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PERIODIC INSPECTION FORM <br />Water, Sediment, or Slurry ImpounQdmelnlts <br />INSPECTOR'S NAME: Dennis Jones DATE: (-~ 1'~ <br />NPDES I.D. NO.: N/A r_~O_O [' <br />FACILITY CONFIGURATION: Cross-Vallev Pond DATE LAST INSPECTION: S J <br />SITE NAME: Pond #O11A LOCATION: SW'/. NW'/. Sec. 16, TSN, R87W <br />MINE NAME: Yoast Mine (Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO <br />MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Grea4 Kitchen, Gen Mgr <br />1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12 <br />13 <br />14 <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />Circle or write in aooropriate response <br />Foundation preparation (removal of vegetation, stumps, topsoil: Yes <br />Lift thickness: <br />Compaction according to approved plan: <br />Burning (specify extent and location): <br />Angle of slope: 3.0:1 upstream, 3.0:1 downstream <br />*Seepage (specify location, color, and approximate volume) <br />From underdrain pipes: <br />At isolated points on embankment slopes: <br />At natural hillside: <br />Over widespread areas: <br />From downstream foundation area: <br />"Boils" beneath stream or ponded water: <br />Cracks or scarps on crest: <br />Cracks or scarps on slope: <br />Sloughing or bulging on slope: <br />*Major erosion problems: <br />Surface movements in valley bottom or on hillside: <br />*Erosion of toe: <br />*Water impounded against toe: <br />Existing embankment reeboard: (normal = 4.5') <br />Increase Decrease in water level: <br />Cracks, bulging, or erosion on upstream face: <br />visible sumps or sinkholes in slurry surface: <br />*Clogging <br />Spillway channels and pipes: <br />Decant system: <br />Diversion ditches: <br />*Cracking or crushing of pipes <br />Spillway pipes; <br />Decant system: <br />Trash racks clear and in place: <br />_ in. <br />Yes <br />No <br />Total = 6.0:1 <br />N A <br />Yes No N/A <br />Yes No N/A <br />Yes No N/A <br />Yes o N/A <br />Yes No N/A <br />Yes No N/A <br />Yes No N/A <br />Yes No N/A <br />Yes o N/A <br />Yes o N/A <br />Yes o N/A <br />Yes o N/A <br />~3 feet <br />o~~ fe <br />et <br />Yes ~ <br />-~ <br />~) N/A <br /> <br />Yes ~o~ N/A <br /> ~..~~ <br />1A <br />Yes No <br />N A <br />es No <br />*Major adverse changes in these items could cause instability and should be reported to <br />the Engineering Manager and Mine Superintendent for further evaluation. Adverse <br />conditions noted in these items should normally be described (extent, location, volume, <br />etc.) in the space on the back of this sheet. <br />