The local S-75/Cherokee Road in Anderson County, SC, crosses over US 29, a major highway that runs from Florida to Maryland. Originally built in 1957, the South Carolina Department of Transportation (SCDOT) identified the bridge as structurally deficient. With low vertical clearance, the bridge did not meet current standards for freight vehicles, causing impacts to safe mobility and potential challenges for commercial growth in the area.
STV provided turnkey services for the bridge replacement and highway improvements, including traffic analysis and alternative concept analysis during the initial phase; roadway and bridge design, drainage, environmental permitting and utility coordination during design; and construction phase services. The project earned an engineering excellence award from the American Council of Engineering Companies of South Carolina.
The final design features a new, single-span bridge, upgraded exit and entrances ramps from US 29 to S-75, mechanically stabilized earth walls and a roundabout at an adjacent intersection. Less common in rural areas, the roundabout design reduced impacts to nearby wetlands and right-of way, while offering a more economical and safe solution that reduces traffic congestion.
