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ITD Finds Innovative New Method to Replace 17 Bridges Idaho Department of Transportation photo
Idaho Department of Transportation photo
In addition to partnering within districts, ITD also worked with JUB Engineers and Strata for the design work and structure testing. Wadsworth Brothers Construction won the contract for the work.
“In the design/bid/build process, usually there is one bridge per project and usually it takes one year to design and get into construction. Just in time alone, we’re saving basically 17 years,” said Megan Stark, ITD spokeswoman.
By Lori Tobias CEG CORRESPONDENT
Idaho Department of Transportation photo
Each of the bridges is being brought up to current design standards, including wider shoulders, and in many cases longer spans.
When the Idaho Transportation Department identified 17 bridges in Eastern Idaho that did not meet current safety and geometry standards, the agency decided to try a new construction approach that ultimately saved taxpayers millions of dollars and more than a decade in time. “Every one of the bridges is 50 years old or older,” said Megan Stark, ITD spokeswoman.
“Usually, we do these district by district, but because they were in close areas, we were able to have the districts come together and work together collectively. It’s a big, big range of districts, all of eastern Idaho. We got the design/build team together and were able to design these 17 bridges within a year. Which is amazing. They were able to get it designed and then have a bid confirmed and basically construction started spring of 2018. The project costs $24.1 million. “The savings in combining the
17 bridges, in construction costs alone, we saved a minimum of $3 million. In the design process, we saved $1.7 million for a total $4.7 million savings. Additionally, in the design/bid/build process, usually there is one bridge per project and usually it takes one year to design and get into construction. Just in time alone, we’re saving basically 17 years. It was quite an interesting process. The only way to really pull this off is if the design on the bridges are the see BRIDGES page 10