Report originally published February 2006, this edition is an October 2007 reprintPDFManualhttp://ntl.bts.gov/lib/26000/26800/26882/EnvironmentallySensitiveMaintenance_DirtGravelRoads.pdfUSEPA-PA-2005CP-83043501-0Earth roadsGravel roadsHighway maintenanceEnvironmental policyEnvironmental impactsErosion controlDrainageUnited StatesPennsylvania. Dept. of TransportationUnited States. Environmental Protection AgencyGesford, Alan L.Anderson, John A. (John Alan), 1954-Indiana University of Pennsylvania. Administration & Leadership Studies. Research & Training CenterPennsylvania State University. Institute of State and Regional AffairsPennsylvania. Dept. of Transportation. Bureau of Maintenance and OperationsUnited States. Environmental Protection...