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References Cited <br />D.C.A. D.C.A. Engineering Sohware, Inc. 1989. P.O. Sox 955, Henniker, NH 03242 <br />P.D.S. Peabody Coal Company, 1300 :i. Yale, Flagstaff, AZ 86001 <br />SEDCAD 4, SEDIMOT II. 1998 Civil Sohware Design, P.O. Box 11092, Lexington, KY 40512 <br />~1 <br />L_J <br />1 <br />• <br />12 Revised 2/99 <br />