From the record
“The Edisen Fishery is a fishery located in Rock Harbor in the Isle Royale National Park in Michigan. It was designated a Michigan State Historic Site in 1976 and listed on the National Register of Historic Places in 1977.”
Wikipedia article Edisen Fishery, CC BY-SA 4.0.
One of 31 National Register listings published here for Keweenaw County · listed in 1977 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

