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PERIODIC INSPECTION FORM <br />Water, Sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Tom Wainwright DATE: 06/07/94 <br />NPDES I.D. NO.: N/A <br />FACZLITY CONFIGURATION: Final Pit Impoundment DATE LAST INSPECTION: 03/29/94 <br />SITE NAME: PeCOCO Reservoir LOCATION: NWT, Sec. 2, T6N, R87W <br />MINE NAME: Seneca Mine (Peabody Coal Co.) LOCATION: 7.1 mi. SE of Hayden, CO <br />MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Supt. <br />Circle Or write in aopropriate response <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes No <br />2. Lift thickness: inches <br />3. Compaction according to approved plan: es No <br />4. Burning (specify extent and location): Yes No <br />5. Angle of slope (degrees) degrees <br />6. *Seepage (specify location, color, and approximate volume) <br />From underdrain pipes: Yes No <br />At isolated points on embankment slopes: Yes o <br />At natural hillside: Yes <br />Over widespread areas: Yes o <br />From downstream foundation area: Yes o <br />"Boils" beneath stream or ponded water: Yes No <br />7. Cracks or scarps on crest: Yes ©o <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: 5.5 feet <br />15. Increase Decrease in water level: No change feet <br />16. Cracks, bulging, or erosion on upstream face: Yes No <br />17. Visible sumps or sinkholes in slurry surface: Yes ~o <br />18. *Clogging <br />Spillway channels and pipes: Yes No <br />Decant system: Yes o <br />Diversion ditches: Yes o <br />19. ^Cracking or crushing of pipes <br />Spillway pipes: Yes No <br />Decant system: Yes o <br />20. Trash racks clear and in place: 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 space on <br />the back of this sheet. <br />