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DUNKELBERGER <br />engineering & testing, inc. <br />Al(erra[ort COMPANY <br />September 16, 2014 <br />Indian River County <br />1801 27th Street <br />Vero Beach, Florida 32960 <br />Attn: Mr. Christopher Kafer, Jr ... via email (ckaferr7a.ircgov.com) <br />Senior Project Manager <br />Re: Summary of Asphalt Pavement Coring Services <br />CR 512 from Rosland Road to U.S. Highway 1 <br />Sebastian (Indian River County), Florida <br />DUNKELBERGER Project Number: HB145025 <br />Dear Mr. Kafer <br />Pursuant to your request and authorization, Dunkelberger Engineering & Testing, a Terracon <br />Company (DUNKELBERGER), has completed Asphalt Pavement Coring for the CR 512 project <br />from Rosland Road to U.S. Highway 1 in Sebastian (Indian River County), Florida. This letter <br />presents thicknesses of the in-place asphalt pavement and descriptions of the underlying <br />components encountered. <br />A. PROJECT INFORMATION <br />The subject roadway section is approximately three miles of four -lane (divided) flexible pavement <br />extending southwest to northeast. The County is planning to rehabilitate the roadway and desires <br />to know the composition of the existing pavement section. We understand full depth reclamation <br />is anticipated DUNKELBERGER was retained to core through the pavement and measure the <br />thickness of the asphalt, base course, and subgrade layers to a depth of approximately two feet <br />below the pavement surface, and determine the AASHTO (American Association of State <br />Highway and Transportation Officials) soil classification of the embankment material where it was <br />encountered. <br />A total of 20 core locations were selected by representatives of the County. The locations were <br />field marked by County surveyors and are depicted on Attachment A, Core Location Plan. The <br />locations are generally staggered between travel lanes at a spacing of approximately 900 feet. <br />Dunkelberger Engineering & Testing, A Terracon Company 607 NW Commodity Cove Port St. Lucie, Florida 34986 <br />P [772] 343-9787 F [772] 343-9404 terracon.com <br />Geotechnical • Environmental • Construction Materials U Facilities <br />