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grades using this method, the median riprap size would be increased somewhat as a safety measure to <br />ensure a stable channel. <br />In some cases, as a practical consideration, a group of channels has been designed using a single <br />minimum riprap size. That size will in all cases be as large or larger than the size determined in the <br />SEDCAD analysis for each individual ditch, and will thus result in a more conservative design for some <br />of the ditches in the group. <br />6.0 REFERENCES <br />Agricultural Handbook No. 703, "Predicting Soil Erosion by Water: A Guide to Conservation Planning <br />with the Revised Universal Soil Loss Equation (RUSLE) ", U.S. Department of Agriculture, Agricultural <br />Research Service, July 1996, 404 pp. <br />Barfield, Warner, & Haan (1981). "Applied Hydrology and Sedimentology for Disturbed Areas". <br />Oklahoma Technical Press, Stillwater, OK. <br />Haan, C.T., Barfield, B.J., and Hayes, J.C., 1994, 1981. "Design Hydrology and Sedimentology for Small <br />Catchments ". Academic Press — Harcourt Brace & Company, San Diego. <br />Schwab and Warner (1998). "SEDCAD4 Users Manual'. Civil Software Design. Lexington, KY. <br />Natural Resources Conservation Service (1986). "Urban Hydrology for Small Watersheds (TR -.55) ". Soil <br />Conservation Service. Washington, DC. <br />Exh. 7 -23 -7 Revision Date: 3/25/11 <br />Revision No.: PR -03 <br />