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1993 Receipts, Res., Disb. & Minutes
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1993 Receipts, Res., Disb. & Minutes
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<br />? <br /> <br /> <br />CONSULTING ENGINEERS <br /> <br />Maier Stewart & Associates Inc. <br /> <br />September 15, 1993 <br /> <br />File No: 260-052-30 <br /> <br />Honorable Mayor and City Council <br />City of Centerville <br />1880 Main Street <br />Centerville, Minnesota 55038 <br /> <br />RE: 1993 SEAL COAT AGGREGATE <br />CmZEN CONCERNS <br /> <br />Dear Mayor Buckbee: <br /> <br />This letter is submitted to address some concerns that have arisen regarding the 1993 Centerville <br />Seal Coat project. Apparently, numerous Centerville residents have voiced concerns that the <br />aggregate used in the project, specifically granite trap rock chips, is too sharp and that aggregate <br />still remains in the streets. <br /> <br />To fITst address the aggregate type; by using the trap rock chips, the resulting street has greater <br />wearability and a longer effective life than can be achieved using pea gravel. The sharper trap <br />rock chips get greater penetration into the street surface and have a lesser affinity to be removed <br />as time goes on. The aggregate used on the Centerville streets is also a harder substance than <br />the pea gravel that is used elsewhere, again, increasing the wearability of the street. <br /> <br />Rock remaining in the street after the completion of the sea1coat is swept up by the contractor <br />and this was adequately completed by Allied Blacktop, Inc. as specified; however, additional <br />aggregate may work free in the days immediately following application. Under normal <br />conditions, the warm weather through the late summer months will allow more aggregate to <br />penetrate the street surface as the underlying bituminous softens in the sun. As the temperatures <br />this past summer never reached 90 degrees, this additional penetration was not as effective as <br />one would expect in a normal summer, thus some residual aggregate still remains in the streets. <br /> <br />Two possible actions may be taken in this situation, the City may hire a contractor to sweep the <br />streets prior to winter or the City may leave the aggregate in place. After observing the <br />conditions of the streets <br /> <br />1959 SLOAN PLACE. SUITE 200. ST. PAUL, MINNESOTA 55117 612-n4-6021 <br />9800 SHELARO PARKWAY, SUITE 102. MINNEAPOLIS. MINNESOTA 55441 612-546-0432 · Equal Opportunity Employer <br />
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