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Summary of Pavement Coring Services <br />CR 512 from Rosland Road to U S. Highway 1 o Sebastian, Florida <br />September 16, 2014 o Dunkelberger Project No. HB145025 <br />Table III: Structural Number for Southwest -bound Direction <br />Page 4 <br />Material <br />Thickness (in) <br />Structural Coefficient* <br />Structural Number <br />Asphalt (Type S or SP) <br />2.8 <br />0.25 <br />0.7 <br />Base Rock (LBR 100) <br />10.2 <br />0 18 <br />1 8 <br />Stabilized Subgrade <br />(LBR 40) <br />12.6 <br />0.08 <br />1.0 <br />Total <br />3.5** <br />* Actual structural coefficients for the base and stabilized subgrade layers may be less since <br />LBR values not confirmed by testing <br />**The design SN of the same pavement structure would be 4.0 <br />Table IV: Structural Number for Northeast -bound Direction <br />Material <br />Thickness (in) <br />Structural Coefficient* <br />Structural Number <br />Asphalt (Type S or SP) <br />4 8 <br />0.25 <br />1.2 <br />Base Rock (LBR 100) <br />11 4 <br />0 18 <br />2.1 <br />Non -stabilized Subgrade <br />9 5 <br />0 <br />0 <br />Total <br />3.3** <br />* Actual structural coefficients for the base layer may be less since LBR value not confirmed by <br />testing <br />**The design SN of the same pavement structure would be 4.2 <br />Based on observed conditions, the existing pavement components appear favorable for the <br />County's desired method of full depth reclamation. The thickness of the asphalt at the location <br />of Core C-18, along with multiple overlays, may suggest on-going settlement or subsidence of <br />embankment soils. This area should be further explored prior to performing the reclamation <br />work. <br />DUNKELBERGER <br />