Innovative Contracting Project to Accelerate Replacement of Multi-County Bridges in Iowa

September 17, 2020 1:00 pm

Ahmad Abu-Hawash, P.E., Chief Structural Engineer, Iowa Department of Transportation; Phil Rossbach, P.E., Vice President, HDR Engineering, Inc.; Brian P. Moore, P.E., Secondary Roads Research Engineer, Iowa County Engineers Association Service Bureau; and Q&A panel member Vanessa Goetz, P.E., IHRB/STIC Executive Secretary, Research and Analytics Bureau, Iowa DOT

Webinar Recording

Webinar Documents:
Innovative Contracting Project to Accelerate Replacement of Multi-County Bridges in Iowa - pdf of presentation

See also October 2019 Monthly Webinar Archives on Bridge Bundling Guidebook

Q&A Session – pdf (to be posted soon!)

News - September 17, 2020 - pdf of presentation

Description: A collaboration between the Iowa DOT, the Iowa Highway Research Board, and Iowa counties is delivering the accelerated replacement of eight deteriorated local government bridges in seven counties under an overarching materials-only bridge bundling project. The innovative contracting project supplies materials, including adjacent box beams and ultra-high-performance concrete (UHPC) for deck closure joints, to counties. The counties then use their standard letting processes to award their individual projects to local contractors. The prefabricated bridge elements and standard designs streamline development and construction time. Awarded in April 2019, the project received an Accelerated Innovation Deployment (AID) grant of $1 million with $250,000 city/county/state match. Six of the local projects have been awarded, with five bridges completed with construction in 2020 and the remaining three bridges to be completed in 2021. This presentation discusses development of the ABC superstructure and substructure standards, identification of candidate bridges, the project development process, team composition, the AID grant, industry collaboration and constructability reviews, letting, cost, construction activities, and lessons learned.

Presentation Photos/Graphics:

1) Locations of 8 local bridge projects

2) Short span standards, perspective view

3) Beam setting – Center J35-1 Bridge, Monona County

4) Joint pour – Center J35-1 Bridge, Monona County

5) Joints prior to grinding – Center J35-1 Bridge, Monona County

6) Finished bridge – Center J35-1 Bridge, Monona County