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~~ ~= TerraMat_rix <br />~~ Engineering & Environmental Services <br />1475 Pine Grove Road • PO Box 774018 <br />Steamboat Springs, Colorado 80477 <br />303-879-6260 • fax 303-879-9048 <br />April 7, 1995 <br />Mr. Wally Erickson <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street -Room 215 <br />Denver, Colorado 80203 <br />iii iiiiiiiiiiiiiiii <br />sss <br />RECEt~~C~; <br />APR 11 l~ _ 7 <br />Division or Iwlnerals ,. <br />~_7 <br />Re: Kerr Coal Company (Permit No. C-80-006) -Request for Extension of Time [o Respond <br />[o Adequacy Comments on Technical Revision TR-13 <br />Dear Mr. Erickson: <br />We appreciate your comments relative to the request for technical revision (TR-13) addressing <br />modification of backfilling and grading plans for the Pit 1 area. We are proceeding with review <br />of [he noted drainage concerns and mapping questions in order to provide suitable responses <br />which will effectively address the remaining concerns. As you are aware, be[ween the time that <br />the ini[ial maps of the reclaimed topography were developed and [he present, Kerr proceeded <br />with some interim regrading and drainage work necessary to stabilize the Pit 1 area in its <br />current configuration until the AOC questions could be resolved. <br />In conjunction with this supplemental regrading work, ground surveys were completed which <br />provided additional information on the existing interim regraded configuration. Evalua[ion of <br />this additional information, comparison wi[h [he previous mapping, and resolution of several <br />minor discrepancies has taken longer than originally anticipated, therefore, we are requesting an <br />extension of the response due date to April 14, 1995. We recognize and accept that this <br />extension will also result in a minor extension of the DMG's review and approval timeframe <br />and waive the right to decision within the stipulated regulatory interval. <br />We apologize for the delay and appreciate your continued cooperation and attention in resolving <br />the outstanding issues. <br />Sincerely, <br /> <br />Jerry Nettleton <br />cc: J. Cooper/EFC Denver <br />G. Patterson/Kerr <br />R. Fanyo/Dufford & Brown <br />T. Leidich/TerraMatrix Denver <br />Steamboat Springs, CO • Denver, CO • Fon Collins, CO • Seattle, WA • Juneau, AK • Santiago, Chile SA <br />