2015-01-27_PERMIT FILE - C1996083A (2)

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2.05.6(6) (f)(v)(B) Monitoring See tables beginning on page 2.05 -173. The hydrologic monitoring program will continue. At least quarterly monitoring will be performed. Surface streams, ponds, springs and groundwater will continue to be monitored. The results of the monitoring will be observed for abrupt changes in water levels, flows or quality which might indicate mining impact. The Operator set up a subsidence network over the first five B -Seam longwall panels to gain as much information as possible to compare actual data with the subsidence predictions presented in Volume IIIA, Exhibits15, 17 and 21. Additionally, the actual subsidence data will be utilized to check the design and effectiveness of limited extraction zones. At the request of the DRMS and UDSA -FS the Operator installed eight subsidence monuments in the limited extraction zone along Hubbard Creek (monuments 17 -A through 17 -H). These monuments were utilized to verify that subsidence does not occur along the limited extraction zone. Six of the monuments were installed during 2001 prior to the November 2002 longwall start-up in panel D -7. Two of the monuments 17 -G & 17 -H were installed in 2009 prior to the initiation of mining in Panel B -9. At the request of the DRMS the Operator has identified twenty (20) subsidence monuments to measure settlement over superimposed multi -seam extraction as follows: - - - ---------------------------- �Line 'A,B IC D E F '- -------- '-- '-- '-- '-- '-- ' - -' - -' 24 X ;X;X;X; X ; X -- �26 X X X X X X27 �X �X �X '--------- '-- ' -- '-- '-- '-- ' - -' - -' PRA 4 2.05-168- 03/14