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May 14, 2019 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: 4 <br /> <br /> Page 4 of 9 <br /> <br /> <br />Blast in South Taylor Pit. <br />FISH and WILDLIFE – Rule 4.18: <br />Elk, deer and pronghorn were observed throughout the site during the inspection. <br /> <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 4.05.7, 4.05.10; <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 />All major ditches were inspected which included Section 29, Section 28, Section 16, South Collection, Final East <br />Pit, North Trib. - East Pit, East Side Collection, Streeter South Side, Streeter Gulch , East Taylor, and Taylor Trib. <br />for the South Taylor/East/West Pit area. Most were dry but water was observed flowing along the Final East Pit <br />Ditch and subsequently the South Collection Ditch. All currently constructed ditches for the Collom area were also <br />inspected. This included D-1, 2, 3, 4, and D-6 ditches. All ditches were dry during the inspection. Erosion was <br />observed within the D-2 Ditch and is schedule for general maintenance. All ditches were stable and no issues were <br />observed. <br /> <br />Most of the ponds at the Colowyo Mine were inspected. This included the Section 28, Prospect, Gulch A, Streeter, <br />Section 16, Work Area, West Taylor, East Taylor, West Pit, Stoker Siding, Gossard, Rail Loop, Section 36, <br />Middle, Section 25, Sidehill and Section 26 Ponds. Most ponds held minimal water with no discharge or were dry. <br />The following ponds were discharging and most were measured at their associated flume during the inspection: <br /> <br />Streeter ~ 0.22’ <br />Stoker Siding ~ 0.02’ <br />East Taylor ~ 0.20’ <br />West Taylor - Not measured. <br /> <br />All pond embankments were stable and all spillways were in functioning order.