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I-80/I-35 over Walnut Creek

Learn about the I-80/I-35 over Walnut Creek bridge replacement project in Iowa, including the existing bridge, proposed staging, and objectives. Join the Iowa ABC Workshop to discuss accelerated construction methods and replacement options.

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I-80/I-35 over Walnut Creek

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  1. I-80/I-35 over Walnut Creek Norm McDonald, P.E. Iowa Department of Transportation Project Overview Iowa ABC Workshop, August 11-12, 2008 Des Moines, Iowa

  2. I-80 over Walnut Creek

  3. I-80/I-35 over Walnut Creek Project Description • Existing bridge: 408’-6 x variable continuous steel I-beam (57’-3 end spans and 4@73’-6 interior spans) • Built in 1958 and widened twice in 1980s • Three EB/NB lanes plus exit ramp • Original deck (center lanes) is in need of replacement

  4. I-80 over Walnut Creek Proposed Staging Stage I

  5. I-80 over Walnut Creek Proposed Staging Stage II (Day Time)

  6. I-80 over Walnut Creek Proposed Staging Stage II (Night Time)

  7. I-80 over Walnut Creek Session Objectives • Identify accelerated construction methods to replace the original deck (center lanes) • Maintain three traffic lanes during peak hours • Evaluate replacement options: deck vs. superstructure • Existing shear connectors present a fatigue concern and may slow deck removal • Evaluate deck options: precast vs. cast-in-place

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