The following are not mandatory locations, but, rather, are recommended locations, for underground utilities. Above-ground utilities should be located in the rear lot utility easements. Whenever possible, public utilities shall be located within the limits of a proposed right of-way as follows:
(a) Sanitary Sewers. In the parklawn or under the sidewalk, on the south or east side of the street.
(b) Storm Sewers. In the parklawn, on the north or west side of the street.
(c) Water Lines. Under the sidewalk, on the north or west side of the street, with a minimum four and one-half foot cover.
(d) Gas Lines. Under the sidewalk or in the parklawn, on the south or east side of the street.
(e) Electric Telephone and Cable Television Lines. In rear and side lot easements.