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Spring 2009 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />Figure 8. Eastward view of the east side of Box Canyon during Fall 2007 showing the active <br />rockfall /landslide area above the mined, eastern part of Longwell Panel 21 near MDSs 21 -32, 21- <br />36, and 21 -38 (Location 4 of this report). <br />F- I <br />L <br />Figure 9. Spring 2009 view of the same active mckfall /landslide area. Note the reduced number <br />of pine trees above the exposed cliff face indicating continued slabbing and headward erosion. <br />Also note the additional boulders in the landslide area beneath the head scarp indicating <br />continued slabbing. <br />During the spring 2009 field visit, this location was also used to photograph the reclaimed MDW <br />pad at Location 6 of this report. Figure 10 shows the reclaimed pad in the central portion of the <br />• photograph at the horizon line. Below the reclaimed pad is an area where the surface vegetation <br />831- 032.791 Wright Water Engineers, Inc. <br />November 2009 <br />