2016-03-07_INSPECTION - C1996084 (2)

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February 29, 2016 C-1996-084/Lorencito Canyon Mine RDZ Inspection Topic Summary NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable NA -Air Resource Protection R -Roads Y -Availability of Records R -Reclamation Success NA -Backfill&Grading R -Revegetation R -Excess Spoil and Dev. Waste NA - Subsidence NA -Explosives Y - Slides and Other Damage Y -Fish&Wildlife NA - Support Facilities On-site R -Hydrologic Balance Y - Signs and Markers Y -Gen. Compliance With Mine Plan Y -Support Facilities Not On-site N -Other Y - Special Categories Of Mining NA -Processing Waste Y -Topsoil COMMENTS A complete inspection was conducted by Rob Zuber of DRMS on February 29, 2016 through March 2,2016(only portions of these three days were focused on Lorencito Canyon). The weather was mostly clear and warm. The ground was dry. Vince Massarotti was present for part of the inspection in the field. Ron Thompson was present for the records check. EXCESS SPOIL and DEVELOPMENT WASTE—Rule 4.09 Placement;Drainage Control; Surface Stabilization: Fills 7, 8, and 9 were inspected; all were generally in good condition. There were no signs of instability or erosion on the faces, except for some minor rills on Fill 7. As noted before, side channels on Fills 7 (east channel) and 9 (west channel)are eroding and need to be repaired. HYDROLOGIC BALANCE -Rule 4.05 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; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; Drainage—Acid and Toxic Materials 4.05.8;Impoundments 4.05.6,4.05.9; Stream Buffer Zones 4.05.18: Issues with erosion on the hill northwest of Fill 9 (known as"the nob")are discussed in the Reclamation Success section. Southwest of this hill,there are very large rills(one of them could be called a gully)that need repair in the near future. The straw bales that currently exist in this area are in bad shape. The following ponds were inspected: 5, 6, 7, 8, 9,and 9A. None of them were discharging. Their embankments and spillways were in good condition. A large amount of sediment has accumulated in Pond 9A; a survey should be performed on this pond in near future. Several culverts were inspected: C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C14, C15, C16, C17, C18,and C19. All of these culverts were found to be clear of sediment and be sized large enough per specifications in the PAP Number of Partial Inspection this Fiscal Year: 7 Number of Complete Inspections this Fiscal Year: 3 Page 2 of 9