Laserfiche WebLink
PERMIT#: M-1977-493 <br /> INSPECTOR'S INITIALS: ECS <br /> INSPECTION DATE:August 16,2016 <br /> OBSERVATIONS <br /> This was a routine monitoring inspection for the Climax molybdenum mine, a 112d-3 hard rock mine operated by the <br /> Climax Molybdenum Company—a division of Freeport McMoRan. The inspection was conducted by DRMS <br /> representatives Eric Scott and Wally Erickson. DRMS arrived on-site at approximately 0945. -DRMS was <br /> guided/accompanied on the inspection by Climax representatives Ray Lazuk, and Aaron Hilshorst. <br /> The DRMS inspection started with a general discussion of the site and some items of interest identified by Climax and <br /> DRMS. Specifically, issues related to the upcoming TR for the final design of the McNulty Gultch OSF expansion. The <br /> expansion was approved on a conceptual level as TR22,however, the evolution of the mine plan since the restart, wetland <br /> permitting requirements for the expansion, and other design revision issues will require a final engineered pre- <br /> construction design submittal for DRMS approval prior to start of work on the OSF expansion. <br /> The group then observed the open pit from the north survey shack area and the current McNulty Gulch OSF area. DRMS <br /> noted that the"North 40" low-grade ore storage area has again expanded since the previous inspection. Topsoil is being <br /> salvaged from a part of the area between the McNulty and North 40 OSF areas prior to waste rock placement. Waste rock <br /> from active mining continues to be deposited on the previously existing footprint of the McNulty Gulch OSF and North <br /> 40 area. <br /> The group inspected the vehicle maintenance shop area, and the hazardous waste segregation and storage buildings while <br /> in the camp area. Both of these facilities were observed to be very well maintained and operated. <br /> The inspection proceeded to the bio-solids processing area,Robinson Lake, and Eagle Park Reservoir to discuss ongoing <br /> groundwater monitoring in these areas and the potential to reclaim the Lake Irwin area as a wetlands bank to offset <br /> impacts from the McNulty Gulch expansion. The group also observed the locations of the groundwater cutoff walls and <br /> compliance wells in the Eagle River drainage area. <br /> DRMS observed the Sludge Densification Plant(SDP) and the Tenmile and Mayflower TSF dams and tailings deposition <br /> areas. Tailings deposition has moved almost entirely to the Mayflower TSF,with the Tenmile TSF still available if <br /> needed. Topsoil is being stripped from the Searle Gulch floor near the Mayflower pump barges. The barges will <br /> gradually be moved up into the gulch as the tailings and water levels rise in the Mayflower TSF. DRMS then visited the <br /> Tenmile Creek drainage compliance well locations,toured the Property Discharge Water Treatment Plant(PDWTP) and <br /> observed the bypass tunnel outlet area. DRMS also inspected the toe-area of the McNulty Gulch OSF and the existing <br /> clean water/impacted water surface water segregation currently in place for runoff management. <br /> No issues of concern were noted during this inspection. <br /> Inspection Contact Address <br /> Ray Lazuk <br /> Climax Molybdenum Company <br /> Highway 91,Fremont Pass <br /> Climax,CO 80429 <br /> Page 2 of 2 <br />