Halfway point for West Mission Bay Drive bridge replacement project
by DAVE SCHWAB
Published - 07/16/20 - 11:30 AM | 6557 views | 0 0 comments | 61 61 recommendations | email to a friend | print
Artist’s rendering of the completed West Mission Bay Drive bridge.
Artist’s rendering of the completed West Mission Bay Drive bridge.
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Work continues at about the midway point of the West Mission Bay Drive Bridge Project to replace the existing 4-lane bridge with a 6-lane bridge having a northbound and a southbound Class I bike facility and pedestrian sidewalks.

The project includes a bike path on both bridges, and roadway widening and improvements along Sports Arena Boulevard, West Mission Bay Drive and the westbound I-8 off-ramp.

Construction on the infrastructure improvement project began in summer 2018. It is expected to be completed in mid-2022. The estimated total cost of the project is $149 million with an estimated construction contract cost of $111 million.

The duration of the project, being performed by contractor Flatiron West Inc., is 57 months. The project is fully funded through the Federal Highway Administration Highway Bridge Program.

West Mission Bay Drive Bridge was constructed in the early 1950s to meet the demands and standards of its time. It was constructed with four travel lanes, five-foot-wide sidewalks, concrete pier walls on timber piles, and a concrete median barrier.

Because the daily traffic volume on the bridge now exceeds its current capacity, the California Department of Transportation evaluated and classified the bridge as functionally obsolete. The existing bridge will be replaced with two three-lane parallel structures for both northbound and southbound traffic.

At present, utility work continues around the northbound structure as crews finish the final portion of soffit (bridge underside) and stem work for the superstructure. In the coming months, the top deck portions of the structure will be poured, creating the final riding surface for vehicle and pedestrian traffic, once the bridge is opened.  

Recently, work crews poured the final stem and soffit concrete on the south portion of the northbound bridge structure. This activity, marks the largest concrete pour thus far, using approximately 1,450 cubic yards of concrete (145 truckloads) and two concrete pump trucks to optimize work efficiency.

Concrete pump trucks provide the means for the concrete to be placed in the bridge structure as the pumps are supplied with concrete from multiple trucks, each delivering 10 cubic yards of concrete. Once the concrete is placed and forms removed, a curing compound is applied, allowing the concrete to continue to cure properly.

For questions or concerns about the project, call the Public Works Department construction project information line at 619-533-4207, email [email protected], or submit your inquiry online. Reference the "West Mission Bay Drive Bridge Replacement Project" in your inquiry.

 

 

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