490.1 490.4
490.1DESCRIPTION —This work is removal of an existing surface course.
490.3CONSTRUCTION —Carefully remove the existing asphalt surface course, within limits shown on the
plans or as directed . Use an acceptable removal method. Neatly trim the edges of remaining asphalt surface to a vertical line. At locations determined by the Representative, clean the surface of the existing base course and repair damage to the adjacent surface or underlying base.
490.4MEASUREMENT AND PAYMENT —Square Yard
491.1 491.4(b) 491 – 1
491.1DESCRIPTION —This work is the milling of an existing asphalt pavement surface.
491.3CONSTRUCTION —
with an automatic grade and slope control system and be capable of milling concrete.
that conforms to the surface tolerance requirements of Section 4 13.3(l). Immediately after milling, remove milled material . Carefully remov e the existing asphalt material around utility facilities within work areas. Repair or replace utility facilities that are damaged by the milling operation to the satisfaction of the utility owner. Control the rate of milling to avoid tearing of the mat, which causes chunky and non-uniformly milled material. If directed, separate oversized and chunky milled material. Maintain the milled pavement surface free of all loose materials and dust. Do not allow traffic to drive on any milled surface for more than 6 calendar days. Place the first overlaying asphalt course within 7 calendar days from the start of the milling operation. Failure to overlay a milled section of roadway within 7 calendar days after it has been milled will constitute a failure to comply with a contract traffic control requirement for which work zone liquidated damages, as specified in section 108.07 (c), will be assessed . Work stoppages caused by the Department, Utilities, and documented weather delays will not count towards the 7 calendar days for calculating Work Zone Liquidated Damages. Maintain all milled surfaces and re pair or replace any areas damaged due to the asphalt overlay not being placed within 7 calendar days of the milling operation methods accepted by the Representative at no additional cost to the Department. If the first course of the asphalt overlay is not placed on the same day of the milling operation, install ROUGH ROAD (W8 -8) signs according to Publication 212, Publication 213, and MUTCD 1/2- mile in advance of the project and at a minimum of 1/2- mile intervals throughout the project befor e the end of the day. Eliminate vertical edges around utilities