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Important Information
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The Minnesota County Engineers Association (MCEA) and the 10 Ton Committee directed State Aid for Local Transportation to collect pavement materials data on the County State Aid Highway (CSAH) system. Pavement materials data was collected on approximately 9,000 miles. Tested routes were primarily the Tier 1 portion of the 10 Ton system, which are the routes identified by the county engineers as their heavy truck routes.
The consultant team of Braun Intertec, American Engineering Testing, and SRF Consulting Group, Inc. was selected and placed under contract in May 2009 to perform the pavement materials data gathering work. The consultant team asked each county to identify approximately one-third of their CSAH mileage to be falling weight deflectometer (FWD) tested and to provide pavement materials information for these tested routes. In May 2009, testing began and by the end of 2010, all field FWD data had been completed.
The “Analysis Tool” uses FWD data, pavement data, soil data, temperature data and traffic data to evaluate roadway strength (10 ton, 9 ton, etc.). The “Analysis Tool” was originally developed by Erland Lukanen, from Mn/DOT and was further refined under the direction of Professor Jim Wilde, Minnesota State University, Mankato, MN.
As of June 2010, approximately one-half of the Minnesota counties had been provided Version 1.1 of the FWD “Analysis Tool”. Version 1.1 of the “Analysis Tool” required manual entry of some parameters to determine the roadway strength. In May 2011, counties were provided version 1.2, which automatically inputs the required parameters to determine the roadway strength. The only input parameter that the user may change is “traffic”.
If you have any questions concerning the FWD contract or the “Analysis Tool”, please contact Paul Stine, State Aid Operations Engineer, at 651-366-3830.
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