Driving Surface Aggregate (DSA)

DSA is an aggregate mixture designed by the Center for use as a wearing course for unpaved roads. It is the only wearing course to be purchased with Dirt and Gravel Road Program funds.

DSA Specification and Certification (117kb): Notarized form to certify stone from a quarry. Includes DSA specification. (3/07)

DSA Informational Bulletin (1.8Mb): Complete DSA details. (Updated 3/09))

DSA Issue of CDGRS Newsletter (186kb):March 2007 Issue of Newsletter all about DSA and PennDOT DSA approval for Liquid Fuels. (3/07)

DSA Supplier List (16kb): List of known DSA sources statewide. (for informational purposes, Center does not endorse sources) (3/06)

Sample Bid Documents (208kb): Sample DSA bidding documents from the Bradford County Conservation District. (5/04)

Trail Mix Aggregate (600kb): Aggregate specification designed for use on trails. (9/09) NEW