2013-12-12_REVISION - C1982057 (3)

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�sENECA Coal Company Seneca Coal Company December 6, 2013 Ms. Janet Binns Division of Reclamation, Mining and Safety 1313 Sherman St., Room 215 SEC 2X013 Denver, CO 80203 pMSiON OF REAL° "RATION MINING SAFE RE: Seneca II -W Mine Permit No. C -82 -057 Minor Revision No. (MR -76), Supplemental Permanent Pond Demonstrations Adequacy Response No.2 Ms. Binns, Seneca Coal Company (SCC) has reviewed the adequacy letter dated December 3, 2013 and is submitting the following response. 1. No further action necessary. 2. SCC will need to update the language in the permanent impoundment demonstrations for T -2, T -3, T -S, T -18, T -20, T -26, and T -27 to simply indicate water quality data is included in Appendix 20 -2.2. These documents still indicate 2012 water quality data is included in the Appendix which is not the case given SCC response. Also, no water quality data has been submitted for Stock Tank T -24 and the permanent impoundment demonstration indicates water quality data exists for this impoundment. Please provide water quality for stock tank T -24 or an explanation why data does not exist for this impoundment. The permanent impoundment demonstration for T -24 will need to be updated to include an accurate discussion of the water quality status of this impoundment. Response: The permanent impoundment demonstrations for T -2, T -3, T -5, T -18, T -20, T- 24, T -26, and T -27 have been updated. The stock tanks do not always contain sufficient water for sampling during the scheduled sampling events; case in point is T -24 that seems to only contain sufficient water for sampling only during spring runoff. Seneca Coal Company • P.O. Box 670 • Hayden, Colorado 81639 Telephone (970) 276 -7016