2009-12-14_REVISION - C1996083 (3)

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• 2.05.3 Water Treatment Building A small (10'X10') water treatment building located northwest of Pond C used to add CDPS approved chemicals to the water as necessary for clarification. Bent Protectors Two concrete bent protectors located at the coal stockpile level. One is three sided with 20 feet high walls, 42 feet long and 16feet wide. The other is a four sided structure with 28 foot average height walls, 48.5 feet long and 15.5 feet wide. The four sided structure has a metal roof. Rock Bins Concrete bins located at the B-Bench. The concrete base is 20 feet by 30 feet. The 8 foot high walls are 40-feet long Retaininq Wall Concrete retaining wall located at the B-Bench. The 8-foot high retaining wall is approximately 50-feet long. Hubbard Creek Shaft See Map 39 for the location of the ventilation shaft that was constructed during 2007 and 2008. It is lined with steel and has a finished diameter of 10.5 feet. The steel liner was cemented in place. Prior to drilling, the perimeter of the shaft was grouted to minimize water infiltration. Grouting was extensive in the collar area and was reduced when the shaft alignment encountered solid rock. The shaft was blind bored the entire depth of approximately 500 feet. The cuttings removed from the shaft are considered underground • development waste and were therefore hauled to one of the approved gob disposal areas. Terror Creek Shaft See Map 42 for the location of the ventilation shaft that is to be constructed during 2010. The shaft is to be lined with shotcrete and have a finished diameter of 18.5 feet. A ventilation fan is not required for the shaft since pressure from the mine ventilation system will force air out the shaft. The shaft will be equipped with an escape hoist and nitrogen generator. The electrical powered compressors needed to run the nitrogen generator will be fed by an underground power cable. BRL will need frequent access to the site to test the escape hoist.The perimeter of the shaft will be grouted to minimize water infiltration. Grouting will be extensive in the water bearing zones. The shaft will be raise bored its entire depth of approximately 690 feet. The cuttings from the raise bore will be permanently stored underground. Emergency Escape System During 2009 the Operator installed an emergency escape system over the Hubbard Creek Shaft. The hoist is 20-feet long, 8-feet wide and 9-feet tall. The hoist foundation consists of six 5.5' X 5.5' 16" thick spread footings with 4-foot tall 18-inch diameter piers. The head frame has a 20-foot square base, is 3-feet by 12-feet at the top and is 27-feet tall. The head frame will be bolted to the existing shaft collar. A similar emergency escape hoist will be installed over the Terror Creek Shaft. TR-66 2.05 - 16 - 12/09