S.C. Code § 58-17-3420
Every railroad corporation shall, at its own expense, construct, and afterwards maintain and keep in repair, all bridges, with their approaches or abutments, which it is authorized or required to construct over or under any turnpike road, canal, highway or other way and any city or town may recover of the railroad corporation whose road crosses a highway or town way therein all damages, charges and expenses incurred by such city or town by reason of the neglect or refusal of the corporation to erect or keep in repair all structures required or necessary at such crossing. But if, after the laying out and making of a railroad, the governing body of a county has authorized a turnpike, highway or other way to be laid out across the railroad, all expenses of and incident to constructing and maintaining the turnpike or way at such crossing shall be borne by the turnpike corporation or the county, city, town or other owner of it.
S.C. Code § 58-17-3420