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aE1VT;BY:Administration Office .10-18-83 :11:47AM :CYPRUS YAMPA VALLEY » 303 B32 9106~ti 3 <br />Pepe 2, Kent Gorham, October 19, 1993 <br />TCC Rasoonse <br />Review of the date by the Senior Engineer in charge of the subsidence monitoring, Mr. <br />Stewart, indicates that no significant or unanticipated subsidanca affects were noted between <br />the two dates referenced above (an essessmont with which you, Mr. Gorham, eDDeared 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 rata of subsidanca development, and his <br />review of the data prior to and following the weak in question indicated no loss of subsidence <br />date. Mr. Stawart's review of the date indicates that only monuments 3003 through 3008 <br />experienced a change in subsidanca rate during that time, and that the D-eceding and <br />following weeks' data manta the objectives of the monitoring program. TCC considers the <br />significance of this monitoring oversight to bs negligible based upon the date obtained. <br />pMG Concern' <br />31 Lina A-A' was not completely surveyed each week ea required by your permit. <br />Mr. Stewart has stated that the review of data indicates that the monitoring which wee <br />performed during the mining of the longwall panel in question adequately define9 the eurfece <br />eubsidenoe response. Ths 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 then the <br />entire monitoring network. As a result, only that portion of line A-A' which wee reasonably <br />expected to subside was monitored during the Panel 5 advance. <br />DMG issue <br />4) Additionally, the semi-annual submittal was perceived by the Division to be tardy, having <br />bean received by the Division in its final form almost 3 months after the and of the reporting <br />period.. <br />~C Resoonsa <br />TCC wishes to remind the Division that there is no submittal timeframa requirement <br />associated with the C-82-066 aubsidene• report, end es such is not eubjeet to inclusion under <br />the NOV as outlined. <br />Should you have any questions or comments, please contact me at your convanlance. <br />Sincerely, <br />Marcus A. Middleton <br />Environmantel Specialist <br />