S.D. Codified Laws § 31-19-41.1
Current with legislation signed by the governor on or before 3/6/2024
A county or first or second class municipality acquiring right-of-way for a highway or street improvement with federal-aid funds shall offer to acquire any remaining property remnant if the acquisition of only part of the property would leave its owner with an uneconomic remnant.
SDCL 31-19-41.1