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Homestake Mining Company June 17,2019 <br /> Regular(112d)Operation Reclamation Permit Application Package <br /> derived from technical specifications (where available) or from productivities <br /> demonstrated on Nevada mine reclamation projects. <br /> • The compositions and productivities of crews included in the SRCE calculations are <br /> derived from the RSMeans Heavy Construction Data (RSMeans, 2006). These are used <br /> to calculate task-specific unit rates utilizing labor, equipment, and material rates defined <br /> for the project. <br /> • For specific activities that were not able to be estimated within the standard framework of <br /> the SRCE model, the 2018 RSMeans Heavy Construction Costs (RSMeans, 2018) was <br /> also used to estimate labor, material, and equipment costs. <br /> 3.3. SRCE Framework <br /> Many of the activities associated with reclamation of each OU were structured to fit within the <br /> framework of the standard SRCE category worksheets, and generally required multiple SRCE <br /> categories. The following standard SRCE category worksheets were used to account for planned <br /> reclamation activities, as shown in Table 3-1, which include costs for the associated labor, <br /> equipment, and materials. <br /> Table 3-1. SRCE categories by reclamation activity. <br /> SRCE Category OU Reclamation Activities <br /> Waste Rock Dumps OU 3 IRD—Sericite Stockpile <br /> IRD—Low Point Mitigation <br /> TCRD—Disposal & Repository Cell <br /> Heap Leach North Pit—French Drain System <br /> Roads Haul and Access Roads—Forest Service Access Road <br /> Quarries& Borrow Pits North Pit—Landslide Crest Mitigation <br /> South Pit—Landslide Slope Mitigation (cut) <br /> South Pit—Landslide Crest Mitigation <br /> Sandstone Quarry—Regrading <br /> Limestone Quarry—Regrading <br /> Haul Material North Pit—Partial Pit Backfill <br /> North Pit—Southeast Pit Wall Buttress <br /> South Pit—Landslide Slope Mitigation (haul &fill) <br /> North Pit—Cover Material Stockpiling <br /> South Pit—Cover Material Stockpiling <br /> Sediment& Drainage Control North Pit—East Diversion Ditch <br /> South Pit—East Diversion Ditch <br /> Water Management—Sediment Pond Liner Upgrades <br /> Process Ponds Water Management—Sediment Pond Removal/Backfill <br /> Well Abandonment Water Management—Wells Abandonment <br /> User Sheet#2 Engineered Treatment Cell (ETC) Expansion <br /> EXHIBIT L-RULE 6 4 12 (RECLAMATION COSTS)(Revised June 17,2019) Page 4 <br /> HOMESTAKE MINING COMPANY <br />