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2025 FEDERAL OVERLAY, W MUKILTEO BLVD – GLENWOOD AVE TO DOGWOOD DR <br /> PAGE SP75 OF SP123 SPECIAL PROVISIONS <br />WORK ORDER #3842 April 15, 2025 FEDERAL AID# NHPP-2776(011) <br /> 1 <br />3. Shall mix the HMA after delivery by the hauling equipment and prior to 2 <br />placement into the paving machine. 3 <br /> 4 <br />4. Shall mix the HMA sufficiently to obtain a uniform temperature throughout the 5 <br />mixture. 6 <br /> 7 <br />5-04.3(3)E Rollers 8 <br />Rollers shall be of the steel wheel, vibratory, oscillatory, or pneumatic tire type, in good 9 <br />condition and capable of reversing without backlash. Operation of the roller shall be in 10 <br />accordance with the manufacturer’s recommendations. When ordered by the Engineer 11 <br />for any roller planned for use on the project, the Contractor shall provide a copy of the 12 <br />manufacturer’s recommendation for the use of that roller for compaction of HMA. The 13 <br />number and weight of rollers shall be sufficient to compact the mixture in compliance 14 <br />with the requirements of Section 5-04.3(10). The use of equipment that results in 15 <br />crushing of the aggregate will not be permitted. Rollers producing pickup, washboard, 16 <br />uneven compaction of the surface, displacement of the mixture or other undesirable 17 <br />results shall not be used. 18 <br /> 19 <br />5-04.3(4) Preparation of Existing Paved Surfaces 20 <br />When the surface of the existing pavement or old base is irregular, the Contractor shall 21 <br />bring it to a uniform grade and cross-section as shown on the Plans or approved by the 22 <br />Engineer. 23 <br /> 24 <br />Preleveling of uneven or broken surfaces over which HMA is to be placed may be 25 <br />accomplished by using an asphalt paver, a motor patrol grader, or by hand raking, as 26 <br />approved by the Engineer. 27 <br /> 28 <br />Compaction of preleveling HMA shall be to the satisfaction of the Engineer and may 29 <br />require the use of small steel wheel rollers, plate compactors, or pneumatic rollers to 30 <br />avoid bridging across preleveled areas by the compaction equipment. Equipment used 31 <br />for the compaction of preleveling HMA shall be approved by the Engineer. 32 <br /> 33 <br />Before construction of HMA on an existing paved surface, the entire surface of the 34 <br />pavement shall be clean. All fatty asphalt patches, grease drippings, and other 35 <br />objectionable matter shall be entirely removed from the existing pavement. All 36 <br />pavements or bituminous surfaces shall be thoroughly cleaned of dust, soil, pavement 37 <br />grindings, and other foreign matter. All holes and small depressions shall be filled with an 38 <br />appropriate class of HMA. The surface of the patched area shall be leveled and 39 <br />compacted thoroughly. Prior to the application of tack coat, or paving, the condition of 40 <br />the surface shall be approved by the Engineer. 41 <br /> 42 <br />A tack coat of asphalt shall be applied to all paved surfaces on which any course of HMA 43 <br />is to be placed or abutted; except that tack coat may be omitted from clean, newly paved 44 <br />surfaces at the discretion of the Engineer. Tack coat shall be uniformly applied to cover 45 <br />the existing pavement with a thin film of residual asphalt free of streaks and bare spots at 46 <br />a rate between 0.02 and 0.10 gallons per square yard of retained asphalt. The rate of 47 <br />application shall be approved by the Engineer. A heavy application of tack coat shall be 48