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New bridge
2:17 pm
Wed December 29, 2010

Miss. River Bridge gets back on schedule

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Credit (Rachel Lippmann, St. Louis Public Radio)
The site of the new Mississippi River Bridge at the foot of Mullanphy St. in north St. Louis.
Credit (Rachel Lippmann, St. Louis Public Radio)
MoDOT project manager Greg Horn
Credit (Rachel Lippmann, St. Louis Public Radio)
A sample taken to test the bedrock at the site. Ultimately, crews drilled 12 shafts (six for each pier) through 30 feet of water, 70 feet of mud, and 20 feet into bedrock.
Credit (Rachel Lippmann, St. Louis Public Radio)
The steel structure called a coffer dam keeps the water out while crews work on the piers.
Credit (Rachel Lippmann, St. Louis Public Radio)
Crews will eventually fill this entire structure with concrete. They've already poured 3,000 cubic yards to seal off the coffer dam.
Credit (Rachel Lippmann, St. Louis Public Radio)
Each of these pieces of rebar sunk into the six shafts is 2.25 inches thick. Compared to bridges of similar size, the MRB will be much heavier to withstand potential earthquakes.
Credit (Rachel Lippmann, St. Louis Public Radio)
MoDOT crews counted 13 cranes working on projects on the Missouri and Illinois sides of the river
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Crews working on the new Mississippi River Bridge have gotten the $640 million project back on track.

Flooding meant that for the months of May, June, and July, it wasn't safe for crews to be working below the water line, says project manager Greg Horn. That wiped out 81 construction days.

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