§ 152.076 WATER, SEWER AND OTHER UNDERGROUND UTILITIES.
   (A)   Underground utilities in streets and easement.
      (1)   All utilities shall be underground in streets and easements. All water and sewer mains are to be located in the paved roadway section far enough from the curb and gutter to allow backhoe access for maintenance without disturbing existing curb and gutter; a minimum of four feet from lip of curb. Utilities other than water and sewer, such as cable television, power, telephone, fiber optics or natural gas, may be permitted behind curbs or sidewalks or between sidewalks and curbs.
      (2)   Utilities within easements must be located to minimize interference with one another, provide required horizontal and vertical separations and provide maintenance accessability without violating easement boundaries.
   (B)   Water and sewer depths and separations. Water lines are to have minimum cover of 36 inches over the top of the barrel and sewer lines are to have a minimum cover of 48 inches over the top of the barrel (or septic tank). In all cases, sewer lines are to be at a depth sufficient to provide gravity service to all adjacent building pads. Service lines are to be laid at grades and depths prescribed by Ch. 52 of this code of ordinances. Vertical and horizontal separations of water and sewer shall conform to the requirements set forth in A.R.S. § 36.
   (C)   Pipe crossing of existing pavement. Crossing of federal, state or county highways will be in accordance with specific requirements of the controlling agency.
(1974 Code, § 14-5-7)