The permit holder shall comply with the following specifications for restoration of the disturbed area:
(a) Excavation. In any street opening the width of the bottom of the excavation shall be less than the width of the opening at the surface. In the event the sides of the opening cave-in during the excavation, and such an opening is in a paved street, the pavement shall be removed to conform to the size of the caved-in-area.
(b) Backfilling. The excavated material shall be removed from the site and the excavation shall be backfilled with a bank run gravel which shall meet the State Department of Transportation Construction and Material Specifications. Each layer shall be thoroughly compacted by approved power tamping equipment.
For street openings, the backfill shall be brought to within eight inches of the street surface or all types of pavement when either Portland cement concrete or asphaltic concrete is used for a base. When an aggregate base is used, the excavation shall be backfilled to within ten inches of the street surface.
(c) Pavement Restoration. The pavement in the disturbed area shall be completely restored not later than one day after backfilling is complete except as otherwise provided herein.
(1) The restoration of asphaltic pavements shall consist of a base and a surface course.
(2) The base shall be either bituminous aggregate base (Specification #301), asphalt concrete (Specification #301), aggregate base (Specification #304), or Portland cement concrete (Specification #305). All base courses will be six inches in depth, except for aggregate base which will be eight inches in depth. The time specified for complete restoration shall be extended three days when Portland cement concrete base is used to allow for curing. The surface course shall consist of asphalt concrete (Specification #404) compacted to a depth of two inches. The surface of the base course and the walls of the adjacent pavement shall be covered with a bituminous tack coat before the surface course is placed.
(3) The restoration of Portland cement concrete pavements shall consist of a two inch aggregate base (Specification #304) under a six inch course of Portland cement concrete (Specification #452) screeded flush with the adjacent pavement surface and broomed for a rough, skid-resistant surface.
(4) In case the weather does not permit permanent restoration, a temporary restoration adequate for carrying traffic may be approved by the Mayor. The Mayor will establish the specifications for the temporary restoration work in accordance with the existing conditions.
(Ord. 611. Passed 4-2-84.)