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<br />PERIODIC INSPECTION FORM <br />Water, Sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Michael Altav971a DATE: 09/23/97 <br />NPDES I.D. NO.: CO-0000221 ^.P. 005 <br />FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 06/27/97 <br />SITE NAME: Pond #005 LOCATION: NWT SW~. Sec. 10 TSN R88W <br />MINE NAME: Seneca II-w Mine (Seneca Coal Col LOCATION: 8 mi. S of Hayden co <br />MINE I.D. NO.: CMi.Rn P m' No. --8 -057 OWNER'S REP.: Brad Brown, Gen Mar <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: es No N/A <br />2. Lift thic knees: _12._ in. N/A <br />3. Compaction according to approved plan: Yee No N/A <br />4. Burning (specify extent and location): Yes No N A <br />5. Angle of elope: 3.5:1 upstream, 2.5:1 downstream Total = 6:1 N/A <br />6. *Seepage (specify location, color, and approximate volume) <br /> From underdrain pipes: Yes No N~ <br /> At isolated points on embankment slopes: Yee o N/A <br /> At natural hillside: Yee No N/A <br /> Over widespread areas: Yes o N/A <br /> From downstream foundation area: Yes o N/A <br /> "Boils" beneath stream or ponded water: Yes N/A <br />7. Cracks or scarps on crest: Yes o N/A <br />B. Cracks or scarps on elope: Yes o N/A <br />9. Sloughing or bulging on slope: Yea o N/A <br />10. *Major erosion problems: Yee o N/A <br />11. Surface movements in valley bottom or on hillside: Yes o N/A <br />12. *Erosion of toe: Yes o N/A <br />13. *Water impounded against toe: Yes o N/A <br />14. Existing embankment freeboard: Approximately 7.4 feet <br />15. ~ Increase Decrease in water level: O.5 feet <br />16. Cracks, bulging, or erosion on upstream face: Yee ( o~ N/A <br />17. Visible sumps or sinkholes in slurry surface: Yee No <br />18. *Clogging <br /> Spillway channels and pipes: Yea (~ N A <br /> Decant system: Yes No <br /> Diversion ditches: Yea ®o N/A <br />19. *Cracking or crushing of pipes <br /> Spillway pipes: Yes ® N A <br /> Decant system: Yee No <br />20. Trash racks clear and in place: Yee 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 />