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Memo to Janet Binns <br />Twenty Mile Coal Company 1997 Subsidence Reports <br />page 2 <br />not pre-mining nor post subsidence in November of 1997. No discussion is <br />provided regarding this surface hydrology detail within the text of the subsidence <br />report. This could be a significant topic of interest. Is a discussion provided <br />anywhere else, such as in the Annual Hydrology Report? Was the pond formed <br />solely by subsidence troughing? Was it subsequent breached by natural <br />phenomena or artificially eliminated? This topic should be thoroughly described <br />somewhere within the various monitoring reports provided by Twenty Mile Coal <br />Company. <br />Finally, within the Second-Half report, Mr. Mills states that "Limited damage <br />occurred to the Hayden -Gore Pass structure (power line pole or poles?), however, <br />utility representatives inspected the structure and indicated any repair work can be <br />done during the summer of 1998." Twenty Mile Coal Company should provide a <br />more detailed description of the damage and the affected repairs in subsequent <br />1998 reports. <br />cc: Dan Hernandez <br />Doc: M:\COAL\JAP\TMCSUB97.WPD <br />J P/jp <br />