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• <br />~J <br />• <br />CULVERT AND DITCH SPECIFICATION SUMMARY <br />MINIMUM SIZE TO HANDLE DESIGN FLOW <br />Item Material Size <br />Culvert 1 ADS 12" Diameter <br /> 2 CMP 18" Diameter <br /> 3 CMP/Steel 8" Diameter* <br /> 4 ADS/CMP 24" Diameter <br /> 5 CMP 18" Diameter <br />Ditch A Earth Trapezoidal Channel <br /> 1'- Bottom Width <br /> 1.5' Deep with freeboard <br /> 2h:ly Side Slopes <br />Ditch B Earth Triangular Channel V-Ditch <br /> 1.4' Deep with freeboard <br /> 2h:ly Side Slopes <br />Mine Be nch Earth Triangular Channel V-Ditch <br />Access Road 1.2' Deep with freeboard <br />Segment 1 & Segment 2 1.Sh:ly Side Slopes <br />ADS = Advanced Drainage Systems "Plastic" Corrugated Pipe <br />CMP = Corrugated Metal Pipe <br />* By the end of April 1994, Culvert 3 will be replaced by a <br />12-inch diameter steel or cmp pipe. <br />11-8 <br />Rev. 02-15-94 <br />