S.D. Codified Laws § 44-5-4 (2026)
The partial performance of an act secured by a lien does not extinguish the lien upon any part of the property, even if it is divisible.
Source: CivC 1877, § 1720; CL 1887, § 4344; RCivC 1903, § 2040; RC 1919, § 1545; SDC 1939, § 39.0122.