2012-05-25_INSPECTION - C1981008

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May 21, 2012 C- 1981- 008/Nei�- Horizon Mine MLT 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: • Pond 007, which receives inflow from the Krill Drainage and San Miguel Draw, appeared to have reached the level at which discharge to Calamity Draw would occur (Photos 1 and 2). • Locations of the 26" and 12" buried HDPE irrigation lines installed by WFC for the West Lateral Ditch are shown on Photo 2. • Photo 3 shows the locations of Ponds 009 and 012, together with the collection ditches that capture runoff from the disturbed area and direct it to the ponds. • Ponds 011, 013 and 015 are identified in Photo 5. Only Pond 013 held water; the other two were completely dry. • Water that accumulates in the pit, visible in Photo 4, is pumped to the elevated water tank to be available for use in dust suppression activities. Overflow from the tank flows to Pond 013, which then discharges to Tuttle Draw. 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); Reclamation 4.03.1(7) / 4.03.2(7): Roads are identified in the various photos. County Road 2700 within the permit area and the portion of BB Road running east from 2700 Road are being included in WFC's SL -13 bond release application. The Northeast Perimeter Haul Road, which connects the mine's support facilities with the active pit area, is identified on Photo 1. REVEGETATION — Rule 4.15 Vegetative Cover; Timing: • Irrigation was in progress on reclaimed fields located east of 2700 Road, where Irrigated Pasture is the approved post- mining land use (Photos 1 and 2). SPECIAL CATEGORIES OF MINING — Rules 4.22 through 4.27: Rule 4.25 - Prime Farmland • Topsoil and subsoil salvage from the Morgan property has reached the final limit, as shown on Photo 4. • Stockpiles of Lift A Topsoil, Lift B Subsoil, Mixed Topsoil, and Bench 1 (OBI) are identified on Photo 3. Since 2008, soil has been salvaged in two lifts from the Morgan property, as required by the permit. Number of Partial Inspection this Fiscal Year: 10 Number of Complete Inspections this Fiscal Year: 4 Page 3 of 9