S.C. Code § 4-3-460
Richland County is bounded on the north by Fairfield County, from which it is separated by new boundary lines set forth and specifically described in the location and boundary of Fairfield County; on the east by Kershaw County and Sumter County from which it is separated by the Wateree River; on the south by Calhoun County; on the west by Lexington County, from which it is separated by a line beginning on the Congaree River where the counties of Lexington and Richland meet on the southern division thereof, and running thence with the Congaree River to where the confluence of the Broad and Saluda Rivers unite to form the Congaree, and following the thread of Saluda River about two and one-half miles to a concrete boundary marker; thence in a northwesterly direction upon the circumference of a circle having Lexington courthouse as its center, with a radius of not less than eight miles and a deflection of 1° 21' for every one thousand feet, to a concrete boundary marker on the eastern boundary line of the town of Irmo; thence along the boundary line of the town of Irmo to the northeast corner of the town; thence west along the northern boundary of the town of Irmo 2,260 feet to a stake located thereon; thence along the circumference of the circle first described 11,360 feet to a stake; then N. 42° 30' W. 878 feet; thence west 5,000 feet to a stake; thence S. 85° W. 5,000 feet to a stake; thence S. 80° W. 5,541 feet to a stake; thence N. 37° 28' W. 10,618 feet to a stake; thence S. 85° W. 750 feet to a pine; thence N. 34° 45' W. 10,491 feet to a stake; thence N. 22° E. 914 feet to a stake; thence N. 37° 5' W. 1,313 feet to a stake; thence N. 13° 45' E. 2,597 feet to a stake; thence N. 56° 35' E. 3,920 feet to a point on Rocky Ford on Wateree Creek; thence north, northeast and east along the Wateree Creek to where it empties into Broad River. To the above-described area of Richland County is to be added all that territory transferred from Lexington County by act approved March 11 1922, to wit: all that certain piece of land containing 8,900 acres, or 14 square miles, situate in the northeastern part of Lexington County on the Broad River, and being bounded and delineated as follows, to wit: beginning at a point on the Broad River, and running S. 41° W. 82.51 chains to a stake; thence turning and running S. 32.5° W. 160.65 chains to a stake; thence running along a creek which empties into Wateree Creek 42.24 chains to a stake; thence running to the point where said creek joins Wateree Creek 71.51 chains; thence running along Wateree Creek 94 chains; thence turning and running S. 23° E. 142.50 chains to a point in Slice Creek known as Rocky Ford; thence turning and running northerly along Slice Creek 164 chains; thence turning and running easterly along Wateree Creek 305.00 chains to the point of entrance of Wateree Creek and Broad River; thence turning and running in a northwesterly direction along Broad River 410 chains, said piece of land being bounded on the west by Newberry County, on the south and southwest by Lexington County, on the south by Richland County, and on the east and north by the Broad River, being more particularly known as the plat of said property, completed on November 25 1921, by W.A. Counts and J.C. Wessinger, surveyors, said plat being filed in the office of the Secretary of State.
S.C. Code § 4-3-460