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S ENEc: <br />Coal Company <br />June 15, 2012 <br />Ms. Susan Burgmaier <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80202 <br />RE: Seneca II -W Mine (Permit C -82 -057) <br />TR -77, Permanent Pond Demonstrations for Retention <br />Ms. Burgmaier, <br />Seneca Coal Company (SCC) is submitting Technical Revision No. 77 (TR -77) to request approval for <br />permanent retention of six (6) sediment and eight (8) stockponds within the Seneca II -W reclamation area. <br />Retention of these structures will enhance the approved post mine land use for livestock grazing and <br />wildlife habitat enhancement. Letters requesting retention of these structures have been sent to the <br />landowners. The letters from landowners received to date are included in this submittal; the remainder <br />will be forwarded as received. Permanent impoundment demonstrations for the following sediment ponds <br />are attached: <br />o Pond 005 <br />o Pond 006 <br />o Pond 009 <br />o Pond 015 <br />o Pond 016 <br />o Pond 017 <br />Also attached are permanent pond demonstrations for the following stock ponds: <br />o Stockpond T -2 <br />o Stockpond T -3 <br />o Stockpond T -5 <br />o Stockpond T -18 <br />o Stockpond T -20 <br />o Stockpond T -24 <br />o Stockpond T -26 <br />o Stockpond T -27 <br />Seneca Coal Company • P.O. Box 670 • Hayden, Colorado 81639 <br />Telephone (970) 276 -5217 • FAX (970) 276 -5222 <br />Seneca Coal Company <br />tifecellED <br />R,sclam <br />tong old Safety <br />