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the structure and indicated any repair work can be done during the summer of 1998. In <br />reference to the other two lines no damage requiring repair work was evidenced with the <br />power lines during the period of subsidence. <br />III. Map <br />The monitoring locations for the second half of 1997 are shown on the Second Half 1997, <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\972ndsub. doc <br />z <br />