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<br />hb/ILJ <br />~ <br /> <br />" <br /> <br />rJ <br /> <br />us. Depcrrrr.enr <br />of TrcnspcrroTicn <br /> <br />Federal Highway <br />Administration <br /> <br />Hydraulic Engineering Circular No. 18 <br /> <br />Publication No. FHW A <br />November 1990 (Draft) <br /> <br />. <br /> <br />EVALUATING SCOUR <br />AT BRIDGES <br /> <br />Research, Development, and Technology <br />Turner-Fairbank Highway Research Center <br />6300 Georgetown Pike <br />Mclean, Virginia 22101-2296 <br /> <br />. <br />