Idaho Code § 18-3907
Any person who obstructs, injures or damages any public road, street or highway, either by placing obstruction therein or by digging in, deepening or deviating the water of any stream, or by placing any obstruction in any ditch or stream within or along any public road, street or highway, or by placing or constructing any obstruction, ditch or embankments upon his own or other lands, so as to make or cause any water to flow upon or impair any public road, street or highway, or rides or drives upon and along the sidewalk of any road, street or highway, whenever such sidewalk has been graded or graveled, located or designated by any order of the board of commissioners or city council, or prepared in any other manner dedicating and designating the same for and to that particular use and purpose, either by the property owner or by the public, or in any other manner injures or obstructs any public road, street or highway, is guilty of a misdemeanor.
Idaho Code § 18-3907