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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 8663567 <br />FAX: (303) 832106 <br />November 22, 2005 <br />Mr. Steven E. Leach <br />The Pittsburg & Midway Coal Mining Co. <br />4601 DTC Blvd. <br />Denver, CO 80237 <br />Re: 2004 Annual Hydrology Monitoring Report-Adequacy Response <br />Dear Mr. Leach: <br />COLORADO <br />DIVISION O F <br />MINERALS <br />GEOLOGY <br />RE CLANATION•NINING <br />EAFETY•ECIENCE <br />em owenx <br />Governor <br />Russell George <br />Executive DIrECIOr <br />Ronald W. Cottony <br />Division Director <br />Natual Resource Trustee <br />The Division of Minerals and Geology (Division) has received a response (WWC letter of November 14, <br />2005) to the Division letter of July l 1, 2005, regarding the adequacy of the subject report. We have <br />completed a review of the response, and complement you and WWC for the information provided and <br />amendments to the report. Upon approval of proposed revisions to the Permit Application Package (PAP), <br />all adequacy items will be addressed to the satisfaction of the Division. We anticipate the amendments to <br />the PAP for the following items of the Division letter and WWC response <br />Item 4. The different version of pages 4.6-54 and 4.6-144 explains the lack (since 1996) of April <br />monitoring for TR-1.5, TR-3, and TR-4. A search of the files and records at the Division has not <br />recovered a version such as WWC provided on September 15, 2005. Insertion of the correct page would <br />not alter the monitoring program in (since at least 1996) effect. Therefore, submission of a minor revision <br />as proposed is appropriate. Please update Table 4.6-54 (page 4.6-144) to reflect other approved changes <br />(TCS-1 monitoring, piezometer wells, etc.) as well. <br />Item 7. A minor revision to the PAP to correct the typographic error designation (TRS-1) of TCS-1 on <br />page 4.6-147 (line 34) (should read TCS-1) is appropriate. <br />Items 9 and 10. Please take care, during any revision, to keep the historical (clarified as may be <br />appropriate) predicted probable hydrologic impacts to Trout Creek in the PAP. These were predicted <br />impacts at that time. The prediction needs to be updated (additions) to recognize information now <br />available, as WWC proposes, if warranted. <br />Please call me if you have any questions. <br />Yours truly, <br />~.~.,- ..--f Gr/ <br />Byron Walker, EPS <br />cc: Beth Hessen, WWC Engineering, 61 I Skyline Road, Laramie, WY 82070 <br />files: C-1980-001, 2004 AHR <br />C:\bgw\My Documen[slEdna\AHRs\AHR 2004 adequacy response letter.doc <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />