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<br /> <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor | Robert W. Randall, Executive Director | Virginia Brannon, Director <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br /> <br /> <br />June 7, 2016 <br /> <br /> <br />Geneva Brion <br />Colorado Water Quality Control Division <br />4300 Cherry Creek Drive South <br />Denver, CO 80246 <br /> <br /> <br />Re: Foidel Creek Mine (Permit No. C-1982-056) <br /> Revision: MR-298 <br /> Fish Creek Borehole Flocculant System. <br /> <br /> <br />Dear Ms. Brion: <br /> <br />The Division of Reclamation, Mining and Safety has received an application for the above <br />referenced permitting action for the Foidel Creek Mine. The application was deemed complete on <br />June 7, 2016. <br /> <br />Twentymile Coal, LLC. has submitted a minor revision to the permit to reflect the addition of a <br />flocculant delivery system and use of a flocculant at the Fish Creek Borehole and Water Treatment <br />Installation to drop-out coal fines and enhance water quality prior to discharge. The proposed <br />change is limited to an additional option for water treatment, specifically to address reduction of <br />suspended coal fines prior to discharge and does not replace or supersede existing approved <br />treatment methods. This revision does not involve the construction or installation of any additional <br />structures or equipment (with the exception of a metering pump). According to Twentymile Coal, <br />LLC. the flocculant selected (Amerifloc 490) is approved for use in drinking water systems and <br />should have very limited potential for adverse impacts to aquatic life at low dosing rates. The <br />applicant is not proposing additional surface disturbance outside of the area currently approved for <br />disturbance. <br /> <br />Permit Revision (PR), Permit Renewal (RN), or Technical Revision (TR) application materials are <br />available for review at the Routt County Clerk and Recorder, P.O. Box 773598, Steamboat Springs, <br />CO 80477 and at the Division’s Denver office. Minor Revision (MR) and Surety Release (SL) <br />application materials are available for review at the Division’s Denver office.