Westbrook Associated Engineers provided engineering services to ICC Group and DemTech (blasting services) for the demolition of Sandy Ford Bridge over the Vermilion River in Lasalle County, Illinois. Sandy Ford, built in 1958, was a 192-foot single-span Pratt through truss with a 50-foot approach span on either side. After 62 years of faithful service, it was decided that the bridge was not fit for use anymore as it was narrow and contained fracture critical members (FCM) that didn’t meet the current bridge standards.
The bridge was closed when demolition began in March of 2021. The deck and approach spans were removed prior to blasting the truss. After blasting, all five fallen truss sections were cut into smaller pieces and removed with a crane. Engineering services provided by Westbrook included calculations to determine blast locations, engineered means and methods for removing deck and approach spans, and calculations showing that the existing bridge could support the necessary equipment for demolition. It was replaced by a 200-foot single-span composite bridge in 2021.