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<br />January 21, 1997 <br />Erica Crosby <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: 1st and 2nd half 1996 Subsidence Reports <br />Permit C-81-044 <br />Dear Ms. Crosby: <br />Attached, please find a copy of the above referenced reports which were <br />prepared by SubTerra, Inc. for Empire. In view of the fact that mining has not <br />occurred during 1996 only one copy of the mine projects with subsidence <br />monitoring locations is attached. Let me know if that is a problem or you <br />• would need an additional copy. As you will note the reports recommend that <br />monitoring of lines A, B, C, D and S be terminated, and that monitoring of line <br />J, and points H1 - H3 and N1 - N3 be suspended until mining resumes at <br />Empire. Empire is requesting that the Division review and approve these <br />changes to the subsidence monitoring program. I'll look forward to hearing <br />your response to this request. <br />In the interim if there are questions please give me a call. <br />Sincerely, <br />Richard Mills <br />Environmental Manager <br />attachments <br />file:I: \empire\subsid \ 1996report.doc <br />• <br />