MONTHLY POWER PRODUCTION SUMMARY FOR: DEC 1997 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 37933 691 37242 691 37242 ALBENI FALLS DAM ON 19966 257 19709 257 19709 BIG CLIFF DAM 9435 40 9395 40 9395 BONNEVILLE DAM & LAK 556683 2604 554079 1953 554730 COUGAR DAM 9641 86 9555 86 9555 DETROIT DAM 31750 220 31530 220 31530 DEXTER DAM & LAKE ON 8098 31 8067 31 8067 GREEN PETER DAM 27056 85 26971 85 26971 HILLS CREEK DAM & LA 16116 80 16036 80 16036 JOHN DAY DAM & LAKE 941720 1647 940073 1153 940567 LOOKOUT POINT DAM & 21594 265 21329 265 21329 MCNARY DAM & LAKE WA 596317 3586 592731 850 595467 THE DALLES DAM & LAK 748203 1536 746667 1137 747066 CHIEF JOSEPH DAM & E 1214433 1589 1212844 1589 1212844 ICE HARBOR DAM 144721 2361 142360 472 144249 LITTLE GOOSE DAM & L 137461 653 136808 392 137069 LOWER MONUMENTAL DAM 146019 527 145492 316 145703 LIBBY DAM & LAKE KOO 229659 788 228871 788 228871 LOST CREEK DAM 21271 302 20969 133 21138 LOWER GRANITE DAM & 138339 1401 136938 560 137779 FOSTER DAM 12290 148 12142 148 12142 GRAND COULEE DAM 2294039 9868 2284171 9868 2284171 HUNGRY HORSE DAM 103856 0 103856 0 103856 TOTAL 7466600 28765 7437835 21114 7445486