2012-02-21_HYDROLOGY - C1981008

• Permit No: C1981008
• IBM Index Class Name: Hydrology
• Doc Date: 2/21/2012
• Doc Name: 1st Quarter 2012 Sediment Pond Inspection Report
• From: Western Fuels Colorado
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: MLT
• Media Type: D
• Archive: No

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PERIODIC INSPECTION FORM
WATER, SEDIMENT, OR SLURRY IMPOUNDMENTS
Date: /¢ 4 zo /z
NPDES ID. No.:CO - 0000213 Date Last Inspected: 7,41
Facility Configuration:Incised Pond
Site Name: Impoundment #012 Location:47N16W Sec 36
Mine Name: New Horizon Mine Location:2 mi.NW of Nucla, CO.
Mine ID No.: CDMG Permit #0008 -81
Owners Rep.: R. L. Wade, Mine Manager
CIRCLE OR WRITE IN APPROPRIATE RESPONSE
1. Foundation Preparation (removal of vegetation, stumps., topsoil) 6) No N/A
2 Lift thickness (inches)
3. Compaction according to approved plan ® No N/A
4. Burning (specify extend and location) Yes N/A
5. Angle of slope: 3:1 upstream, 3:1 downstream
6. Seepage (specify location, color, and approx. volume)
a ) From underdrain pipes: Yes C.% N/A
b.) At isolated points on embankment slopes: Yes ® N/A
c) At natural hillside: Yes Q50 N/A
d) Over widespread areas Yes CEP N/A
e) From downsteam foundation area Yes ® N/A
f) "Boils” beneath stream or ponded water Yes ® N/A
7 Cracks or scarps on crest Yes <9 N/A
8. Cracks or scraps on slope Yes CEP N/A
9. Sloughing or bulging on slope Yes N/A
10. Major erosion problems Yes N/A
11. Surface movements in valley bottom or on hillside Yes 1� N/A
12. Erosion of toe Yes (a N/A
13. Water impounded against toe Yes p N® N/A
14. Existing embankment freeboard (feet) 5407 3—.559p, 5 g O Feet
15. Cracks, bulging, or erosion on upsteam face Yes ® N/A
16 Visible sumps or sinkholes in slurry surface Yes Cg N/A
17. Clogging
a) Spillway channels and pipes Yes N/A
b) Decant system Yes N/A
c) Diversion Ditches Yes (1› N/A
18 Cracking or crushing of pipes
a) Spillway pipes Yes ® N/A
b) Decant system Yes ill N/A
19 Trash racks clear and in place 0. No N/A
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