MONTHLY POWER PRODUCTION SUMMARY FOR: DEC 1998 TOTAL GENERATION TOTAL STATION NET GENERATION POWER AUX NET GENERATION PROJECT IN MWH USE-MWH TO BPA-MWH USE---MWH REPORTED TO FERC DWORSHAK DAM 49556 700 48856 700 48856 ALBENI FALLS DAM ON 17166 236 16930 236 16930 BIG CLIFF DAM 13303 45 13258 45 13258 BONNEVILLE DAM & LAK 520442 2448 517994 1836 518606 COUGAR DAM 16762 101 16661 101 16661 DETROIT DAM 55100 214 54886 214 54886 DEXTER DAM & LAKE ON 10501 19 10482 19 10482 GREEN PETER DAM 27056 80 26976 80 26976 HILLS CREEK DAM & LA 20282 72 20210 72 20210 JOHN DAY DAM & LAKE 838527 1617 836910 1132 837395 LOOKOUT POINT DAM & 22098 232 21866 232 21866 MCNARY DAM & LAKE WA 526489 3468 523021 850 525639 THE DALLES DAM & LAK 670929 1609 669320 1191 669738 CHIEF JOSEPH DAM & E 922455 1591 920864 1591 920864 ICE HARBOR DAM 188031 2392 185639 478 187553 LITTLE GOOSE DAM & L 179676 624 179052 374 179302 LOWER MONUMENTAL DAM 195502 566 194936 340 195162 LIBBY DAM & LAKE KOO 310990 843 310147 843 310147 LOST CREEK DAM 32181 311 31870 137 32044 LOWER GRANITE DAM & 180856 1386 179470 554 180302 FOSTER DAM 14236 148 14088 148 14088 GRAND COULEE DAM 1691871 10566 1681305 10566 1681305 HUNGRY HORSE DAM 55304 0 55304 0 55304 TOTAL 6559313 29268 6530045 21739 6537574