SDDOT Bridge Inspections
Interstate Engineering has conducted bridge inspections on existing bridges and culverts for counties, cities, and other government agencies. These inspections use the National Highway Institutes Criteria for Bridge Inspections. Interstate Engineering has Certified Bridge Inspectors for bridges and culverts. In South Dakota, Interstate Engineering has completed bridge/culvert inspections for eight different counties and 12 municipalities. Some of the larger counties include Pennington County (134 structures), Butte County (94 structures), and Lawrence County (41 structures).