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<br /> <br /> <br />III IIIIIIIIIIIIIIII <br />sss <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Ndlurdl Recnurrec <br />1 311 tiherman 51 . Koum 21 <br />Phony. 13031 8663567 <br />FAX: 1303) 832-8106 <br />February 2, 1996 <br />~~ <br />Ulbr~ <br />DEPARTMENT OF <br />NATURAL <br />RESOiJRCES <br />Kay James Roy Romer <br />Reclamation Manage: covem°. <br />Walden Coal Company <br /> <br />P. O. Box 229 Tames S. LOChhead <br />Eaeculive D°eaor <br />M;en,ei a. Long <br />Boulder, CO 80306 Division DueUOr <br />Re: 1995 Annual Hydrology Report, Bourg Mine, C-81-021 <br />Dear Ms. James: <br />The Division received Walden Coal Company's Annual Hydrology Report (AHR) for 1995 <br />on January 16, 1996. The Division has reviewed the report and has the following comments: <br />1. The currently approved plan requires that Walden Coal Company "examine the <br />reclaimed area for springs and seeps:' No comments or text detailing the result of <br />this examination were included with the 1995 AHR. Please include, in each year's <br />AHR, details about when this examination occurred, what areas were examined, and <br />the results of this examination for springs and seeps. <br />2. j The currently approved sampling plan requires that SAR be calculated and reported. <br />No SAR values were reported for the three lab samples analyzed during 1995. <br />3. Well 30-C has a reported iron value of 8.08 mg/1, total recoverable. It is likely chat <br />the well casing is the cause of this relatively high value. Furthermore, although the <br />plan is not specific, the Division is more interested in the amount of dissolved iron <br />with regard to ground water. <br />4. September 1995 water levels in well 30-C have risen some 2.5 feet since the fall of <br />1994. Some fluctuation due to variations in precipitation is expected. However, <br />water levels in well 33-B show a more curious variation. Well 33B has been <br />observed as dry in all previous reports since at least 1991. Spring 1995 water levels <br />indicate a column of water at least 10 feet above the bottom of the well, possibly due <br />to heavy spring precipitation. <br />With the exception of the iron value, reported values are very near the previously defined <br />range of values and no discernable impact due to mining can be identified at the present <br />time. <br />