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:~ PERIODIC INSPECTION FORM Water, Sediment, or Slurry Impoundments INSPECTOR'S NAME: Michael Altavilla DATE: 06/26/95 NPDES I.D. NO.: COG-850008-002A FACILITY CONFIGURATION: Embankment Pond DATE LAST INSPECTION: 03/16/95 SITE NAME: Rail Looo Pond 2 LOCATION: SEy SWY.. Sec. 14, T6N. R88W MINE NAME: H-G Terminal, Inc. LOCATION: 2 mi. SE of Hayden. CO MINE I.D. NO.: CMLRD Permit No. C-92-081 OWNER'S REP.: Scott Williams, Gen Mar Circle or write in aooronriate resaonse 1 2 3 4. 5. 6. 7. 8. 9. 10 11 12 13 14 15 16 17 Burning (specify extent and location): Yes No N/A Angle of slope: 3.75:1 upstream, 2:1 downstream Total = 5.75:1 N/A •Seepage (specify location, color, and approximate volume) From underdrain pipes: Yes NS At isolated points on embankment slopes: Yes o N/A At natural hillside: Yes o N/A Over widespread areas: Yes o N/A From downstream foundation area: Yes o N/A "Boils" beneath stream or ponded water: Yes o N/A Cracks or scarps on crest: Yes No N/A Cracks or scarps on slope: Yes o N/A Sloughing or bulging on slope: Yes ©o N/A *Major erosion problems: Yes ~Io) N/A Surface movements in valley bottom or on hillside: Yes C~`V9[' N/A *Erosion of toe: Yes N/A +Water impounded against toe: Yes ~ o N/A Existing embankment freeboard: See comments 4 feet Increase X Decrease in water level: Aooroximately 1 feet Cracks, bulgin4, or erosion on upstream face: Yes 0 N A Visible sumps or sinkholes in slurry surface: Yes No *Clogging Spillway channels and pipes: Yes Decant system: Yes No Diversion ditches: Yea ® N/A *Crackinq or crushing of pipes Spillway pipes: Yes No Decant system: Yes No Trash racks clear and in place: Yes No *Major adverse changes in these items could cause instability and should be reported to the Engineering Manager and Mine Superintendent for further evaluation. Adverse conditions noted in these items should normally be described (extent, location, volume, etc.) in the space on the back of this sheet.