<strong>Federal Highway Administration (FHWA) (2003).</strong> “Section 204.-Excavation and Embankment,” <em>Standard Specifications for the Construction of Roads and Bridges on Federal Highway Projects</em>, FP-03, U.S. Department of Transportation, Washington, D.C., 93-104, downloaded from http://flh.fhwa.dot.gov/resources/pse/specs/ on March 25, 2011.