First Street Bridge, Spanning Napa Creek at First Street, between Main Street & Soscol Avenue, Napa, Napa County, CA

Significance: The First Street Bridge over Napa Creek qualified for listing in the National Register of Historic Places under as a distinguished example of its type and period (a bridge from California's pioneering era of bridge construction), and method of construction (stone masonry arch). The First Street Bridge over Napa Creek was the second oldest standing bridge in the city of Napa, and one of the five oldest standing highway structures in California.
Unprocessed Field note material exists for this structure: N978
Survey number: HAER CA-327
Building/structure dates: 1862-1863 Initial Construction
Building/structure dates: 1950 Subsequent Work
Building/structure dates: 2004 Demolished