2012-07-17_INSPECTION - C2009087 (4)

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July 9, 2012 C-2009-087/Peabody Sage Creek Mine JDM Embankment Damage Pond 003 was holding water with a trickle discharge at the time of the inspection. The primary and emergency spillways were stable with no problems noted. The embankments showed evidence of recent work with animal burrow filling. No problems were noted during the inspection, with the exception of the following: - Heavy houndstounge growth was observed throughout the embankment, emergency spillway, and along the outlet ditch to the flume. Weed management will need to be conducted to address the heavy noxious weed presence in these areas. - The discharge from the pond was not flowing through the flume. A small amount of water appeared to be flowing under the established flume at the time of the inspection. The flume will need to be repaired and maintained according to design. The upper sump was holding water at the time of the inspection. Water was discharging from the Pecoco Pond into the upper sump with a small amount of discharge noted from the upper sump into ditch RC-D3. The embankments of the upper sump were bare and were stable at the time of the inspection. No problems were noted with the exception of the following: - As with the June 2012 inspection, at the left and the right of the primary spillway CMP, the ground appeared to be saturated with moisture. All other areas around the outside of the sump embankments were dry. According to Scott Cowman of PSCM, mine personnel have identified this area as ground water that is percolating to the surface. The location that is saturated sits below the lowest elevation of the Upper Sump; this might exclude the Upper Sump as the source of the saturation of the Area. This are should be monitored to ensure instability of the Upper Sump and Ditch RC-D3 is not compromised. The lower sump was holding water and discharging at the time of the inspection. The embankments were stable with little to no vegetation established. The lower sump has recently been redesigned with the approval of TR4. The redesign work was ongoing at the time of the inspection. No problems were noted with the exception of the following: - The redesign of the Lower Sump required raising of the primary spillway. The additional CMP addition was leaking at the seam to the old riser elevation. A boom was observed around this area to limit the amount of flow. This repair was scheduled to be completed during the construction of the lower sump. Number of Partial Inspection this Fiscal Year: 0 Number of Complete Inspections this Fiscal Year: 1 411 Page of