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PERIODIC INSPECTION FORM <br />Water, Sedimeat, or Slurry Impoundments <br />INSPECTOR'S NAME: Michael Alt avil7a DATE: 03/23/98 <br />NPDES I.D. NO.: c0-0000221 D.P. 0 10 <br />FACILITY CONFIGURATION: Croea-Valle y Pond DATE LAST INSPECTION: 12/1797 <br />SITE NAME: Pond CO10 LOCATION: NWk NEi( Sec_ 8 T5N R87W <br />MINE NAME: ~'oaa Min (c n a oal o) LOCATION: 8.5 mi. aE of Hayes. CO <br />MINE I.D. NO.: eMi.Rn permit No_ C-9 4-OB2 OWNER'S REP.: Brad Rrown, Gen Mqr <br />1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />Foundation preparation (removal of vegetation, stumps, topsoil: <br />Lift thickness: <br />Compaction according to approved plan: <br />Burning (specify extent and location): <br />Angle of elope: 3.75:1 upstream, 3.75:t downstream <br />*Seepage (specify location, color, and approximate volume) <br />From underdrain pipes: <br />At isolated points on embankment slopes: <br />At natural hillside: <br />Over widespread areas: <br />From downstream foundation area: <br />"boils" beneath stream or ponded water: <br />7. Cracks or scarps on crest: <br />8. Cracks or scarps on slope: <br />9. Sloughing or bulging on elope: <br />10. *Major erosion problems: <br />11. Surface movements in valley bottom or on hillside: <br />12. *Eroeion of toe: <br />13. <br />14. <br />15. <br />16. <br />17. <br />18. <br />19. <br />20 <br />*Water impounded against toe: <br />Existing embankment freeboard: Annroxi~ately <br />Increase Decrease in water level: No change <br />Cracks, bulging, or erosion on upstream face: <br />Visible sumps or sinkholes in slurry 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 />feet <br />Yea ~ N/A <br />Yea No <br />Yea ~ N A <br />Yes No / <br />Yee No N/A <br />Yes No N A <br />Yee No <br />Yes No N <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 o£ this sheet. <br />Yes No <br />~_ in <br />Ye No <br />Yea No <br />Total = 7_..5_:1 <br />Yes o <br />Yea o <br />Yes o <br />Yes o <br />Yes o <br />Yee o <br />Yes o <br />Yee <br />Yee <br />Yee o <br />Yee <br />Yee <br />Yee <br />lo.D feet <br />N/A <br />N/A <br />N/A <br />/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 />