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Golden Wonder Mine <br />DRMS Mine Permit No M-1978-091 <br />Storm Water Management Plan <br />and managed in order to prevent a hydrologic connectivity to Deadman Gulch along the <br />south side. <br />Deadman's Gulch is an intermittent tributary to the Lake Fork of the Gunnison River. <br />Flows occur haphazardly for about two months during spring melt. These flows have <br />never demonstrated a direct connectivity to the Lake Fork of the Gunnison as they <br />dissipate into alluvium adjacent to a crossing with Colorado Highway 149. <br />3. Site Map(s) <br />Three site maps are included with this SWMP; Figure 1 depicts a conceptual diagram of <br />the Level 3 portion of the mine, Figure 2 depicts a conceptual diagram of Leve] 6 and <br />Figure 3 provides an aerial photo with the vazious stormwater best management practices <br />planned for the mine. <br />No runoff has been observed with Level 3, however stormwater activity will be <br />monitored to determine the need for any management enhancements to'address any <br />potential flows routed from up-slope areas on to the access road (and ultimately on to the <br />Leve13 pad) If stormwater is found to be causing erosional issues and sedimentation, a <br />run-on channel with an associated stormwater culvert and riprap baffle will be planned. <br />These features will control any run-onto this portion of the mine thereby affectively <br />eliminating any runoff as well. <br />Level 6 is the current active portion of the mine and may require maintenance and <br />updating of the existing management practices. The access road shows signs of <br />stormwater erosion and the Leve16 pad needs to proactively control stormwater <br />infiltration in order to control any acid rock drainage through the waste rock. Several <br />best management practices are already in place, however monitoring of stormwater <br />management will be completed to determine if additional management practices are <br />needed. <br />4. Stormwater Management Controls <br />Various stormwater management controls have been in place for a number of years since <br />the implementation of the first CDPS stormwater permit (May 2, 1997: Colorado <br />Discharge Permit System -Stormwater Certification No. COR-040199). We intend to <br />upgrade these management practices during the 2007 mining season (approximately May <br />to June, 2007) if needed. There are visible signs of stormwater erosion along the Level 6 <br />access road, and the potential for acid rock drainage at the toe of the Level 6 waste rock <br />pile due to stormwater communication with the waste rock materials. The current <br />operator (Au Mining) has taken steps to address these issues (routing of Mows into a <br />