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<br />highlighted on attachment A. <br />c. As of Mazch, 1993, longwall mining had progressed from west to east in <br />Panel 1 north of the river about two-thirds of the length of the panel. <br />Therefore, no longwall mining had yet occurred in the vicinity of the Third <br />North Intake fan. <br />d. By February 1994, the operator had mined at least some 1500-2000 feet <br />into the second panel, as evidenced by Basin Resources statement that "the <br />Zamora Canyon markers had been established at or near the time of <br />subsidence in Panel 2 (north of the river) ". <br />In conclusion, [can only make reasonable estimates, based on the above information. It appears <br />the mine conducted underground development mining in the vicinity of the Third North shaft in <br />the fourth quarter of 1988 and conducted longwall mining in Panel 1 (which would produce <br />subsidence) in the third or possibly fourth quarter of 1993. <br />I hope this information is what you are looking for. If you have questions or need additional <br />information, please call me. <br />Since ely, ~`~~ <br />ent A. Gorham <br />Environmental Protection Specialist <br />CC: Dan Hernandez, DMG <br />