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3 <br />--~ ~- TerraMatrix <br />Engineering 8~ Environmentalk Setrvices <br />165 S. Union Boulevard • Suile 400 <br />Lakewood, Colorado 80228 <br />303-763-5140 • fax 303-763-8003 <br />February 6, 1995 <br />Wally Erickson <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br /> <br />°~~EIVED <br />~ EB 0 8 1995 <br />G.ti,~,,;.. ,;, ,.~~~~erais 8 Geology <br />Re: Kerr Coal Mine (Permit No. C-80-006) Minor Revision Request (MR-19) For Revised <br />Temporary Stabilization Plan <br />Dear Wally: <br />With this transmittal, Kerr Coal Company (Kerr) respectfully request approval of a minor <br />revision (MR-19) to the existing approved Mining and Reclamation Permit (Permit No. C-80- <br />006) for the Marr Mine, near Walden, Colorado. The minor revision involves modification to <br />the Temporary Stabilization Plan for the Pit 1 Area (MR-18) submitted to, and approved by, <br />DMG on September 14, 1994. <br />Given the temporary nature of the stabilization plan, Kerr has revised the plan and eliminated <br />the need for the lined channel at the south end of the Pit 1 area. To control erosion in the <br />south end, Kerr will construct contour furrows on all slopes greater than 4H:1V and reestablish <br />the temporary diversion ditch E-1. The contour furrows will be closed features established at <br />flat or minimal grades. Temporary ditch E-1 will be reestablished at the crest of the slope at <br />the south end of the Pit 1 area. The ditch will divert run-off around the slopes at the south end <br />of the Pit 1 area to Pond E. These measures should adequately control erosion in the Pit 1 area <br />until such time as the final backfilling and regrading is completed. <br />Enclosed is the following: <br />Application Form <br />Revised Temporary Stabilization Plan <br />Please feel free to contact me with any question or if I can provide further clarification or <br />submittal information that will facilitate your review. <br />Sincerely, <br />TerraMatrix Inc. <br />~._.~ ~ ~ <br />Thomas E Leidich <br />Project Engineer <br />cc: George Patterson <br />Steamboat Springs, CO • Denver, CO • Seattle, WA .Juneau, AK .Santiago, Chile SA <br />