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1/7/2015 State.co.us Executive Branch Mail - Fwd: Adequacy Letter for Pond 4's retention <br />message <br />Zuber - DNR, Rob <rob.zuber @state.co.us> Wed, Jan 7, 2015 at 9:37 AM <br />To: Alysha Hernandez - DNR <alysha.hernandez @ state.co.us> <br />Please file under General Documents /Public Correspondence. <br />1 Zuber, h <br />Coal Regulatory <br />Depw'tmen( of NaWral Resources <br />es} <br />303.366.3567, extension 3113 1 F 303.33203106 <br />1313 Sherman Street, Room 215, Denver, CO 30203 <br />rob.zuber @state.co.us I http: / /mining. state. co. us <br />---- - - - - -- Forwarded message ---- - - - - -- <br />From: Zuber - DNR, Rob <rob.zuber @state.co.us> <br />Date: Tue, Dec 2, 2014 at 1:37 PM <br />Subject: Re: Adequacy Letter for Pond 4's retention <br />To: Linda Saunders <saunders615 @live.com> <br />Linda — <br />For TR -42 that is the only adequacy letter so far. Depending on how they respond, it may be the only <br />one that we ever write for that TR. That remains to be seen. <br />I do not have the time to send you every adequacy letter. Please look for them in the Laserfiche <br />system. You can type *adequacy* in the Doc Name field and also limit your time frame with the Doc <br />Date fields. <br />Coal seams are monitored at many regulated coal mines in Colorado. This is required by Regulation <br />41 (The Basic Standards for Groundwater) of the WQCD. Although water in coal seams is often in <br />poor condition prior to any mining activity, there is still the potential for the water to deteriorate due to <br />mining. For example, the water in a coal seam aquifer may be of sufficient quality for livestock but not <br />for domestic use; after mining, however, it may be less useful for livestock. This deterioration has not <br />occurred at Southfield, however, per a review of the data. <br />Groundwater below the coal seams was not monitored due to the lack of connectivity between the coal <br />seams and viable aquifers. For a more extensive explanation, please see the memorandum from Mike <br />Boulay, DRMS (June 3, 2013). <br />Regards, <br />Rob <br />https: / /mail.googl e.com /m ai I /u/0 / ?ui =2 &i k= e29129fcb5 &view =pt &search= i nbox &th= 14ac54264873lf91 &si m l= 14ac542648731 f91 1/2 <br />