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highlighted on attachment A. <br /> C. As of March, 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, I 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 /> 1 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 /> �eWhtA. Gorham <br /> Environmental Protection Specialist <br /> CC: Dan Hernandez, DMG <br />