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<br />genera I pub' lei ntere:;t I for the! accomp II shment of certa I n works on or adjacent to <br />navigable waters of the United States. <br /> <br />Pi Ie. An elongated member. usually made of timber, concrete~ or steel~ that serves as a <br />structural component cf a river training structure. <br /> <br />Revetment. Armor of eros I01-res I stant mater I a I des Igned to protect a strei:lmbank. <br /> <br />River Tralnlnq Structure. Any configuration constructed in a stream or placed on, <br />adjacent to, or in lhe vicinity of a streambank, which Is intended to deflect <br />currents, induce sedinent deposition, Induce scour, or In some other" way alter the <br />velocity regimen of th.~ stream. <br /> <br />Specifications. <br />materlals~ <br /> <br />A detafjed description of particulars, such as size of s~.one, quality of <br />contractor r)erformance, terms, qua I ity contro I, etc. <br /> <br />Stone R I prap. <br />5 treambank <br /> <br />Natural ccbbles~ <br />or f il ter a:; armor <br /> <br />boulders, or broken <br />against erosion. <br /> <br />stones <br /> <br />dumped <br /> <br />or p laced on a <br /> <br />Toe. That portion of a stream cross-section where the lower bank terminates and the <br />channel bottom or the opposite lower bank begins. <br /> <br />Trench-F III Revetment. Storie, concrete, or <br />and parallel to an ero<ling streambank. <br />the trench, the materj,,, placed in the <br /> <br />ceramic material placed In a tr'ench dug behind <br />When the erosive action of the stream reaches <br />trench retards further erosion. <br /> <br />Upper Bank. That portion 01 a streambank having an elevation greater than the mean water <br />level of the stream. <br /> <br />Veqetatlon. Woody or nonwocdy plants used to stabl I Ize a stream bank and retard erosion. <br /> <br />32 <br /> <br />{I:u. S. GOVERNMENT PRINTING OFFIC" 1980-652-712 <br />