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Mr. Wayland <br />Page 14 <br />October 27, 2015 <br />b) Percentage of gravel (material retained on a No. 4 sieve should not exceed 10%). <br />c) Stones and rocks (no rocks larger than 2 inches should be in the liner material). <br />16. Please commit to notifying the Division when the reservoir slopes have been reclaimed to <br />their final grade, but prior to filling the reservoir with water. Upon notification from the <br />Operator, the Division will schedule an inspection to verify the pit slopes have been <br />reclaimed to the approved grade. <br />6.4.6 Exhibit G — Water Information <br />17. The Applicant has committed to installing a sub -surface drain around Reservoir #2. The <br />installation of the subsurface drain was based on the findings of a ground water monitoring <br />study conducted by McLaughlin Water Engineers. Please specify if a sub -surface drain will <br />be installed around Reservoir #4. In addition, clarify if the potential impacts to ground water <br />elevations were studied for Reservoir #4. Provide the findings of any ground water study <br />including any modeling results, or provide an explanation as to why the potential impacts to <br />ground water have not been analyzed in regard to lining Reservoir #4. <br />18. During review of the original 112 Construction Materials Reclamation Permit application, <br />the Operator committed to following a groundwater monitoring and mitigation plan. The <br />groundwater monitoring plan contained specific language regarding the installation of a <br />slurry wall. The Division requests the Operator provide a revised commitment with all <br />references to the construction of a slurry wall replaced by the construction of a clay liner. In <br />addition, the Operator shall affirm the mitigation measures will continue to apply regardless <br />of whether the mitigation triggers are the result of installing a clay liner on Reservoir #2 or <br />Reservoir #4. <br />19. In the original application, the Operator identified all wells within 700 feet of the proposed <br />permit boundary (see Exhibit S). Please verify that the list of wells is complete and accurate <br />and ensure that there were no new wells constructed since the original permit was approved. <br />If new wells have been constructed within 700 feet of the permit boundary, then the Operator <br />shall provide a revised list of wells and a map showing the location of the wells in relation to <br />the permit boundary. <br />20. The original Mining Plan stated that Reservoir #2 would be dewatered and pumped into one <br />of the existing on-site reservoirs. The applicant has indicated that water from dewatering <br />operations will be delivered to a settling pond impoundment. Exhibit C-2 Mine Plan Map <br />(Sheet 2) shows there are three sediment ponds located in the materials processing area. <br />Please provide additional detail regarding water management at the site, including how the <br />water is delivered to the sediment ponds and how it is routed through the sediment ponds. In <br />addition, specify if water is discharged from the site and identify the discharge location and <br />the receiving body of water. <br />