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0 2.05.6(6) <br />• <br />Subsidence Monitoring <br />Monument Location Frequency Purpose <br />17-A Hubbard Creek Quarterly <br />17-B Hubbard Creek Quarterly <br />17-C Hubbard Creek Quarterly <br />To confirm subsidence does not <br />17-D Hubbard Creek Quarterly occur in the limited extraction zone <br />17-E Hubbard Creek Quarterly <br />along Hubbard Creek. <br />17-F Hubbard Creek Quarterly <br />17-G Future Quarterly <br />17-H Future Quarterly <br /> <br />24-D Quarterly <br />24-E Monuments are Quarterly <br />24-F located above Quarterly <br />24-G the west D-Seam Quarterly To determine subsidence over <br /> <br />25-A <br />and west B- <br />Quarterly <br />ultiple seam mining. The <br />m <br />ill h <br />25-B Seam panels. Quarterly ave <br />subsidence monuments w <br />li <br />ll <br />i <br />i <br />b <br />-C <br />25 The D-Seam Quarterly ase <br />ne <br />m <br />n <br />ng <br />pre-longwa <br />t D Seam <br />t <br /> <br />25-D <br />panels were <br />Quarterly <br />, pos <br />measuremen <br />s <br />measurements and <br />inin <br />ll <br />l <br />25-E numbered WD-1, Quarterly g <br />ongwa <br />m <br />wall minin <br />ost B Seam lon <br /> <br />25-F <br />WD-2 & WD-3 <br />Quarterly g <br />g <br />p <br />measurements <br /> and were mined Quarterly . <br />26-B from 3/04 to Quarterly <br />Monitoring of these 20 monuments <br />26-C 3/05. The B- Quarterly will be quarterly through 2007 and <br />26-D Seam panels Quarterly <br />quarterly in 2009 at which time <br />26-E were numbered Quarterly monitoring of the 20 monuments will <br />26-F B-1, B-2 & B-3 Quarterly cease. <br />26-G and were mined Quarterly <br />27-A from 4/05 to Quarterly <br />27-B 10/06. Quarterly <br />27-C Quarterly <br /> <br />37-A Terror Creek Quarterly To confirm subsidence does not <br />37-B Terror Creek Quarterly occur in the limited extraction zone <br />37-C Transmission Quarterly along Terror. Creek or the <br />37-D Line Towers Quarterly Transmission Line <br />• ' Seasonal access difficulties usually restrict quarter monitoring to three times per year. <br />TR-65 2.05 - 125 - 12/09