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1 <br /> <br />999 STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Ruom 215 <br />Denver, Colorado 80203 D I v 15 l O N O F <br />Phone: 1303) 866-1567 MINERAL S <br />FAX: (301) 832-8106 ~ <br /> GEOLOGY <br /> RECLAMATION <br /> MINING•SAF ETY <br />Apri16, 2000 RJR oven, <br /> Governor <br /> Greg E. Walther <br />Mr. Rick Mills Executive Director <br /> <br />Twentmile Coal Company Michael B. Long <br />Division Director <br />29515 Routt Counry Road No. 27 <br />Oak Creek, CO 80467 <br />Re: Foidel Creek Mine, C-82-056, Technical Revision No. 35, Adequacy Letter No. 2 <br />Dear Mr. Mills: <br />The Division has reviewed Twentmile Coal Company's adequacy response, received on Apri13, 2000. The <br />submitted pages were in response to the Division's adequacy letter, dated Mazch 20, 2000. The following <br />comments are a result of the Division's review of the responses. The numbering system follows the <br />numbering of the Division's questions from the March 20, 2000 letter. <br />1. Twentmile Coal Company has changed the reference on revised page 2.05-50 (rev. 3/28/00) to Map 16. <br />However, the text references the title, "(5 yeaz Mine Plan with subsidence monitoring plan)", as the Map <br />16 title. The coLrect title of Map 16 is "Mine Water Balance Map". Please correct the Map 16 title on <br />page 2.05-50. <br />2. Page 2.05-50 (rev. 3!28/00) was appropriately corrected to refer to the EMD Dewatering Borehole. No <br />additional response is required for this item. <br />3. Twentmile Coal Company has responded to item No. 3 appropriately. <br />4. The chart on page 2.05-77 (rev.3/28/00) has been revised appropriately. <br />5. The Division is in agreement with Twenrymile Coal Company's discussion that the Division will not <br />require Map 26 to be revised to show the minor road alignment changes on the Fish Creek Borehole <br />access road, since the scale of the map does not allow for this level of detail. The included page 87 (rev. <br />3/28/00) further clarifies the limited nature of the road work. <br />Exhibit 8r was reviewed, and the Division fmds the culvert sizing calculations acceptable. <br />Twenrymile Coal Company states in their cover letter, dated March 31, 2000, that page 2.05-71 has been <br />corrected to eliminate reference to the Fish Creek Borehole road as a light use road. The Division, <br />however, has not received a revised page 2.05-71 in correspondence pertaining to Technical Revision <br />