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Treatment Types and Costs <br />Based on historic and current construction costs provided by the Engineering Division, each <br />functional class has an estimated unit cost for overlay and reconstruction treatments. For local streets <br />(FC-5) an additional maintenance option was considered, slurry seals. The slurry seal option allows <br />for a cost-effective treatment for local street segments, which do not carry high traffic loads. <br />OVERLAY: Typical overlay rehabilitation costs include milling of existing pavement to a moderate <br />depth to remove existing cracking and increase strength of the structural section. Isolated areas of <br />severely distressed pavement are removed and replaced including a new aggregate base. Associated <br />costs include replacement of striping and pavement markings, adjustment of manholes, and other <br />work needed to return the street to normal operation. <br />RECONSTRUCT: Typical street reconstruction costs include removal of the existing pavement and <br />base structural section and replacement with a new structural section which will meet a 20-year <br />design life. Isolated areas of curb and gutter are replaced where they would not be suitable to contain <br />new paving or have severe drainage problems. Associated costs include replacement of striping and <br />pavement markings, adjustment of manholes, and other work needed to return the street to normal <br />operation. <br />SLURRY SEAL: Typical slurry seal costs include street cleaning, removal of vegetation, sealing of <br />cracks, and application of an emulsified asphalt aggregate mixture to the entire paved surface. <br />Associated costs include replacement of striping and pavement markings, and other work needed to <br />return the street to normal operation. <br />Treatment – Functional Class <br />Improved System 12’ Lane Mile Cost <br />Updated Eng. <br />2005 cost2006 cost2010 cost <br />Overlay - FC 1 & 2 $122,000 $215,000 $233,000 <br />Overlay - FC 3 & 4 $156,000 $184,000 $200,000 <br />Overlay - FC 5 $73,000 $169,000 $184,000 <br />Re-Const - FC 1 & 2 $545,000 $765,000 $828,000 <br />Re-Const - FC 3 & 4 $365,000 $677,000 $734,000 <br />Re-Const - FC 5 $230,000 $505,000 $547,000 <br />Slurry Seal - FC 5 $11,000 $19,000 $21,000 <br /> 8 <br />