2020-03-20_INSPECTION - C1981010

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muddy conditions, so we observed the area from the truck. We did not see any water flow from our vantage point. Most of the contributing watershed is reclaimed. No problems were noted. • Deal Pond: inaccessible due to muddy road and ground conditions • Industrial Waste Pond: outlet has been permanently sealed, so this is a containment pond now. This impoundment receives water from a truck wash bay, and water will be pumped out of the pond for re-use on site. • No Name 4: partially iced but flowing • No Name 5R: flowing • No Name 2: flowing • Coyote: holding water • Middle Flume 2: full and discharging • East Flume: very small amount of standing water, spillway clear. Sediment marker was not visible although thought to be recently replaced. • Deacon Pond: very small amount of water, not discharging. • Jeffway Pond: embankment and spillway in good condition. Rule 4.06: Topsoil All observed topsoil stockpiles were stable and marked as required. Stockpiles were snow covered at the time of inspection. No problems were noted. Rule 4.08: Use of Explosives Blasting activities are occurring in accordance with all applicable DRMS regulations. We observed a parting shot in L Dip Pit at 3:30 on Thursday in accordance with TMI's recently published blasting schedule. All required signage, ground control mechanisms, audible notifications, and warning sirens were observed. We also reviewed sample blasting records from the previous three months and found everything well-documented as required. Pre-blast surveys were on file for all nearby structures. The nearest structure to recent blasting activities is about a mile away. Rule 5.02.4: Availability of Records: All required records were on file in the mine office and easily locatable or readily produced by mine staff. The NPDES permit renewal is currently in progress as TMI negotiates with the Colorado Department of Public Health and Environment regarding CDPHE changes to the existing permit. TMI's blasting schedule was recently published in a local paper(affidavit dated 2/19/2020). A random sample of blast records from the previous three months were evaluated and found to contain all information required under Rule 4.08.5. Maintenance Items Noted: • Impoundment H: Russian olive weed trees to be removed from embankment when ground conditions allow. Programmatic Compliance: No enforcement actions were initiated, and none were pending during this inspection. 2 1 Pa g e