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<br />PERIODIC INSPECTION FORM <br />Water, Sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Michael G. Altavilla DATE: 09/22/94 <br />NPDES I.D. NO.: CO-0000221 D.P. 003 <br />FACILITY CONFIGURATION: Diked Pond DATE LAST INSPECTION: 06/07/94 <br />SITE NAME: Northwest Impoundment #003 LOCATION: SE~r SW's, Sec. 27, T6N, RB7W <br />MINE NAME: Seneca Mine !Peabody Coal Col LOCATION: 7.1 mi. SE of Hayden, CO <br />MINE I.D. NO.: CMLRD Permit No. C-005-80 OWNER'S REP.: Scott Williams, Supt. <br />Circle or write in appropriate YeSDODSe <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes,' No N/A <br />2. Lift thickness: 12 in. N/A <br />3. Compaction according to approved plan: Y se ) No N/A <br />4. Burning (specify extent and location): Yes ~ N/A <br />5. Angle of elope: 2:1 upstream, 3:1 downstream Total = 5:1 N/A <br />6. *Seepage (specify location, color, and approximate volume) <br /> From underdrain pipes: Yes No N/1Y <br /> At isolated points on embankment slopes: Yes ~No! A <br /> At natural hillside: Yes mid N/A <br /> Over widespread areas: Yes ~Ia N/A <br /> From downstream foundation area: Yes ~a~ N/A <br /> "Boils" beneath stream or ponded water: Yes CNo; N/A <br />7. Cracks or scarps on crest: Yes (~o~ N/A <br />8. Cracks or scarps on elope: Yes ~N`o' N/A <br />9. Sloughing or bulging on slope: Yes ~ N/A <br />10. *Major erosion problems: Yes ~No, N/A <br />11. Surface movements in valley bottom or on hillside: Yes ~ N/A <br />12. *Erosion of toe: Yes QJ,o~ N/A <br />13. *Water impounded against toe: Yes Nod N/A <br />14. Existing embankment freeboard: 4.8 feet <br />15. Increase Decrease in water level: No chanoe ~ feet <br />16. Cracks, bulging, or erosion on upstream face: Yes moo, N/A <br />17. Visible sumps or sinkholes in slurry surface: Yes No ~Ai <br />18. *Clogging <br /> Spillway channels and pipes: Yes acv N/A <br /> Decant system: Yes No ~P.- <br /> Diversion ditches: Yes LN~ N/A <br />19. *Cracking or crushing of pipes <br /> Spillway pipes: Yes Jo N/A <br /> Decant system: Yes No Q3%A <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 space on <br />the back of this sheet. <br />