MONTHLY POWER PRODUCTION SUMMARY FOR: APR 2007 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 201791 612 201179 612 201179 ALBENI FALLS DAM ON 16868 185 16683 185 16683 BIG CLIFF DAM 6211 39 6172 39 6172 BONNEVILLE DAM & LAK 428716 2956 425760 2217 426499 COUGAR DAM 10235 78 10157 78 10157 DETROIT DAM 24000 185 23815 185 23815 DEXTER DAM & LAKE ON 7586 10 7576 10 7576 GREEN PETER DAM 16921 94 16827 94 16827 HILLS CREEK DAM & LA 16082 70 16012 70 16012 JOHN DAY DAM & LAKE 954109 1804 952305 1263 952846 LOOKOUT POINT DAM & 30318 128 30190 128 30190 MCNARY DAM & LAKE WA 525899 2160 523739 760 525139 THE DALLES DAM & LAK 655425 1203 654221 891 654534 CHIEF JOSEPH DAM & E 1292631 1003 1291628 1003 1291628 ICE HARBOR DAM 67765 2215 65551 443 67322 LITTLE GOOSE DAM & L 162383 527 161856 316 162067 LOWER MONUMENTAL DAM 128547 477 128070 286 128260 LIBBY DAM & LAKE KOO 233730 718 233012 718 233012 LOST CREEK DAM 25967 335 25632 147 25820 LOWER GRANITE DAM & 147337 1250 146087 500 146837 FOSTER DAM 4835 96 4739 96 4739 GRAND COULEE DAM 2297982 2571 2295411 2571 2295411 HUNGRY HORSE DAM 96909 0 96909 0 96909 TOTAL 7352246 18717 7333530 12613 7339634