From the record
“Warren Guard Station, Building 1206 was built in 1934. It was designed by architects of the United States Forest Service and was built by the Civilian Conservation Corps.”
Wikipedia article Warren Guard Station, Building 1206, CC BY-SA 4.0.
One of 42 National Register listings published here for Idaho County · listed in 1994 · category: Building · built in 1934, by architects of the United States Forest Service.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article