2024-04-25_PERMIT FILE - M2024017

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well below mining. The nearest well (29060) is 321 feet deep with a static water level 90-ft deep, starting at a collar elevation of 7390' above sea level. The lowest point of mining is in East Pod at 7420' elevation, which is 30-feet above the collar elevation of the wells. If any groundwater is encountered during mining, it will be covered, and the mining depth will be adjusted to two feet above the level it is found. Table G-3 below the nearest well to the permit boundary. Table G-3 Wells within 600'of Permit Area Well ID I Distance to Well Depth Notes Mining(ft) (ft)* 29060 750 321 W L=90-ft 8. Water Related Permits The operator has already obtained the necessary permits regarding water for the operation. These permits are listed below. Some amendments may be required for these permits. Copies of any new permits will be provided to the Division after they have been acquired. • Stormwater Management Plan (will be modified following approval of this amendment) • Colorado Department of Public Health and Environment (CDPHE) Stormwater Discharge Permit (currently in place, will be modified to add outfalls at new pits) 8.1 . Water Rights No water rights are necessary for the operations at the Lockhart Pit. Mining should not impact any existing water rights as groundwater will not be interacted with. Water will be purchased as needed to supply operation needs such as dust control. 9. Water Consumption and Source The primary consumptive water use for the Lockhart Pit is for dust control. Water for this use will be bought from a local supplier and trucked on site. Table G-6 summarizes the estimated water consumption for the operation for various uses based on historic water use. The expansion should not cause any drastic changes to the typical water consumption at the operation. Lockhart Pit March 2024 G-4 Lewicki&Associates