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;~ <br />.; <br /> <br />- : 2 7 Zooz <br />Divisiur ,,...,inerals and Geology <br />June 24, 2002 <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />--r~-~. <br /> <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, CO 80467 <br />(970) 879-3800 <br />RE: Response to DMG comments on 2001 Annual Hydrology Report (AHR) <br />Dear Tom: <br />We aze in receipt of your letter dated Apri129, 2002 regazding the subject AHR. Note that under item 1, <br />the EC data did make it's way into our Oracle database for 7/2/01. A copy of the original field log is <br />attached, and an updated table is included. <br />TDS values discussed under your item 2 appeaz to be laboratory errors. This data was entered directly by <br />the laboratory into our Oracle database. Attached is the laboratory's letter of explanation. <br />If you have any questions, please contact me directly at (970) 870-2750. <br />Sincerely, <br />~~ <br />Brian A. Watterson. R.G. <br />Environmental Geologist <br />enclosures <br />