From the record
“The United States Post Office building in Scappoose, Oregon, is the current post office serving the local community and a recognized historic structure. Built in 1966, it is an essentially intact example of the "Thousand Series" facilities built under the direction of the Post Office Department in the late 1950s and the 1960s.”
Wikipedia article United States Post Office (Scappoose, Oregon), CC BY-SA 4.0.
One of 11 National Register listings published here for Columbia County · listed in 2017 · category: Building · built in 1966, modern architecture.
Sources: the Wikipedia article · the National Register database, National Park Service · the Wikipedia article

