The aim of surfacing an excavation within the street is to obtain a surface level with the remaining area of the street which will not settle. This surfacing shall be done immediately upon the completion of the backfill as follows:
(a) Concrete, Asphalt, Brick, Macadam Pavements. The cut in the existing pavement shall be extended nine inches around the entire perimeter to subbase level to provide a shoulder on which the concrete slab base shall rest. This base shall be of 1:2:4, 6 bag mix, Portland cement concrete using high early strength cement and it must be cured at least forty-eight hours. If the width of the trench is greater than three feet at the subbase level, it shall be reinforced with No. 6 wire mat or five-eighths inch deformed bars spaced both ways eighteen inches on centers. The thickness of and the surface courses for the different-type pavements shall be as follows:
(1) Concrete: Ten-inch base and surface monolithic.
(2) Asphalt base: Eight inch concrete base with State Specification 404 surface two inches thick after compaction.
(3) Brick: Eight-inch concrete base with brick surface matching original.
(4) Macadam: Same as asphalt.
Before placing the surface course of 404 on the concrete base, a tack-coat of emulsion shall be applied to the concrete and the vertical sides of the existing asphaltic concrete. After the cut is filled and rolled, a seal six inches wide of the same emulsion as used above shall be applied around the perimeter of such cut. In old asphalt, brick or macadam pavements, repair may be of concrete ten inches thick upon written approval by the City Engineer. If weather conditions do not permit the placing of concrete, a temporary repair may be made by bringing the backfill to a point two inches below the surface and placing a two-inch surface course of State Specification 405. Any loss of this material shall be immediately replaced. As soon as weather conditions permit, this temporary repair shall be dug out and the pavement replacement made as specified above.
(b) Double Seal Treated and Oiled Surface Streets. Repair shall be made immediately after the backfill is completed with State Specification 404 two inches, compacted, in thickness.
(c) Area Back of Curb. All concrete, brick or flagstone walks removed shall be replaced with concrete, four inches thick, to the original width. No partial blocks or patching shall be permitted. All concrete or brick drives removed shall be replaced with concrete six inches thick and a six-inch shoulder on the sides. All asphalt drives removed shall be replaced with asphalt six inches thick laid in two three-inch layers and with a six-inch shoulder on the sides.
(Ord. 215-1993. Passed 2-22-94.)