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3. SEDIMENT POND/ OTHER IMPOUNDMENT/ LIVESTOCK WATER POND INSPECTION REPORTS Requirement In accordance with Rule 4.05.9(13) all impoundments are inspected quarterly for structural weakness, erosion and other hazardous conditions. Reports aze to be submitted annually to the Division. Colowyo conducts quarterly inspections of sediment ponds, the washbay pond, the Taylor pump holding pond and the stockponds located on reclaimed areas. During 1999 Technical Revision 41 was approved which changed the operation of all ten of the sedimentation ponds from structures that provide containment of the design event to structures which provide treatment of the design event. During 1999 all pond outlet structures needing modification (such as perforated riser pipes) was completed. Response Sediment Ponds, Washbay Ponds and Taylor Pump Holding Pond. The Sediment Pond Inspection Reports aze found in Exhibit 2. The reports indicate the ponds aze operating in accordance with certified and approved designs. All embankments, spillways, and other outlet structwes are in good operating condition. • Streeter Pond (001) -The Streeter pond received no maintenance. Work Area Pond (002) -The underside of the outlet pipe on the outside of the Work Area pond had corroded. The section of pipe was replaced and fitted with new pipe. Gossard Pond (003) -The Gossard pond received no maintenance. Gulch A. Pond (004) -The Gulch A pond received no maintenance. Stoker Pond (005) -The Stoker pond received no maintenance. Rail Loop Pond (006) -The Loop pond received no maintenance. Prospect Pond (007) -The Prospect pond received no maintenance. West Pit Pond (008) -The West Pit pond received no maintenance. The painted, steel fencepost markers located on the hillslope above and south of the pond indicate no further evidence of instability. The small french drain placed on this same slope to drain a small elevated perched water zone associated with a roll in a thin coal seam is also functioning as designed. Section 16 Pond (009) -The Section 16 pond received no maintenance. East Taylor Pond (010) -The East Taylor pond received no maintenance. The unstable hillslope located above and east of the pond was sloped by a dragline. Our intent was to not topsoil the area until we can determine the slope remains stable. The instability has been caused the movement of perched water through outcropping coal seams. Mine development upgradient of the area should dry up the source of water and prevent future movement. Washbay Sediment Sump -The sediment sump was dredged of sediment. No additional repairs were necessary. Wazehouse /Washbay Pond -The wazehouse pond received no maintenance. Taylor Pump Holding Pond -The Taylor Pump Holding Pond received no maintenance.