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the power poles from May 27, 1998 through July 26, 1998. No significant damage to the <br />structures was noted during this period, again due to the fact that the structures were not <br />directly undermined. No repair work was required as a result of TCC's mining activity. <br />III. Map <br />The monitoring locations for the first half of 1998 are shown on the First Half 1998, <br />Subsidence Map. The map also indicates the location of the longwall face on a monthly <br />basis. <br />IV. Conclusions <br />Subsidence monument and power pole surveys disclosed no unusual developments <br />during the reporting period. Subsidence magnitudes and projected draw angles were <br />within the anticipated ranges previously documented for the area. <br />Structures remained essentially unaffected during the period with the exception of the <br />predicted impacts to the railroad track and power poles. During the period of subsidence, <br />the railroad track was maintained in good condition. No adverse impacts, i.e. imminent <br />failure of structure, were evident with regard to the power lines. <br />File:I:\environmental\document\subsidence\981 STsub.doc <br />2 <br />