FIRST REVISION BENEFIT FROM COORDINATION OF BROWNLEE WITH NORTHWEST POWER POOL TABLE I.-Minimum-year streamflows-1962-63 operating year-System prime power capability 1 1 Coordinated operation: Average megawatts Main Columbia River system.. Brownlee and Oxbow....... Total___ Independent operation of Brownlee: Total... Benefit from coordination 2.. 4, 623 396 5, 019 4, 561 316 4,877 142 1 Average capability during storage-drawdown season (Sept. 15 through Apr. 15). Annual loss at Brownlee and Oxbow with coordinated operation amounts to 3 average megawatts but can be made up with summertime secondary from Federal system. TABLE II.-Median-month streamflows-1962-63 operating year-Average capability during storage-drawdown period 1 Coordinated operation: Main Columbia River system. Brownlee and Oxbow... Total... Independent operation of Brownlee: Total... Benefit from coordination 2. Average megawatts 5, 398 432 5, 830 5, 332 331 5, 663 180 Storage drawdown period is Sept. 1 through Mar. 31 * Annual benefit at Brownlee and Oxbow with coordinated operation amounts to 29 average megawatts. TABLE III.-Minimum-year streamflows-1964-65 operating year-System primepower capability Coordinated operation: Main Columbia River system. Brownlee, Oxbow, and Hells Canyon.. Total__ Independent operation of Brownlee: Brownlee, Oxbow, and Hells Canyon....... Total.... Benefit from coordination 2 1 Storage drawdown period is Sept. 16 through Apr. 15. 1 Average megawatts 4, 620 618 5, 238 4, 558 499 5, 057 181 Annual loss at Brownlee, Oxbow, and Hells Canyon with coordinated operation amounts to 6 average megawatts but can be made up with summertime secondary from the Federal system, TABLE IV.-Median-month streamflows-1964-65 operating year-Average capability during storage-drawdown periodi Coordinated operation: Main Columbia River system.. Brownlee, Oxbow, and Hells Canyon.. Total.. Independent operation of Brownlee: Brownlee, Oxbow, and Hells Canyon.. Total... Benefit from coordination 2. Average megawatts 5, 398 688 6,086 5, 343 551 5, 894 192 1 Storage-drawdown period is Sept. 1 through Mar. 31. * Annual benefit at Brownlee, Oxbow, and Hells Canyon with coordinated operation amounts to 50 average megawatts. |