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15 <br /> No. 3 mine. <br /> • Discussion: assumed stable since installation; recorded <br /> movement is within surveying margin of error (+/-0. 05 <br /> ft) . See Figure 14 . <br /> Point No. : MC-10 <br /> Type : monitoring <br /> Installed : 9/17-20/84 Surveyed: 8/85 <br /> Location (mine coordinate system) : 11,889.17N, 2411 .41E <br /> Original Elevation (ft) : 11 ,688 . 56 <br /> Total Movement Since Installation (ft) : -0.32 <br /> Estimated Coal Removed Within Subsidence Zone (ft) : 10. 00 <br /> Subsidence Ratio: 0. 03 <br /> Location Relative to Mine Workings : approximate centerline, <br /> lw 102 No. 1 mine , 145 ft ahead of face on 8/9/85 . <br /> Discussion: in longwall 102 subsidence zone. Projected <br /> maximum subsidence using ratio of 0.30 : 3 . 00 ft. See <br /> Figure 15 . <br /> Point No. : MC-11 <br /> Type : monitoring <br /> Installed : 9/17-20/84 Surveyed: 8/85 <br /> Location (mine coordinate system) : 12050.17N, 2295 .75E <br /> Original Elevation (ft) : 11 ,662 . 63 <br /> Total Movement Since Installation (ft) : -0.47 <br /> Estimated Coal Removed Within Subsidence Zone (ft) : 10 . 00 <br /> • Subsidence Ratio : 0 .05 <br /> Location Relative to Mine Workings : approximate centerline, <br /> lw 102 No. 1 mine , 345 ft ahead of face on 8/9/85 . <br /> Discussion: in longwall 102 subsidence zone. Projected <br /> maximum subsidence using ratio of 0.30, 3 .00 ft. See <br /> Figure 16 . <br /> .Point No. : MC-12 <br /> Type : monitoring <br /> Installed: 9/17-20/84 Surveyed: 8/85 <br /> Location (mine coordinate system) : 12211.46N, 2180.13E <br /> Original Elevation (ft) : 11 ,639 . 84 <br /> Total Movement Since Installation (ft) : -0.10 <br /> Estimated Coal Removed Within Subsidence Zone (ft) : 10. 00 <br /> Subsidence Ratio: 0.01 <br /> Location Relative to Mine Workings : approximate centerline, <br /> lw 102 No. 1 mine, 540 ft ahead of face on 8/9/85 . <br /> Discussion: in longwall 102 subsidence zone. Projected <br /> maximum subsidence using ratio of 0.30, 3 .00 ft. See <br /> Figure 17 . <br /> Point No. : MC-13 <br /> Type : monitoring <br /> Installed: 9/17-20/85 Surveyed: 8/85 <br /> • Location (mine coordinate system) : 12371. 59N, 2065 .43E <br /> Original Elevation (ft) : 11,614 .31 <br /> Total Movement Since Installation (ft) : -0.17 <br /> Estimated Coal Removed Within Subsidence Zone (ft) : 10. 00 <br />