Idaho Code § 61-514
Whenever the commission, after a hearing had upon its own motion or upon complaint of a public utility affected, shall find that public convenience and necessity require the use by one (1) public utility of the conduits, subways, tracks, wires, poles, pipes or other equipment, or any part thereof, on, over or under any street or highway, and belonging to another public utility, and that such use will not result in irreparable injury to the owner or other users of such conduits, subways, tracks, wires, poles, pipes or other equipment or in any substantial detriment to the service, and that such public utilities have failed to agree upon such use or the terms and conditions or compensation for the same, the commission may by order direct that such use be permitted, and prescribe a reasonable compensation and reasonable terms and conditions for the joint use. If such use be directed, the public utility to whom the use is permitted shall be liable to the owner, or other users of such conduits, subways, tracks, wires, poles, pipes or other equipment for such damage as may result therefrom to the property of such owner or other users thereof.
Idaho Code § 61-514