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ACCEPTED/FILED <br />AUG 2 6 2016 <br />CMSH-DISTRICT 9 <br />Truck Dumps: <br />Truck/Loader material will be placed in lifts no greater than 100 ft. (see Cross Section <br />3). <br />End dump trucks will generally back up to a sufficiently sized berm at the edge of the fill <br />to dump. In the event that tension cracks are formed, dumping operations will be halted <br />and the cracks inspected. The dump dozer will cut down the area affected by the <br />crack(s) and push the cut material over the edge of the dump (see Cross Section 3). <br />The end dump trucks may be instructed to dump "short", or a safe distance away from <br />the tension crack until the crack area is remediated. The dozer would then replace the <br />material that was cut down and previously dozed over the edge of the dump, with new <br />material from the trucks. <br />The terrain that the Truck & Loader material will be dumped on may have varying <br />slopes and provide different dump toe stability (coefficient of friction) conditions. If toe <br />conditions at the base of these dumps are questionable, with respect to stability, the <br />terrain at the base of the dump will be ripped with dozers to provide a rougher base for <br />the toe of the spoil material to contact. Per 30 CFR Part 77.1713, inspections of active <br />spoil dumps and faces will be conducted daily (or more often if necessary). <br />A buffer berm, or other no less effective means will be provided at the toe of live <br />stacked spoil piles (includes back stack, dumped in placed, and dragline spoils) where <br />roadways and/or work areas exist that is of adequate design and dimension to keep <br />material from rolling/sliding off the pile into the work areas and roadways. <br />Highwalls: <br />Overall highwall slopes at Trapper are typically, but not always, designed and <br />constructed at 700 or less. Highwall safety benches may be used when multiple seams <br />are mined in the same cut. These benches are designed with either a 25 or 30 foot <br />width. These design widths will normally ensure a minimum constructed highwall safety <br />bench width of 20 feet. <br />Highwall monitoring is conducted on a continuing basis by the dragline operators, <br />supervisors, and any other persons working near the highwall. Supervisors inspect the <br />highwall in active work areas for hazardous conditions at least once per shift and more <br />often as necessary or as otherwise required for hazardous conditions or imminent <br />dangers. Any hazardous condition noted during such examinations shall be reported <br />and corrected in accordance with the requirements of 30 CFR Part 77.1713. <br />To minimize the exposure to highwalls and the risk from rock fall injuries, equipment will <br />not be unnecessarily parked within 25' of highwalls or spoil bank toes. In the event that <br />S:\GROUND CONTROLUanuary 2016 GCP Revision\Trapper_GCP_Jan20l6_DRAFTI.docx Page 14 <br />