2015-06-08_INSPECTION - C1981019

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an equipment platform for clean-out and a baffle to prevent short-circuiting of the pond. The Streeter Pond was discharging at the time of inspection. Several duck species were present. The Work Area Pond was holding water but not discharging during the inspection. Water may be pumped from here to the Wash Area Pond and/or used for dust control within the mine site. CCC recently reworked the pond's embankment and replaced the discharge structure. The embankment has been seeded twice and grasses are beginning to sprout. Multiple lines of straw wattles have been placed along the face of the embankment and at the discharge point. Most of these wattles are well -staked but improperly placed and keyed into the ground (see photo 21602). For this reason, the wattles would not adequately detain runoff and allow sediment to settle out prior to proceeding downslope. The wattle at the discharge structure is placed on a rocky outslope and would be very difficult to key in properly. Because it is partially elevated above ground surface in several locations, this particular wattle would have little to no interaction with surface runoff. Due to rocky conditions, this may not be possible to fix. Wattles should be placed in a 3 — 5" depression, staked, and seated with foot -tamped backfill on the upstream side. Vegetative establishment may be the best line of defense in stabilizing ground surfaces on this embankment. Colowyo has recently experienced significant rains and no signs of erosion were noted. Rushes along the outside of the lower embankment indicate seepage. Mr. Blunt said this has been the case for at least 14 years and has not indicated a stability issue. Based upon my experience, this is somewhat typical of sedimentation ponds where water is usually detained (the pond is not normally dry). The Gossard Loadout Pond was discharging during the inspection. A coal fines sediment plume has established in the pond and is scheduled for clean-out this year (see photo 21603). There are also coal fines in the diversion around the facilities area and tumbleweeds accumulating in a down drain which will require clean-out. soon. Rule 4.08.5: Records of Blasting (OSMRE topic specific evaluation) As specified in the work plan for this review, we evaluated the records for CCC's 10 most recent blasts for compliance with Rule 4.08.5. This included ensuring that each record contains specific information including: the name of the operator conducting the blast; location, date, and time of blast; name, signature, and license number of the blaster -in -charge; identification, in feet, from the nearest blast hole to the nearest dwelling, school, church, community, or institutional building outside the permit area or not owned or leased by the person conducting the mining operations; weather conditions including temperature, wind direction, and approximate velocity; type of material blasted; sketches of the blast pattern including number of holes, burden, spacing, delay pattern, and decking (as applicable); diameter and depth of holes; type of explosives used; total weight of explosives used per hole and maximum weight of explosives used per 8 - millisecond period; initiation system; type and length of stemming; mats or other protection used; type of delay detonator and delay periods used; number of persons in the blasting crew; seismographic and airblast records (where required) including the type of instrument, sensitivity, and calibration of the gain setting or certification of annual calibration; exact location of instrument and the date, time, and distance from the blast; name of the person taking the reading; name of the person and firm analyzing the seismographic record; the vibration and/or airblast level recorded; and the reasons and conditions for each unscheduled blast. 3 1 Page