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PERIODIC INSPECTION FORM <br />Water, sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Michael A evil a DATE: 12/99 <br />NPDES I.D. NO.: CO-0000221 ^.P_ 009 <br />FACILITY CONFIGURATION: cross-Valley Pond DATE LAST INSPECTION: Oo/~/44 <br />SITE NAME: Pond i`009 LOCATION: cFi~ aWS~ cP~r. 7,t, TSN~ a88W <br />MINE NAME: Seneca ii-W Mine (Seneca Coal Col LOCATION: 8 m+_ S of Hayden CO <br />MINE I.D. NO.: C i.an P mi No. -8 -OS7 OWNER'S REP.: Brad Brown Gen Mq~- <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: Ye No x/A <br />2. Lift thickness: 12- in. N/A <br />3. Compaction according to approved plan: ~ No N/A <br />4. Burning (specify extent and location): Yes No <br />5. Angle of elope: 3:1 upstream, 3:1 downstream Total = 6:1 N/A <br />6. *Seepage (specify location, color, and approximate volume) <br /> From underdrain pipes: Yes No <br /> At isolated points on embankment slopes: Yes ® N/A <br /> At natural hillside: Yes o N/A <br /> Over widespread areas: Yee o N/A <br /> From downstream foundation area: Yee o N/A <br /> "Boils" beneath stream or ponded water: Yee o N/A <br />7. Cracks or ecarpe on crest: Yee o N/A <br />B. Cracks or ecarpe on elope: Yes No N/A <br />9. Sloughing or bulging on elope: Yes No N/A <br />10. *Major erosion problems: Yee o N/A <br />11. Surface movements in valley bottom or on hillside: Yee o N/A <br />12. *Eroeion of toe: Yes No N/A <br />13. *Water impounded against toe: Yee No N/A <br />14. Existing embankment freeboard: Anoroxi.mately 9.4 feet <br />15. Increase Decrease in water level: xo change feet <br />16. Cracks, bulging, or erosion on upstream face: Yee ® N A <br />17. Visible sumps or sinkholes in slurry surface: Yea No N <br />18. *clogging <br /> Spillway channels and pipes: Yes ~ N/A <br /> Decant system: Yes No <br /> Diversion ditches: Yee No <br />19. *Cracking or crushing of pipes <br /> Spillway pipes: Yes ~ N A <br /> Decant system: Yes No <br />20. Trash racks clear and in place: es No N/A <br />*Major adverse changes in these items could cause instability and should be reported to the <br />Engineering Manager and Mine Superintendent for further evaluation. Adverse conditions noted <br />in these items should normally be described (extent, location, volume, etc.) in the apace on <br />the back of this sheet. <br />