MONTHLY POWER PRODUCTION SUMMARY FOR: MAY 1999
 
                    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              176874              477               176397             477            176397
ALBENI FALLS DAM ON        16087              166                15921             166             15921
BIG CLIFF DAM              12650               37                12613              37             12613
BONNEVILLE DAM & LAK      525495             2437               523058            1828            523667
COUGAR DAM                 19666               76                19590              76             19590
DETROIT DAM                55300              184                55116             184             55116
DEXTER DAM & LAKE ON        9919               26                 9893              26              9893
GREEN PETER DAM              269               44                  225              44               225
HILLS CREEK DAM & LA       16984               66                16918              66             16918
JOHN DAY DAM & LAKE      1102090             1537              1100553            1076           1101014
LOOKOUT POINT DAM &        49816              180                49636             180             49636
MCNARY DAM & LAKE WA      565163             2993               562170             780            564383
THE DALLES DAM & LAK      639893             1345               638548             995            638898
CHIEF JOSEPH DAM & E     1267128             1020              1266108            1020           1266108
ICE HARBOR DAM            203387             1946               201441             389            202998
LITTLE GOOSE DAM & L      406421              693               405728             416            406005
LOWER MONUMENTAL DAM      446723              488               446235             293            446430
LIBBY DAM & LAKE KOO       49100              663                48437             663             48437
LOST CREEK DAM             39182              331                38851             146             39036
LOWER GRANITE DAM &       369653             1356               368297             542            369111
FOSTER DAM                 12868              116                12752             116             12752
GRAND COULEE DAM         1879901             7110              1872791            7110           1872791
HUNGRY HORSE DAM           53164                0                53164               0             53164
 
 
TOTAL                    7917733            23291              7894442           16630           7901104