MONTHLY POWER PRODUCTION SUMMARY FOR: APR 2006 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 320768 271 320497 271 320497 ALBENI FALLS DAM ON 14215 188 14027 188 14027 BIG CLIFF DAM 7027 34 6993 34 6993 BONNEVILLE DAM & LAK 550282 2890 547392 2168 548114 COUGAR DAM 6182 104 6078 104 6078 DETROIT DAM 17000 186 16814 186 16814 DEXTER DAM & LAKE ON 5399 25 5374 25 5374 GREEN PETER DAM 23566 66 23500 66 23500 HILLS CREEK DAM & LA 12706 102 12604 102 12604 JOHN DAY DAM & LAKE 1070918 1602 1069316 1121 1069797 LOOKOUT POINT DAM & 22414 135 22279 135 22279 MCNARY DAM & LAKE WA 569211 733 568477 760 568451 THE DALLES DAM & LAK 841586 1317 840269 975 840611 CHIEF JOSEPH DAM & E 1287183 1058 1286125 1058 1286125 ICE HARBOR DAM 322458 2195 320263 439 322019 LITTLE GOOSE DAM & L 456607 671 455936 403 456204 LOWER MONUMENTAL DAM 480449 517 479932 310 480139 LIBBY DAM & LAKE KOO 71396 643 70753 643 70753 LOST CREEK DAM 26027 323 25704 142 25885 LOWER GRANITE DAM & 420840 1308 419532 523 420317 FOSTER DAM 11506 83 11423 83 11423 GRAND COULEE DAM 2161795 3012 2158783 3012 2158783 HUNGRY HORSE DAM 224025 0 224025 0 224025 TOTAL 8923560 17463 8906098 12747 8910813