Where alleys are not provided, easements of not less than eight (8) feet on each side of all rear lot lines and side lines will be required where necessary for poles, wire, conduits, storm or sanitary sewers, gas and water mains and other public utilities. Easement of greater width may be required along property lines where necessary for surface overflow or for the extension of main sewers or similar utilities. (PZSC § 03-28-005 (2) (L))