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SECTION 3.0 2023 Drainage Reconstruction, Improvement and <br /> Repairs at Trapper Mine <br /> 3.1 Drainage Reconstruction 1987-2023 <br /> At Trapper Mine, all or portions of nine major drainageways (Coyote, Johnson, Buzzard, No-Name, Oak, <br /> Grouse, Horse, Flume and Pyeatt) and their tributaries have been regraded and appropriately treated to <br /> reduce the erosion rate and assist in permanent channel stabilization from 1987 through 2023. At the <br /> conclusion of the 2023 field season, approximately 147,630 linear feet (27.96 miles) of permanent <br /> drainage reconstruction has been completed at Trapper Mine (Map 1). In 2023 5,760 feet of new <br /> drainage reconstruction occurred in the D-Pit area, main tributary to No-Name Gulch. <br /> 3.2 Drainage Improvements and Repairs <br /> Improvements and repairs were performed to provide benefits to all drainages treated in 1987- <br /> 2023 as well as portions of undisturbed and disturbed drainage segments. Drainage <br /> improvements include dozer basins constructed in newly stripped topsoil areas and on newly <br /> regraded spoils. Dozer basins and/or stock ponds were cleaned and repaired in Johnson, <br /> East Pyeatt, Oak, Middle Flume, East Middle Flume and Deal drainages in 2023. Sediment <br /> ponds Middle Pyeatt#1 and East Pyeatt#1 were cleaned of all sediment and Johnson #10 <br /> was partially cleaned and aquatic vegetation removed in 2023. New Sediment ponds East <br /> Buzzard #3 and West Buzzard#4 were constructed in the northwest corner of the permit area <br /> during the summer of 2023. They are designed to treat and capture sediment from the <br /> proposed mining areas in C Pit. Repairs of 9,170 feet of drainage were conducted in the L/K <br /> Pit and the F Pit reclamation areas due to deep rills. <br /> 3.3 Drainage Reconstruction Design Summary <br /> Design criteria established with PR-07 shall be summarized for each year for the drainages <br /> reconstructed on the site. Table 3.1 shows the model inputs for each drainage designed and <br /> reconstructed for the reporting year. Map 1 indicates each drainage section reconstructed during the <br /> reporting year. In 2023 5,760 feet of new drainage reconstruction occurred in the D-Pit area, main <br /> tributary to No-Name Gulch. <br /> GCR 2/24 <br /> [DRMS23RPT\23 Drainage Repair text 3-0] <br />