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DNR <br />Co �= <br />COLORADO ' <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />John W. Hickenlooper <br />Governor <br />Robert W. Randall <br />Executive Director <br />Ginny Brannon <br />Director <br />INTEROFFICE MEMORANDUM <br />TO: Tabetha Lynch <br />FROM: Clayton Wein <br />DATE: 511512018 <br />SUBJECT: Foidel Creek Mine, C-1982-056, RN -7 <br />Adequacy Responses for Subsidence <br />Tabetha, <br />As requested, I have reviewed the responses to questions 56 and 57 of the January 2, 2018 <br />Adequacy Review. The response to question 56 is adequate. The response provided for question <br />57 is inadequate. The approved subsidence monitoring included with recent AHR reports for the <br />impacts related to Fish Creek is insufficient. The proposed page 2.05-191.7 of the renewal states <br />that, "The results of ongoing hydrologic monitoring are included and evaluated in the Annual <br />Hydrology Report." This was the monitoring plan approved by the Division in PR -08. The <br />AHRs have not been adequately following this plan. The 2016 and 2017 reports have a <br />subsidence section included in section 4.0; however, the section refers the reader to the reports <br />by Michael Berdine dated May of 2017 (2017 AHR). This is contradictory to the approved <br />monitoring program. Section 4.0 in the AHRs does not include an analysis of the data from <br />these reports. Section 5.0 only includes general statements of there being no new subsidence <br />impacts to Fish Creek and a few sentences regarding historical impacts. Future AHRs need to <br />include an analysis of the Fish Creek subsidence data and water quality data in Section 4.0 to <br />satisfy Rule 2.05.6(6)(c). <br />Thank you, <br />Clayton <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor t Robert W. Randall, Executive Director i Virginia Brannon, Director <br />