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Spring 2008 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />is <br />Figure 25. Southward view from Photographic Observation Point 2 during spring 2008 of a <br />rockfall/landslide area in a massive sandstone cliff of the Ohio Creek Member of the Mesaverde <br />Formation (i.e., Location 10). The area is located about 1.800 feet above the tailgate road pillars <br />of mined Longwall Panel 22. The excavated area above the rockfall/landslide area (upper right) is <br />the drill pad for MDWs 22-05 and 22-06 (i.e., the terminus of Traverse H-H'). <br />• 5.6.3 Location 9 <br />This k it ne\a i-ockl'all/landslide site ahove the mined Lun,\vLdl Panel 19 headL?ate/Panel 20 <br />tail`-'ate k here 13-seam overhurden thickness is ahe?ut -2,2200 feet. The rockfall senu-ce is the upper <br />sandstt?ne ()f the 0111( Creek `'lenlher o the Mesaverde Fornutticm. The relatively small <br />rockl-.ill/landslide is as noted oii Mar 3. <br />This location was I'irst ()h.er\ed frcml Pholottyrahhic Ohservatiun Paint 8A as discussed under <br />Traverse A- 1'. Fwniiv 26 shcnvs this ne?v rockfall/land.slide bruin aneither herspecti\e.. <br />• 831-032.790 Wright Water Engineers, Inc. Page 36 <br />August 2008