Agenda Packets - 2004/12/13 - Laserfiche WebLink

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3 PROJECT UPDATES COUNTY ROAD H2 STREET IMPROVEMENT PROJECT All the remaining punch list items have been addressed earlier this year. The areas calling for seed and mulch have been addressed and the traffic signage has been re-installed. In May the City forester oversaw the plantings of a couple dozen trees that were required as part of this project. Most were planted in the area of the theatre site; a few will be planted at the northwest corner of Silver Lake Road and County Road H2. There was an issue with the acceptance of the paving portion of the contract. The wear course of bituminous was installed in mid-November of 2003. The conditions in which the material was installed were in violation of the specifications. The resulting product is also in violation of the specifications. The depth of the wear course bituminous is too thick in many areas. The results are manholes and gate valves embedded far too deeply into the pavement. The wear course bituminous also does not match into the curb elevation in many places as required by specification. The subcontractor, Midwest Asphalt, in an attempt to rectify this issue, had offered to mill down the edges, raise manholes and gate valves, and then apply a rock chip seal to the roadway surface. The engineering consultant hired by the City to design and oversee this project recommended that city accept Midwest’s rock chip sealing offer. Staff had questioned SEH as to where chip sealing of this nature has been applied to a roadway carrying 5000 vehicles per day, as County Road H2 does. Staff’s position was that chip sealing County Road H2 would create other problems. Because of the problems associated with chip sealing higher volume roadways, Mn/DOT and the County no longer seal their roadways. The specifications call for the removal and reconstruction of all portions of the wear course that are not in compliance with the specification tolerance. Staff therefore rejected Midwest’s offer. Midwest Asphalt milled down the bituminous in areas that were applied incorrectly and repaved the project. The extra quantities of bituminous that were used in the original application were removed from the billable quantities. On June 28, 2004 the City received bids to perform a saw and seal on County Road H2. This is a technique to maximize the investment and increase the longevity of a new bituminous pavement. The project was awarded to Bergman Companies in the amount of $7,105.00 for saw and sealing 4,900 linear feet or $1.45/ LF. Saw and Seal involves creating expansion joints by sawing a joint into the pavement at selected locations – typically every 40 to 60 feet. These joints are then sealed with a rubberized compound. The purpose of adding joints is to allow for the expansion and contraction of the paved surface. Without them, the pavement will crack on its own, leaving areas where moisture / frost can accelerate deterioration of the roadway. This technology has been studied by Mn/DOT for years, and with its minimal expense, has proven to be cost effective as part of the construction of new streets. On November 29, 2004 the City received a letter from SEH recommending the acceptance and final payment for this project. This will be presented to the City Council for approval on December 13, 2004. On November 24, 2004, City Staff, SEH, the project contractor, and the Rice Creek Watershed District met on-site to address three issues the watershed was concerned with. As a result of that meeting, the City will be modifying the pond on the south side of County Road H2 near the entrance to Hidden Hollow by adding a skimmer structure and cleaning out the muck that has accumulated in this pond. Staff will also be modifying the gutter line (saw cutting) near a few inlets to rain gardens along County Road H2 to allow more water to be directed to these water infiltration devises.