Laserfiche WebLink
• Subsidence Monitoring -5- November 1994 <br />Station U10 <br />Change in elevation July 1986 - July 1994 -0.64 feet. Change in <br />horizontal position July 1986 - July 1994 1.39' north, 0.20' east. <br />The influence area for monitoring station U10 lies above panel 2. <br />The graph of station U10 shows a noticeable dip after the pillars <br />were extracted from the panel. The area of influence was mined <br />last in June 1990. The influence area of station U10 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 U10. <br />Station U10 was also established to monitor possible movement of <br />the identified landslide body. The station moved steadily to the <br />north during the period of record. The movement to the north may <br />be indicated on the graph as a constant decline in the elevation of <br />the station. The movement to the east has been erratic. An <br />overall movement of 1.4 feet in eight years indicates there has not <br />been an activation of the identified landslide feature. <br />• Station U11 <br />Change in elevation July 1986 - July 1994 -1.44 feet. Change in <br />horizontal position July 1986 - July 1994 0.68' north, 0.49' west. <br />The influence area for monitoring station U11 lies above the main <br />entries and panels 2 & 3. The graph of station U11 shows a slight <br />dip shortly after the pillars were extracted from the panels. The <br />area of influence was mined last in November 1991. The influence <br />area of station U11 is no longer over any active mining areas. If <br />and when the main entries are pillared, the elevation of this <br />station will probably decrease a measurable amount. However, there <br />are no structures or renewable resource lands within the area of <br />influence of station U11. <br />Station U11 was also established to monitor possible movement of <br />the identified landslide body. The station moved relatively <br />steadily to the north during the period of record. The movement to <br />the north may be indicated on the graph as a constant decline in <br />the elevation of the station. The movement to the west has been <br />erratic. An overall movement of 0.8 feet in eight years indicates <br />there has not been an activation of the identified landslide <br />• feature. <br />