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RULE 2 - PERMITS <br />Where W 1S the maximum X�clght Of CxpIOSINVS per 8- I11Il11Second delay in pounds <br />I) is the distance in feet from the nearest structure. dwelling. church. school. public or <br />institutional buildinc, <br />Ds is the scaled distance factor (55 for distances from 301 to 5,000 feet front the blast and <br />65 beyond 5,001 feet) <br />Based on this equation and a inininWin distance of Structures from the blast Site of 3.500 feet. the <br />maximum welght of explosives that can be detonated for any 8- ruilhsecond delay is 4.050 pounds. <br />Explosives and primers will be stored in two separate portable nlaoazines in accordance with <br />applicable Bureau of Alcohol Tobacco and Firearms regulations. The location of the explosi\ e <br />storage area is sho\\n on the Mine Facilities Map (South Ind). (Niap 2.05.3 -MIA). <br />Overburden front excavation of the face -up area and surface facilities construction will be hauled, <br />placed. and compacted to create the mine facilities bench and coal stockpile area. Given that PSCM <br />expects to encounter some resistant rock in the portal excavation. it is anticipated that some blasting <br />will be required. It is anticipated that approximately 0.8M bank cubic yards of material will be <br />excavated and placed in the facilities bench and coal stockpile area. The portal facilities area <br />excavation with cross sections is sho«n on Map 2.05.3 -M6, Portal Cross Section Map. Design <br />criteria for the mine facilities bench and coal stockpile area are provided in Exhibit 2.05.3 -E4. <br />Geotechnical Design and Stability Analyses. Additional slope stability studies will be done to <br />verify that the overall slope for the multiple benches is stable and will be provided to CDRMS «hen <br />completed. Based on experience and testing. and as documented in the Annual Reclamation <br />Reports for overburden materials frolll the saute geologiC units In the adjacent Seneca 11 klisle. the <br />overburden materials excavated front the portal area and used as fill should not be potentially acid - <br />or toxic - forming materials. Essentially all the soil material and overburden removed and stockpiled <br />during construction of the portal and related surface facilities will be used to reclaim these facilities <br />when they are no longer needed to support ongoing or future mining and related operations. Given <br />this consideration. there should be no excess spoil, and the related regulatory requirements are not <br />applicable. <br />Coal Refuse and Non -Coal ProcessinjZ Wastes <br />General and detailed plans for coal refuse piles are described and referenced in full compliance with <br />applicable provisions of Rules 4.10 and 4.11. Limited volumes of underground development waste <br />will be generated from fault crossings, overcast development, material from roof falls, and possible <br />fixture development of ventilation shafts. To the extent practical, this material will be disposed of <br />underground in mined -out areas. Coal refuse material (development waste and non - specification <br />coal) and incombustible waste rock generated at the PSCM will be transported to the surface via <br />conveyor, segregated, and transported to Foidel Creek Mine's approved refuse disposal area for <br />permanent placement. The coal refuse and waste rock material from PSCM has been considered in <br />the design of the Foidel Creek Mine CRDA and is addressed in technical revision TR09 -67 to <br />permit #C -82 -056 for that mine. <br />Based on both experience at the Foidel Creek Mine with waste rock materials from the same geologic <br />units and sampling and analysis of those geologic materials associated with the Wadge Coal Seam in <br />the PSCM permit area (refer to the overburden suitability discussion in Section 2.04.6), the Wadge <br />Midterm ReviieNN 2.05 -32 Revision 04/2013 <br />