2015-01-12_REVISION - M1985112 (7)

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EXHIBIT G WATER INFORMATION The Loloff Pit mine permit amendment will increase the exposed groundwater during the mining operations. The operator has currently posted a financial warranty for the reclamation costs and has an agreement with the State to post a financial warranty for the amended mine permit with the proposed slurry wall construction. The groundwater impacts and the discharge capacities were evaluated for the Loloff Pit Permit M-1985-112 Technical Revision No. 1 (TR-01). There are no additional wells impacted than have been addressed with the TR-01 and field evaluation has not located any new or undocumented structures. The groundwater is currently being collected by de-watering trenches and the increased area of mining will not increase the total volume of water reporting to the pit. This conclusion is made on the fact the slope area of the proposed mine plan is nearly the same as the slope area under the current approved mine plan. With this, it is anticipated that there will not be a significant change in the discharge rate required for the current mining operations. Other than the ground water,there are no other water sources that will be affected with this amendment and the ground water impacts are currently being mitigated with a substitute supply plan. Attached for your review is a copy of the Loloff Substitute Supply Plan (WDID 0302524). De-watering of the pit currently occurs at the southeast corner of the pit and discharges into a drainage ditch that conveys the water to the river. Any potential increase in groundwater flow to this discharge point is not a significant amount relative to the amount of de-watering required currently. The discharge ditch was evaluated as part of the TR-01 for the Loloff Pit. There is currently an NPDES permit on file numbered COG-500375 and is permitted for an estimated average discharge rate of 3 million gallons per day(MGD).