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<br />fJ <br /> <br />Publication No, FHWA-IP-90-017 <br />November 1995 <br /> <br />us. Department <br />of Transportation <br />Federal Highway <br />Administration <br /> <br />Hydraulic Engineering Circular No, 18 <br /> <br />Evaluating Scour at Bridges <br />Third Edition <br /> <br />Office ofTechnology Applications. HTA-22 <br />Federal Highway Administration <br />400 Seventh Street, S,w. <br />Washington, D,C, 20590 <br /> <br />~ <br />