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<br />Methods For Controlling Erosion <br /> <br />e <br /> <br />While nc distinct advantage is offered by concrete rubble in tenns of its structural <br />integrity, it is less expensive than stone. Costs for rubble revetments are typically about <br />one-half that of stone revetments. in areas where stone riprap is SCMCe. <br /> <br />FIGURE 4. 5 <br /> <br />Concrete mattresses <br /> <br />Corrosion Resistant <br />Wire <br /> <br />~ <br /> <br />Concrete <br />Mattresses <br /> <br /> <br />N.W.S. <br /> <br />d <br /> <br />Concrete Pavement - Concrete pavement, displayed in Figure 4 - 6, is not recommended <br />for naturiII alluvial channels. Prohibitive costs, environmental considerations and <br />structural integrity should eliminate this alternative for most projects. However, on <br />man-mad,~ channels or in rare instances on natural channels where gentle slopes may be <br />used. it c:m function wen. The most critical element to a successful implementation of <br />paving is to establish a stable foundation that is wen drained. <br /> <br />FIGURE 4.6 <br /> <br />Concrete pavement <br /> <br />Concrete Layer <br /> <br /> <br />=~~ <br /> <br />N.W.S. <br /> <br />r ~ <br />~M' <br /> <br />Scour uncler the slab from flow turbulence or inadequate subsurface drainage may be a <br />problem. Pavement can be aesthetically unp1easant as wen as environmentally <br />unaccept:ible. In addition, the process is relatively expensive with considerable attention <br /> <br />e <br /> <br />32 <br /> <br />Colorado Erosion Control Manual <br />