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PERIODIC INSPECTION FORK <br />. Water, Sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Tom Wainwrioht DATE: 09/21/93 <br />NPDES I.D. NO.: N/A <br />FACILITY CONFIGURATION: Final Pit Imooundment DATE LAST INSPECTION: 06/11/93 <br />SITE NAME: PeCOCO Reservoir LOCATION: NW(., Sec. 2, T6N, R87W <br />MINE NAME: Seneca Mine (Peabody Coal Co.1 LOCATION: 7.1 mi. SE of Hayden, CO <br />MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Suot. <br />C1YCle Or write is aDDYODrlate re6DOII80 <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: <br />2. Lift thickness: <br />3. Compaction according to approved plan: <br />4. Burning (specify extent and location): <br />5. Angle of elope (degrees) <br />6. *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 area: <br />"Boils" beneath stream or ponded water: <br />7. Cracks or scarps on crest: <br />8. Cracks or scarps on elope: <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. *Water impounded against toe: <br />14. Existing embankment freeboard: <br />15. Increase X Decrease in water level: <br />16. Cracks, bulging, or erosion on upstream face: <br />17. Visible sumps or sinkholes in slurry surface: <br />18. *Clogging <br />Spillway channels and pipes: <br />Decant system: <br />Diversion ditches: <br />19. *Cracking or crushing of pipes <br />Spillway pipes: <br />Decant system: <br />20. Trash racks clear and in place: <br />es No <br /> inches <br />es No <br />Yes <br /> degrees <br />Yes o <br />Yee <br />Yes <br />Yee <br />Yee <br />Yee <br />Yee <br />Yee <br />Yes <br />Yee <br />Yea <br />Yee Q <br />Yee <br />5.5 feet <br />0.5 feet <br />Yee <br />Yee <br />Yee <br />Yes <br />Yes <br />Yee X10 <br />Yes <br />es No <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 />