2020-12-14_GENERAL DOCUMENTS - C1981035

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GCC King II Mine 2020 Spring and Seep Survey Technical Evaluation 1. COMPANY: GCC Energy, LLC (GCCE) 2. MINE/OPERATION: King II Mine 3. TRACKING SYSTEM INFORMATION. A. OSMRE Proiect No. (CRSS): UM.CO.0106C.3238 B. Letterhead date of submittal: October 2, 2020 4. TYPE OF APPLICATION/DOCUMENT REVIEWED. ❑ New permit application ❑x Permit revision application ❑ Permit renewal application ❑ Permit transfer, assignment, or rights sale application ❑ Other: 5. EVALUATION. Part of application/document reviewed: 2020 Spring and Seep Survey (1) Citation of applicable regulations: 30 CFR 784.14 Hydrologic Information (2) Evaluation of compliance with the requirements of the applicable regulations: GCCE submitted a spring and seep survey in support of a permit revision application to expand the permit area an additional 2,462 acres. The operator was notified in response to their September 2019 application that they were required to conduct a new spring and seep survey along East Alkali Gulch which would encompass the proposed permit area expansion. Specifically, the following deficiency was highlighted: 30 CFR 784.14(h) and 784.14(i) require a permit applicant to submit groundwater and surface water monitoring plans, respectively, which provide baseline data to compare PHC predictions and downstream/downgradient water data to monitor parameters relevant to the post -mining land use and applicable water quality standards, and capture downstream/downgradient water data of poten(ially impacted streams and strata. The groundwater monitoring includes 9 new wells and captures baseline conditions and information on all applicable hydrologic units which could be affected by mining operations, upgradient and downgradient. However, GCCE has not provided any information on springs and seeps in the revised permit area. A spring and seep survey must be conducted on the proposed expansion to the permit area and all springs and