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Subsidence Evaluation for the <br /> Exhibit 60E Southern Panels, Apache Rocks West, & Sunset Trail Mining Areas Page 38 <br /> 11.5 Roads <br /> As was observed in the Apache Rocks and Box Canyon mining areas,effects from mine subsidence <br /> are typically limited to cracks that do not prevent passage on most of the access roads and drill <br /> roads in the Southern Panels mining area. Also, as expected,no effects from landslide movements <br /> or rockfalls have occurred, because the mining rockfall potential is mapped in the moderate-high <br /> category or lower, and rockfalls were observed to occur only in the high to very high rockfall <br /> category areas in the Box Canyon mining area. <br /> No cracks have been observed in the soft, pliable alluvium, but a few cracks have occurred on the <br /> harder and more highly compacted Dry Fork access road, particularly in the area near the <br /> confluence of Deer Creek and Dry Fork, although all have been of a small extent. Observations <br /> along these roads are documented in the semi-annual Subsidence and Geologic Field Observations <br /> reports. <br /> 11.6 Buildings <br /> Baseline information on buildings, such as foundations, walls, chimneys, and roofs, has already <br /> been obtained on the Dry Fork Cow Camp in July 2004 (Dunrud 2004b) prior to any mining. A <br /> pre-mining survey of the Cow Camp structures was performed by West Elk Land Surveying in <br /> February 2006 and is included as Exhibit 73. The Minnesota Creek ditch rider's cabin is located <br /> near the headwaters of Dry Fork in the Dry Fork mining area. An exterior inspection of the cabin <br /> was performed in 2004 by the U.S. Forest Service and Agapito Associates, Inc. (Agapito, 2005). <br /> The structure was reported to be in average structural condition. <br /> 11.6.1 Lower Dry Fork Cow Camp <br /> The cabin exterior is approximately 13 feet wide, 20 feet long, and 8.5 feet high (the wall height). <br /> A lean-to 7 feet long and a porch 5.5 feet wide are located on the north and south ends of the cabin <br /> (see Figures 7 and 8, of Exhibit 60D for details). The outside walls are of a wood, board-and-bat <br /> construction. <br /> The foundation,which is of rock and mortar construction(and an estimated 1'/2 feet thick), ranges <br /> from about 1 foot high in the back to 20 inches high in the front. The roof is covered with tin. The <br /> side windows, which measure 2 by 3 feet in outside dimension, are located in the approximate <br /> center of either wall. <br /> Post-mining observations and measurements of the cabin following mining have been documented <br /> in the Subsidence and Geologic Field Observations Reports. <br /> 11.6.2 Minnesota Creek Ditch Rider's Cabin <br /> This cabin was built in the 1950's and is 24 feet 4 inches by 16 feet 4 inches single-story wood <br /> framed building. The cabin is located over the projected potential extended eastern end of E-seam <br /> longwall panel E6. <br /> 831-032.912 Wright Water Engineers, Inc. <br /> December 2020 <br />