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M-1977-410 <br />Technical Revision 10 <br />April 26, 2022 <br />19 <br /> <br /> <br /> <br /> <br />Surface Water and Groundwater Monitoring Plans: <br /> <br />A revised Groundwater Monitoring Plan is provided in Appendix G. The revised plan revises the previously <br />submitted interpretation and indicates that: the suggested Junction Ranch fault down-gradient from the <br />mine does not appear to exist at the mines based on drilling. Water flow and storage between the Cross <br />and Caribou mine is also influenced by the unmapped Potosi Mine between the Cross and Idaho tunnel. <br />Resistivity surveys conducted last summer show extensive stopping created massive voids that fill from <br />snow melt as access shafts are still open. This makes the fracture flow regime more complicated than <br />simply citing a divide between the two mines and Coon Track Creek <br />A Surface Water Monitoring Plan is provided in Appendix H. The Plan. The SMP addresses Hydrology and <br />Water Quality of the prevailing hydrologic balance of the GIR permitted. The site consists of a Historic <br />Mining District and, therefore, the surface facilities have existed for decades. Characterization data will <br />be obtained from ambient surface water along Coon Track Creek which traverses the site and constitutes <br />the only surface water outfall from the currently active operations area in the property and it is <br />anticipated that the collected information will be used as Baseline Water Quality conditions for the site. <br />Two Sample Points labelled 2022-01 and 2022-02 were agreed upon with DRMS, the first sample point is <br />located upstream of the facilities and second sample point is located downstream of the facility. The upper <br />watershed from the top of the divide to Sample Point 2022-01 comprises 0.54 square mile basin, and, <br />from Sample Point 2022-01 downstream to Sample Point 2022-02 the watershed has an area of 0.79 <br />square miles (i.e., an additional 0.25 square mile basin over sample point 2022-01). <br />The locations of Water Quality Sampling Points for Groundwater (wells) and Surface Water are <br />provided on the following Figure 2. <br />