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2016 ANNUAL IMPOUNDMENT INSPECTION <br />Mine: New Horizon 2 Mine <br />Pond Name: Pond 007 <br />NPDES Permit & Outfall #s: CO -0000213 <br />Date Inspected: 2 -March -2016 <br />Location Description: One mile West 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 6 of T46N R15W <br />Inspector's Name: Frank Ferris <br />Pond Capacity Data <br />Surveyed Pond Embankment elev.: 5648.9 As Built Pond Bottom elev.: 5631.0 <br />Surveyed Pond Emergency Spillway elev.: 5646.8 As Built Pond Primary Spillway elev.: 5645.4 <br />As Built Pond Capacity (pond bottom to primary spillway) per As Built 36.0 ac -ft <br />Existing Pond Capacity (pond bottom to primary spillway): As Built Volume - SV = 35.95 ac -ft <br />Sediment Volume (SV) at Inspection: length ft X width ft X depth AutoCAD ft = .05 ac -ft <br />Surface Water elev. 5637.9 - As Built Pond Bottom elev. 5631.0 = Water Depth 6.9 feet <br />Water Volume (WV) in Pond 8.59 ac -ft (using as built capacity table & surface water elevation <br />subtracting sediment volume under water level) <br />�. •.� K. <br />Pond Capacity Available below primary spillway 27.41 ac -ft [As Built Pond Capacity — WV +��•'� <br />Inflow volume from 10 -yr 24 -hr storm runoff event 27.85 ac -ft <br />0 <br />Circle or Write appropriate Response <br />1. Seepage (specify location, color, and approx. volume) <br />2. Cracks or scarps on crest or slopes <br />3. Sloughing or bulging on slopes <br />4. Major erosion problems <br />5. Surface movements in valley bottom or on hillside <br />6. Water impounded against toe <br />7. Clogging <br />a) Spillway channels and pipes <br />b) Decant system <br />C) Diversion Ditches <br />8. Cracking or crushing of pipes <br />a) Spillway pipes <br />b) Decant system <br />9. Trash racks clear and in place <br />10. Monitoring instrumentation is in place and functioning <br />Yes f® N/A <br />Yes lA N/A <br />Yes A*o N/A <br />Yes 0 N/A <br />Yes V N/A <br />Yes 9 N/A <br />Yes L9 N/A <br />Yes 9 N/A <br />Yes 4 N/A <br />Yes tq N/A <br />No N/A <br />Y® No N/A <br />Comments: No change in sediment accumulation from 2015 & outlet bypass leak plugged <br />M:\ENG\NH2\Env\Pond Exams & Insp\2016_03 Annual Impoundment Inspections.doc <br />IG <br />