SDCL § 9-45-10: Vacation after nonuser of platted street or alley--Petition of property owners.

In any first or second class municipality whenever any street or alley or any part thereof as designated upon any recorded plat of the same shall not have been used or traveled as a street or alley at any time during the period of twenty years subsequent to the recording of the plat, the same may be vacated by the governing body upon application of the owner or owners of all the real property abutting upon both sides thereof. The application for such vacation shall be made upon the petition of the abutting owner or owners and shall be verified by the affidavit of such owner or owners or his or their agent or attorney.