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• <br />SEDCAD 4.0 <br />Copyright 1998 Pamela J. Schwab <br />Civil Sofhvara Design <br />DITCH D3 (Lowery <br />Material: Riprap <br />• <br /> <br />SEDCAD Utility Run <br />Printed OS-03-20 DO <br />Trapezoidal Channel <br />PADER Method -Steep Slope Design <br />