Sweetwater River Bridge, Historic steel bridge in Rancho San Diego, United States.

Sweetwater River Bridge is a riveted steel truss bridge that carried California State Route 94 over the Sweetwater River in San Diego County. Its dark steel lattice of vertical and diagonal beams, joined by riveted plates, forms a rectangular tunnel over a concrete deck, with overhead cross-bracing and side girders. At the right end, blue-painted steel panels sit between dark posts on a concrete base, and a white sign on a metal post reads "HISTORIC SWEETWATER BRIDGE 1929".

The Sweetwater River Bridge was built in 1929 to carry California State Route 94 over the Sweetwater River in San Diego County. The riveted steel truss visible today, with its overhead cross-bracing and blue-painted panels at one end, belongs to that 1929 crossing. A white sign at the roadside marks the span as historic and gives the year 1929.

The bridge carried California State Route 94 over the Sweetwater River from 1929. A white sign at its right end reads "HISTORIC SWEETWATER BRIDGE 1929", marking the structure for drivers passing among the trees and brush.

The bridge carried California State Route 94 over the Sweetwater River in San Diego County. The span appears in the photograph with a white sign on a metal post at its right end reading "HISTORIC" and "SWEETWATE... BRID... 192", so look for that marker when locating it from the highway.

The white sign at the right end of the span reads "HISTORIC SWEETWATER BRIDGE 1929", giving the construction year on the spot. The bridge carried California State Route 94 over the Sweetwater River in San Diego County, and the steel truss with its riveted plates and overhead cross-bracing is what remains of that crossing.