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August 29, 2012 C- 1981 - 035 /King Coal Mine MLT <br />the coal mine waste pile. Mr. Bird said that they have completed an up -to -date topographic <br />survey of the King I facility, and will use that information in the design of the pile. <br />• No changes have been made to the King I coal mine waste backfill since the installation of <br />the six monitoring wells. <br />FISH and WILDLIFE — Rule 4.18: <br />• Mr. Wymore said that a herd of seven buck mule deer was recently seen on the pad at the <br />King II Mine, between the crushing /screening structure and Coal Stack Tube #2 while a <br />front -end loader was operating nearby. Mine personnel have also seen a few bears and, <br />unfortunately, rattlesnakes. <br />HYDROLOGIC BALANCE - Rule 4.05 <br />Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures <br />4.05.7, 4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; <br />Surface Water Monitoring 4.05.13; Drainage — Acid and Toxic Materials 4.05.8; Impoundments <br />4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />Following a dry spring, the monsoon season arrived in the Four Corners region in early July. <br />Ground conditions at the mine were dry at the time of the inspection, and ditches and culverts <br />were generally well- maintained and in good condition. <br />King I Mine <br />• King I sediment ponds and ditches are illustrated on Maps King I -007 and -007A of the <br />permit. Design Details are provided in Appendix 11 of the King I permit binder. <br />The East (Photo 1) and West (Photo 2) Ponds were dry at the time of the inspection, and the <br />banks appeared to be stable. Primary and emergency spillways were clear, and it did not <br />appear that any maintenance to those features was required. <br />As described on page 11 of Appendix 11(1), the ponds are connected by an 8" pipe that <br />allows the East pond storage volume to supplement that which is available in the West pond. <br />During the inspection, we identified the inlet to this 8" pipe protruding from the eastern <br />embankment of the West Pond, but were unable to find the pipe outlet in the East Pond. <br />Please ensure that the outlet of this pipe is clear of sediment so that flow from the West to <br />East will not be impeded <br />The sediment levels in the West and East Ponds do not appear to have risen much over the <br />past two years. However, the sediment levels should be measured in order to ensure that <br />the ponds jointly provide adequate capacity to contain or treat the runoff entering the pond <br />as a result of a 10 -year, 24 -hour precipitation event. [4.05.6(3)(a)]. According to Page 11 of <br />Appendix 11(1), the combined available storage volume for the two ponds must be 2.26 <br />Acre -Feet or greater. <br />In the center of the King I bench, near the location of the former Stacker Tower #2, structures <br />carrying both clear water and water collected from the disturbed areas are visible on the <br />surface (Photo 3). During a previous inspection, it was noted that the 18" flexible pipe <br />carrying clear water from the natural drainage to the south (Reach 3 on Map King I -007), had <br />been damaged. A repair collar has now been placed on the torn segment of the pipe. Also, <br />Number of Partial Inspection this Fiscal Year: 2 <br />Number of Complete Inspections this Fiscal Year: 0 Page 3 of 9 <br />