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ANNUAL IMPOUNDMENT INSPECTION FORM <br />Mine: New Horizon 2 Mine <br />Pond Name: Pond 012 <br />NPDES Permit & Outfall #s: CO- 0000213 <br />Date Inspected: 20- March -2015 <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: 4- November -2014 <br />Legal Location: Sec 36 of T47N R16W <br />Inspector's Name: Frank Ferris <br />Pond Capacity Data <br />As Built Pond Embankment elev.: 5608.5 As Built Pond Bottom elev.: 5596.5 <br />As Built Pond Emergency Spillway elev.: NA As Built Pond Primary Spillway elev.: 5606.5 <br />As Built Pond Capacity (pond bottom to primary spillway) per As Built 4.9 ac -ft <br />Existing Pond Capacity (pond bottom to primary spillway): As Built Volume - SV = 4.72 ac -ft <br />Sediment Volume (SV) at Inspection: 3 areas = .18 ac -ft <br />Surface Water elev. Dry - As Built Pond Bottom elev. 5596.5 = Water Depth NA <br />Water Volume (WV) in Pond Dry (using as built capacity table & surface water elevation, <br />subtracting sediment volume under water level) <br />Pond Capacity Available below primary spillway 4.72 ac -ft [As Built Pond Capacity — WV - <br />inflow volume from 10 -yr 24 -hr storm runoff event 3.41 ac -ft <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 <br />8 <br />a <br />Clogging <br />a) Spillway channels and pipes <br />b) Decant system <br />C) Diversion Ditches <br />Cracking or crushing of pipes <br />a) Spillway pipes <br />b) Decant system <br />Trash racks clear and in place <br />10. Monitoring instrumentation <br />Yes <br />N/A <br />Yes <br />o <br />N/A <br />Yes <br />kle <br />N/A <br />Yes <br />N/A <br />Yes <br />'LV <br />N/A <br />Yes <br />l <br />N/A <br />Yes <br />N/A <br />Yes <br />6�6 <br />N/A <br />Yes <br />N6 <br />N/A <br />Yes <br />N/A <br />Yes <br />N/A <br />Chi'' <br />No <br />N/A <br />Yes <br />No <br />N� <br />Comments: Sediment accumulation in 3 areas = 0.18 ac -ft. Tumble weeds were in west entry culvert and <br />were burned. Minor erosion at base of inlet half culvert at NW corner <br />M: \ENG \NH2 \Env \Pond Exams & Insp \2015_03 Pond Examination.doc <br />