Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

Significance: The Salt River Bridge, also known as the Valley Flower Bridge, determined eligible for inclusion in the National Register of Historic Places in 1987, represents a major example of the work of a significant designer. When built in 1919, this was recognized as the world's longest reinforced concrete girder bridge, whose 142-foot spans were nearly twice as long as the previous longest concrete bridge girders.
Survey number: HAER CA-126
Building/structure dates: 1919 Initial Construction