2018-05-18_REVISION - C1981010 (2)

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And associated revised pages, 4-184, 4-24; tables: 4.8-7, 4.8.8b, 4.8-11; and maps. DRMS possesses the following questions regarding tables: Table 4.8-7 pages 2 and 3: DRMS noted that the diameter measurements were omitted for East Pyeatt #1 and East Pyeatt #3 ponds. Having clarified this change on the phone with Mr. Roberts stating that the drop outlets/decant systems had been removed from these ponds; DRMS finds that acceptable. TMI states that elevations are based on current topographic information obtained from aerial photographs. DRMS understands that TMI performs detailed elevation measurements utilizing drone technology on an annual basis at Trapper mine. DRMS notes differences in stage height for Horse 1 and East Middle Flume ponds. 8. Please discuss these differences with a short explanation of how the new measurement was arrived at. 9. DRMS notes negative freeboard values for Middle Pyeatt #1 and #3 ponds. As the Middle Pyeatt system is projected to take runoff and possibly mine water from the development of N pit please discuss this situation. Overall DRMS found the as builts illegible, without adequate topo for bottom of ponds. The designs were therefore difficult to adequately review. Please see adequacy questions apropos to Rule 2.05.3(4) below. Rule: 2.04.7 (3)(4) Hydrology: Alternative Water Suimly The above rule is adequately addressed. Rule: 2.04.9 (1) - (3) Soils The above rule is adequately addressed. Rule: 2.04.10 (1) - (5) Vegetation Information The cover letter submitted with the revised pages states that Trapper is proposing to modify the shrub density standard to include a 700 stems/acre alternative standard. 10. Please insert a discussion of this alternate standard on page 4-101 where success standards are outlined. Rule: 2.04.11 (1) - (4) Fish and Wildlife The above rule is adequately addressed. Trapper PR9 Preliminary Adequacy Prepared by: R. Reilley, GISP, M.S. Page 4 Date: May 2018