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<br />~~ <br /> <br />~Y'j)Y)e'r 2-{J-:;- <br /> <br />u.s. Department <br />of Transportation <br /> <br />Federal Highway <br />J~dministration <br /> <br />Publication No. flfWA HI-91-011 <br />Revised October 1999 <br /> <br />NHI Course No. 13046 <br /> <br />Stream Stability and Scour <br />at Highway Bridges <br />Participant Workbook <br /> <br /> <br />, <br />.. <br />, <br />\ <br /> <br />'~t~~i::.... <br />!<:;~?i;-:;:",;;:si~!-.""..~. '.~ ~ <br />'~.l,: _: .1". ._ . <br /> <br />. <br />. <br />I ~ I : II National Highway Institute <br />. <br />. <br />