From the record
“The Fremont Powerhouse is a power plant located in the Umatilla National Forest in Grant County, west of Granite, Oregon, United States.”
Wikipedia article Fremont Powerhouse, CC BY-SA 4.0.
One of 9 National Register listings published here for Grant County · listed in 1983 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service