Agenda - Council - 04/12/2016 - Laserfiche WebLink

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3. EXISTING CONDITIONS 3.1 Existing Streets The existing right-of-way along the segment of Sunwood Drive that is proposed to receive mill and overlay improvements with this project is 80 feet in width. This segment of Sunwood Drive was originally constructed in 1996. The pavement section was constructed with 31/2 inches of bituminous over 4 inches of aggregate base, and B618 concrete curb and gutter was constructed along both sides of the street. Storm sewer exists along the entire segment. The street is 30 feet wide between Sunfish Lake Boulevard and 145th Lane, and 40 feet wide from 145th Lane to the bridge. City staff visually inspects each public street segment throughout the City, typically on an annual basis, to determine the pavement condition. Staff uses the Pavement and Surface Evaluation Rating (PASER) method to assign a numerical rating between 1 and 10 to each street segment. Streets rated with a 1 are considered to have failed pavements in need of total reconstruction, while streets rated as a 10 are considered to be in excellent condition requiring no improvements. The segment of Sunwood Drive proposed to receive mill and overlay improvements in 2016 has PASER ratings of 4 for the segment between Sunfish Lake Boulevard and 145th Lane, and 5 for the segment from 145th Lane to the bridge, making it an excellent candidate for mill and overlay improvements in 2016. A second overlay will likely be necessary in another 20 years or so. Staff is proposing a full mill and overlay project based on the way the pavement is deteriorating. The wear course is stripping away from the base course so staff proposes to mill the entire wear course and replace it with a new wear course. This type of pavement deterioration, called stripping, has become more and more common over the last decade or so and occurs on streets that were constructed in the mid-1990's using mix design 2340 and then sealcoated after. Staff does not believe there are any issues with the subgrade soils that will negatively impact the life of the proposed improvements. Staff also does not believe groundwater will impact the proposed improvements. 3.2 Watermain Trunk watermain exists under this segment of Sunwood Drive and appears to be in good working condition. 3.3 Sanitary Sewer Sanitary sewer exists under portions of this segment of Sunwood Drive and appears to be in good working condition. 3.4 Storm Sewer/Drainage Storm sewer exists under this segment of Sunwood Drive and appears to be in good working condition. Feasibility Report 2016 Street Maintenance Program, Division B: Overlay Improvements City of Ramsey Project No. 16-00 Page 3