MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 2005 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 280105 153 279952 153 279952 ALBENI FALLS DAM ON 25796 181 25615 181 25615 BIG CLIFF DAM 7903 31 7872 31 7872 BONNEVILLE DAM & LAK 426218 2560 423658 1920 424298 COUGAR DAM 6154 51 6103 51 6103 DETROIT DAM 28800 161 28639 161 28639 DEXTER DAM & LAKE ON 3014 18 2996 18 2996 GREEN PETER DAM 24062 0 24062 0 24062 HILLS CREEK DAM & LA 6868 51 6817 51 6817 JOHN DAY DAM & LAKE 908126 1455 906671 1018 907108 LOOKOUT POINT DAM & 18043 121 17922 121 17922 MCNARY DAM & LAKE WA 509627 2232 507395 780 508847 THE DALLES DAM & LAK 630150 1203 628947 890 629260 CHIEF JOSEPH DAM & E 1053927 918 1053009 918 1053009 ICE HARBOR DAM 194232 2181 192051 436 193796 LITTLE GOOSE DAM & L 446554 597 445958 358 446196 LOWER MONUMENTAL DAM 432326 645 431681 387 431939 LIBBY DAM & LAKE KOO 190402 528 189874 528 189874 LOST CREEK DAM 29041 348 28693 153 28888 LOWER GRANITE DAM & 421507 1360 420147 544 420963 FOSTER DAM 10362 72 10290 72 10290 GRAND COULEE DAM 1853917 2397 1851520 2397 1851520 HUNGRY HORSE DAM 144410 0 144410 0 144410 TOTAL 7651545 17263 7634282 11169 7640376