1976
Modjeski and Masters Tasked with Designing a Replacement Napa River Bridge
Modjeski and Masters was tasked by the Southern Pacific Transportation Company to design a replacement structure to their existing railroad swing span bridge. A new bridge featuring a 288-Foot lift span was selected.
1977
Construction Begins on New Napa River Bridge Substructure
Construction commences on the new Napa River Bridge substructure on an alignment just South of the existing trestle. Shown here is construction progress on the new approach trestle as of November 1977.
1978
Construction Begins on New Napa River Bridge Superstructure
Work starts on the new lift span at an adjacent project site. Superstructure construction would begin for the lift span towers and approach trestle. Shown here is the float-out operation for the old swing span and the float-in of the new lift span. This was completed on June 6, 1979.
1979
The New Napa River Bridge is Completed
The new Napa River Bridge is completed and open to rail traffic on October 20, 1979. The structure continues to serve the client (now Union Pacific) well to this day.