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<br />• Introduction <br />This report covers the period from July 2002 through December 2002. Mine Construction of the <br />Bowie No. 2 Mine began during May of 1997, with coal production beginning during August <br />1997. Some additional information concerning the first half of 2003 is also included. <br />The mining permit application for the Bowie No. 2 Mine requires the operator to submit the <br />results of the subsidence monitoring programs and the results of the visual inspections of known <br />modern and historic landslides within the permit and adjacent area for stability in June and <br />December of each year and report these results to the Division within 30 days of the ends of the <br />reporting periods. <br />The operator is also required to inspect these landslides, both modern and historic monthly for <br />six months immediately after retreat mining occurs. This same inspection routine is applied to <br />any spring or pond in the immediate proximity of retreat mining. <br />Visual Inspection of known historic and modern landslides. <br />A visual inspection of all known historic and modern landslides was conducted during November <br />2002 by David A. Jenkel, 2768 Compass Drive, Suite 101, Grand Junction, CO 81506. No new <br />or rejuvenated landslides were found during this inspection. These sites are regularly inspected <br />by Bowie personnel during gob vent borehole construction and reclamation efforts. <br />Increased Inspection activity associated with retreat mining. <br />Accessible subsidence cracks were repaired during coal exploration events and are monitored by <br />both coal exploration supervisors and hydrologic monitoring technicians. The accessible visual <br />results of the subsidence effects associated with the Bowie No. 2 Mine are overlain on Map 27 - <br />Subsidence which is attached to this report. During this period, 13 hydrologic monitoring points <br />were potentially impacted or re-impacted by mining activities. Potentially impacted or re- <br />impacted means the mine workings or angle of draw of the mine workings passed under the <br />monitoring point during the year. No impacts to any of these hydrologic monitoring points were <br />observed during this period. <br />Results of Subsidence Survey Monitoring <br />The results of the November 2002 monitoring are attached. As in the past, the survey was <br />performed by Cragg Surveying using GPS methods. <br />• Revised 03/04 <br />