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(.. <br />• <br />• <br />fps, therefore. rock riprap (D50 9.5 inches) will be installed in <br />Section D to prevent erosion. The riprap will be placed to an <br />approximate depth of 20 inches along the channel bottom and sideslopes. <br />Appropriate bedding material will be placed and spread prior to riprap <br />placement. <br />Design details and channel characteristics for each channel section are <br />summarized Dy Figure 3, Design Detail - Refuse Collection Ditches. <br />-16- <br />