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1 <br />U.S. Department <br />of Transportation <br />Federal Highway <br />ttptjOgoo- <br />PB2001-105207 <br />IIIIIIIIIIIIIIIIII <br />Publication No. FHWA-TS-89-045 <br />September 1989 <br />ROCK SLOPES: <br />Design, Excavation, Stabilization <br />Research, Development, and Technology <br />Turner-Fairbank Highway Research Center <br />6300 Georgetown Pike <br />McLean, Virginia 22101-2296