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Inspection Topic Summary <br /> NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable <br /> N -Air Resource Protection Y -Roads <br /> N -Availability of Records Y -Reclamation Success <br /> R -Backfill&Grading R -Revegetation <br /> R -Excess Spoil and Dev. Waste N - Subsidence <br /> N -Explosives R - Slides and Other Damage <br /> Y -Fish&Wildlife N - Support Facilities On-site <br /> R -Hydrologic Balance Y - Signs and Markers <br /> R -Gen. Compliance With Mine Plan N - Support Facilities Not On-site <br /> N -Other N - Special Categories Of Mining <br /> N -Processing Waste R -Topsoil <br /> COMMENTS <br /> This was a partial inspection of the Colowyo Mine conducted by Zach Trujillo of Colorado Division of <br /> Reclamation, Mining and Safety(DBMS) on August 14-15, 2019. The primary focus of this inspection was topsoil <br /> depth verfication with reclamation parcels associated with the Colowyo SL-16 Bond Release Applicaiton. Tony <br /> Tennyson representing Tri-State Generation and Transmission Association(Tri-State) and Tom Fry representing <br /> Colowyo Coal Company(Colowyo) accompained the inspection. The weather for inspection was clearand <br /> temperature during the inspection was around eight five degrees fahrenheit. <br /> BACKFILL and GRADING—Rule 4.14 <br /> Contemporaneous Reclamation 4.14.1; Approximate Original Contour 4.14.2; Highwall Elimination 4.14.1(2)(f); <br /> Steep Slopes 4.14.2, 4.27;Handling of Acid and Toxic Materials 4.14.3; Stabilization of Rills and Gullies 4.14.6: <br /> Contemporaneous backfilling continues within the South Taylor Pit. Pit progression is the west where spoil is <br /> transported to the east by dragline or truck/shovel operations. <br /> EXCESS SPOIL and DEVELOPMENT WASTE—Rule 4.09 <br /> Placement; Drainage Control; Surface Stabilization: <br /> The West Taylor Fill was inspected. Rill repair had occurred along the western edge of the fill. Overall the fill is <br /> well vegetated and no issues were observed. <br /> The Collom Spoil Pile continues as overburden and spoil is removed during the mining progression. <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 /> A total of three ponds were inspected during this inspection. The West Taylor Pond and Stoker Siding Pond both <br /> held water and were discharging at the time of the inspection. Embankments was stable and well vegetated. <br /> The Streeter Pond was also inspected. Cleaning and maintenance was occurring during the inspection. Sediment is <br /> being removed from the northern end of the pond. The additional sediment within the pond would continue to <br /> settle and spread along the areas where removal is occurring. This process has been repeated until a steady state <br /> was achieved with the sediment settlement within the pond. Sediment removal from the pond is now moving south <br />