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r <br />r <br />Page 2, Kent Gorham, October 19, 1993 <br />TCC Response <br />Review of the data by the Senior Engineer in charge of the subsidence monitoring, Mr. <br />Stewart, indicates that no significant or unanticipated subsidence effects were noted between <br />the two dates referenced above lan assessment with which you, Mr. Gorham, appeared to <br />concur with based upon our discussion of 9/24). According to Mr. Stewart, the intent of the <br />weekly monitoring was to develop a feel for the rate of subsidence development, and his <br />review of the data prior to and following the week in question indicated no loss of subsidence <br />data. Mr. Stewart's review of the data indicates that only monuments 3003 through 3008 <br />experienced a change in subsidence rate during that time, and that the preceding and <br />following weeks' data meets the objectives of the monitoring program. TCC considers the <br />significance of this monitoring oversight to be negligible based upon the data obtained. <br />DMG Concerri <br />3) Line A-A' was not completely surveyed each week as required by your permit. <br />TCC Response <br />Mr. Stewart has stated that the review of data indicates that the monitoring which was <br />performed during the mining of the longwall panel in question adequately defines the surface <br />subsidence response. The permit was interpreted to mean that any point reasonably expected <br />to subside as a result of mining a particular longwall panel will be monitored rather than the <br />entire monitoring network. As a result, only that portion of line A-A' which was reasonably <br />expected to subside was monitored during the Panel 5 advance. <br />DMG Issue <br />41 Additionally, the semi-annual submittal was perceived by the Division to be tardy, having <br />been received by the Division in its final form almost 3 months after the end of the reporting <br />period. <br />TCC Response <br />TCC wishes to remind the Division that there is no submittal timeframe requirement <br />associated with the C-82-056 subsidence report, and as such is not subject to inclusion under <br />the NOV as outlined. <br />Should you have any questions or comments, please contact me at your convenience. <br />Sincerely, <br />Marcus A. Middleton <br />Environmental Specialist <br />