_INSPECTION - C1994082 ‎(6)‎

• Permit No: C1994082
• IBM Index Class Name: Inspection
• Doc Name: Inspection Report
• From: DRMS
• To: Roy Karo
• Inspection Date: 8/28/2012
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

August 28, 2012 C-1994-082/Yoast Mine SLB
Pond 014 was holding water approximately 18"below the discharge level. Pond 013 also held water
about 6"below the riser top. Pond 012 was discharging clear water. Pond 011 held water 10' below the riser top.
Pond 012A held water about 18"below the riser top. Pond 011A held water 10"below the riser top. Pond 010
was holding water 3' below the riser top. All embankments and spillways were in good condition,with the
exception of Pond 012A. The trash rack on Pond 012A needed to be cleared, and the emergency spillway rip rap
needed to be reworked, as documented in the July 18, 2012 inspection report.
The operator indicated that Ponds 012 and 012A had been surveyed to determine water and sediment storage
capacity and whether the ponds required cleaning,but the data had not yet been analyzed. In the event that the
ponds require cleaning,the work needs to be completed before the end of this construction season to ensure
adequate capacity for spring runoff.
Stock tank ST-1 held water but was not discharging. The surge structure above YPM-8 was dry.
ROADS—Rule 4.0311 Construction 4.03.l(3)/4.03.2(3)11 Drainage 4.03.l(4)/4.03.2(4)11 Surfacing and
Maintenance4.03.1(5) and(6)/4.03.2(5) and (6)11 Reclamation 4.03.1(7)/4.03.2(7):
Road A was in good condition, ditches and culverts were functional. Maintenance items identified during
the August 8, 2012 inspection had not been addressed. A large gully had formed in LU-3A,where YPM6-2
crosses the road. The road and drainage need to be repaired. LU 3B was in good condition; water bars were
functional. The operator indicated that road maintenance would be done this construction season.
During the August 8, 2012 bond release inspection,the width of LU3A was measured in several locations between
YPM-8 and stock tank ST-1. No width measurements were recorded west of ST-1. During this inspection,two
additional width measurements were recorded.
I I' at the point near shrub plot 2006 31,where the road splits off to a two-track trail down to Pond 013.
10'8"at the well cluster where LU3A terminates.
REVEGETATION—Rule 4.15❑ Vegetative Cover; Timing:
Revegetated areas were in good condition. Cover was good in the areas walked on the east end of the
north pit and south end of the south pit. No active erosional features were observed in these areas. Sagebrush was
heavy in places, and pockets of Wood's rose were observed. Weed concentrations in the reclaimed areas were
reduced from last year; observations of large weed infestations were primarily made in drainages and along more
recent erosional features or recently disturbed areas.
Shrub seedlings planted in the 2003 plot in the North pit were surviving and had leafed out at the bases. Weeds
were heavy in this plot,particularly houndstongue,thistle, and kochia.
SLIDES and DAMAGE -Rule 4.12:
The Neck Pit, Pond 012 and Pond 013 slide areas all appeared to be stable with no evidence of recent
movement. Rills have formed on the steep Pond 012 cut slope,but the slope itself appears to be stable. The
operator has proposed the use of rock mulch(Minor Revision 39)to stabilize this slope and promote revegetation.
It was not clear whether this work would be completed yet this fall.
Number of Partial Inspection this Fiscal Year: 3
Number of Complete Inspections this Fiscal Year: 1
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