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III IIIIIIIIIIIIIIII <br />STATE OF CO~vi~vU <br />DIVISION OF MINERALS AND GEOLOGY <br />Drpanmrnl ul N,Il oral Re.uurccs <br />I I I 1 Sherman SL, Room l I5 <br />Dcnvrr, Gdnrado N01114 <br />Phnnc. 111111 NbL~556i <br />November 20. 1996 <br />Mr. Basil Bear <br />Bear Coal Company <br />P.O. Box 518 <br />Somerset, CO 81434 <br />RE: 1996 Annual Hydrology Report; Bear Mine; Permit No. C-81-033 <br />Dear Mr. Bear: <br />~I~ <br />DEPARTtvtEfJT OF <br />NATURAL <br />RESOURCES <br />Rov Romer <br />Governor <br />lame, S. Lochhead <br />E.ecwivr Dvenor <br />Michael B Long <br />Drvnhmn Dbeaor <br />The Division has reviewed the 1996 Annual Hydrology Report (AHR) for the Bear Mine. The <br />frequency of data collection is in compliance with the approved monitoring plan contained in your <br />permit, with the following exception. Temperature data were not provided for the upper and lower <br />french drain sample locations for all sample dates, and pH and conductivity were not reported for <br />FD-LS on 7/17/96. <br />No significant anomalies in water quality data were observed based on a review of the 1996 report <br />and previous AHRs. As with the 1995 data, the 1996 continue to show higher conductivity and <br />salinity levels in the down gradient groundwatermonitoring well (AAl) as opposed to AA3. It also <br />appears that water quality data presented for the 1996 AHR generally show a slight increase in <br />conductivity and salinity levels for the downstream north fork sample station versus the upstream <br />sample location. <br />The Division has the following specific comments concerning the 1996 AHR: <br />The findings on page 3 of the AHR states specific percent increases and reductions <br />in constituentconcentrations for wells AA I and AA3. Please state the basis for this <br />analysis. Is this analysis based on 1996 data compared to 1995, or is this analysis <br />based on a comparison with baseline data. Please clarify this and provide a revised <br />report page. For future AHRs it would be helpful to present the baseline data along <br />with the water quality parameter tables presented on page 2. <br />2. Please describe the alternate sediment controls discussed at the bottom of page 4 of <br />the AHR. Provide a brief explanation of these controls in a revised report page. <br />The Division notes that Bear Coal Company (Bear) made a good effort to continue <br />monitoring the upper and lower french drains even after they were damaged in a slide <br />