For the purposes of Sections 62.84 to 62.93 inclusive, “Public Utility” shall mean and include the Department of Water and Power of this City, the Department of General Services, Department of Transportation, and any person owning, operating or maintaining overhead light, power, trolley, telephone, telegraph, signal or other wires, street railway tracks or underground structures necessary for public service. (Amended by Ord. No. 152,426, Eff. 6/29/79, Oper. 7/1/79.)