SAN FRANCISCO BAY AREA, CA — A recently released analysis of the most "structurally deficient U.S. bridges in poor condition" reveals California is home to 1,493 of these crossings. Among the most traveled of those bridges, 15 are in the Bay Area.
Each bridge logs between 180,000 and 200,000 daily trips. The bridges are in Contra Costa, Alameda, Solano and San Mateo counties.
The information is contained in a new report from a road contractors' lobbying group that lists 43,578 bridges across the country that are structurally deficient and in danger of collapsing.
The report is from the American Road and Transportation Builders Association and is based on data downloaded Jan. 3.
A bridge is classified as structurally deficient if the deck, superstructure or substructure are in poor condition, or if the culvert below it is in poor condition, according to government definitions.
The Interstate 680 corridor through Contra Costa County has eight of the 15 Bay Area bridges, carrying a minimum of 181,700 vehicles a day. Seven of the bridges are over 50 years old, with the remaining bridge approaching 30 years old.
https://patch.com/california/walnutcreek/plagued-aging-infrastructure-worst-busy-bridges-bay-area