MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 2008 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 134456 510 133946 510 133946 ALBENI FALLS DAM ON 6957 137 6820 137 6820 BIG CLIFF DAM 13909 33 13876 33 13876 BONNEVILLE DAM & LAK 430918 2945 427973 2209 428709 COUGAR DAM 21284 53 21231 53 21231 DETROIT DAM 36300 146 36154 146 36154 DEXTER DAM & LAKE ON 11476 11 11465 11 11465 GREEN PETER DAM 51564 0 51564 0 51564 HILLS CREEK DAM & LA 23535 50 23485 50 23485 JOHN DAY DAM & LAKE 1108435 1521 1106914 1065 1107370 LOOKOUT POINT DAM & 61297 133 61164 133 61164 MCNARY DAM & LAKE WA 562501 2232 560269 780 561721 THE DALLES DAM & LAK 722766 1241 721525 918 721848 CHIEF JOSEPH DAM & E 1253084 809 1252275 809 1252275 ICE HARBOR DAM 263910 2208 261702 442 263468 LITTLE GOOSE DAM & L 360919 561 360358 337 360582 LOWER MONUMENTAL DAM 414684 529 414155 317 414366 LIBBY DAM & LAKE KOO 191856 627 191229 627 191229 LOST CREEK DAM 39590 322 39268 142 39448 LOWER GRANITE DAM & 337943 1347 336595 539 337404 FOSTER DAM 13495 70 13425 70 13425 GRAND COULEE DAM 2128522 2226 2126296 2226 2126296 HUNGRY HORSE DAM 94041 0 94041 0 94041 TOTAL 8283441 17711 8265730 11553 8271888