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<br /> <br />02574 - 7/9 <br />restoration. The finish elevation of the new full lane overlay shall meet existing <br />elevations adjacent to the new work. <br />D. The existing asphaltic concrete surface shall be saw cut for its full depth or 1-inch <br />minimum, and then stripped back for at least 2 feet into the area to be overlaid to a <br />second cut which shall also be in clean straight lines. The second, or interior, cut <br />edge shall be rolled with a tandem roller weighing not less than 8 tons before the <br />overlay is applied. The stripped area shall be used to provide a smooth transition or <br />"feather" area between the overlay and the existing pavement. Before placing the <br />overlay, all cut edges and the surface of the stripped area shall be tack coated with <br />emulsified asphalt as specified hereinbelow. <br />E. If the Contractor requests in writing to "feather" the longitudinal edge, and if written <br />permission is granted to "feather" the asphalt by the Department and the City, a <br />sanded mix of 70-30 type shall be used. "Feathering" shall begin 18 inches from the <br />tapered edge. <br />F. Prior to installing a full roadway width overlay over existing asphaltic pavement the <br />trench and shoulders over the pipe shall be sawcut and filled with asphaltic concrete <br />to the required depth, terminating flush with the existing adjacent asphalt in <br />accordance with the municipality having jurisdiction over the work for Type I. Type V <br />overlay will be installed as detailed above. <br />G. When a minor amount of asphalt surface will remain, generally with large pipe <br />installations, after the pipe has been installed and the required longitudinal saw <br />cutting of the asphaltic pavement completed, the Contractor may request permission <br />to remove all the asphalt in the lane, by saw cutting the asphalt adjacent to the <br />existing lane, then placing the Type V overlay flush with the adjacent asphalt. This <br />would require that the Type I, finish elevation be lowered 1 inch to allow for the Type <br />V overlay. <br />H. Before the overlay is applied, existing surfaces shall be swept clean of all dirt and <br />debris, using a power driven broom if warranted by the size of the location to be <br />overlaid and/or as ordered by the Department. Pavement edges shall be cleared of <br />all encroaching vegetation, loose sand, rock and all other foreign matter. When the <br />existing surface is thoroughly clean, a tack coat of Emulsified Asphalt Grade RS-2 <br />(anionic) shall be applied at the rate of approximately 0.10 gallon per square yard, in <br />accordance with Section 300, immediately followed by the asphaltic concrete <br />overlay. <br />I. Machine-laid overlay shall be placed by means of an approved mechanical spreader <br />and finisher, and the mixture shall be compacted to true grade and cross section by <br />means of a tandem roller weighing not less than 8 tons. <br />J. The compacted overlay shall be thicker as required to produce a smooth uniform <br />surface free of any irregularities, but shall not be less than one inch in thickness. <br />Existing depressed areas in the asphaltic pavement, which could collect water after a <br />rainfall shall be corrected before placing the asphaltic overlay. Rolling shall proceed <br />as close behind the spreading of the asphaltic overlay as possible, and all materials <br />shall be completely compacted the same day it is placed. <br />3.05 PATCHING REPAIRS <br />A. Paving repairs using asphalt patching shall not be allowed under this contract. <br />B. Pavement patching repairs will only be allowed as directed by the ENGINEER.