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December 13,2022 C-1982-056/Foidel Creek Mine ZTT <br /> Inspection Topic Summary <br /> NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable <br /> N -Air Resource Protection R -Roads <br /> N -Availability of Records N -Reclamation Success <br /> N -Backfill&Grading N -Revegetation <br /> N -Excess Spoil and Dev. Waste N - Subsidence <br /> N -Explosives N - Slides and Other Damage <br /> N -Fish&Wildlife R - Support Facilities On-site <br /> R -Hydrologic Balance R - Signs and Markers <br /> N -Gen. Compliance With Mine Plan N - Support Facilities Not On-site <br /> N -Other N - Special Categories Of Mining <br /> R -Processing Waste N -Topsoil <br /> CONIMENTS <br /> This was a partial inspection of the Foidel Creek Mine(Foidel)conducted by Zach Trujillo of Colorado Division <br /> of Reclamation,Mining and Safety(DRMS)on December 13,2022.Miranda Kawcak representing Twentymile <br /> Coal,LLC(Twentymile)accompained the inspection.The weather for inspection was snowing with snow covered <br /> gound conditions of around 6 inches to 1 foot in depth.High temperatures during the inspection were around 20 <br /> degrees fahrenheit.Access to outter ancillary areas were limited due to snowy ground conditions. <br /> HYDROLOGIC BALANCE -Rule 4.05 <br /> Drainage Control 4.05.1,4.05.2,4.05.3; Siltation Structures 4.05.5,4.05.6; Discharge Structures 4.05.7,4.05.10; <br /> Diversions 4.05.4;Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; <br /> Drainage —Acid and Toxic Materials 4.05.8;Impoundments 4.05.6,4.05.9; Stream Buffer Zones 4.05.18: <br /> The majority of ponds within the facilities area was inspected. Ponds were partially froze over and embankments <br /> snow covered.No issues were observed and all ponds were functional.The following table outlines additional <br /> information that was observed with each associated pond. <br /> Location Holding discharging source goes to notes <br /> water <br /> 61VIN Reservoir y N mine water Recirculates Inspected. No issues. <br /> mine water. <br /> Does not have <br /> a discharge pt. <br /> 61VIN ventilation shaft y N pad runoff Inspected. No issues. <br /> sed pond <br /> 61VIN wetlands y N Underground 61VIN reservoir Water from ponds is pumped <br /> dewatering to the 61VIN reservoir, no <br /> discharge is currently <br /> approved at this site <br /> Number of Partial Inspection this Fiscal Year: 4 <br /> Number of Complete Inspections this Fiscal Year: 2 <br /> Page 2 of 5 <br />