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iii iiiiiiiiiiiii iii 999 c~~us Empire Corporation January 17, 1995 Janet Binns Environmental Protection Specialist Division of Minerals and Geology 1313 Sherman Street, Room 215 Denver, CO 80203 Dear Ms. Binns; P.O. sox 68 Craig, Colorado 81626 303-824-6246 ~crF i"r~'' ,}p,~ 18 1995 Division of Minerals 8 Geology Enclosed, please find the materials which pertain to the above-referenced request for technical revision to CEC's permit. As previously discussed, CEC wishes to extend the North Mains past 11th East gateroad (the northernmost point currently addressed in the approved plan) approximately 2,000 feet further to the north as shown on enclosed Map #24. This development is in keeping with our previously approved mining projections, and simply reflects the development work necessary for the logical progression of the mining sequence to the north within the "E" seam. Per our discussion, there should not be any subsidence related issues associated with this TR, given that the mains are designed to provide full support and prevent subsidence in these areas for the life of the mine. As such, CEC does not feel that there are any significant issues related to this TR, given that no subsidence is predicted, landowner and coal owner issues have been previously addressed within the permit, and hydrologic predictions have been previously addressed. The only item which has changed from the current mine plan is the timing aspects for the development and the extension of these mains to the north during the current permit period. CEC proposes to install three subsidence monitoring points over the main entries adjacent to the railroad track, one south of the river, and one north of the river. CEC proposes that these three points would be monitored semi-annually for one year following development intercept, after which time they would no longer be required and would automatically be dropped from the schedule. Map #24 has been revised to reflect these locations. Revised permit page Ex 44-5 and revised Map ;a24 have been enclosed. I have also included a list of materials, a completed revision request form, and a copy of the proposed public notice for your reference.