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Doc Date:1211112001 III IIIIIIIIIIIII III <br />• <br />SECTION 4 <br />Drainage and Sediment Control Calculations for Hubbard Canyon <br />Ventilation Facilitates <br />(Designed by M. O. Anderson in 1981, revised in 1994 and ~ertiGed by James Stover) <br />r1 <br /> <br />