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Requirement Citation Comment <br /> TDS concentrations appeared consistent with historic data,with <br /> recoverable iron showing a slight upward trend within historic <br /> ranges. <br /> Seasonal discharge occurred at 1 SP. No recorded discharge <br /> from any on site sediment pond occurred during 2021 as per <br /> records received by DRMS. <br /> 7. NPDES discharge NPDES permit The mine water discharge points Eagle Mine No 5 and 7NA <br /> limitations CO-0034142 well(003 or 5D and 024 or 9P3 respectively), did not <br /> discharge in 2021 and no active pumping has occurred since <br /> 2013. No near future discharges are expected. <br /> The Williams Fork River points WF 1 and WF2 are <br /> monitored for filed parameters on a monthly basis. <br /> Based on a Memorandum of Understanding between the <br /> Division of Reclamation,Mining and Safety and the Water <br /> Quality Control Division(WQCD),the WQCD enforces <br /> CDPS permit conditions. <br /> CWQCC The receiving waters(Segment 13b)are designated"Use- <br /> 8. Basic Standards for Regulation 31; Protected". <br /> Surface Water Antidegradation <br /> standard Reg 3 8.1 <br /> The Williams Fork Mines are located on Segment 13b of the <br /> Lower Yampa/Green River Sub-basin of the Lower Colorado <br /> River Basin. CWQCC lists numeric standards for Segment 13b <br /> in its regulation 37. The permitee monitors water in the <br /> Williams Fork River at a site upstream of the mine(WF1),as <br /> CWQCC well as downstream from the mine(WF2). <br /> 9. Instream Numeric Regulations 31 <br /> Standards and 37 Data over time from the upstream site indicate the Williams <br /> Fork River naturally exceeds the numeric standard for iron,and <br /> occasionally the lead and manganese standards. <br /> Comparisons of the upstream and downstream data indicate <br /> mining and reclamation operations at the Williams Fork Mines <br /> do not cause the exceedances. <br /> The WF 1 and WF2 sites were monitored in accordance with the <br /> approved sampling plan. Additional monitored surface water <br /> Exhibit 29; sites comprise mine discharge points(NPDES 9003 and 9024) <br /> 10. Surface water d soils spring DES 9022 <br /> monitoring sampling CDRMS mining an p p g 1 SP� )- <br /> permit C-1981- <br /> frequency. 044 MCM appears to be sampling the surface water NPDES <br /> discharge monitoring sites in accordance with their permit. <br /> MCM needs to be timely in submitting surface water monitoring <br /> information to The Division. <br /> Page 2 <br />