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Permit No. COCr850000 <br />Facility No. COG850054 <br />Page la <br />Colorado Discitarge Permit System Regulations <br />CERTIFICATION <br />under <br />GENERAL PERMIT FOR COAL MINING FACILITIES (SIC NO. 1222) <br />Category 07, Sub -category 5, General Permits, Current fee $780/year (CRS 25-8-502) <br />This certification specifically authorizes Peabody -Twentymile Coal Company to discharge from the Foidel Creek Mine <br />as described below and in accordance with the General Permit for Coal Mining Facilities (Surface Runoff} <br />All correspondence relative to this facility should reference the specific facility number,COG-850054. <br />Permittee Facility Contact <br />Peabody -Twentymile Coal Company Jason Davis, Mine Manager <br />29515 County Road 27 970-879-3800 <br />Oak Creek, CO 80467 Email: idavis(iDpeabodyenergy com <br />Facility Contact: Brian Watterson, Environmental Geologist <br />Email: bwatterson(c�peabodyenergy.com <br />Project Name, Activity and Location <br />18 -Left (18LT) Sedimentation Pond- Foidel Ceek Mine is an active coal mine that has individual permiis (CO -0042161, CO -0027154) <br />for coal mining activities. This permit is coveringthe sedimentation pond that was previously covered under the stormwater permit <br />COR031`087. The sediment pond is used for control and treatment of mine facility area runoff for the 18 LT FanPad area. The pond <br />discharges to an unnamed tributary that leads to Fish Creek in the Twentymile Park Basin The facility is located at 29515 Routt <br />County Road 33 in Unincorporated Routt County Colorado 80467, latitude 40°21'07.71" N, longitude 107°03'33.41" W. <br />Discharpe Points <br />Outfalls Source Treatment Lai/Long 10 -Yr, 24 -Hr Receiving Water <br />Capacity <br />Unnamed tributary <br />001A Surface Runoff Sedimentation 40022'25.68" N / 107°07'21" 1.034 that leads to Fish <br />W Creek <br />Effluent Parameters <br />The discharge is to Fish Creek, within Segment 11 of the Yampa River Sub -basin, Upper Colorado River Basin, found in the <br />Classifications and Numeric Standards for the Upper Colorado River Basin (Regulation No. 33; last update effective January 01,2009). <br />Segment 11 is Undesignated, and is classified for the following beneficial uses: Aquatic Life, Class 2 Cold; Recreation Class N; and <br />Agriculture. <br />Permit Limitations and Monitoring Requirements for Outfalls 001for Surface Runoff or Non -coal Related Waste Streams <br />Parameter <br />Limitations <br />30 -Day <br />7 -Day <br />Daily <br />Rationale <br />Monitoring <br />Sample <br />vg. <br />Avg. <br />Avg. <br />Max. <br />Type <br />---------------------------------------General Permit Requirements ------------------------------------------- <br />Flow, MGD <br />Report <br />NA <br />Report <br />Discharge Evaluation <br />Continuous/ 2 <br />RecordZ r / <br />Instantaneous <br />In-situ <br />pH, s.u. <br />N/A <br />NA <br />6.5-9.0 <br />Water Quality Standards <br />2 days/month <br />Grab <br />Oil and Grease, mg/I <br />N/A <br />NA <br />10 <br />State Effluent Regulations <br />2 days/month <br />Visual 3 <br />-----------------------------------Federal <br />Effluent Limitation Guidelines ---------------------------------------- <br />Settleable Solids, mIA <br />Report <br />NA <br />0.5 <br />Federal ELG <br />2 days/month <br />Grab <br />Settleable Solids, mUl <br />Report <br />NA <br />Report <br />Federal ELG <br />2 days/month <br />Grab <br />-----------------------------------------------Site Specific Limitations ----------------------------- ---------- <br />Total Dissolved Solids, mg/l Report NA Report Salinity Regulations Quarterly 4 Grab <br />SSUED AND EFFECTIVE: APRIL 15 2010 EXPIRATION• JUNE 30 2013 <br />