2007-06-29_PERMIT FILE - C1981022A (2)

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Sakai - 2.05.3 mining operations, written notification will be provided only to residenu or owners of dwellings or structures within one-half mile of the blast area. Unavoidable hazardous conditions that could delay a scheduled blast or require an unscheduled blast include emergency situations where rain, lightning, or other atmospheric conditions or operator or pubhc safetyconcerns warrant unscheduled blasting as a safetyconsideration. Blasting operations are conducted in accordance with the following equation which limits the maximum weight of explosives to be detonated within any 8-millisecond delay period: Where W is the maximum weight of explosives per 8-millisecond delay in pounds D is the distance in feet from the nearest structure, dwelling, church, school, or public or institutional building D, is the scaled distance factor (55 for distances from 301 to 5,000 feet from the blast and 65 beyond 5,001 feet) Based on this equation and a minimum distance of structures from the blast site of 3,500 feet, the maximum weight of explosives that can be detonated for any 8-millisecond delay u 4,050 pounds. Explosives and primers are stored in two separate portable magazines in accordance with applicable Bureau of Alcohol Tobacco and Firearrrts regulations. The location of the explosive storage area is shown on the General Facilities Map, (Map 2.05-M1). i Coal Handling Structures The location, construction, use, maintenance, and removal of coal handling and transportation structures are described in the following sections and shown on the General Facilities Map, (Map 2.05-M1), and the Facilities Detail Maps, (Map series 2.05-M3x). Sanbom Creek Mine Overland Conveyor -The 4,500-foot long Sanbom Creek Mme overland conveyor previously extended from the Sanbom Creek More portak to the dump station in the Elk Creek coal handling facilities area. The conveyor is constructed with steel supports on concrete foundations and includes deer underpasses as shown by the Facilities Details, (Map series 2.05-M3x). The overland conveyor was modified by increasing belt width and belt speed. These modifications increased the conveyor capacity from approximately 800 tons per hour to approximately 2,300 tons per hour. The conveyor was also extended by adding a new conveyor settion (Conveyor lA) from the Conveyor 2 drive to the new Elk Creek coal stockpile stacking tube. Anew conveyor segment with transfer station was established in conjunction with the mine expansion initiated in 1995 to connect the existing Sanbom Creek Mme overland conveyor with the new Elk Creek coal stockpile facilities. The new conveyor segment is an elevated conveyor Homing from Transfer Station No. 2 to the Stacking Tube No. 1 headhouse. The associated transfer station allows diversion of coal, coal refuse, or mine development waste to the existing East Yard stacking conveyor and stockpile. The conveyor design includes partial covets for dust control, walltways, and emergency stop controls for inspettion and maintenance and in compliance with applicable MSHA safety regulations. The conveyor "as-built" configuration is shown on drawings included in Exhibit 2.05-E 1, Facilities Design. • Elk Creek Mine Overland Conveyor - An overland conveyor will be constructed to transport coal from the Ells Creek Mme portals to the top of Stacking Tube No. 1 in the Ells Creek facilities area. The Elk Creek conveyor will include an underground section from the D Seam intercept to the mine portals; a surface section, constructed on grade; and an elevated section, tying into the existing PR04 2.05-41 Revised August 2000