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- 10 - <br /> MCR intends to resume subsidence monitoring as required by <br /> . its agreement with the U.S . Department of Energy (DOE) in <br /> regard to the multilift longwall demonstration project to <br /> be performed in cooperation with DOE. This resumption will <br /> occur as required by this agreement prior to or in conjunc- <br /> tion with the beginning of longwall mining of the A bed <br /> under the mined-out B bed longwall panel 102 . Appropriate <br /> revisions to the subsidence monitoring program will be <br /> filed with CMLRD concerning the multilift project in a <br /> timely manner. <br /> SUMMARY, SUBSIDENCE MONITORING PROGRAM <br /> 1981-1985 <br /> MCR' s subsidence monitoring program began in 1981 with the <br /> installation of control points TP-1 through TP-5 and moni- <br /> toring points MC-1 through MC-9 . Control point TP-6 and <br /> monitoring points MC-10 through MC-16 were installed during <br /> the fall of 1984 . The locations of these points are given <br /> in the discussion of each point below and on the map accom- <br /> panying this report. A number of other points were installed <br /> over longwall panel 301 , L.S . Wood No. 3 mine, in conjunction <br /> with the U.S . Department of Energy in 1982 . When the multi- <br /> lift demonstration project was moved to longwall panel 102, <br /> Dutch Creek No. 1 mine , these points were removed, and as a <br /> result they are not included in this discussion. <br /> All 22 points have been surveyed at least once since installa- <br /> tion. The results of these surveys are included in the discus- <br /> sion of each point below, shown on the graphs prepared for <br /> each point (Figures 1 through 19) , and summarized in Table 1 <br /> and Table 2 . <br /> Point No. : TP-1 <br /> Type : control <br /> Installed: 1981 Surveyed: 9/84 , 8/85 <br /> Location (mine coordinate system) ; 11202 .33N, 3839 .72E <br /> Original Elevation (ft) : 11,844 . 52 <br /> Total Movement Since Installation (ft) : -1 . 94 <br /> Estimated Coal Removed Within Subsidence Zone (ft) : 9 . 00 <br /> Subsidence Ratio: 0 .22 <br /> Location Relative to Mine Workings : near center lw 101, No. 1 <br /> mine; 420 ft WSW of 5 North, No. 2 mine. <br /> Discussion: not surveyed until 1984 . Probably stable or nearly <br /> so from longwall 101 mining, approximately 5/78 , with 1984- <br /> 85 movement due to longwall 102 , begun late 1982 . See <br /> Figure 1. <br /> Point No. : TP-2 <br /> . Type : control <br /> Installed: 1981 Surveyed: 9/84 , 8/85 <br />