Whenever, upon complaint and after hearing had, the office finds that public convenience and necessity require the use by one or more railroads of the tracks, wires, poles, rights-of-way, switches, bridges or other property belonging to another railroad over or on any street, railroad, railway, right-of-way, bridge or viaduct, upon or over which said railroads have a right to operate, and that such use will not prevent the owners or other users thereof from performing their public duties, nor result in irreparable injury to such owners or other users thereof, the office may, by order, direct that such use be permitted, and prescribe a reasonable compensation and reasonable terms and conditions for such joint use.