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• 2.05.3 <br />underground development waste and were therefore hauled to one of the <br />approved gob disposal areas. <br />Terror Creek Shaft <br />See Map 42 for the location of the ventilation shaft that is to be constructed <br />during 2010. The shaft will be raise bored its entire depth of approximately <br />690 feet. The cuttings from the raise bore will be permanently stored <br />underground. The shaft is to be lined with shotcrete and have a finished <br />diameter of 18.5 feet. A ventilation fan is not required for the shaft since <br />pressure from the mine ventilation system will force air out the shaft. The <br />shaft will be equipped with an escape hoist and nitrogen generator. The <br />electrical powered compressors needed to run the nitrogen generatorwill be <br />fed by an underground power cable. BRL will need frequent access to the <br />site to test the escape hoist.The perimeter of the shaft will be grouted to <br />minimize water infiltration. Grouting will be extensive in the water bearing <br />zones. <br />• Ememencv Escape System <br />During 2009 the Operator installed an emergency escape system over the <br />Hubbard Creek Shaft. The hoist is 20 -feet long, 8 -feet wide and 9 -feet <br />tall. The hoist foundation consists of six 5.5' X 5.5 thick spread <br />footings with 4 -foot tall 18 -inch diameter piers. The head frame has a 20- <br />foot square base, is 3 -feet by 12 -feet at the top and is 27 -feet tall. The <br />head frame will be bolted to the existing shaft collar. A similar emergency <br />escape hoist will be installed over the Terror Creek Shaft. <br />7J <br />PR -12 2.05-21- 02/10 <br />