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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Rewurces <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 8663567 <br />FAX: (303) 832~~nSt 7, 2007 <br />Jerry M. Nettleton <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, Colorado 80467 <br />Re: Foidel Creek Mine (C-82-056) <br />2006 Annual Hydrology Report <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />- ~-- <br />SAF ETY <br />Bill Riner, lr. <br />Governor <br />Harris D. Sherman <br />Executive Director <br />Ronald W. Cottony <br />Division Director <br />Natural Resource Trustee <br />The Division has completed a preliminazy review of the above-referenced report. The <br />report is well organized and is very well-prepared. We have the following comments. <br />1. Please include the 6 Mains North dischazge point on page 2 of the report. <br />2. Please include the Fish Creek Tipple Sediment Pond E and discharge point (Fish <br />Creek) on page 2 of the report. <br />3. Page 3, line 31, word 1. Should this be northeast? See Map 13. See lines 5, 6 and <br />20 on page 5. <br />4. Please add Permit CO-72272 to the list on Page 12. <br />5. Please reconcile the difference in the location of well FBR-2 as it is shown on Map <br />13A (Figure 2 of the 2006 AHR) and on Map 23 B of the permit application. If the <br />location is wrong on Figure 2, please correct it. If the location is wrong on Map <br />23B, please revise this map in a forthcoming technical revision. <br />6. Please provide a copy (for insertion into the report) of Table 60 (missing) as <br />referenced on page 12 of the report. <br />7. Please provide information on Pond F in the report (page 12 and tables). <br />8. Please add section lines and section designations to Figure 117 of the report. The <br />purpose of such information is to better correlate mining activity with groundwater <br />monitoring reports. <br />9. Please check page 5 of the report to verify the accuracy of the reference to well <br />970 i 3TM, and submit a revised page if it is necessary to correct this reference. <br />(0. Please provide or direct us to the following data which could not be found in the <br />report: July water quality sample data for surface monitoring sites 301.69, and <br />1005. <br />Office of Office of <br />Mined Land Reclamation Denver Grand Junction • Durango Active and InaRive Mines <br />