S.D. Codified Laws § 10-37-4

Every pipeline company required by law to report to the Department of Revenue under the provisions of this chapter shall, on or before April fifteenth in each year make to the Department of Revenue, a detailed statement showing the amount of real estate owned or used by it on December thirty-first next preceding for pipeline purposes, the county in which said real estate is situated, including the rights-of-way, pumping or station grounds, buildings, storage or tank yards, equipment grounds for any and all purposes, with the estimated actual value thereof, in such manner as may be required by the secretary of revenue.