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January 19,2023 C-1981-019/Colowyo Coal Mine ZTT <br /> �„.�, .awe,-• <br /> h rg <br /> P <br /> e <br /> Drill rig at Little Collom Gulch highwall bench. Drill hole. <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 safety issues and snow accumulation,most ponds on site were inaccessible. Ponds on site inspected were <br /> limited to the loadout area which include Gossard, Rail Loop and Stoker Siding Ponds and overlook area for <br /> Section 36 and Middle Ponds. Each pond at the loadout area held water and were froze over. Gossard and Rail <br /> Loop ponds are total containment ponds and do not discharge. Due to snow depths, discharge of Stoker Siding <br /> Pond could not be observed. Section 36 and Middle Pond were inspected from the Collom Haul Road from an <br /> elevation above. The ponds were snow covered but appeared stable.No issues were observed. <br /> INV <br /> 07 <br /> y � ,k, <br /> s�wsg. <br /> Gossard Pond. Section 36 and Middle Ponds. <br /> GENERAL MINE PLAN COMPLIANCE: <br /> Number of Partial Inspection this Fiscal Year. 5 <br /> Number of Complete Inspections this Fiscal Year. 2 <br /> Page 3 of 5 <br />