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<br />CTA Project No. 19-0035-001-01 02710-2 Golden Shores Street Lighting <br />October 12, 2020 SIB Bid No. 20-09-01 <br />mixed materials are of uniform bearing value throughout the width and depth of the layer <br />being processed. <br />B. At least three density determinations shall be made on each day's final compaction <br />operations on each course, and the density determinations shall be made at more <br />frequent intervals if deemed necessary by the ENGINEER. <br />C. Limerock Base: The limerock base shall be constructed in accordance with Section 200 <br />of the DOT Specifications, to the thickness and width indicated on the Drawings. <br />D. After spreading of the base material is completed, the entire surface shall be scarified <br />and shaped so as to produce the exact grade and cross section after compaction. For <br />double course base, this scarifying shall extend a de pth sufficient to penetrate slightly <br />the surface of the first course. The maximum depth of each lift shall be 8 -inches. <br />E. When the material does not have the proper moisture content to insure the required <br />density, wetting or drying shall be required. If the material is deficient in moisture, water <br />will be added and uniformly mixed in by disking the base course to its full depth. If the <br />material contains an excess of moisture, it shall be allowed to dry before being <br />compacted. As soon as proper conditions o f moisture are attained, the material shall be <br />compacted to an average density not less than 98 percent maximum density as <br />determined in more than one course, the density shall be obtained in each lift of the <br />base. <br />F. During final compacting operations, if blading of any areas is necessary to obtain the <br />true grade and cross section, the compacting operations for such areas shall be <br />completed prior to making the density determination on the finished base. <br />G. Unless otherwise directed by the ENGINEER, the surface shall be "hard-planed" with a <br />blade grader immediately prior to the application of the prime coat to remove the thin <br />glaze or cemented surface and to allow free penetration of the prime material. The <br />materials planed from the base shall be removed fro m the base area. <br />H. If cracks or checks appear in the base, either before or after priming, which in the <br />opinion of the ENGINEER, would impair the structural efficiency of the base course, the <br />CONTRACTOR shall remove such cracks or checks by rescarifying, reshaping, adding <br />base material where necessary and recompacting, at no additional cost to the CITY. <br />I. Mixing Base and Subgrade: If at any time the subgrade material shall become mixed <br />with the base course material, the CONTRACTOR shall, without additiona l <br />compensation, dig out and remove the mixture, reshape and compact the subgrade and <br />replace the materials removed with clean base material, which shall be shaped and <br />compacted as specified above. <br />J. Prime Coat: The prime coat shall be applied at a rate of 0.15 gallons per square yard <br />and the Work performed in accordance with Section 300 of the DOT Specifications. <br />K. Tack Coat: The tack coat shall be applied at a rate between 0.02 and 0.10 gallons per <br />square yard and the Work performed in accordance with Se ction 300 of the DOT <br />Specifications. <br />L. Asphaltic Concrete: The spreading, compacting and jointing the wearing surface shall be <br />in accordance with Sections 330 and 331 of the DOT Specifications to the thickness <br />indicated on the Drawings.