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Spring 2014 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas (E -Seam) <br />6.0 BIBLIOGRAPHY <br />DeGraff, J. V. and C. H. Romesburg. 1981. Subsidence Crack Closure; Rate, Magnitude, and <br />Sequence. International Associagion of Engineering Geology Bulletin 23. <br />Dunrud, C. R. 1976. Some Engineering] Geologic Factors Controlling Coal Mine Subsidence in <br />Utah and Colorado. Professiona]( Paper 969. Denver, CO: U.S. Geological Survey. <br />1989. Geologic Map and Coal $tratigraphic Framework of the Paonia Area, Delta and <br />Gunnison Counties, Colorado. Coal Investigations Map C -115. Denver, CO: U.S. <br />Geological Survey. <br />1999. Subsidence Field Observations — September 15 -17, 1999. Memorandum to Christine <br />Johnston, Mountain Coal Company, LLC. Denver, CO: Wright Water Engineers, Inc. <br />2000. Subsidence Field Observations — August 28 -30, 2000. Memorandum to Henry <br />Barbe, Mountain Coal Company,ILLC. Denver, CO: Wright Water Engineers, Inc. <br />2001. Subsidence Field Observations, West Elk Mine, August 28 and 29, 2001. Denver, <br />CO: Wright Water Engineers, Ina. <br />2002. Subsidence Field Observations, West Elk Mine, August 27 -29, 2002. Glenwood <br />Springs, CO: Wright Water Engineers, Inc. <br />2003. Subsidence Field Observations, West Elk Mine, July 22 -24, 2003. Glenwood <br />Springs, CO: Wright Water Engineers, Inc. <br />2004a. Subsidence and Geologic Field Observations: Apache Rocks and Box Canyon <br />Mining Areas, July 12-15, 2004. Glenwood Springs, CO: Wright Water Engineers, Inc. <br />2004b. Exhibit 60C. Subsidepce Evaluation and 2004 Geologic Hazard Field <br />Observations for the West Flatiron Lease Area. Glenwood Springs, CO: Wright Water <br />Engineers, Inc. <br />2004c. Exhibit 60D: 2004 Geologic Hazard Field Observations for the South of Divide <br />Mining Area. Glenwood Springs CO: Wright Water Engineers, Inc. <br />2005. 2005 Subsidence and Geologic Field Observations Box Canyon, West Flatiron, <br />Apache Rocks, and South of Divide Mining Areas. Glenwood Springs, CO: Wright Water <br />Engineers, Inc. <br />2006. 2006 Subsidence and Geologic Field Observations Box Canyon, West Flatiron, <br />Apache Rocks, and South of Divdde Mining Areas. Glenwood Springs, CO: Wright Water <br />Engineers, Inc. <br />Dunrud, C. Richard, et al. 1996. Exhibi� 60A: Subsidence Evaluation of the Revised Mine Panel <br />Layouts in Section 21 and Sections 26 and 27. Denver, CO: Wright Water Engineers, Inc. <br />831 - 032.796 Wright Water Engineers, Inc. Page 38 <br />September 2014 <br />