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Designs to Replace 108-Year-Old Bridge

Monday, April 8, 2019

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Concept renderings of the replacement I Street Bridge in Sacramento, California, have been released by San Francisco-based architectural firm, T.Y. Lin International.

T.Y. Lin had previously won the design competition for the planned structure.

About I Street

The historic steel truss, double-deck swing bridge was built in 1911, making it 108 years old, the oldest of the remaining swing bridges on California highways. The structure has one main span and three approach spans, with the length of the main span reaching 195 feet. The total length of the structure stretches 854 feet.

Michael Hicks, CC-BY-2.0, via Wikimedia Commons

Concept renderings of the replacement I Street Bridge in Sacramento, California, have been released by San Francisco-based architectural firm, T.Y. Lin International.

Designed by John D. Isaacs for the Southern Pacific Railroad, the bridge carries railroad traffic on the lower deck and vehicular traffic on the top. The American Bridge Company (New York) built the superstructure, with help from Missouri Valley Bridge & Iron Co. (Leavenworth, Kansas) constructing the substructure.

The bridge received rehabilitation services in 1937 when a new east approach was constructed, and in 1959, when a west approach was built. The bridge was nominated in 1981 to be listed on the National Register of Historic Places, and was later approved.

In 2013, federal funding was announced for the replacement of I Street with a new vehicular bridge.

What’s Happening Now

With plans to be built just a few hundred yards upstream of the historic bridge, the new structure plans to have 12-foot-wide sidewalks, 8-foot-wide bike lanes and even enough space for a trolley car.

As for the old bridge, West Sacramento still plans to use the structure for train traffic. However, motor vehicles will no longer be able to move across the top. Redesign efforts for this portion of the project show the future demolition of on and off ramps and the rehabilitation of what will be a pedestrian and bicycle upper deck conversion.

Local officials want the new structure to be a “signature bridge” and plans to have the public play a huge role by including their input for the choosing a final design.

With a price tag of $170 million to begin the construction, campaigns for funding will be acquired from federal and state resources in addition to contributions from the local government.


Tagged categories: Accelerated Bridge Construction (ABC); Bridges; Bridges; Construction; Historic Preservation; Historic Structures; Infrastructure; Infrastructure; NA; North America; Program/Project Management; Rail; Roads/Highways; Upcoming projects

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