From the record
“The Siuslaw River Bridge is a bascule bridge that spans the Siuslaw River on U.S. It was designed by Conde McCullough, built by the Mercer-Fraser Company of Eureka, California, and funded by the Federal Emergency Administration of Public Works.”
Wikipedia article Siuslaw River Bridge, CC BY-SA 4.0.
One of 123 National Register listings published here for Lane County · listed in 2005 · category: Structure · built in 1936, by Conde Balcom McCullough.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service


