MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 1991
 
                    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              273151              438               272713             438            272713
ALBENI FALLS DAM ON         7937              165                 7772             165              7772
BIG CLIFF DAM              10107               45                10062              45             10062
BONNEVILLE DAM & LAK      454433             2654               451779            1990            452442
COUGAR DAM                 17732               69                17663              69             17663
DETROIT DAM                39350              199                39151             199             39151
DEXTER DAM & LAKE ON        7753               20                 7733              20              7733
GREEN PETER DAM            25791               95                25696              95             25696
HILLS CREEK DAM & LA       19124               45                19079              45             19079
JOHN DAY DAM & LAKE      1282780             1475              1281305            1032           1281748
LOOKOUT POINT DAM &        44033              115                43918             115             43918
MCNARY DAM & LAKE WA      692976             3206               689770             780            692196
THE DALLES DAM & LAK      924104             1404               922700            1039            923065
CHIEF JOSEPH DAM & E     1380153              995              1379158             995           1379158
ICE HARBOR DAM            315470             1967               313503             393            315077
LITTLE GOOSE DAM & L      406287              548               405739             329            405958
LOWER MONUMENTAL DAM      263342              505               262837             303            263039
LIBBY DAM & LAKE KOO      108809              543               108266             543            108266
LOST CREEK DAM             36304              ---                  ---             ---               ---
LOWER GRANITE DAM &       430814             1212               429602             485            430329
FOSTER DAM                 11808              120                11688             120             11688
GRAND COULEE DAM         2221350             8676              2212674            8676           2212674
HUNGRY HORSE DAM           70402              ---                  ---             ---               ---
 
 
TOTAL                    9044010            24496              8912808           17877           8919427