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<br />Roek end Brush Revetment <br /> <br />Roek and brush mat revetments ean be used to control stream bank erosion i~ <br />most areas where rock riprap Can be used. There .re two conditions when t,is <br />practice would not be recommended, The first is on a sharp curve, The second <br />is on reache. with large flow. and a high velocit:', The bank i. sloped bac:'- <br />to a .lope not .teeper than 1,5 horizontal to I vertical, ~ rock toe is <br />placed at the botto," of the slope to protect the '>ank from undercuttin$. <br />Brush is then laid with the butt ends up the slope and transverse to the <br />stream bank, The brush is anChored in place with wire and .takes, If the ,.c <br />does not extend to the top of the bank, the unprotected area should be seeded.. <br /> <br />.\ variation to this practice 1, to use all lI_dled brusb or willow.. <br />would not be reco~nended on channels with hi;h flow velocities. The <br />would replace the rack in the toe and bottom part of the .lope, <br /> <br />This <br />bt"Js':1 <br /> <br />It is recommended to use live brush for the above practices, If live brush is <br />used, loose dirt should be placed over or around the bundled brush, This w..l <br />enable more of the b"ush to sp"out faster and Eon, vegetative protection Ear. <br />the bank. <br /> <br />These practices should be maintained by in.pectin!: the wi"e anchou a<ld the <br />"ock toe. ~ny wires which have been pulled loose should be repaired. 1rush <br />or rock which has been di.lodged should be "eplac..d. <br /> <br />60 <br />