S.C. Code Ann. § 49-1-40: Obstructing streams generally.

Any person who shall fell, cut or throw or cause to be felled, cut or thrown across or into any of such streams any tree, log or other timber or any trash, brush, debris or obstruction of any kind whatsoever shall be guilty of a misdemeanor and, upon conviction, shall be punished by a fine of not more than fifty dollars or imprisonment for not more than thirty days.