2020-01-30_REPORT - C1982056 - Laserfiche WebLink

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850051(6MN Pad Area),CO- 850054(18LT) CDPS permits CO-0027154 (Main surface facilities),CO- Based on a Memorandum of Understanding between the Division 7. CDPS discharge 0036684(Pond E at Fish of Reclamation, Mining and Safety and the Water Quality Control limitations Creek Tipple),CO-0042161 Division (WQCD),the WQCD will be responsible for enforcing CDPS (Fish Creek Borehole),COG 850051(6MN Pad Area),CO Permit conditions. 850054(18LT),COG-073534 The mine discharges surface runoff and pumped mine water to the following stream segments in Region 12 of the Yampa River basin: Segment 2c,Yampa River from confluence with Oak Creek to confluence with Elkhead Creek Segment 13f,Trout Creek below Fish Creek Segment 13c,Trout Creek above Fish Creek Segment 13b, Foidel Creek, Fish Creek, Middle Creek above Trout Creek to CR27 Segment 13a,Trout Creek to Fish Creek Typical flow patterns were exhibited in Foidel Creek at Site 008, 800,and 14,located immediately downstream and upstream from the Foidel Creek Mine respectively. Foidel Creek at Site 008 is fed by surface runoff and coal spoil leachate springs on the historical Eckman Park/Energy Fuels coal mining area. Water quality parameters at these sites were within previously established 9. Instream Numeric ranges in 2018 with any exceptions noted in item 12 below. Standards CWQCC regulation 33.0 Typical flow patterns were exhibited in Fish Creek at sites 16A, 302, 1002,27a,and 1003. Water quality parameters at these sites were within previously established ranges in 2018 with any exceptions noted in item 12 below. Typical flow patterns were exhibited in Trout Creek at sites 301,69 and 1005,with the exception of increased flow in August 2018, after a Call was placed on Yampa and irrigation decreased and flows at Trout Creak increased. Water quality parameters at these sites were within previously established ranges in 2018 with any exceptions noted in item 12 below. Typical flow patterns were exhibited in Middle Creek at Site 29. Water quality parameters at this site were within previously established ranges in 2018 with any exceptions noted in item 12 below. The Wadge overburden and the Twentymile Sandstone are the 10. Basic Standards two aquifers most likely to be affected by mining. If the workings (Interim Narrative CWQCCregulation 41.5.C.6 are developed to the maximum extent approved,the monitoring Standard)for Ground locations of both formations will be upgradiant from mine Water workings. The following wells serve as the Foidel Creek Mine's ground water points of compliance: 97013TM (Twentymile 2