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PERIODIC INSPECTION FORM <br />Water, Sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Dennis Jones <br />NPDES I.D. NO.: N/A <br />FACILITY CONFIGURATION: Final Pit Impoundment <br />SITE NAME: PeaCoCo Reservoir <br />MINE NAME: Peabody Sage Creek Mine <br />MINE I.D. NO.: CDRMS Permit No. C-2009-087 <br />DATE: 10-(3- 10 <br />DATE LAST INSPECTION: <br />LOCATION: SW1/4 NW/4, Sec. 2, TSN, R87W <br />LOCATION: 7.1 mi. SE of Hayden, CO <br />OWNER'S REP.: Mike Ludlow <br />Circle or write in appropriate response <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: - Yes <br />2. Lift thickness: inches <br />3. Compaction according to approved plan: Yes <br />4. Burning (specify extent and location): No <br />5. Angle of slope (degrees) degrees <br />6. *Seepage (specify location, color, and approximate volume) <br /> From underdrain pipes: N/A <br /> At isolated points on embankment slopes: Yes No <br /> At natural hillside: Yes No <br /> Over widespread areas: Yes No <br /> From downstream foundation area: Yes No <br /> "Boils" beneath stream or ponded water: Yes No <br />7. Cracks or scarps on crest: Yes No <br />8. Cracks or scarps on slope: Yes No <br />9. Sloughing or bulging on slope: Yes No <br />10. *Major erosion problems: Yes No <br />11. Surface movements in valley bottom or on hillside: Yes No <br />12. *Erosion of toe: Yes No <br />13. *Water impounded against toe: Yes No <br />14. Existing embankment freeboard: (normal = 6.11) ?.? feet <br />15. Increase Decrease in water level: k4> C- 1,.!4 feet <br />? <br />16. Cracks, bulging, or erosion on upstream face: Yes N <br />17. Visible sumps or sinkholes in slurry surface: N/A <br />18. *Clogging <br /> Spillway channels and pipes: Yes <br /> Decant system: N/A <br /> Diversion ditches: N/A <br />19. *Cracking or crushing of pipes <br /> Spillway pipes: Yes <br /> Decant system: N/A <br />20. Trash racks clear and in place: N/A <br />21. Discharge rate (gpm) Wc,4?a 0. CA oki Q- <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 in <br />these items should normally be described (extent, location, volume, etc.) in the space on the <br />back of this sheet. <br />C-1 e C-4-k., aJ o <br /> <br /> <br />