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February 13,2020 C-1981-019/Colowyo Coal Mine ZTT <br /> Air <br /> �. <br /> y <br /> West Taylor Fill. Spoil staging at Collom Pit. <br /> Side profile of Collom Temporary Spoil Pile. <br /> EXPLOSIVES—Rule 4.08 <br /> Distance Prohibitions 4.08.4; Warnings 4.08.4; Control of Adverse Effects 4.08.4: <br /> Drilling for a future blast was occurring above the Collom Pit to the north.The blast was going to be within the <br /> overburden. <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 /> Due to adverse road conditions and deep roadside snowdrifts,the Streeter Pond and Prospect Pond were inspected <br /> from State Highway 13. Pond embankments were stable and no issues were observed. <br /> Number of Partial Inspection this Fiscal Year: 8 <br /> Number of Complete Inspections this Fiscal Year: 2 <br /> Page 4 of 7 <br />