DelDOT Program to Replace Corrugated Metal Pipes with RCP Alternative
By Jason Hastings, Bridge Design Engineer
Delaware Department of Transportation
Since the early 2000s, the Delaware Department of Transportation (DelDOT) has been focused on replacing aging and corroding corrugated metal pipe culverts throughout the state. DelDOT defines a state-length bridge as a structure with a hydraulic opening greater than 20 square feet. The federal definition of a bridge is a structure over 20 feet in length measured along the centerline of the roadway. Delaware’s bridge inventory consists of over 1,600 federal and state-length bridges. Approximately 50% are culverts.
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