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PERIODIC INSPECTION FORM <br />Water, Sediment, or Slurry Impoundments <br />INSPECTOR'S NAME: Dennis Jones <br />NPDES I.D. NO.: CO-0000221 D.P. 005 <br />FACILITY CONFIGURATION: Cross-Valley Pond <br />SITE NAME: Pond #005 <br />MINE NAME: Seneca II-W Mine (Seneca Coal Co <br />MINE I.D. NO.: CMLRD Permit No. C-82-057 <br />DATE: Cr_a v 'V <br />DATE LAST INSPECTION: ( -9 - I D <br />LOCATION: NWT/ SWl/,, Sec. 10, TSN, R88W <br />LOCATION: 8 mi. S of Hayden, CO <br />OWNER'S REP.: Roy Karo, Gen Mgr <br />Circle or write in appropriate response <br />1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes <br />2. Lift thickness: 12 in. <br />3. Compaction according to approved plan: Yes <br />4. Burning (specify extent and location): No <br />5. Angle of slope: 3.5:1 upstream, 2.5:1 downstream Total = 6:1 <br />6. *Seepage (specify location, color, and approximate volume) <br /> From underdrain pipes: ©l1(• IGL, b y-". " es No N/A <br /> At isolated points on embankment slo es: Yes N/A <br /> At natural hillside: Yes N/A <br /> Over widespread areas: Yes N/A <br /> From downstream foundation area: Yes N/A <br /> "Boils" beneath stream or ponded water: Yes N/A <br />7. Cracks or scarps on crest: Yes I N/A <br />8. Cracks or scarps on slope: Yes N/A <br />9. Sloughing or bulging on slope: Yes N/A <br />10. *Major erosion problems: Yes N/A <br />11. Surface movements in valley bottom or on hillside: Yes N/A <br />12. *Erosion of toe: Yes N/A <br />13. *Water impounded against toe: Yes N N/A <br />14. Existing embankment freeboard: (normal = 7.41) g•r( feet <br />15. Increase _LI/ Decrease in water level: feet <br />16. Cracks, bulging, or erosion on upstream face: Yes NG N/A <br />17. Visible sumps or sinkholes in slurry surface: N/A <br />18. *Clogging <br /> Spillway channels and pipes: Yes I?YB` N/A <br /> Decant system: Inoperable Vogg No N/A <br /> Diversion ditches: N/A <br />19. *Cracking or crushing of pipes <br /> Spillway pipes: Yes '? N/A <br /> Decant system: Inoperable Ygc NQ N ,!n <br />20. Trash racks clear and in place: Yes No N/A <br />21. Discharge rate (gpm) A04 e-Ue- <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.