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2017 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.: Frank Ferris, Mine Manager <br />Pond Type: Partly Incised <br />CDRM & S #: C-1981-008 <br />Date Last Examined: 18 -October -2016 <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. 5639.7 - As Built Pond Bottom elev. 5631.0 = Water Depth 8.7 feet <br />Water Volume (WV) in Pond 11.3 ac -ft (using as built capacity table & surface water elevation, and then <br />subtracting sediment volume under water level) <br />Pond Capacity Available below primary spillway 24.6 ac -ft [As Built Pond Capacity — WV — SV) <br />Inflow volume from 10 -yr 24 -hr storm runoff event 27.85 ac -ft <br />Circle or Write appropriate Response <br />1. <br />Seepage (specify location, color, and approx. volume) <br />Yes <br />tX <br />N/A <br />2. <br />Cracks or scarps on crest or slopes <br />Yes <br />AI�S/ <br />N/A <br />3. <br />Sloughing or bulging on slopes <br />Yes <br />AIS <br />N/A <br />4. <br />Major erosion problems <br />Yes <br />N/A <br />5. <br />Surface movements in valley bottom or on hillside <br />Yes <br />N/A <br />6. <br />Water impounded against toe <br />Yes <br />N/A <br />7. <br />Clogging <br />a) Spillway channels and pipes <br />Yes <br />N/A <br />b) Decant system <br />Yes <br />I <br />N/A <br />C) Diversion Ditches <br />Yes <br />N/A <br />8. <br />Cracking or crushing of pipes <br />a) Spillway pipes <br />Yes <br />N/A <br />b) Decant system <br />Yes <br />IM <br />N/A <br />9. <br />Trash racks clear and in place <br />YX <br />No <br />N/A <br />10. <br />Monitoring instrumentation is in place and functioning <br />YX <br />No <br />N/A <br />Comments: No change in sediment accumulation from 2015 <br />M:\New Horizon 2\Environmental\Pond Inspections & Examinations\2017_10 Annual Impoundment Inspections.doc <br />