Cost-Effective Culvert Rehab INFRASTEEL® is a cost-effective way to avoid road damage caused by corrugated metal and concrete culvert failure. It is cheaper to "slip line" a failing culvert than to cut the road and replace it. INFRASTEEL® is competitively priced compared to other slip lining products and culvert repair products. Environmentally Friendly INFRASTEEL® is environmentally friendly. Its steel composition and installation methodologies are benign to the environment. Steel and concrete have been used for many years for road and bridge construction without contamination issues. 50 to 100 Year Life Expectancy The California Department of Transportation (Caltrans) performed destructive testing on all culvert products currently in use on the California road system. Caltrans found that smooth wall carbon steel outperformed all other products in abrasion resistance. The annular space between the INFRASTEEL® liner and the failing culvert structure is pumped with grout, providing another layer of protection. We are confident in our 50 to 100 year life expectancy.