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<br />PERIODIC INSPECTION PORN <br />Water, Sadimeat, or Blurry Impovndmeats <br />INSPECTOR'S NAME: Michael Altav+lla DATE: ~~10/98 <br />NPDES I.D. NO.: CO-0000221 D.P. O 11 <br />FACILITY CONFIGURATION: Croce-Valle y Pond DATE LAST INSPECTION: 09/18/98 <br />SITE NAME: Pond i'011 LOCATION: N2dr Cwlr cpr~~l5 TSN R87w <br />MINE NAME: Yoaet Mine(Seneca Coal C o) LOCATION: 8.5 m±_ c8 Of Hayden, CO <br />MINE I.D. NO.: CMLBD Permit No_ C-9 4-082 OWNER'S REP.: Brad Brownf Gen Mqr <br />1. <br />2. <br />3. <br />4. <br />5. <br />6. <br />7. <br />B. <br />9. <br />10. <br />11. <br />12. <br />13. <br />14. <br />15. <br />16. <br />17. <br />18. <br />19 <br />20 <br />Foundation preparation (removal of vegetation, stumps, topsoil: es No <br />Lift thickness: ~_ in. <br />Compaction according to approved plan: Ye No <br />Burning (specify extent and location): Yee No <br />Angle of elope: 3.0:1 upstream, 2.e:1 downstream Total = S_8:1 <br />*Seepage (specify location, color, and approximate volume) <br />From underdrain pipes: <br />At isolated points on embankment elopes: <br />At natural hillside: <br />Over widespread areas: <br />From downstream foundation azea: <br />"Boils" beneath et ream or ponded water: <br />Cracks or scarps on crest: <br />Cracks or scarps on elope: <br />Sloughing or bulging on elope: <br />*Major erosion problems: <br />Surface movements in valley bottom or on hillside: <br />Yes <br />Yee <br />Yee <br />Yea <br />Yee <br />Yee <br />Yes <br />Yes <br />Yee <br />Yes <br />Yee <br />*Eroeion of toe: Yee <br />*Water impounded against toe: Yee <br />Existing embankment freeboard: AylproximatelX 17.5 <br />Increase Decrease in water level: NO change <br />Cracks, bulging, or erosion on upstream face: <br />Visible sumps or sinkholes in Blurry surface: <br />*Clogging <br />Spillway channels and pipes: <br />Decant system: <br />Diversion ditches: <br />*Cracking or crushing of pipes <br />Spillway pipes: <br />Decant system: <br />Trash racks clear and in place: <br />Yee <br />Yea <br />Yes <br />Yea <br />Yes <br />feet <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />N/A <br />feet <br />®o N A <br />No <br />®o N A <br />No <br />No <br />Yee ~ N A <br />Yee No N <br />Yee No ®A <br />*Major adverse changes in these items could cause instability and should be reported to <br />the Engineering Manager and Mine Superintendent for further evaluation. Adverse <br />conditions noted in these items should normally be described (extent, location, volume, <br />etc.) in the apace on the back of this sheet. <br />