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~~~ <br />_iiiiu~uiiniiim <br />999 <br />D <br />~ SECTION 3.0 Drainage Reconstruction, Improvement and oc Date.1211112001 <br />Repairs at Trapper Mine in 1996. <br />3.1 Drainage Reconstruction 1987-96 <br />At Trapper Mine, all or portions of five major drainageways (Coyote, Johnson, Buzzard, No-Name and <br />Pyeari) and their tributaries have been regraded and appropriately treated to reduce the erosion rate <br />and assist in permanent channel stabilization from 1987 through 1998. At the contusion of the 1996 <br />fiekt season, approximately 56,850 linear feet (10.77 miles) of permanent drainage reconstruction had <br />been completed at Trapper Mine (see attached "Drainage Reconstruction" map). Drainage reconstruo- <br />tion totaling 2,500 linear feet was successfully completed in East Pyeatt and West Pyeatt drainages in <br />1998. Rock structures were installed at an average frequency of every 100 feet throughout the recon- <br />structed Pyeari drainages in'1998,~ Brush hauled from the topsoil pre-strip area was used in fortifying <br />the drainage areas between the rock structures. <br />3.2 Drainage Improvements and Repairs <br />Drainage improvements and repairs were performed to provide benefits to all drainages treated in 1987- <br />1998, as well as portions of undisturbed and disturbed drainage segments, Drainage improvements <br />inctude dozer basins constructed in newly stripped topsoil areas and on newly regraded spoils. <br />Drainage repair and enhancement was conducted on approximately 1,000 feet of East Pyeatt <br />drainageway. <br />.~ <br />eor+a~s~ <br />~oaa+mawrn <br />~_~ <br />