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PERIODIC INSPECTION FORK <br />Yater, Sediment, or Slurry Impoundments <br />INSPEC70R'S NAME: Ron Gehrke <br />NPDES I.D. NO.: / <br />FACILITY CONFIGURATION: Fina Ptt Impoun ment_ <br />SITE NAME: PeCoCo Reservoir <br />MINE NAME: Seneca Mine (Pea o v Coa ComDanV) <br />MINE I.D. NO.: CMLRD Permit No. C-82-057 <br />DATE: 05/27/92 <br />DATE LAST INSPECTION: 03/18/92 <br />LOCATION: <br />LOCATION: mt o Hav en. CO <br />OWNER'S REP.:Scott Williams, Supt. <br />Circle or write in aoorooriate resoonse <br />1. Foundation preparation (removal of vegetation, stumps, topsoil?) Yes No <br />2. Lift thickness (inches) 12 i nches <br />3. Compaction according to approved plan es No <br />4. Burning (specify extent and location) Yes No <br />5. Angle of slope (degrees) 18.6 degrees <br /> <br />6. * <br />Seepage (specify location, color, and approximate volume) <br /> From underdrain pipes Yes ~ <br /> At isolated points on em an ment s opes Yes o <br /> At natural hillside Yes o <br /> Over widespread areas Yes o <br /> From downstream foundation area Yes <br /> "Boils" beneath stream or ponded water Yes <br />7. Cracks or scarps on crest Yes <br />8. Cracks ar scarps on slope Yes ~o <br />9. Sloughing or bulging on slope Yes NUo <br />10. *Major erosion problems Yes ®o <br />11. Surface movements in valley bottom or on hillside Yes Jo <br />12. *Erosion of toe Yes ©o <br />13. *Water impounded against toe Yes No <br />14. Existing embankment freeboard (feet) See comments 5 feet <br />15. Increase X Decrease in water level (feet) 0.5 feet <br />16. Cracks, bulging, or erosion on upstream face Yes No <br />11. Visible sumps or sinkholes in slurry surface Yes No <br /> <br />18. * <br />Clogging <br /> Spillway channels and pipes See comments Yes <br /> Decant system Yes <br /> Diversion ditc es Yes No <br />19 *Cracking or crushing o pipes <br /> Spillway pipes Yes <br /> Decant system Yes No <br />20. Trash racks clear and in place Yes No <br />* <br />Ma <br />jor adverse changes in these items could cause instability and should be reported <br />to the <br />Eng ineering Manager and Mine Superintendent for further evaluation. Adverse conditi ons note <br />in these items should normally be described (extent, location, volume, etc.) in the space on <br />the back of this sheet. <br />