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Peabody Energy, LLC <br />Page 2 <br />2018 <br />Review of Annual Hydrology Report <br />Mine: Yoast Mine <br />Permit No: C-1994-082 <br />Report Year: 2017 <br />Date Received: 5 April 2018 <br />Water Year 2016 October through 2017 September <br />Date Reviewed: 2018 <br />Reviewed By: Robin Reilley M. S, GISP <br />Submitted By: Seneca Property, LLC <br />Requirement <br />Requirement citation <br />Comment <br />1. Filing frequency of <br />CDRMS regulation <br />The Annual hydrology Report is required to be <br />hydrology report <br />4.05.13(4)(c) <br />submitted yearly. <br />2. Timely filing of hydrology <br />CDRMS regulation <br />The Annual hydrology Report is required to be <br />report <br />4.05.13(4)(c) <br />submitted by February 28 and was received by the <br />Division on 5 April 2018 via U.S. mail. Seneca <br />Property LLC requested and was granted an extension <br />to 5 April. <br />3. Filing frequency of <br />NPDES permit COG- <br />All filing dates were met. <br />NPDES Discharge Monitoring <br />0000221 <br />Reports <br />4. Timely filing of Discharge <br />NPDES permit COG- <br />All DMRs were received on time. <br />Monitoring Reports <br />0000221 <br />5. Sampling frequency of <br />NPDES permit COG- <br />It appears that frequency for sampling was complied with <br />NPDES outfalls <br />0000221 <br />6. Parameters to be sampled <br />NPDES permit COG- <br />All parameters were met. <br />for NPDES reporting <br />0000221 <br />7. NPDES discharge <br />NPDES permit COG- <br />The Yoast Mine discharged from Ponds 010, 011, 012, <br />limitations <br />0000221 <br />013, and 014 during 2017. According to the report no <br />exceedances were noted during the 2017 water year <br />Based on a Memorandum of Understanding between the <br />Division of Reclamation, Mining and Safety and the <br />Water Quality Control Division (WQCD), the WQCD <br />will be responsible for enforcing CDPS permit <br />conditions. <br />