CA-4 (California Delta Highway, Marengo Road) Over Old River in Rural: Contra Costa County, California and San Joaquin County, California, United States
Metal Rivet-Connected Pratt Through Truss, Movable: Swing (Center Pier) and Approach Spans: Metal 6 Panel Rivet-Connected Pratt Through Truss, Fixed
Length: 528 ft.
Main Span: 132 ft.
Roadway: 19.4 ft.
Main Spans: 1
Built 1915
By: American Bridge Company of New York, New York
Special Bridge Conditions Legend:R - Former location of relocated bridge. ! - At risk for demolition or destruction.
X - Confirmed demolished or
collapsed. S
- Dismantled and/or in storage. L -
Severe loss of historic integrity due to alteration.