HYDRO27984

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 10/24/2005
• Doc Name: 3rd Quarter 2005 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PHRIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
~ Q
INSPECTOR' S NAME: Dennis Jones
•
DATE:
J
NPDES I.D. NO.: CO-0000221 D.P. 011
~ ,O~
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECT ION:
SITE NAME: Pond #011 LOCATION: NEi/. SWi/„ Sec. 16. TSN. R87W
MINE NAME: Yoast Mine (Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Gre q_g Kitchen. Gen Mgr
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Circle or write in appropriate response
Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 8 in.
Compaction according to approved plan: Ye s
Burning (specify extent and location): No
Angle of slope: 3.0:1 upstream, 2.8:1 downstream Total = 5.8 :1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No N/A
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 N N/A
Sloughing or bulging on slope: Yes N N/A
*Major erosion problems: Yes N N/A
Surface movements in valley bottom or on hillside: Yes N N/A
*Erosion of toe: Yes N N/A
*Water impounded against toe: Yes N/A
Existing embankment freeboard: (normal = 5.1') /0_~ feet
Increase 'f Decrease in water level: S feet
Cracks, bulging, or erosion on upstream face: Yes No N/A
Visible sumps or sinkholes in slurry surface: N[A
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yes ~ N/A
NL
NLA
Yes No N/A
NL
~ yu
*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.