Modjeski and Masters Member of Benesch Team
Recently Chosen for Final Design
of the I-74 Bridge Over the Mississippi River

Modjeski and Masters is a member of the Alfred Benesch Team which was recently selected for the final design of the I-74 Bridge over the Mississippi River.  Modjeski and Masters primary responsibility will be the design of the approximately 800-foot dual true arch main spans over the Mississippi River. This will be the seventeenth Mississippi River crossing designed by our firm.

This project is part of the larger I-74 corridor project in the Quad Cities, approximately seven miles in length, crossing the Mississippi River between Bettendorf, Iowa and Moline Illinois.  It is a combined effort of both the Iowa Department of Transportation and Illinois Department of Transportation. An extensive Bridge Type Study was performed to select the preferred navigation span structure, a basket handle true arch bridge.

Final design will include: preparation of contract plans with aesthetic components and specifications,  maintenance traveler, suggested erection procedure, load rating, ship impact study, inspection platforms, maintenance waterline, minor hydraulic and scour analysis, independent structural review, and wind tunnel testing. 

For more information, visit the project website at www.I74corridorstudy.org

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