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• Subsidence Monitoring -4- November 1994 <br />structures or renewable resource lands within the area of influence <br />of station U4. Therefore, monitoring of subsidence station U4 will <br />be suspended. <br />Station US <br />Change in elevation July 1986 - July 1994 -0.14 feet. The <br />influence area for monitoring station US lies above unmined panel <br />12 and some old C-Seam workings. The graph of station U5 shows a <br />relatively constant decrease in elevation. The area of influence <br />was last mined in 1982 The influence area of station US is not <br />over any active mining areas. When panel 20 is mined, the <br />elevation of this station will probably decrease a measurable <br />amount. However, there are no structures or renewable resource <br />lands within the area of influence of station U5. Therefore, <br />monitoring of subsidence station U5 will be suspended. <br />Station U8 <br />• Change in elevation July 1986 - July 1994 -0.40 feet. The <br />influence area for monitoring station UB lies over the old B-Seam <br />workings and some mined out C-Seam panels. The graph of station US <br />shows a relatively constant decrease in elevation. The C-Seam was <br />mined last in 1984. The influence area of station U8 is no longer <br />over any active mining areas. There are no structures or renewable <br />resource lands within the area of influence of station U8. <br />Therefore, monitoring of subsidence station U8 will be suspended. <br />Station U9 <br />Change in elevation July 1986 - July 1994 -0.21 feet. The <br />influence area for monitoring station U9 lies above panel 1 and <br />unmined panel 12 and some old C-Seam workings. The graph of <br />station U9 shows a relatively constant decrease in elevation. <br />Panel 1 was last mined in March 1990. The influence area of <br />station U9 is no longer over any active mining areas. When panel <br />20 is mined, the elevation of this station will probably decrease <br />a measurable amount. However, there are no structures or renewable <br />resource lands within the area of influence of station U9. <br />Therefore, monitoring of subsidence station U9 will be suspended. <br />• <br />