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• <br />• <br />/ ' <br />~J <br />approximately 150 south of the highwall and S[9-6 was placed approximately 350 feet <br />south of the highwall. The monuments consist of 7' to 8' sections of 2-1/2" <br />diameter drill steel driven 5-1/2' to 6-1/2' into the pit backfill material. <br />The monuments are to be surveyed quarterly the first year and annually <br />thereafter. The coordinates of the initial monument survey are provided in Appendix <br />E. <br />X. TROUT CREEK SANDSTONE <br />Monitoring of We11 TCS-1 was initiated in 1995 to ensure the absence of mining <br />impacts on the Trout Creek Sandstone aquifer. Results of the monitoring efforts are <br />provided in Appendix F. To date, no impacts from mining activity are evident in <br />Well TCS-1. <br />51 <br />