Agenda - Council - 06/09/2026 - Laserfiche WebLink

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Proposal for Pavement Evaluation Andrie St and 164th Ln, Ramsey, MN June 3, 2026 AET Proposal No. P-0053287 AMERICAN ENGINEERING TESTING 2.1 Ground Penetrating Radar (GPR) Survey To understand the existing pavement thickness, we propose to perform a GPR survey in all drive lanes. The data will be collected at a rate of 2 scans per foot (6-inch intervals), using a 2 GHz antenna and GSSI Roadscan equipment, which allows material layer measurements at depths of up to 18 inches; less penetration or data clarity can be expected in densely populated areas. The GPR data collection system is linked to GPS coordinates. We will use the pavement thicknesses measured in cores and shallow borings as "ground truth" for our GPR analysis. Our GPR data collection will also include high -resolution video, which we will use to review current pavement surface conditions. 2.2 Field Exploration • Obtain any necessary City right-of-way permit for drilling. We assume there will be no fee for the permit. • Provide traffic control for all cores and borings. Based on the roadway configurations, speeds, and traffic levels, we are planning for this to include signs and cones only. • Extract 5 or 6, 6-inch diameter pavement cores at or near locations selected following review of the GPR data and approved by the City. The purpose of the cores is to provide "ground truth" verification to GPR data and to obtain material for asphalt laboratory testing. • At each location, perform a dynamic cone penetrometer (DCP) test to estimate the stiffness of the aggregate base and subgrade and advance a hand auger borings to the bottom of aggregate base or to a maximum depth of 18 inches to measure layer thicknesses. • Collect as -drilled core locations utilizing GPS equipment with submeter accuracy. Following our field work, we will remove excess cuttings from the pavement surface and patch the holes at the surface with bituminous cold patch. Even after backfilling, some sloughing of the backfill may occur, resulting in a potential tripping hazard. AET cannot accept any liability associated with injury after we leave the site. 2.3 Soil Laboratory Testing We will initiate routine laboratory testing by reviewing each recovered soil sample to assess the major and minor soil components, while also noting the color, degree of saturation, and lenses or seams in the samples. Our services will include laboratory testing of selected soil samples to aid in judging engineering properties of the soils. We will perform moisture content tests on all cohesive soils as well as index tests and passing #200 sieve tests on select materials. On completion of testing, we will visually/manually classify each sample based on texture and plasticity in accordance with the Unified Soil Classification System (USCS) and the American Association of State Highway and Transportation Officials (AASHTO) classification system. 2.4 Asphalt Laboratory Testing The pavement cores will be photographed and documented in our laboratory for total height and condition. We will then perform the following tests on each mix: • Core Density (ASTM D2726) — to evaluate in -place density • Rice Specific Gravity (ASTM D2041) — to evaluate maximum density • Asphalt Extraction and Aggregate Gradation (ASTM D2172 Method E-11) MnDOT Modified C137 and C117 — for asphalt content and aggregate proportions Page 2 of 5