Idaho Code § 62-701

Telephone corporations may construct or install telephone lines along, beneath the surface of or upon any public road or highway, or along, beneath the surface of, or across any of the waters or lands within this state, and may erect or install poles, posts, piers or abutments for supporting the insulators, wires and other necessary fixtures of their lines in such manner and at such points as not to incommode the public use of the road or highway, or interrupt the navigation of the waters.