Remove asphalt concrete surfacing by milling in accordance with these specifications and in conformity with the average depth, width, grade, cross-slope and typical sections shown on the plans or as established. 509.02 EQUIPMENT. Use an approved self-propelled milling machine or grinder for milling asphalt surfacing in accordance with 503.12. 509.03 CONSTRUCTION REQUIREMENTS. Prior to milling, pavement surface shall be clean, free of debris, properly de-grassed, and swept if necessary. Pavement surfaces resulting from milling operations shall be of uniform texture, grade and cross slope and free from loose material. Re-mill surfaces not meeting these requirements at no direct pay. Uneven, undulating surfaces will not be accepted. If ridges are excessive, the Project Engineer may require additional milling, replacement of milling machine teeth, or other corrective action. Limit the maximum depth of milling to 2 inches per day when traffic is being maintained. Maintain a maximum 2-inch depth at milling edge of embankment at all times Use a minimum length 25-foot traveling reference plane on the first pass of the milling machine. A shoe device may be used on adjacent passes. When the entire roadway width has not been milled to a flush surface by the end of a work period, resulting in a vertical or near vertical longitudinal face exceeding 2 inches in height, slope this longitudinal face as directed. Place smooth transitions at transverse joints prior to restoring to traffic by milling or by using an asphalt concrete mix. Do not use RAP. Transitions shall be a minimum length of one linear foot per 1/4 inch of the milled depth. Make provisions at drives and turnouts to maintain local traffic. Remove asphalt concrete next to structures or in small irregular areas that cannot be removed by the milling machine by other acceptable methods. Provide drainage of milled areas, as necessary, by cutting through the shoulder to the ditch on the same day that adjacent milling is performed. After the roadway is completed, but prior to any required shoulder overlay, restore areas where drainage cuts are made in-kind, in accordance with Section 203, 401, 510, or 602. The milling operation shall not precede the subsequent paving operation by more than 5 calendar days. Delay in starting the paving operations that causes a further degradation in the milled surface shall be corrected by the contractor by additional milling or providing leveling at no additional pay. Severe raveling or degradation of the milled surface that occurs shall be reported to the Project Engineer in writing with station locations identified. The Project Engineer will direct corrective action. Place temporary pavement markings prior to opening the roadway to traffic in accordance with Section 713. Immediately haul, or as agreed upon by the Engineer, all reclaimed asphalt pavement (RAP) material to be retained by the Department for its recycling program, or by other government entities to the storage facility indicated on the plans and stockpile as directed. The contractor may also be required to retain a specified percentage or quantity of the RAP generated by the project.
