S.D. Codified Laws § 1-44-31
There is hereby created a special fund in the state treasury known as the railroads administration fund. All rentals, fees, charges, and income received through the management of railroad property, both real and personal, shall be paid into the railroads administration fund. To the extent possible, expenditures for administration and maintenance of railroad property, including, but not limited to, funds sufficient to staff, administer, equip, and maintain the records of state-owned railroad property and facilities and to provide for weed control, fences, security, railroad crossing, and safety warning signs on state railroad property, not otherwise provided for, shall be paid from funds on deposit in the railroads administration fund.
SDCL 1-44-31