Poles, wires, gas mains, pipe lines and other appurtenances of public service companies shall be located or erected over, upon or under the streets, alleys and common grounds after a proper application shall have been made to the City Clerk in writing, and permission in writing shall have been given by the City Council. Public service companies heretofore or hereafter granted right-of-way for the erection and maintenance of poles, conduits, gas mains, pipe lines and wires for the purpose of transacting their business upon, under or over the streets, alleys and public grounds shall at all times, when requested by the City Council, erect, locate or relocate their poles, wires, gas mains, pipe lines and other appurtenances, to such places and in such manner as shall be designated by the City Council. Such poles, wires, gas mains, pipe lines and other appurtenances, shall be removed or relocated by said companies at their own expense when requested to do so by the City Council. Whenever it becomes necessary for the City Council to request such relocation for the public safety and convenience, the City Council shall order said relocation by resolution, and the City Clerk shall notify any company or companies affected. Said companies shall, within 24 hours after receiving notice, at their own expense, cause the poles, wires, gas mains, pipelines or other appurtenances to be removed. The City Council shall designate another location, as close as possible, where said poles, wires, gas mains, pipelines or other appurtenances may be reset or placed. All poles, wires, gas mains, pipelines or other appurtenances, shall be reset, placed or erected in such manner that they will not interfere with the water system, sewer system or poles, wires and mains of any public utility located on the same street or alley, or with travel, buildings constructed or hereafter to be constructed. Whenever possible, all pole lines, wires, gas mains, pipelines or appurtenances shall be confined to the alleys of the city. No water pipe, underground electric line or telephone conduit shall be laid in the same trench with sewer pipe in any street, alley or public grounds in the city, or nearer than three feet to any sewer pipe. No underground electric line shall be laid in the same trench with any water pipe, sewer pipe or telephone conduit in any street, alley or public grounds or nearer than three feet to any such pipes or conduit.