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iiin niiiiii <br />To: Jim Pendleton <br />~ From: Janet H. Bi <br />Subject Foidel Cree in , C-82-056, <br />Subsidence Reports <br />Date: December 13, 1999 <br />Second Half 1998 <br />MEMORANDUM <br />You reviewed Twentymile Coal Company's 1998 Subsidence reports for the Foidel Creek Mine. <br />The following items were your comments for corrections or additional information from the <br />operator. <br />1. The Division found several computation "busts" in the "Cum" data field in Table 1.Please <br />review Table 1 entries for Stations 111, 112 and 113. Please correct and resubmit Table 1. <br />2. Twentymile Coal Company did not provide surface hydrology detail regazding the four "sag- <br />ponds" formed in Foidel Creek . Is this information discussed in detail in Foidel Creek's <br />Annual Hydrology Report? If this is not included in the AHR, please include a discussion of <br />the surface hydrology of the ponding in the Subsidence reports. <br />The Division asked the operator to provide responses to items no. 2 and 3. Twentymile Coal Company <br />faxed the attached pages today. I am forwarding.them to you so you can detemvne if this submittal <br />fulfills your concerns. <br />Thank you for your help. <br />Attachment <br />Cc: Dan Hernandez <br />C:/jhb(c82056(JPsub98resp.doc <br />^ <br />