Agenda - Council - 09/27/2016 - Laserfiche WebLink

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OW t hi lon: To work together ko respotibiy grow oar community, and to provide quality, cost -affective, and efckent government tet does. CC Regular Session 7. 5. Meeting Date: 09/27/2016 By: Bruce Westby, Engineering/Public Works Information Title: Adopt Resolution #16-09-173 Approving Change Order #1 for 2016 Mill and Overlay Improvements; Improvement Project 16-00 Division B Purpose/Background: Purpose: The purpose of this case is to approve Change Order #1 for 2016 Mill and Overlay Improvements; Improvement Project 16-00 Division B. Background: City of Ramsey Improvement Project #16-00 Division B proposed a full -width 2" mill and overlay of the existing bituminous pavement on approximately 0.8 miles of Sunwood Drive between Sunfish Lake Boulevard and the bridge located between 14 th Lane and Krypton Street, as well as the removal and replacement of approximately 200 feet of concrete curb and gutter, numerous utility casting adjustments and repairs, upgrades to two pedestrian curb ramps where the trail crosses the "eyebrow" north of Sunwood Drive at the east end of the project, and miscellaneous appurtenant improvements. Mill and overlay improvements are anticipated to extend the life of the pavement approximately 20 years, at which time a second mill and overlay project will likely be proposed. Therefore, as part of overlay projects Staff reviews the existing curb and gutter throughout the corridor and marks sections that need to be removed and replaced due to cracking and failing joints that will allow stormwater runoff to infiltrate through the curb and into the pavement base and subgrade which weakens the pavement base and increases the potential for pavement damage associated with freeze -thaw cycles. This work is then completed by the contractor prior to the mill and overlay process. Curb and gutter also needs to be removed and replaced adjacent to storm sewer castings that are adjusted, replaced, or reset as part of the project. This project included work on over a dozen catch basin castings that called for the removal and replacement of 10 feet of curb and gutter on both sides of the castings. As noted earlier, the plans called for 200 feet of curb and gutter removals to be completed. As the project began, the contractor observed significantly more than 200 feet of curb and gutter being marked for removal. It was then determined that the plans identified only curb and gutter removals adjacent to catch basin castings and along the two upgraded pedestrian curb ramps. The plans included no provisions for curb and gutter removals elsewhere along the corridor. In total, Staff identified 534 linear feet of concrete curb and gutter removals required along the project corridor in addition to the removals needed for catch basin casting work and the two pedestrian curb ramp upgrades, which total 172 linear feet. To prevent project delays Staff negotiated a linear foot cost with the contractor for removing and replacing the additional curb and gutter. The negotiated cost incorporates the necessary additional traffic control, sawcutting curb and gutter on both ends of the removal areas, removing curb and gutter, repairing adjacent pavement damage, and