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<br />/;:.~ <br /> <br />ROCK RIPRAP DESIGN FOR PROTECTION OF <br />STREAM CHANNELS NEAR HIGHWAY STRUCTURES <br />VOLUME 2 -- EVALUATION OF RIPRAP DESIGN PROCEDURES <br /> <br />U.S. GEOLOGICAL SURVEY <br />Water-Resources Investigations <br />Report 86-4128 <br /> <br /> <br />Prepared in cooperation with <br />FEDERAL HIGHWAY ADMINISTRATION <br /> <br />.., , <br /> <br /> <br />./ <br /> <br />'- <br /> <br />ROCK RIPRAP <br /> <br />CHANNEL BED <br /> <br />Mound of displaced riprap <br /> <br />PARTICLE EROSION <br /> <br />-- <br />