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Bridge Design Revealed for Sacramento

Tuesday, March 3, 2020

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Last month, city and state officials from Sacramento, California, unveiled the official bridge design a new crossing that will provide connection over the Sacramento Railyards and West Sacramento's Washington neighborhood.

The bridge project will replace the historic I Street bridge.

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.

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.

T.Y. Lin International was later announced at the winning contractor for the design competition for the planned structure. Last year, PaintSquare Daily News reported that the project would cost upward of $170 million to begin the construction, therefore, campaigns for funding would be acquired from federal and state resources in addition to contributions from the local government.

The new structure is slated to be built a few hundred yards up from the original, featuring 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.

What’s Happening Now

During the city’s announcement, State Rep. Doris Matsui (D-Sacramento) pulled the cover from a 3D model of the new bridge structure.

Talking about the design, Matsui stated, “This bridge is our future," adding that the infrastructure would allow for traffic to cross multiple lanes, boats to underpass and incorporates shaded walkways for pedestrians and cyclists.

According to the bridge’s lead architect Noel Shamble, the arches on the bridge are meant to give a “cathedral feel” as drivers cross the river below.

"This strikingly modern design will make the new bridge an instant landmark and an important piece of redesigned waterfront," Sacramento Mayor Darrell Steinberg added.

Officials expect the bridge to be completed in 2023.


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

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