it was extended east to SC 310 in Vance. In 1953, it was extended completely back to SC 6. In 1962-1964, the entire route was renumbered as SC 210. The third, and current, SC 121 was established in 1962-1964, which formed a three-state route (continues south as Georgia State Route 121 and Florida State Road 121 to Lebanon Station, Florida). From North Augusta to Rock Hill, it was placed on concurrencies with various highways throughout the state; with exception around Whitmire, where it replaced part of SC 19. Its routing has remained unchanged since inception. Major intersections Special routes Chester business loop SC 121 Business (SC 121 Bus.) was established in 1964 to run concurrently with SC 72 Bus.; through downtown Chester, via West End Street, Main Street and Saluda Street/Road. It was never part of mainline SC 121, as it bypassed Chester to the south and east with SC 72. It is unknown when the business loop was decommissioned. See also References External links Mapmikey's South Carolina Highways Page: SC 121 Mapmikey's South Carolina Highways Page: Former SC 121 Business 121 Transportation in York County, South Carolina Transportation in Chester County, South Carolina Transportation in Union County, South Carolina Transportation in Newberry County, South Carolina Transportation in Saluda County, South Carolina Transportation in Edgefield County, South Carolina Transportation in Aiken County, South Carolina