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AMERICAN ENGINEERING TESTING, INC. AET Project No. 26-00538 <br /> 6® Pavement Design <br /> Based on the traffic counts provided to us by the City and the estimated growth rates which have <br /> been provided by MnDOT, we are anticipating two separate load levels for streets throughout the <br /> project. 3rd Street NW has an anticipated load level of 1450 Anrlual Average Daily Traffic <br /> (A T)9 all other streets evaluated by AET for this project have an anticipated load level of <br /> 2350 AADT. We have assumed a growth rate of 3% based on MnDOT projections for <br /> Sherburne County. <br /> Based on anticipated loads we have calculated that 3rd Street NW will require a minimum total <br /> gravel equivalency (GE) of 18.11-inches (within 0.5-inches). The remaining streets evaluated by <br /> AET for this project will require a minimum total GE of 21.09-inches (within 0.5-inches) based <br /> on the anticipated loads. In addition to exceeding the minimum GE, we recommend the <br /> bituminous thickness be a minimum 3.5 inches and the total section be a minimum of 12.5 <br /> inches. <br /> Table A, below, shows two options for recommended pavement designs based on the two <br /> anticipated load scenarios throughout the project. <br /> Pavement Design: Table A <br /> Location 3r Street NW Railroad Ave, and others <br /> Section Option Option-I Option-2 Option-] Option-2 <br /> Wear Course 2-inches 1.5-inches 2-inches 1.5-inches <br /> Non-wear Course 2.5-inches 2-inches 2.5-inches 2-inches <br /> Aggregate base 8-inches 6-inches 10-inches 8-inches <br /> Select Granular N/A 12-inches N/A 12-inches <br /> Total GE 18.13 19.88 20.25 21.88 <br /> Page 7 of 9 <br />