Laserfiche WebLink
operation. If it is assumed that the SDP is decommissioned, then all impacted water could be <br /> conveyed in the ESP and the TDL could be removed. <br /> G-3.3.2 Figure G-06: Overburden Storage Area <br /> A. Mine Haul Roads <br /> The mine haul roads, primarily located on the west face of Bartlett Mountain, would be regraded if <br /> necessary for closure water management. <br /> B. McNulty and North 40 OSF's <br /> In accordance with the 2017 Golderdesign,the surface of the McNulty OSF and North 40 OSFwould <br /> be graded to approximately 2.5:1 slopes and capped/reclaimed. Surface runoff from the area would <br /> be collected in channels and routed to the East Side Channel. A subdrain system would be needed <br /> to collect impacted seepage from the facility. The impacted water from this system would be <br /> conveyed to the East Side Pipeline. <br /> Fresh water intercepted from above the McNulty OSF would be conveyed by open channel to the <br /> East Interceptor or the ESC. <br /> G-3.3.3 Figure G-07: Robinson Lake Area (Eagle River Basin) <br /> A. Robinson Lake <br /> Robinson Lake is assumed to be converted to a clean water reservoir, similar to Eagle Park <br /> Reservoir. Impacted sludge and sediment will be removed from the reservoir. <br /> A seepage barrierwill be constructed to prevent inflow of impacted 1 Dam seepage. There would be <br /> an area upstream of the seepage barrier for emergency storage of impacted water. A second <br /> seepage barrier is required near the south end of 1 Dam, as shown on Figure G-07. <br /> B. Robinson Dam <br /> It is assumed that there would continue to be impacted seepage from Robinson Dam, although it is <br /> expected to eventually be clean. A new pipeline would be required to convey this seepage from the <br /> existing collection/pump system to Warren's Pump Station. <br /> C. Eagle Park Dam <br /> It is assumed that Eagle Park Dam seepage will eventually be clean enough to release to the East <br /> Fork Eagle River. However, the existing conveyance pipeline from the dam to Warren's Pump <br /> Station is shown on Figure G-07. This would involve a minor modification to the existing discharge <br /> pipeline and could be combined with the Robinson Dam seepage pipeline. <br /> D. 1 Dam <br /> It is assumed that 1 Dam will continue to generate impacted seepage for an extended period of time <br /> post closure. Therefore,the existing seepage collection system and Warren's Pump System would <br /> continue to be required at closure. <br /> Conceptual dam face interceptors are shown on Figure G-07. These open channels would intercept <br /> clean surface water runoff from the face of the dam and convey it around the seepage collection <br /> system. <br /> E. It is assumed that the Chalk Mountain Interceptor will continue to operate along Robinson TSF. It is <br /> shown on the figure discharging into Chalk Mountain Reservoir, which would spill into Robinson <br /> Lake. Alternatively, the existing lower portion of the interceptor could continue to be used if <br /> necessary. <br /> F. It is assumed that the original Tenmile Tunnel (south) will be decommissioned and plugged. <br /> Exhibit G G-12 May 2024 <br />