Large culvert rehabilitation project saves money and maintains traffic flowProblem: An annual inspection in Grottoes, Virginia, uncovered serious problems with the town’s stormwater system. A large set of elliptical CMP culverts did not pass inspection. There was severe corrosion, and individual sections were failing and misaligned. The town’s consultants recommended replacement. Complicating the issue, the failing pipes were four parallel culverts that were all quite large — 70 by 44 inches — running directly underneath Dogwood Avenue, one of Grottoes’ two main thoroughfares.Solution: The town initially obtained cost estimates for replacing the culverts. The price was high and the plan
