SDCL § 9-36-10: Improvement of stream boundaries--Land acquisition outside boundaries.

Any municipality having established the boundary lines of any river or stream as provided in §§ 9-36-2 to 9-36-7, inclusive, is authorized to improve the same by retaining walls, walks, and driveways, and if it is necessary for said purpose to include lands outside the boundary lines of said river or stream as established, it may acquire said lands or a perpetual easement therein for public use by purchase or condemnation.