Idaho Code § 40-2322

If any person owning or having ditches across any public highway, fails or neglects to build bridges or culverts over them as required, or to keep them, or the public highway in good repair, it is the duty of the director of highways of the county or district to build or repair them at the expense of that person, and the cost of them is a lien upon the land and premises of the ditch owner, and may be sued for and collected, by and in the name of the director of highways, in any court of competent jurisdiction.