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Jointly-owned Plant
12 Months Ended
Dec. 31, 2020
Jointly-owned Plant [Abstract]  
Jointly-owned Plant [Text Block] JOINTLY-OWNED PLANT
As of December 31, 2020, PGE had the following investments in jointly-owned plant (dollars in millions):
 PGE
Share
In-service DatePlant
In-service
Accumulated
Depreciation*
Construction
Work In
Progress
Colstrip20.00 %1986$566 $387 $
Pelton/Round Butte66.67 %1958/1964283 82 
Total$849 $469 $14 
*    Excludes AROs and accumulated asset retirement removal costs.

Under the respective joint operating agreements for the generating facilities, each participating owner is responsible for financing its share of capital and operating expenses. PGE’s proportionate share of direct operating and maintenance expenses of the facilities is included in the corresponding operating and maintenance expense categories in the consolidated statements of income.

The Company operated, and continues to have a 90% ownership interest in, Boardman, which ceased coal-fired operations during the fourth quarter of 2020. The Company has begun the initial steps toward decommissioning the
facility. As of December 31, 2020, PGE’s ARO liability for its 90% share of the decommissioning costs was $44 million.