2024-05-17_REVISION - M1977493 (4)

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■ 1 Dam Seepage ■ 3 Dam Seepage ■ 4 Dam Seepage (Eagle Park Reservoir) ■ 5 Dam Seepage ■ Tenmile Tunnel Seepage ■ Mayflower Tunnel Seepage Impacted water is used in the mill water circuit, which reduces the annual volume of impacted water that is treated and discharged from the site. The additional tailing deposition in Mayflower TSF has resulted in a minor increase of seepage flows at the toe of 5 Dam. This is expected to continue as 5 Dam increases in height. Also, as the aerial extent of the overburden storage facilities increases,the generation of additional impacted seepage from these facilities is expected. These seepage flows require collection and treatment, similar to other impacted waters at the site. G-2.8 Process Water Handling Systems As shown on Figure G-01, an extensive system of process water collection, conveyance, and treatment facilities have been developed at the Climax Mine. The purpose of these facilities is to provide for compliance with NPDES discharge permit requirements. A schematic representation of the system is shown on Figure G- 02. The following paragraphs provide a brief description of the process water handling systems currently in operation at the site. G-2.8.1 5-Shaft Pump System The 5-Shaft Pump System consists of a pump station that withdraws impacted water from the underground mine and a pipeline that conveys this water to the Tenmile Creek basin for use in the process water circuit or for treatment and discharge. The 5-Shaft Pump System is operated to maintain underground water levels well below the level of the apex of the Mosquito Fault, which provides a barrier to underground flow. The pump system is used to control water in the open pit. As the pit depth increases,the set level of the 5-Shaft pumps are lowered. G-2.8.2 Storke Wastewater Pump System The Storke Wastewater Pump System consists of a seepage collection system in the Storke Area, a pump station and a pipeline that conveys impacted water from the Storke Area to the Tenmile Creek basin for use in the mill water circuit or for treatment and discharge. G-2.8.3 4 Dam Seepwater Pump System The 4 Dam Seepwater Pump System consists of a seepage collection system at the toe of 4 Dam (Eagle Park Dam), a pump station and a pipeline that conveys this water to Robinson Lake. G-2.8.4 Robinson Lake Seepwater Pump System The Robinson Lake Seepwater Pump System consists of a seepage collection system near the toe of Robinson Dam, a pump station and a pipeline that conveys this water to Robinson Lake. G-2.8.5 Warren's Pump System The Warren's Pump System consists of a seepage collection system along the toe of 1 Dam, a pump station and a pipeline that conveys this water to the Tenmile Creek basin for use in the mill water circuit or for treatment and discharge. Exhibit G G-6 May 2024