S.D. Codified Laws § 31-25-2
Current with legislation signed by the governor on or before 3/6/2024
Upon application to the Department of Transportation, board of county commissioners, or board of township supervisors, by any person for permission to construct a cattle way across or under any public road, such highway authority maintaining the highway described in the application may in its discretion grant the application upon condition that such way shall be constructed in all particulars as directed by such department or board and shall not interfere with public travel. The grade of the road over the cattle way shall not at any point exceed one foot in ten feet. Applicant must construct and agree to keep the same in repair at his own expense.
SDCL 31-25-2