A 50-year-old bridge that collapsed in Pittsburgh had been rated as poor on a recent inspection report. But experts say there's low risk of similar collapses in the more than 43,500 bridges rated as poor nationally.
A view of the Fern Hollow Bridge in Pittsburgh that collapsed Friday morning, Jan. 28, 2022. A 50-year-oldin Pittsburgh had been rated as poor on a recent inspection report, but transportation officials and engineering experts cautioned that doesn’t necessarily signal imminent danger for the thousands of other U.S. bridges with the same designation.
Generally, bridges are inspected every two years, with some older or lower-rated bridges inspected more often. “A poor rating doesn’t mean bridges are unsafe, it just means one of those components are rated at that level,” Herrmann said. “It’s a rigorous system, and frankly the federal system is what gives me confidence in the safety of our bridge infrastructure.”New bridges are rated 9, and bridges with minimal or no wear are rated 7 or 8. Bridges considered in what the federal program deems fair or satisfactory condition — some signs of deterioration or minor loss or cracking — are rated 5 or 6.
“When a bridge is added to the queue, it can be years before there’s funding to take care of those repairs, even if it’s added to the top of a state’s queue,” Hajjar said. “The engineers have been working to repair as much as they can. Safety and keeping safe bridges open is the goal, but the struggle is related to the insufficient funding that goes into repairing the aging infrastructure in this country, including bridges.
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