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2025 PAVEMENT MAINTENANCE OVERLAY SPECIAL PROVISIONS <br />PW# 3830 <br /> SP-74 March 26, 2025 <br /> <br /> 1 <br /> 2 <br />DIVISION7.GR7 3 <br />Division 7 4 <br />Drainage Structures, Storm Sewers, Sanitary 5 <br />Sewers, Water Mains, and Conduits 6 <br /> 7 <br />7-05.DOCX 8 <br />Manholes, Inlets, Catch Basins, and Drywells 9 <br /> 10 <br />7-05.3.DOCX 11 <br />Construction Requirements 12 <br /> 13 <br />GLF 7-05.3(1).DOCX 14 <br />Adjusting Manholes and Catch Basins to Grade 15 <br /> 16 <br />Section 7-05.3(1) of the standard specifications is deleted and replaced with the following: 17 <br /> 18 <br />(******) 19 <br />In most work locations, planing depth is equal to overlay depth. Therefore, significant 20 <br />iron adjustment is not anticipated, and adjustment of structures to grade shall occur 21 <br />only as needed and/or directed by the engineer. 22 <br /> 23 <br />Manholes, catch basins, and other structures shall not be adjusted to grade until the 24 <br />pavement is completed, at which time the center of each structure shall be carefully 25 <br />relocated from references previously established by the Contractor. The structure 26 <br />shall then be brought to proper grade as follows: 27 <br /> 28 <br />1. The existing cast iron ring and cover on manholes and existing cast iron frame 29 <br />and grates for catch basins and inlets shall be removed and thoroughly 30 <br />cleaned before reinstalling at the new elevation. 31 <br /> 32 <br />2. The asphalt concrete pavement shall be cut and removed to a new circle, the 33 <br />diameter of which shall be equal to the outside diameter of the cast iron frame 34 <br />plus 2’. 35 <br /> 36 <br />3. The roadway surface materials and crushed rocks shall be removed so the 37 <br />structure casting can be adjusted to the finished road grade elevation. 38 <br /> 39 <br />4. The cast iron frame shall be placed on concrete blocks and wedged up to the 40 <br />desired grade with plastic wedges. 41 <br /> 42 <br />5. The edges of the asphalt concrete pavement and the outer edge of the 43 <br />castings shall be painted with tack and HMA Class ½” PG 64-22 shall be 44 <br />placed and compacted in layers to a minimum of 91% of the maximum 45 <br />theoretical density of the HMA. 46 <br /> 47 <br />The completed patch shall match the existing paved surface for texture, density, and 48 <br />uniformity of grade. The joint between the patch and the existing pavement shall 49