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 Specification No. 703.04. The backfill over twelve inches above the top of the structure shall be placed in horizontal layers not exceeding twelve inches in depth before compaction. Each layer shall be thoroughly compacted by approved power tamping equipment or backhoe. For street openings, the backfill shall be brought to within eight inches of the street surface for 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) Asphaltic pavements. The restoration of asphaltic pavements shall consist of a base and a surface course. The base shall be either: bituminous aggregate base, Specification No. 301; aggregate base, Specification No. 304; or Portland cement concrete Specification No. 305. All base courses will be six inches in depth, except for the aggregate base which will be eight inches in depth. For State Highways within the City and any other arterial street specified by the City Manager, two inches of base material shall be added to the base course, 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 No. 404, compacted to a depth of two inches and shall be flush with the street surface. 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.
(2) Cement concrete pavements. The restoration of Portland cement concrete pavements shall consist of a two-inch aggregate base, Specification No. 304, under a six-inch course of Portland cement concrete, Specification No. 452, screeded flush with the adjacent pavement surface and broomed for a rough, skid-resistant surface.
(3) Temporary restoration pavements. A temporary restoration adequate for carrying traffic may be approved by the City Manager. The City Manager will establish the specifications for the temporary restoration work in accordance with the existing conditions.
(Ord. 688AC. Passed 4-20-70.)