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e <br />substandard. <br /> <br />Public Works Superintendent Riemer stated North Valley was the contractor for this project and <br />also did the Alpine project and other overlays. <br /> <br />Chairperson Backous asked if North Valley will be used for future projects. <br /> <br />Public Works Superintendent Riemer answered they will be if they bid on projects. <br /> <br />Mr. McKusick explained it came up because he installed two concrete driveways and had <br />purposely left the concrete up 1.5 inches so when the overlay was done, the driveway would <br />slant up. However, the concrete is still 1.5 inches above the asphalt. He again stated he felt the <br />asphalt mat should be consistently at 1.5 to 2 inches from curb to curb and asked what the City is <br />going to do differently in future projects. <br /> <br />Chairperson Backous asked if the variance of depth resulted in requiring tonnage instead of mat <br />depth. <br /> <br />Public Works Superintendent Riemer stated this project required tonnage and was two tons over. <br /> <br />Interim Engineer Wagner advised the specification for this project is standard and used Mn/DOT <br />references, which allow a one-quarter inch tolerance and is measured behind the machine to <br />assure it is laying an adequate mat. Interim Engineer Wagner explained how the road and curb <br />edge is tacked but sometimes the asphalt does not adhere to the curb area because it is rough or <br />dirty. Should that occur, the asphalt could be picked off. <br /> <br />Mr. McKusick noted the paver cannot get directly to the curbing so someone needs to manually <br />spread asphalt to the curbing. If that is not done correctly, the roller compresses it flat to the <br />surface. <br /> <br />th <br />Ms. McKusick stated Levi Dargis, 6741 157 Lane NW, who works for Mn/DOT, had explained <br />that the paver should have unhooked and readjusted. This did not occur and that is why there are <br />two different road levels. <br /> <br />Councilmember Elvig asked what is the repercussion with the contractor at this point. <br /> <br />Public Works Superintendent Riemer stated there is not much because the specifications say a <br />1.5-inch mat and the project met tonnage. <br /> <br />Interim Engineer Wagner explained if none of the core samples are found one-quarter inch below <br />specifications, then it meets the requirements. <br /> <br />Councilmember Elvig noted if a series of cores are taken at the curb, it may find the majority are <br />too thin. <br /> <br />Public Works Committee / July 17, 2012 <br />Page 4 of 9 <br />