Laserfiche WebLink
ANNUAL IMPOUNDMENT INSPECTION FORM <br />Mine: New Horizon 2 Mine <br />Pond Name: Pond 013 <br />NPDES Permit & Outfall #s: CO- 0000213 <br />Date Inspected: 20- February -2014 <br />Location Description: 2 miles 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 Inspected: 20- November -2013 <br />Legal Location: Sec 36 of T47N R16W <br />Inspector's Name: Frank Ferris <br />Pond Capacity Data <br />As Built Pond Embankment elev.: 5560.4 As Built Pond Bottom elev.: 5549.0 <br />As Built Pond Emergency Spillway elev.: 5557.0 As Built Pond Primary Spillway elev.: 5555.0 <br />As Built Pond Capacity (pond bottom to primary spillway) per As Built 6.4 ac -ft <br />Existing Pond Capacity (pond bottom to primary spillway): As Built Volume - SV = 6.38 ac -ft <br />Sediment Volume (SV) at Inspection: length 8 ft X width 35 ft X depth 3 ft = .02 ac -ft <br />Surface Water elev. 5551.8 - As Built Pond Bottom elev. 5549.0 = Water Depth 2.2 fe <br />Water Volume (WV) in Pond 2.18 ac -ft (using as built capacity table & surface water e <br />subtracting sediment volume under water level) <br />Pond Capacity Available below primary spillway 4.2 ac -ft (As Built Pond Capacity — WV <br />Inflow volume from 10 -yr 24 -hr storm runoff event 2.7 ac -ft <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 <br />Yes <br />3. Sloughing or bulging on slopes <br />Yes <br />4. Major erosion problems <br />Yes <br />S. Surface movements in valley bottom or on hillside <br />Yes <br />6. Water impounded against toe <br />Yes <br />7. Clogging <br />a) Spillway channels and pipes <br />Yes <br />b) Decant system YP <br />p <br />Yes <br />C) Diversion Ditches <br />Yes <br />8. Cracking or crushing of pipes <br />a) Spillway pipes <br />Yes <br />b) Decant system <br />Yes <br />9. Trash racks clear and in place <br />10. Monitoring instrumentation Flume in place & functioning r e <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />IFS N/A <br />1C0 N/A <br />tD N/A <br />N/A <br />N/A <br />No N/A <br />No N/A <br />Comments: Sediment accumulation was observed & estimated in the east end of the pond (8x35x3.S). <br />Embankment mowed. <br />M: \ENG \NH2 \Env \Pond Exams & Insp \2015_03 Pond Examination.doc <br />1} <br />