2011-05-18_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/18/2011
• Doc Name: 1st Quarter 2011 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Stockponds or Sumps
INSPECTOR'S NAME: Dennis Jones
FACILITY CONFIGURATION: Stockpond
SITE NAME: ST-1
MINE NAME: Yoast Mine(Seneca Coal Cc
MINE I.D. NO.: C-94-082
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DATE : 3--.2,9- ft
DATE LAST INSPECTION:
LOCATION: SWV4, Sec 20, TSN, R87W
LOCATION: 8.5 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
Angle of slope: upstream, downstream
*Seepage (specify location, color, and approximate volume)
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or scarps on crest:
Cracks or scarps on slope:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against downstream toe:
Existing embankment freeboard:
Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Spillway erosion:
*Clogging
Spillway channels:
Diversion ditches:
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
feet
feet
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
*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.
Comments: Pond 8 feet deep from spillway
Ck ?, " ? ?,e 4 . (:,- ,-- C- -to- -5 %, W 1 k-3, ??
Total = N/A