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PERIODIC INSPECTION FORM Water, Sediment, or Slurry Impoundments INSPECTOR'S NAME: Dennis Jones DATE: I O 'IZ ' ~ NPDES I.D. NO.: CG-0000221 D.P. 015 OZf ~' ' ~3 FACILITY CONFIGURATION: Cross-Vallev Pond DATE LAST ~ o INSPECTION: O SITE NAME: Pond #015 LOCATION: NE'/, SEA/„ Sec. 23 TSN, R88W MINE NAME: Seneca II-W Mine (Seneca Coal Co) LOCATION: 8 mi. S of Hayden CO MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Gregg Kitchen, Gen Mgr Circle or write in a»oropriate response 19 120 Foundation preparation (removal of vegetation, stumps, topsoil: Yes Lift thickness: 12 Compaction according Co approved plan: Yes Burning (specify extent and location): No Angle of slope: 2.5:1 upstream, 3.5:1 downstream Total = 6:1 *Seepage (specify location, color, and approximate volume) From underdrain pipes: NLA At isolated points on embankment slopes: Yes No N/A At natural hillside: Yes No N/A Over widespread areas: Yes No N/A From downstream foundation area: Yes No N/A "Boils" beneath stream or ponded water: Yes No N/A Cracks or scarps on crest: Yes No N/A Cracks or scarps on slope: Yes No N/A Sloughing or bulging on slope: Yes No N/A *Maj or erosion problems: Yes No N/A Surface movements in valley bottom or on hillside: Yes No N/A *Erosion of toe: Yes No N/A *Water impounded against toe: Yes N/A Existing embankment freeboard: (normal = 4.0') y.5 feet Increase Decrease in water level: Lto~arN..Q_ feet Cracks, bulging, or erosion on upstream face: Yes Nf N/A Visible sumps or sinkholes in slurry surface: *Clogging Spillway channels and pipes: Yes No N{A Decant system: NL Diversion ditches: 1A *Cracking or crushing of pipes / Spillway pipes: C.....lae...~ S~eAS 602 / ~'~+:{w Ye No N/A Decant system: N A Trash racks clear and in place: Yes No N/A *Maj or 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.