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Response to DRMS Adequacy Review #2 — Cotter JD -8 Mine Reclamation Plan Amendment Exploration drill hole 79 -303, located 102 feet north of the proposed monitoring well location, was drilled to 680 feet and logged as dry. 8) Figure 4, Location of cross - sectionals for water levels and drill holes, shows three cross - sectionals across future mining areas. Please provide a cross - sectional D -D' in the general area of holes 77 -108 to 84 -8 across the area to be developed first beyond current workings. Cotter response: A cross section in the general vicinity of holes 77 -108 to 84 -8 is provided in Attachment 4. This cross - section was originally prepared by Cotter geologists in 1988 using information obtained from the surface exploration efforts conducted previously by Cotter in this area. The cross section is referred to by its original identification, El -E1', and extends from drill hole 84 -14 to drill hole 84 -1. Tim Cazier, Division Engineer: Review and Comments on Cotter Response to Adequacy Review, Attachment 4 /Attachment A Drainage Design Plan prepared by Whetstone Associates (dated March 25, 2012) General Comments: 1. It appears the labels on Figures 1 and 2 are reversed. Beginning on page 1, references are made to six drainage areas shown on Figure 2, labeled 1 through 6, as indicated in Table 1. These six drainage areas appear to be on Figure 1, not Figure 2. Page 2 appears to correctly reference Figure 2 for drainage areas N -A through N -F. However, the figure references appear to be reversed in the remainder of the drainage plan. For example, on page 9 it refers to Retention Pond 2 (Zone 6 in Figure 2). These are both on Figure 1. Please correct the figure numbers and/or the references in the text to correctly refer to the appropriate figures. Cotter response: The figure numbers and references have been corrected in the revised Drainage Design Plan, which is provided in Attachment 5. 2. Three separate terms are used interchangeably to "label" the 12 different areas from which runoff is contributed: zone, area/drainage area, and catchment. Please use consistent nomenclature in the text and figure labels. Typical nomenclature is either sub - basin or sub - catchment. Cotter response: The terms "catchment" and "drainage area" have been replaced with the term "sub- basin" throughout the revised Drainage Design Plan. 3. Figure 3: Page 13 refers to Areas 1 and 4 on Figure 3. Neither Area 1 nor Area 4 appears to be delineated or labeled on Figure 3. Please delineate and label in a manner consistent with the text. Cotter response: Areas have been delineated and labeled as requested in the revised Drainage Design Plan, which is provided in Attachment 5. Page 5