I-Street Bridge Replacement
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Overview

The I-Street Bridge is a historic through truss swing bridge carrying I Street over the Sacramento River in Sacramento, CA. It connects Sacramento with West Sacramento. Originally constructed in 1911, the bridge is 900 feet long with a 330-foot main swing span. The bridge carries highway access on the upper deck and railway access on the lower deck.

This project will include the construction of a new bridge upstream of the existing bridge. As a subconsultant to Mark Thomas, M&M was selected to design the movable span of the new I Street Bridge. Our portion of the design includes all structural, mechanical, and electrical design of the main span. Initial project tasks included a conceptual study and permitting. The project is currently in the preliminary and final design phase.

The new structure will accommodate highway traffic, bicycle lanes, pedestrian sidewalks, and accommodate a future street car. The project is expected to cost approximately $220 million. Final design for the project will be selected in 2020, with construction targeted to begin in 2021.

For more information, please visit the City of Sacramento's I Street Bridge Project page: http://www.cityofsacramento.org/public-works/engineering-services/projects/current-projects/i-street-bridge-replacement 

Renderings courtesy of project architect TY Lin 

Bridge Geometry
Length of Main Span 330 Feet
Total Project Length 900 Feet
Lanes on Structure Three Lanes, Street Car, Bicycle Lanes, and Sidewalks

The new bridge will be fully modern, beautiful, iconic structure that will really activate the waterfront and also make it easy to get around…

-Christopher Cabaldon, W. Sacramento Mayor