Laserfiche WebLink
Introduction <br />This report covers the 2000 period from Apri12000 to Apri12001. Mine Construction of the <br />Bowie No. 2 Mine began during May of 1997, with coal production beginning during August <br />1997. <br />The mining permit application for the Bowie No. 2 Mine requires the operator to submit the <br />results of the hydrologic monitoring and a visual inspection of known modem and historic <br />landslides within the pernut and adjacent azea for stability in June and November of each year and <br />report these results to the Division by the end of April each yeaz for the preceding year. <br />The operator is also required to inspect these landslides, both modem and historic mont}ily for six <br />months immediately after retreat mining occurs. This same inspection routine is applied to any <br />spring or pond in the immediate proximity of retreat mining. <br />Hydrologic Monitoring <br />The 2000 Annual Hydrology Report is attached to this Subsidence Report. All ponds and springs <br />were found to exhibit characteristics, both in a visual and chemical perspective in accord with the <br />baseline information supplied in the permit application. <br />• Visual Inspection of known historic and modern landslides. <br />A visual inspection of all known historic and modem landslides was conducted during July and <br />eazly November 2000 by David A. Jenkel, 2768 Compass Drive, Suite 101, Grand Junction, CO <br />81506. No new or rejuvenated landslides were found during this inspection. <br />Increased Inspection activity associated with retreat mining. <br />Pond 2 (P-2) and Spring 13 (5-13) fall within the area affected by retreat mining during the 2000 <br />monitoring season and therefore increased inspection activity occurred. However, Spring 13 has <br />not exhibited a flow since April 1997 and Pond 2 is perenially dry. Pond 2 was cleaned out during <br />the building of a drill road during 2000. Subsidence cracks developed across the roadway to DH- <br />13 after the mining in the D1 panel occurred. Accessible subsidence cracks were repaired and are <br />monitored as Spring 13 is monitored. <br />