2012-01-30_PERMIT FILE - C1996083A (2)

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• 2.05.6(6) C Subsidence Monitoring Monument Location Frequency Purpose 17 -A Hubbard Creek Quarterly To confirm subsidence does not occur in the limited extraction zone along Hubbard Creek. B -8 Panel, the last panel adjacent to Hubbard Creek, was complete by the end of 2009. Monitoring will cease at the end of 2011 which is two years after the B -8 panel was complete. To determine subsidence over multiple seam mining. The subsidence monuments will have pre - longwall mining base line measurements, post D Seam longwall mining measurements and post B Seam longwall mining measurements. Monitoring of these 20 monuments will be quarterly through 2007 and quarterly in 2009 at which time monitoring of the 20 monuments will cease. 17 -B Hubbard Creek Quarterly 17 -C Hubbard Creek Quarterly 17 -D Hubbard Creek Quarterly 17 -E Hubbard Creek Quarterly 17 -F Hubbard Creek Quarterly " 24-0 24 -E Monuments are 24 -F located above 24 -G the west D -Seam 25 -A and west B- 25 -B Seam panels. 25 -C The D -Seam 25 -D panels were 25 -E numbered WD -1, 25 -F WD -2 & WD -3 26 -A and were mined 26 -B from 3/04 to 26 -C 3/05. The B- 26 -D Seam panels 26 -E were numbered 26 -F B -1, B -2 & B -3 26 -G and were mined 27 -A from 4/05 to 27 -B 10/06. 27 -C Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly 37 -A Terror Creek Quarterly To confirm subsidence does not occur in the limited extraction zone along Terror Creek or the Transmission Line 37 -B Terror Creek Quarterly 37 -C Transmission Line Towers Quarterly 37 -D Quarterly 0 ' Seasonal access difficulties usually restrict quarter monitoring to three times per year. PR -12 2.05-163- 11/10 A PPRovEJ� �t��6 /1b