From the record
“The Vernonia Pioneer Museum is a history museum, located in Vernonia, Oregon, United States. The building that houses the museum is listed on the National Register of Historic Places as the Oregon-American Lumber Company Mill Office.”
Wikipedia article Vernonia Pioneer Museum, CC BY-SA 4.0.
One of 11 National Register listings published here for Columbia County · listed in 2002 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service