 <br />kV, 195 miles of 345 kV, 1,651 miles of 230 kV and 905 miles of 115-161 kV <br />transmission. <br /> <br />Principal transmission lines (over 100 circuit miles) which were <br />placed in service during 1981 are tabulated below: <br /> <br /> Operating <br /> Terminal Vo ltage Ci rcu it <br />Area Names Leve 1 Miles <br />NWPP-US Slatt-Marion Ckts 1 and 2 500 kV 310 <br />NWPP-US Kinport-Midpoint 345 kV 105 <br />NWPP-US Midpoint-Malin 500 kV 445 <br />NWPP-CAN Selkirk-Nicola 500 kV 188 <br />NWPP-CAN Selkirk-Cranbrook 500 kV 112 <br />RMPA Pawnee-Daniels Park 230 kV 116 <br />RMPA Laramie River Station-Ault 345 kV 110 <br />RMPA Laramie River Station-Story 345 kV 175 <br />CA-NV Val my-Tracy 345 kV 159 <br /> <br />The Wolcott-Basalt-Malta 230 kV line in Colorado, originally <br />scheduled for service in 19B1, has been delayed until late 1982. <br /> <br />SYSTEM DISTURBANCES <br /> <br />During 1981, twelve system disturbances occurred which were of a <br />reportable nature. Seven of the twelve disturbances occurred in the <br />Northwest Power Pool Area, two in the Rocky Mountain Power Area, one in <br />the Arizona-New Mexico Power Area, and two in the California-Nevada Power <br />Area. WSCC's goal of preventing widespread outages and minimizing the <br />duration of each outage was accomplished during 1981. The region's <br />islanding schemes, planned remedial actions and coordinated underfrequency <br />