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2017 ANNUAL IMPOUNDMENT INSPECTION <br />Mine: New Horizon 2 Mine <br />Pond Name: Pond 015 <br />NPDES Permit & Outfall #s: CO -0000213 <br />Date Inspected: 25 -October -2017 <br />Location Description: —2 miles 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: 2 -March -2016 <br />Legal Location: Sec 36 of T47N R16W <br />Inspector's Name: Frank Ferris <br />Pond Capacity Data <br />As Built Pond Embankment elev.: 5671.0 Surveyed Pond Bottom elev.: 5560.7 <br />As Built Pond Emergency Spillway elev.: NA As Built Pond Primary Spillway elev.: NA <br />As Built Pond Capacity (pond bottom to top of embankment) per As Built 0.94 ac -ft <br />Existing Pond Capacity (pond bottom to top of embankment): As Built Volume - SV = 0.94 ac -ft <br />Sediment Volume (SV) at Inspection: length ft X width ft X depth ft = NA ac -ft <br />Surface Water elev. Dry - As Built Pond Bottom elev. 5660.0 = Water Depth NA <br />Water Volume (WV) in Pond Dry (using as built capacity table & surface water elevation, and then <br />subtracting sediment volume under water level) <br />Pond Capacity Available 0.94 ac -ft [As Built Pond Capacity — WV — SV] <br />Inflow volume from 100 -yr 24 -hr storm runoff event 0.508 ac -ft <br />Since the sediment volume between elevations 5560.0 to 5560.7 is less than .005 ac ft, the volume <br />does not show in the calculations. <br />Circle or Write appropriate Response <br />1. Seepage (specify location, color, and approx. volume) <br />Yes <br />2. Cracks or scarps on crest or slopes Yes <br />3. <br />4. <br />5. <br />6. <br />7. <br />8. <br />9 <br />10. <br />Sloughing or bulging on slopes Yes <br />Major erosion problems Yes <br />Surface movements in valley bottom or on hillside Yes <br />Water impounded against toe Yes <br />Clogging <br />a) <br />Spillway channels and pipes <br />b) <br />Decant system <br />C) <br />Diversion Ditches <br />Cracking <br />or crushing of pipes <br />a) <br />Spillway pipes <br />b) <br />Decant system <br />Trash <br />racks clear and in place <br />Monitoring instrume <br />X <br />to <br />Ix <br />Yes No <br />Yes No <br />Yes lX <br />Yes No <br />Yes No <br />Yes No <br />Yes No <br />Comments: The pond elevations indicate less than .005 ac -ft of sediment accumulation. <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />FXA <br />Vk <br />N/A <br />N <br />�vAS. <br />M:\New Horizon 2\Environmental\Pond Inspections & Examinations\2017_10 Annual Impoundment Inspections.doc <br />