Crews survey the site of an emergency repair triggered by a culvert failure along Interstate 70 east of Vail, Colo. Costs to replace this culvert totaled $4.2 million. Photo: Colorado DOT

For example, in the “Condition Assessment of Utah Highway Culverts and Determination of Culvert Performance Measures” report commissioned by the Utah DOT, inspections were completed for 272 culverts (40 concrete, 193 metal, 37 thermoplastic). The findings were consistent with other surveys. UDOT culverts are performing well overall with the average rating (6.7) for all culverts and waterways falling in the no-immediate-action-required category. The report showed that there were no significant deviations by geographic location or product material. Specifically, waterway ratings showed 84% of metal, 76% of concrete, and 81% of plastic were in acceptable condition requiring no immediate action. Barrel ratings showed 78% of metal, 89% of concrete, and 73% of plastic were in acceptable condition and required no immediate action.

Dan Edwards, P.E., chief engineer, NCSPA