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2025 FEDERAL OVERLAY, BROADWAY – CALIFORNIA ST TO 18TH ST SPECIAL PROVISIONS <br />FEDERAL AID# STBGUL-2715(012); COE PW# 3841 SP-76 May 6, 2025 <br /> <br />Equipment shall not operate on tacked surfaces until the tack has broken and cured. If 1 <br />the Contractor’s operation damages the tack coat it shall be repaired prior to placement 2 <br />of the HMA. 3 <br /> 4 <br />The tack coat shall be CSS-1, or CSS-1h emulsified asphalt. The CSS-1 and CSS-1h 5 <br />emulsified asphalt may be diluted once with water at a rate not to exceed one-part water 6 <br />to one-part emulsified asphalt. The tack coat shall have sufficient temperature such that 7 <br />it may be applied uniformly at the specified rate of application and shall not exceed the 8 <br />maximum temperature recommended by the emulsified asphalt manufacturer. 9 <br /> 10 <br />5-04.3(4)A Crack Sealing 11 <br />When the Proposal includes a pay item for crack sealing, seal cracks in accordance with 12 <br />Section 5-03. 13 <br /> 14 <br />5-04.3(4)B Vacant 15 <br /> 16 <br />5-04.3(4)C Pavement Repair 17 <br />The Contractor shall excavate pavement repair areas and shall backfill these with HMA 18 <br />in accordance with the details shown in the Plans and as marked in the field. The 19 <br />Contractor shall conduct the excavation operations in a manner that will protect the 20 <br />pavement that is to remain. Pavement not designated to be removed that is damaged as 21 <br />a result of the Contractor’s operations shall be repaired by the Contractor to the 22 <br />satisfaction of the Engineer at no cost to the Contracting Agency. The Contractor shall 23 <br />excavate only within one lane at a time unless approved otherwise by the Engineer. The 24 <br />Contractor shall not excavate more area than can be completely finished during the 25 <br />same shift, unless approved by the Engineer. 26 <br /> 27 <br />Unless otherwise shown in the Plans or determined by the Engineer, excavate to a depth 28 <br />of 1.0 feet. The Engineer will make the final determination of the excavation depth 29 <br />required. The minimum width of any pavement repair area shall be 40 inches unless 30 <br />shown otherwise in the Plans. Before any excavation, the existing pavement shall be 31 <br />sawcut or shall be removed by a pavement grinder. Excavated materials will become the 32 <br />property of the Contractor and shall be disposed of in a Contractor-provided site off the 33 <br />Right of Way or used in accordance with Sections 2-02.3(3) or 9-03.21. 34 <br /> 35 <br />Asphalt for tack coat shall be required as specified in Section 5-04.3(4). A heavy 36 <br />application of tack coat shall be applied to all surfaces of existing pavement in the 37 <br />pavement repair area. 38 <br /> 39 <br />Placement of the HMA backfill shall be accomplished in lifts not to exceed 0.35-foot 40 <br />compacted depth. Lifts that exceed 0.35-foot of compacted depth may be accomplished 41 <br />with the approval of the Engineer. Each lift shall be thoroughly compacted by a 42 <br />mechanical tamper or a roller. 43 <br /> 44 <br />5-04.3(5) Producing/Stockpiling Aggregates and RAP 45 <br />Aggregates and RAP shall be stockpiled according to the requirements of Section 3-02. 46 <br />Sufficient storage space shall be provided for each size of aggregate and RAP. Materials 47 <br />shall be removed from stockpile(s) in a manner to ensure minimal segregation when 48