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<br />' S =Slope of Channel in feet per feet <br />' A woven filter fabric may be installed under the loose rock check dams to improve stability and <br />function. Sediments will be removed behind loose rock check dams when they equal or exceed <br />one-half of the dam height. Loose rock check dams will be left in place in reconstnrcted <br />drainage channels. It will not be necessary to clean out loose rock check dams used in <br />reconstructed drainage channels on reclaimed areas. <br />1 <br />1 <br /> <br /> <br /> <br />1 <br />1 <br />1 <br />1 <br />1 <br /> <br />t <br />1 <br />1 <br />' B-4 <br />