South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

Significance: The South Fork Trinity River Bridge is one of a very limited number of cantilever truss highway bridges in California. Best suited to specific terrain conditions such as deep canyons to be crossed by a single span, or where use of falsework was impractical, the type enjoyed brief popularity in California during the decade spanning the late 1920s to the late 1930s. With a high degree of integrity, and representing a type, period, and method of construction, the South Fork Trinity River Bridge was determined eligible for inclusion in the National Register of Historic Places on December 9, 1983, meeting Criterion C at the local level of significance.
Survey number: HAER CA-29
Building/structure dates: 1930 Initial Construction