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Special investigations

The Office of Bridges and Structures at the Iowa Department of Transportation is responsible for the design, maintenance and rehabilitation of bridges and other transportation structures on the state highway system. As atypical problems arise that cannot be addressed as part of the typical office planning process, special evaluations are often needed.

Project Documents/Photos/Plans

Monitoring of the Iowa River bridge launching

Investigation of High-mast light pole failure

Investigation of fatigue cracking due to out-of-plane bending

Monitoring of bridge vibration due to high-wind - Saylorville

  • Abstract
  • Photos
  • Presentations and papers
  • Plans, specifications and contract documents
  • Status: in progress

Testing and evaluation of basket handle arch hangers, I-235 pedestrian bridges

Concrete Drilled Shaft Testing, Iowa DOT Project No. 90-00-RB01-010

Drilled shaft load testing, I-235 over UPRR

Monitoring and evaluation of integral abutments supported on steel piling/drilled shaft combination, Ninth Street over I-235

Investigation of bridge mounted light poles vibrations, Burlington bridge

  • Abstract
  • Photos
  • Presentations and papers
  • Plans, specifications and contract documents
  • Status: completed
  • Final report

Investigation of sign-support truss structure

Investigation of collision damaged high-truss bridge, Coppock bridge on Iowa 78

Debris Mitigation Methods for Bridge Piers
Iowa Highway Research Board loog