_INSPECTION - C1994082 ‎(13)‎

• Permit No: C1994082
• IBM Index Class Name: Inspection
• Doc Name: Inspection Report
• From: DRMS
• To: Roy Karo
• Inspection Date: 10/4/2011
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

October 4, 2011 C-1994-082/Yoast Mine SLB
but not yet constructed. The finished structure had two PVC pipes installed through the embankment to ensure
that the structure would dewater. None of the surge ponds or drainage channel had been armored yet.
There is a fairly wet section on the slope above and on the west side of Pond 012A;water was seeping down into
the pond. The seep on the north side of the Pond 013 slide was also flowing. Both underdrains in the Pond 012
slide area were flowing.
ROADS Rule 4.03 Construction 4.03.1(3)/4.03.2(3) Drainage 4.03.1(4)/4.03.2(4) Surfacing and
Maintenance4.03.1(5) and(6)/4.03.2(5)and(6) Reclamation 4.03.1(7)/4.03.2(7):
The reclaimed light use road from Haul Road B to the substation had been reopened. The operator is
planning to remove the substation for relocation to the Foidel Creek Mine site.
Roads and associated ditches and culverts were in good condition. The outlet side of Culvert YB3 was partially
blocked, and should be cleared to prevent backflow and piping.
RE VEGETATION—Rule 4.15 Vegetative Cover; Timing:
The operator had planted additional shrubs in the 2003-1 plot in the North Pit; chokecherry, serviceberry,
and aspen seedlings were observed. Sheep were grazing in the North Pit area,between the 2003-1 shrub plot and
Haul Road A.
SLIDES and DAMAGE-Rule 4.12:
The Pond 013 slide area did not show any signs of recent movement. The recently graded scarp was
stable, and the toe drains were clear. The operator still needs to armor the toe drains and clear material from
YPM-4,which is partially blocked by the northern toe of the slide.
The toe drains in the Neck Pit slide had not been regraded to ensure positive drainage. There were still three low
areas where water was pooling and could not flow to the Haul Road A ditch. These trenches need to be regraded
before winter sets in.
The Pond 012 slide area all appeared stable,with no sloughing of the north slope above Pond 012.
SIGNS AND MARKERS—Rule 4.02:
Permit boundary markers and mine identification signs were in place as required and were in good
condition.
TOPSOIL Rule 4.06 Removal 4.06.2; Substitute Materials 4.06.4(4); Storage and Protection 4.06.3;
Redistribution 4.06.4:
Topsoil depth had been augmented along the roadway to Topsoil Stockpile O, east of Pond 012. Topsoil
had been pushed off of the substation road into windrows to facilitate reopening of the road to access the
substation. Topsoil was also windrowed adjacent to the three new surge ponds in the North Pit along YPM-13. If
the windrowed topsoil is to remain over the winter, it should be seeded. If not, it should be seeded immediately
Number of Partial Inspection this Fiscal Year: 6
Number of Complete Inspections this Fiscal Year: 2
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