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March 30, 2017 C-1981-019/Colowyo Coal Mine ZTT <br /> <br /> <br />Number of Partial Inspection this Fiscal Year: 7 <br />Number of Complete Inspections this Fiscal Year: 3 <br /> <br /> Page 3 of 7 <br /> <br />Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; <br />Drainage – Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />The Prospect Pond was discharging during the time of the inspection. Discharge was measured at the 30” flume to <br />be approximately 0.1 or 0.28 cubic feet per second. The discharge was clear and no issues were observed. The <br />pond embankments were stable and well vegetated. Both primary and emergency spillways were in working order. <br /> <br />The Gulch A Pond held water but was not discharging. The pond was in good shape and no issues were observed. <br /> <br />The Streeter Pond was discharging and measured at the approximately 0.12. Visual inspection of the discharged <br />water was clear with no issues. The embankment was disturbed for an AML project along an adjacent area. The <br />embankment was reseeded and hay was spread over in 2016. Underneath the hay, vegetation is beginning the <br />sprout in the area. No issues were observed with the Prospect Pond. <br /> <br />The Stoker Pond was inspected. The pond was discharging during the inspection and was measured at <br />approximately 0.03 in the associated flume. No issues were observed. <br /> <br />Minor erosion was obs erved at the reclaimed administration building area. The erosion was minimal and was <br />contained to the area. A small rill formed along approximately 2/3 of the length of slope from the base of the <br />reclaimed area up. The rill was roughly 3-4 inches wide and deep at most in some sections. Small sediment <br />deposition occurred at the base of the reclaimed area where the slope lessened. Once the areas vegetation becomes <br />more mature, it is expected that the area will self -heal given experience of the area and the gentle slope of the <br />reclamation. No issues were observed. <br /> <br /> <br />Minor erosion located at the administration building reclamation area