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July 30, 2015 <br />C-1981-028/Keenesburg Strip Mine REVISED TNL <br />Inspection Topic Summary <br />NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA Not Applicable <br />Y - Air Resource Protection <br />N - Availability of Records <br />R - Backfill & Grading <br />NA - Excess Spoil and Dev. Waste <br />NA - Explosives <br />N - Fish & Wildlife <br />R - Hydrologic Balance <br />Y - Gen. Compliance With Mine Plan <br />N -Other <br />NA - Processing Waste <br />Y -Roads <br />N - Reclamation Success <br />R - Revegetation <br />NA - Subsidence <br />NA - Slides and Other Damage <br />Y - Support Facilities On-site <br />Y -Signs and Markers <br />NA - Support Facilities Not On-site <br />NA - Special Categories Of Mining <br />R -Topsoil <br />Revised 8/4/2015 <br />COMMENTS <br />A partial inspection of the Keenesburg Mine, C-1981-028, operated by Coors Energy Company was conducted on <br />30 July, 2015 by Tabetha Lynch of the Division of Reclamation, Mining and Safety. The weather was clear and <br />sunny at the time of inspection. Danny Kipp with with CEC was present during the inspection. <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 />One load of ash had been delivered to B -Pit before the inspection began (photo ). Three loads were <br />expected. It is anticipated that loads will continue for 6-7 weeks at which time loads will drop off again as the <br />power plant cycles through a gas process. Ash would be expected again in October through the end of the year. <br />The pit and long term spoil areas appeared stable. There was water present in B -pit. <br />Top sand placement and compost have now been completed in Area 32, and seeding is planned for the Fall. Top <br />sand is currently being placed in Area 33. Area 33 is in the long term spoil area, which requires 15 inches of top <br />sand indicated by reflectors on the sediment depth markers. Photos at the end of the report show this progress. <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 />Sediment Pond No. 2 was holding a small amount of water (photo). The banks appeared stable and in <br />good condition. Water level marker was in place. The dugout pond was also holding a small amount of water <br />(photo). The side slopes were well vegetated and stable. <br />Number of Partial Inspection this Fiscal Year: 1 <br />Number of Complete Inspections this Fiscal Year: 0 <br />Page 2 of 6 <br />