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SECTION 3.0 2004 Drainage Reconstruction, Improvement and <br />Repairs at Trapper Mine. <br />3.1 Drainage Reconstruction 1987-2004 <br />At Trapper Mine, all or portions of six major drainageways (Coyote, Johnson, Buzzard, No-Name, <br />Flume and Pyeatt) and their tributaries have been regraded and appropriately treated to reduce the <br />erosion rate and assist in pernanerrt channel stabilization from 1987 through 2004. At the conclusion <br />of the 2004 field season, approximately 86,500 linear feet (16.38 miles) of permanent drainage <br />reconstruction had been completed at Trapper Mine (Map 1). In 2004, approximately 2,516 linear feet <br />of permanent drainage reconstruction was completed. Rock stnrctures were installed at an <br />approximate frequency of every 75 feet throughout the reconstnrded drainage on Flintlock Pit regrade <br />in 2004. <br />3.2 Drainage Improvements and Repairs <br />Improvements and repairs were peuforned to provide benefits to all drainages treated in 1987-2004 as <br />well as portions of undisturbed and disturbed drainage segments. Drainage improvements include <br />dozer basins constnrded in newly stripped topsoil areas and on newly regraded spoils. Drainage repair <br />and enhancement was completed on approximately 3,500 linear feet of drainageways (No-Name, <br />Pyeatt, Flume and Oak drainages) during the 2004 field season. <br />LJ <br />w~ sins <br />pnnwhep»IDROmM1i.t7 <br />• <br />