MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 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 261104 533 260571 533 260571 ALBENI FALLS DAM ON 23106 187 22919 187 22919 BIG CLIFF DAM 6222 38 6184 38 6184 BONNEVILLE DAM & LAK 472040 2622 469418 1966 470074 COUGAR DAM 10403 65 10338 65 10338 DETROIT DAM 26550 160 26390 160 26390 DEXTER DAM & LAKE ON 9959 10 9949 10 9949 GREEN PETER DAM 29666 83 29583 83 29583 HILLS CREEK DAM & LA 18344 62 18282 62 18282 JOHN DAY DAM & LAKE 1058611 1669 1056942 1168 1057443 LOOKOUT POINT DAM & 43255 123 43132 123 43132 MCNARY DAM & LAKE WA 589699 2232 587467 780 588919 THE DALLES DAM & LAK 648161 1230 646931 910 647251 CHIEF JOSEPH DAM & E 1313001 962 1312039 962 1312039 ICE HARBOR DAM 216563 2249 214315 450 216114 LITTLE GOOSE DAM & L 279548 578 278970 347 279201 LOWER MONUMENTAL DAM 307295 502 306793 301 306994 LIBBY DAM & LAKE KOO 288525 595 287930 595 287930 LOST CREEK DAM 38058 285 37773 125 37933 LOWER GRANITE DAM & 314498 1468 313031 587 313911 FOSTER DAM 7155 95 7060 95 7060 GRAND COULEE DAM 2303512 2543 2300969 2543 2300969 HUNGRY HORSE DAM 166909 0 166909 0 166909 TOTAL 8432186 18290 8413895 12091 8420094