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1 1 . <br />Seneca Coal Company <br />MSHA I.D. OS-00304 <br />Highwall Mining Addendum <br />March 15, 2004 <br />• The operator of the highwall mining system will be stationed in a cab located 50-60 <br />ft from the miner entry. While the groundman adds or removes push-beam, he will <br />be positioned on the mainframe walkway with both the l6-foot cable reel and the <br />protective canopy between him and the front of the launch vehicle and highwall. <br />No person should, when practicable, be stationed in direct line with a hole during <br />operation. The typical entry layout is shown in the Attachments in Exhibit 1 <br />2. Coal discharge and maximum clearance: <br />The coal will be discharged from the stacker conveyor. A dozer or loader <br />maintains the pit floor coal stockpile. <br />3. Push-beam changing and handling: <br />Push-beams are loaded onto the table of the main frame using afront-end loader <br />with a fork attachment. Push-beams are added by a hydraulically powered <br />mechanical table referred to as a push-beam transfer mechanism (PTM). Once <br />positioned, groundman will climb onto the mainframe walkway to observe the <br />powerhead as it moves forwazd and latches to the newly positioned push beam. <br />Then the goundman will walk down this push-beam to the front of the main frame, <br />where the newly installed push-beam is shoved by the powerhead assembly and <br />latched to the stream ofpush-beams, which aze running underground. Once <br />• latched, the goundman will place locking pins in each side of the push-beam and <br />will then climb offthe main frame. The groundman must insure the boazding <br />ladders to the main frame are in good condition, and that walkways are free from <br />tripping or stumbling hazazds. Extra caution will be needed during periods of <br />inclement weather when push-beams aze wet or slick. After an entry has been <br />completed, the miner and push-beams will be pulled from the hole, and removed <br />one-by-one. The machine will then be repositioned over the next entry using its <br />crawlers. <br />4. Coal Delivery <br />The coal mined by the highwall mining system will be moved to either a storage <br />area or to a truck dump station for shipment on the Overland Conveyor. Coal <br />haulage will be from the stacker conveyor stockpile and from either direction from <br />the highwall mining system. Loading of coal shall be performed by Seneca's loader <br />and by haulage trucks. Coal haulage will occur a safe distance from the highwall. <br />5. SHM Idled <br />• If for any reason the SHM needs to be idled for an extended period of time, the <br />SHM will be removed from the opening and backed away from the highwall for at <br />(east 50 feet. <br />