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<br />NOTES: Felled trees, found along the adjacent bank, can be laid butt upstream. parallel <br />to and against the toe of eroding bank, and anchored to stumps or trees wIth used cable. <br />This wI II tend to build up a foreshore by causing the current to slow down and drop part <br />of Its silt load. This Is a relatively Inexpensive method. <br /> <br />COSTS: $1,500/tree, Including stone fll I and deadman anchors. Assuming 75-foot spacing, <br />cost equals $20/bank-foot. <br /> <br />MAINTENANCE REQUIREMENTS: Replacement of trees or rearrangement of moved trees. <br /> <br />ENVIRONMENTAL ASPECT: This technique consists of anchoring of trees perpendicular to the <br />riverbank. The branches of the tree rest on the riverbed. The trees protect the eroding <br />bank by slowing the current and accumulating debris. This technique Is more natural In <br />that it simulates the natural occurrence of undercut trees fal ling Into the stream. The <br />bankline receives on,ly minor disturbances, and the trees provIde fish habitat. Although <br />some trees are lost for bank protectIon, this erosion control method is the most <br />environmentally acceptable as it is harmonious with the flood plain landscape, and <br />attempts to reproduce a natural phenomenon. <br /> <br />20 <br />