2016-09-22_INSPECTION - C1996084

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September 21, 2016 C-1996-084/Lorencito Canyon Mine RAR Number of Partial Inspection this Fiscal Year: 2 Number of Complete Inspections this Fiscal Year: 1 Page 3 of 10 o The mine site identification sign at the entrance to the Lorencito site appeared intact, displaying all required information: mine name, operator name, address, phone number and DRMS permit number and contact information. ROADS Rule 4.03, Construction 4.03.1(3), 4.03.2(3); Drainage 4.03.1(4), 4.03.2(4); Surfacing and Maintenance 4.03.1(5) and (6) 4.03.2(5) and (6). o The roads into and around the facility were inspected. Some road sections require grading particularly due to recent rains, however overall it appeared that the operator was maintaining roads in good working order. Roads requiring grading include: a. Road to Pond 9 b. Road to Pond 8 c. Road to Pond 6 o No fugitive dust was being generated. o Cut culvert C1, identified in previous reports had been addressed and required some backdressing at the time of inspection. o Due to recent rains numerous culverts, as expected after such heavy rains, required cleaning. Most culverts functioning properly with the exception of: 4. At C4 the sump requires cleaning as does the check dam behind. The Culvert however was clear. 5. C5 was not draining, it should drain to the north east. Also the stakes south of C5 should be pulled. 6. Culverts C6, C7 require cleaning and C8 should have positive drainage established. 7. Check dams on roads need to be monitored for maintenance. HYDROLOGIC BALANCE- Rule 4.05 General Requirements 4.05.1; Effluent Standards 4.05.2; Divergence and Conveyance of Overland Flow 4.05.3; Diversions 4.05.4; Sediment Control Measures 4.05.5, 4.05.6; Discharge Structures 4.05.7; Impoundments 4.05.9; Underground Mine Entry 4.05.10; Surface and Ground Water Monitoring 4.05.13; Stream Buffer Zones 4.05.18: Ponds 6, 7, 8, 9 and were inspected and holding water. Generally embankments and spillways appeared in good condition. Some erosional features exist on site. Treatment of these features includes filling gullies with branches and installing straw bales or wattles. o Pond 9 or, the North Pond, held significant water but was not discharging at time of inspection (photo 1). The decant holes had been cleared the day before. The armored channel directing flow to the pond and perimeter ditch (D3) around fill 9 appeared to be in good repair and functioning adequately. o Pond 8 was discharging and the decant holes required cleaning due to the material transported during rainstorms. (Photo). o Pond 7 was discharging and Pond 6 was not discharging at the time of inspection. o Culverts required maintenance, as noted above. o Sumps observed held water and most required some cleaning due to the past two weeks of considerable precipitation. o Ditches were inspected and the following high priority maintenance issues discussed. 8. Ditch D18 requires maintenance. o No offsite impacts were observed at time of inspection.