MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 2011 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 135678 469 135208 469 135208 ALBENI FALLS DAM ON 2708 167 2541 167 2541 BIG CLIFF DAM 10868 74 10794 74 10794 BONNEVILLE DAM & LAK 464825 2637 462188 1978 462847 COUGAR DAM 9584 124 9460 124 9460 DETROIT DAM 39990 240 39750 240 39750 DEXTER DAM & LAKE ON 10687 13 10674 13 10674 GREEN PETER DAM 33591 63 33528 63 33528 HILLS CREEK DAM & LA 14439 69 14370 69 14370 JOHN DAY DAM & LAKE 1271812 1762 1270050 1233 1270578 LOOKOUT POINT DAM & 36033 143 35890 143 35890 MCNARY DAM & LAKE WA 511231 2976 508255 780 510451 THE DALLES DAM & LAK 841650 744 840906 551 841099 CHIEF JOSEPH DAM & E 1184281 938 1183343 938 1183343 ICE HARBOR DAM 317414 1890 315524 378 317036 LITTLE GOOSE DAM & L 253038 535 252503 321 252717 LOWER MONUMENTAL DAM 477432 481 476951 289 477143 LIBBY DAM & LAKE KOO 227679 464 227215 464 227215 LOST CREEK DAM 26837 226 26611 99 26738 LOWER GRANITE DAM & 461654 1371 460283 548 461106 FOSTER DAM 4410 64 4346 64 4346 GRAND COULEE DAM 2242267 1658 2240609 1658 2240609 HUNGRY HORSE DAM 169225 0 169225 0 169225 TOTAL 8747331 17108 8730223 10663 8736668