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Stabilized .Construction Roadway TC-2 <br /> ■ Stabilize roadway using aggregate, asphalt concrete, or concrete based on longevity, required <br /> performance, and site conditions. The use of cold mix asphalt or asphalt concrete(AC) <br /> grindings for stabilized construction roadway is not allowed. <br /> ■ Coordinate materials with those used for stabilized construction entrance/exit points. <br /> ■ If aggregate is selected, place crushed aggregate over geotextile fabric to at least 12 in. depth. <br /> A crushed aggregate greater than 3 in.but smaller than 6 in. should be used. <br /> Inspection and Maintenance <br /> ■ Inspect and verify that activity—based BMPs are in place prior to the commencement of <br /> associated activities. While activities associated with the BMP are under way, impact weekly <br /> during the rainy season and of two-week intervals in the non-rainy season to verify <br /> continued BMP implementation. <br /> ■ Keep all temporary roadway ditches clear. <br /> ■ When no longer required, remove stabilized construction roadway and re-grade and repair <br /> slopes. <br /> ■ Periodically apply,additional aggregate on gravel roads. <br /> ■ Active dirt construction roads are commonly watered three or more times per day during the <br /> dry season. <br /> Costs <br /> Gravel construction roads are moderately expensive, but cost is often balanced by reductions in <br /> construction delay. No additional costs for dust control on construction roads should be <br /> required above that needed to meet local air quality requirements. <br /> References <br /> Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from <br /> Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, <br /> 1995• <br /> Coastal Nonpoint Pollution Control Program; Program Development and Approval Guidance, <br /> Working Group,Working Paper; USEPA,April 1992. <br /> Manual of Standards of Erosion and Sediment Control Measures,Association of Bay Area <br /> Governments, May 1995• <br /> Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, <br /> State of California Department of Transportation (Caltrans), November 2000. <br /> Stormwater Management for Construction Activities, Developing Pollution Prevention Plans <br /> and Best Management Practices, EPA 832-R-92005; USEPA;April 1992• <br /> Stormwater Management of the Puget Sound Basin,Technical Manual,Publication #91-75, <br /> Washington State Department of Ecology, February 1992. <br /> )ani,arry 2003 California Stormwater BMP Handbook 3 of 4 <br /> Construction <br /> www.cabmphandbooks.com <br />