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2025 FEDERAL OVERLAY, W MUKILTEO BLVD – GLENWOOD AVE TO DOGWOOD DR <br /> PAGE SP73 OF SP123 SPECIAL PROVISIONS <br />WORK ORDER #3842 April 15, 2025 FEDERAL AID# NHPP-2776(011) <br />a. A mechanical sampling device attached to the HMA plant. 1 <br /> 2 <br />b. Platforms or devices to enable sampling from the hauling vehicle without 3 <br />entering the hauling vehicle. 4 <br /> 5 <br />5-04.3(3)B Hauling Equipment 6 <br />Trucks used for hauling HMA shall have tight, clean, smooth metal beds and shall have a 7 <br />cover of canvas or other suitable material of sufficient size to protect the mixture from 8 <br />adverse weather. Whenever the weather conditions during the work shift include, or are 9 <br />forecast to include precipitation or an air temperature less than 45°F or when time from 10 <br />loading to unloading exceeds 30 minutes, the cover shall be securely attached to protect 11 <br />the HMA. 12 <br /> 13 <br />The Contractor shall provide an environmentally benign means to prevent the HMA 14 <br />mixture from adhering to the hauling equipment. Excess release agent shall be drained 15 <br />prior to filling hauling equipment with HMA. Petroleum derivatives or other coating 16 <br />material that contaminate or alter the characteristics of the HMA shall not be used. For 17 <br />live bed trucks, the conveyer shall be in operation during the process of applying the 18 <br />release agent. 19 <br /> 20 <br />5-04.3(3)C Pavers 21 <br />HMA pavers shall be self-contained, power-propelled units, provided with an internally 22 <br />heated vibratory screed and shall be capable of spreading and finishing courses of HMA 23 <br />plant mix material in lane widths required by the paving section shown in the Plans. 24 <br /> 25 <br />The HMA paver shall be in good condition and shall have the most current equipment 26 <br />available from the manufacturer for the prevention of segregation of the HMA mixture 27 <br />installed, in good condition, and in working order. The equipment certification shall list 28 <br />the make, model, and year of the paver and any equipment that has been retrofitted. 29 <br /> 30 <br />The screed shall be operated in accordance with the manufacturer’s recommendations 31 <br />and shall effectively produce a finished surface of the required evenness and texture 32 <br />without tearing, shoving, segregating, or gouging the mixture. A copy of the 33 <br />manufacturer’s recommendations shall be provided upon request by the Contracting 34 <br />Agency. Extensions will be allowed provided they produce the same results, including 35 <br />ride, density, and surface texture as obtained by the primary screed. Extensions without 36 <br />augers and an internally heated vibratory screed shall not be used in the Traveled Way. 37 <br /> 38 <br />When specified in the Contract, reference lines for vertical control will be required. Lines 39 <br />shall be placed on both outer edges of the Traveled Way of each Roadway. Horizontal 40 <br />control utilizing the reference line will be permitted. The grade and slope for intermediate 41 <br />lanes shall be controlled automatically from reference lines or by means of a mat 42 <br />referencing device and a slope control device. When the finish of the grade prepared for 43 <br />paving is superior to the established tolerances and when, in the opinion of the Engineer, 44 <br />further improvement to the line, grade, cross-section, and smoothness can best be 45 <br />achieved without the use of the reference line, a mat referencing device may be 46 <br />substituted for the reference line. Substitution of the device will be subject to the 47 <br />continued approval of the Engineer. A joint matcher may be used subject to the approval 48