2017-10-16_HYDROLOGY - C1981025

• Permit No: C1981025
• IBM Index Class Name: Hydrology
• Doc Date: 10/16/2017
• Doc Name: Quarterly Sediment Pond/Impoundment Report
• From: J.E. Stoiver & Associates, Inc
• To: DRMS
• Annual Report Year: 2017
• Report Quarter_Month: 3
• Email Name: CCW
• Email Name: DIH
• Media Type: D
• Archive: No

QUARTERLY POND INSPECTION REPORT
Operator: IMinrec, Inc. C-1981-025 Quarter: Third 2017
Mine: I North Thompson Creek Mines Inspection Date: 13 -Aug -17
Identification
of Pond
s During Inspection:
>ximate Water Level
vent (% total storage)
)w (gpm)
Erosional
Rills & Gulleys
Inadequate Vegetation
Outlet Channel Erosion
Burrows
Other
Lon
T-1
T-2
P-9
Refuse Pond
Treatment
Treatment
Treatment
Sediment
Sediment
Full
Full
Full
7503
7419
N/A
N/A
N/A
10%
0%
To T-1
To T-2
5 to 10 gpm
< 5 gpm
0
No No No No No
Other
No No No No No
Additional Comments
Drawing D-2-5 shows the location of the long pond & ponds T-1, T-2 and P-9.
Problem
Problem
Problem
Problem
Problem
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
MaintenanceRequired:
Nonee,� ,
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Differential Settling
No No No No No
No No No No No
Cracks or Slides
No No No No No
Seepage
No No No No No
Other
Appurtenant Structures
Defective Spillways
No No No No No
Dewatering Devices Clogged
No No No No No
Faulty Gates, Etc.
No No No No No
Other
No No No No No
Additional Comments
Drawing D-2-5 shows the location of the long pond & ponds T-1, T-2 and P-9.
Discharge from T-2 is being directed to Pond 9.
Pond 9 Emenercy spillway has be redirected to the ditch to the refuse pond.
Pond 9, Bottom Elev 7496. Invert of emergency spillway elev 7503'.
Refuse Pond, Bottom Elev 7418. Invert of emergency spillway elev 7'425',7'.-
425~7:Maintenance
MaintenanceRequired:
Nonee,� ,
sS c
,J�Q•c•
Name of Inspector: Stan Muhr
<, ``
J. E. Nf?>,9i�ti�m
Colorado P.1119230 Date