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Golden Wonder Mine <br />DBMS Mine Permit No M-1978-091 <br />Storm Water Management Plan <br />maclinery and vehicles have been removed. There are no structures or storage <br />facilities located on the Level 3 pad. <br />• Leve16 will be the active level of the mine. There are mine activity related <br />vehicles (1 loader, 1 haul truck), buildings (3 temporary structures) and <br />machinery (1 primary crusher) located outside on the Level 6 pad. The <br />materials underground are contained and do not create a pollutant issue for the <br />outside setting. The materials, buildings and machinery outside may yield <br />petroleum pollutants from fuel leaks and usage, and small-scale machinery <br />Iubricants as part of machinery maintenance. The waste rock can also be <br />viewed as a potential source of pollutants if water comes into contact with it <br />and creates flows containing ARD character. In regards to the petroleum <br />constituents and solvents, there have been no significant spills or sign of <br />release. There are no fuel tanks on the Level 6 pad. The entire pad footprint is <br />encompassed by a perimeter berm and contoured to slope towards to the toe of <br />the excavated slope. Any spilled materials would be contained within the pad <br />setting and not reach any of£-azea setting. In addition, the majority of fluids <br />are kept within the on-site temporary structures which provide an added layer <br />of spill prevention. There is no sign of stormwater erosion or release from the <br />pad. It appears that current management practices are sufficient to contain <br />and/or manage any stormwater that might occur. As previously stated, as a <br />conservative measure, monitoring will be conducted during the spring-melt <br />conditions to detemune the need for additional management practices. <br />Sediment created from stormwater flows is the most likely pollutant associated with <br />the mine. Sediment can be produced from uncontrolled stormwater eroding <br />scoured/exposed working surfaces such as the access road and pad. However, due to <br />the presence of existing management practices there is little to no evidence of any <br />sediment release to off-areas. There is one erosion channel that has been created as a <br />result of the access road acting as a conduit for stormwater. However, as stated in the <br />introduction to this Section, we propose to monitor the need for any additional <br />management features to control this issue. It appears that existing management <br />practices such as the revegetated perimeter berms, are holding sediment in place. In <br />addition, the natural setting (porous slope, low snow accumulation) ]ends to <br />controlling the amount of stormwater potential. These combined attributes appear to <br />be controlling sediment releases from the mine. <br />i. stormwater Diversions <br />The following subsection describes the various stormwater diversions <br />currently in-place and proposed for the Level 6 portion of the mine <br />(includes the access road and pad). As described (and previously document <br />