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2016 ANNUAL IMPOUNDMENT INSPECTION <br />Mine: New Horizon 2 Mine <br />Pond Name: Pond 009 <br />NPDES Permit & Outfall #s: CO -0000213 <br />Date Inspected: 2 -March -2016 <br />Location Description: 2 miles NW of Nucla <br />Owner's Rep.: Rick Wolney, Mine Manager <br />Pond Type: Partly Incised <br />CDRM & S #: C-1981-008 <br />Date Last Examination: 16 -October -2015 <br />Legal Location: Sec 36 of T47N R16W <br />Inspector's Name: Frank Ferris <br />Pond Capacity Data <br />As Built Pond Embankment elev.: 5649.25 As Built Pond Bottom elev.: 5639.7 <br />As Built Pond Emergency Spillway elev.: NA As Built Pond Primary Spillway elev.: <br />As Built Pond Capacity (pond bottom to primary spillway) per As Built 4.7 ac -ft <br />Existing Pond Capacity (pond bottom to primary spillway): As Built Volume - SV = 4.67 ac -ft <br />Sediment Volume (SV) at Inspection: length 90 ft X width 50 ft X depth 0.3 ft = .03 ac -ft <br />Surface Water elev. 5640.4 - As Built Pond Bottom elev. 5639.7 =Water Depth 0.7 ft <br />Water Volume (WV) in Pond 0.2 ac -ft (using as built capacity table & surface water el( <br />subtracting sediment volume under water level) <br />Pond Capacity Available below primary spillway 4.47 ac -ft [As Built Pond Capacity — W <br />Inflow volume from 10 -yr 24 -hr storm runoff event 1.65 ac -ft <br />Circle or Write appropriate Response <br />1. Seepage (specify location, color, and approx. volume) Yes <br />2. Cracks or scarps on crest or slopes Yes <br />3. <br />4. <br />5. <br />6. <br />7. <br />8 <br />a <br />E[r1 <br />Sloughing or bulging on slopes <br />Major erosion problems <br />Surface movements in valley bottom or on hil <br />Water impounded against <br />Clogging <br />Yes <br />Yes <br />Yes <br />Yes <br />5647.2 <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />a) Spillway channels and pipes <br />Yes�J <br />N/A <br />b) Decant system <br />Yes <br />ro <br />N/A <br />C) Diversion Ditches <br />Yes <br />IGS <br />VV <br />N/A <br />Cracking or crushing of pipes <br />a) Spillway pipes <br />Yes <br />N/A <br />b) Decant system <br />Yes <br />N/A <br />Trash racks clear and in place <br />'As) <br />No <br />N/A <br />Monitoring instrumentation <br />Yes <br />No <br />Imm <br />Comments: Minor sediment accumulation (90 ft L, 50 ft W, & 0.3 ft deep) = 0.03 ac -ft, unchanged in 2015 <br />M:\ENG\NH2\Env\Pond Exams & Insp\2016_03 Annual Impoundment Inspections.doc <br />