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f. III I II I II I II IIII III Doc Date:1211112001 <br />SECTION 3.0 Drainage Reconstruction, Improvement and <br />• Repairs at Trapper Mine in 1999. <br />3.1 Drainage Reconstruction 1987-99 <br />At Trapper Mine, all or portions of five major drainageways (Coyote, Johnson, Buzzard, No-Name and <br />Pyeatt) and their tributaries have been regraded and appropriately treated to reduce the erosion rate and <br />assist in permanent channel stabilization from 1987 through 1999. At the conclusion of the 1999 field <br />season, approximately 73,020 linear feet (13.83 miles) of permanent drainage reconstruction had been <br />completed at Trapper Mine (see Map(s) 3). In 1999 there was 5,850 linear feet of permanent drainage <br />reconstruction completed. Rock structures were installed at an average frequency of every 100 feet <br />throughout the reconstructed Pyeatt and No-Name drainages in 1999. <br />3.2 Drainage improvements and Repairs <br />Improvements and repairs were performed to provide benefits to all drainage's treated in 1987-1998, as <br />well as portions of undisturbed and disturbed drainage segments. Drainage improvements include dozer <br />basins constructed in newly stripped topsoil areas and on newly regraded spoils. Drainage repair and <br />enhancement was completed on approximately 2,000 linear feet of East Pyeatt, West Pyeatt, Johnson, <br />No-Name, East Buzzard, Oak and Coyote drainageways during the 1999 field season. <br />• <br />sow aao <br />~i <br />C <br />