Before the department enters into any contract for the purchase of any bridge, under the provisions of §§ 31-10-2 to 31-10-11, inclusive, an appraisal shall be made of the bridge and its approaches, or the portion of the bridge and approach thereto situate in this state. No contract may be entered into or any money used for such purchase exceeding the appraised value of that portion of the bridge situate within the State of South Dakota.
SDCL 31-10-11