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Mr. Gary Gleason, P.E. 13 January 17, 2001 <br /> GME Project No. 9256 <br /> topsoil . Prior to placement of fill needed to grade the site, we <br /> recommend that all the surficial topsoil and vegetation be stripped. <br /> We recommend that the pavement section include a minimum of 1 foot of <br /> select free-draining sand to form a subbase . This will help extend the <br /> pavement life. Preparation of the subgrade and placement of the sand <br /> subbase should be carried our as described under the Site Preparation <br /> section of this report . <br /> Based on a subgrade as described above, we recommend the following <br /> pavement section. <br /> RECOMMENDED PAVEMENT THICKNESSE3 <br /> Light-Duty Heavy-Duty <br /> (automobiles/light (entry/service <br /> Pavement Component trucks) drives) <br /> Subbase, fr'ee-draining sand 12 inches 12 inches <br /> Granular base course, . Mn/DOT 6 inches 10 inches <br /> Class 5 100� crushed rock or 100� <br /> recycled concrete <br /> Binder course 1 .5 inches 2 inches <br /> Tack Coat, Mn/DOT 2357 Yes Yes <br /> Wear course 1 . 5 inches 2 inches <br /> We estimate that these pavement sections would have a useful life of 10 to <br /> 15 years. However, this does not mean that the pavements would last this <br /> period of time without maintenance. Within one to three� years after <br /> construction, typical shrinkage cracks will develop due to thermal <br /> expansion and contraction of the pavement, and due to the loss of volatile <br /> tiME CONSULTANTS,INC. <br />