SDCL § 46-7-12: Willful damage, destruction, or interference with works prohibited.

No person, for any purposes other than those contemplated by this title, may willfully damage, destroy, or otherwise interfere with any works for the application of water to beneficial use, for the apportionment or measurement of water or for any hydrographic study, nor may any person interfere with any person engaged in the discharge of any duties connected therewith.