MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 2003
 
                    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              269556              554               269002             554            269002
ALBENI FALLS DAM ON        19340              161                19179             161             19179
BIG CLIFF DAM               9347               34                 9313              34              9313
BONNEVILLE DAM & LAK      402774             2571               400203            1928            400846
COUGAR DAM                     0                0                    0               0                 0
DETROIT DAM                37400              160                37240             160             37240
DEXTER DAM & LAKE ON        8808               26                 8782              26              8782
GREEN PETER DAM            26469               93                26376              93             26376
HILLS CREEK DAM & LA       10811               52                10759              52             10759
JOHN DAY DAM & LAKE       993730             1573               992157            1101            992629
LOOKOUT POINT DAM &        36943              138                36805             138             36805
MCNARY DAM & LAKE WA      561230             2976               558254             780            560450
THE DALLES DAM & LAK      606455             1160               605295             858            605597
CHIEF JOSEPH DAM & E     1112167              834              1111333             834           1111333
ICE HARBOR DAM            205003             2159               202844             432            204571
LITTLE GOOSE DAM & L      346997              605               346392             363            346634
LOWER MONUMENTAL DAM      287889              440               287449             264            287625
LIBBY DAM & LAKE KOO       66811              584                66227             584             66227
LOST CREEK DAM             36498              247                36251             109             36389
LOWER GRANITE DAM &       335262             1370               333892             548            334714
FOSTER DAM                 10412               75                10337              75             10337
GRAND COULEE DAM         2039947             9133              2030814            9133           2030814
HUNGRY HORSE DAM          115571                0               115571               0            115571
 
 
TOTAL                    7539420            24945              7514475           18227           7521193