Illinois Department of Transportation, Erica Borggren, Acting Secretary
Patrick J. Quinn, Governor
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Welcome to the I-270 Chain of Rocks Canal Bridge Project

drilled shaft
The Illinois Department of Transportation (IDOT) is constructing a new bridge over the Chain of Rocks Canal. The project includes levee construction, bridge construction, bridge demolition, pavement removal, Interstate highway construction on a new alignment and partial interchange reconstruction at IL Route 3. Also there will be drainage improvements, construction of sign structures, box culvert construction, and new highway lighting. It should also be noted that this contract has an executed “Project Labor Agreement”.

The project is located at the crossing of Interstate 270 over the Chain of Rocks Canal and over the Chain of Rocks Levee, near Granite City. This $104 million project was on the June 17, 2011 letting. Construction began on October 31, 2011 and the project is estimated to be completed by late fall 2014.. In addition, the new bridge is to be opened to traffic by December 1, 2013.

Chain of Rocks Bridge
west abutment The Chain of Rocks Canal serves as the navigable channel for all Mississippi River barge traffic passing through St. Louis, and I-270 is one of the major St. Louis commuter links between Illinois and Missouri, with an ADT of 54,700 in 2007. The existing twin truss bridges also carry I-270 over the Chain of Rocks Levee which parallels the canal and is owned and operated by the US Army Corps of Engineers (USACE).

This site will be updated periodically as the project progresses. The Illinois Department of Transportation (IDOT) wishes to thank you for your support and patience.

Chain of Rocks Bridge
09-21-2012 UPDATE: Walsh Construction Company is approximately 30% complete with the contract at this time. The IL Rte 3 SB to I-270 WB and I-270 EB to IL Rte 3 SB ramps have been relocated and are now in operation. The east Chain of Rocks Levee has been relocated with final seeding to commence soon. The MSE wall along the ramp from IL Rte 3S B to I-270 WB is complete. All soil embankment, new median inlets, and storm sewer for the new alignment are in place. Degrading of the existing highway alignment and final storm sewer connectors will take place once traffic is removed from the existing alignment. Construction of the west bridge abutment is complete and construction of the east bridge abutment is in progress. The Pier Cofferdam construction at the west side of the canal is complete and the Pier Cofferdam construction at the east side of the canal is in progress. Pier 1 (near the west bridge abutment) drilled shafts are complete and excavation of the pier 2 drilled shafts (west side of canal cofferdam) are in progress. Steel Plate girders for the new structure are currently being shipped from the fabricator to the local storage yards.

07-24-2012 UPDATE: The contractor is continuing to construct the west as well as the east earth embankments. I-270 eastbound traffic on Chouteau Island has been shifted to the south onto temporary pavement to facilitate construction of the new bridge approach pavement. The majority of the concrete has been placed for the west abutment, and construction of the piers 1-3 has commenced via the excavation of drilled shafts at pier 1 and cofferdam construction at piers 2 & 3. The construction of the retaining wall along the IL 3 ramp to I-270 westbound is approximately 33% complete and final grading and paving of the relocated IL 3 ramps is underway. The contractor has commenced delivery of the new structure’s girders to local storage locations. The contract is approximately 15% complete.

Construction Progress

Contract Information

Letting Date: June 17, 2011
Award Date: July 19, 2011
Execution Date: August 1, 2011
Start Date: October 31, 2011
DBE Subcontractors goal: 25%

Project Cost Construction= $104 million
Prime Design Consultant HDR Engineering, Inc., Chicago, IL
Prime Contractor Walsh Construction Company, Chicago, IL
Phase III Consultant Crawford, Murphy & Tilley, Springfield, IL

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