_INSPECTION - C1994082 (43) - Laserfiche WebLink

Home Browse Search

October 18,2010 C-1994-082/Yoast Mine SLB The newly constructed slide area underdrain was discharging into the pond. Pond 12a held water below the discharge level. Pond 13 held water below the discharge level. Straw wattles had been placed at the top of the ridgeline above Pond 12. Pond 14 held water below the discharge level. The inlet to the pond has developed a significant gully;this should be monitored and repaired if necessary. Downcutting at the outfall of this pond needs to be stabilized as soon as access allows. Unless otherwise noted above,all embankments were stable and vegetated,inlets and outfalls were in good condition. The operator noted that weed spraying at the ponds and on reclaimed areas had not been completed due to weather complications. ROADS—Rule 4.03❑0 Construction 4.03.1(3)/4.03.2(3)l 1❑Drainage 4.03.1(4)/4.03.2(4)1111 Surfacing and Maintenance4.03.1(5)and(6)/4.03.2(5)and(6)❑❑Reclamation 4.03.1(7)/4.03.2(7): Roads were muddy and impassable the first day of the inspection. Sunny weather the second day dried the area out,but most of the light use roads remained in poor condition from the recent inclement weather. The mine entrance road and ditches were in good condition. YPM-20,on the upstream side of Culvert EX-2 had been regraded and turf reinforcement mat installed. The channel is fairly steep, so the reinforcement mat might not be adequate for anticipated flows. The operator should monitor this ditch with spring snowmelt and consider adding rock check dams or other reinforcement as necessary. REVEGETATION—Rule 4.15❑❑Vegetative Cover;Timing: Riparian planting in the Pond 12 area was complete. A fence was being constructed around the SP07-2 shrub concentration area. The operator noted,during a discussion after the close of the inspection on October 21, 2010,that repaired areas and areas requiring reseeding were being seeded that day. SLIDES and DAMAGE -Rule 4.12: Grading of the Pond 12 slide area was nearly complete;underdrain construction was underway. TOPSOIL—Rule 4.061 ! ]Remova14.06.2; Substitute Materials 4.06.4(4); Storage and Protection 4.06.3; Redistribution 4.06.4: In the area immediately upstream of the Pond 12 slide,topsoil was being replaced and disced. No topsoil was being replaced on the slide area itself,consistent with the approved slide remediation plan. Topsoil stockpile I had been disturbed,presumably for planting the SP07-2 shrub concentration area. SEALING OF DRILLED HOLES AND UNDERGROUND OPENINGS—Rule 4.07 RECLAMATION PLAN COMPLIANCE—Rule 4.13 DOCUMENTS RECEIVED Number of Partial Inspection this Fiscal Year: 2 Number of Complete Inspections this Fiscal Year: 2 Page 3 of 8