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• 1995 Subsidence Report <br />Page 2 <br />1 Right <br />Mined Length: Approximately 700 feet of advance. <br />Overburden Thickness: <br />Approximately 1,750 feet. <br />Mining Height: 9-11 feet on advance. <br />2 Right <br />Mined length: Approximately 1,200 feet of advance. <br />Overburden Thickness: <br />Approximately 1,750 feet. <br />Mining Height: 9-11 feet on advance. <br />4 Right <br />Mined Length: Approximately 500 feet of advance. <br />• Overburden Thickness: <br />Approximately 1,500 feet. <br />Mining Height: 9-11 feet on advance. <br />Subsidence Ia~acts 1995 <br />Subsidence survey monitoring of selected wide-spaced monuments in the vicinity <br />of active mine Hvrkings was conducted during June 1995. Surveying of these <br />selected stations was conducted in accordance with the projected monitoring <br />addressed in the 1994 Annual Subsidence Report. Selected subsidence monitoring <br />stations established over the Pitkin Mesa Pipeline were monitored in June and <br />October 1995. <br />Wide-Spaced Monitoring Grid Station SumTery <br />Fourteen wide-spaced ~ronitoring grid stations reie surveyed for the 1995 <br />reporting year. The station locations are shown on Map No. 2-5. The following <br />discussions present a station by station assessment of survey results generated <br />for 1995. Monitoring station data sheets are appended to this report for <br />reference (Tab 7). <br />Station 6: Surveys Here initiated in August 1982 and continued <br />• biannually through July 1984. Surveys were re-initiated in <br />1987 and conducted annually through 1991 and bi-annually 1992 <br />- 1994. Station 6 is located on approximately 350 feet of <br />