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P~'r`~il/rp <br />kerr coal company acr (~(~ <br />box 487 ~ Walden, Colorado 80480 ~ (303) 723-4721 ~ ~ 1J,7,~`, <br />Divig,,;, ~, , ,,,,,,: <br />October 5, 1995 " ' r, ~;r.,,~-~, <br />Mr. Daniel I. Hernandez <br />Senior Environmental Protection Specialist <br />Colorado Division of Minerals & Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />iii iuiiiiiiiiu iii <br />999 <br />RE: KERR COAL COMPANY - MARR MINE (PERMIT NO. C-80-006) <br />MR-27 - SMALL AREA EXEMPTION REQUEST <br />Dear Mr. Hernande2: <br />Accompanying this letter is Kerr Coal Company's (Kerr) <br />application and supporting materials requesting approval of a Minor <br />Revision (MR-27). The minor revision involves a small area exemption <br />request, installation of a silt fence and ditch to protect potential soil <br />loss offsite from the base of a temporary topsoil storage windrow. <br />Included with this transmittal are three copies of the following: <br />MR-27 Application Form <br />Summary of Revisions and Additions <br />Revised Map 16A - Mine Area Surface Water Hydrology (Revision <br />8) <br />At the Kerr (Marry Mine in the previous Pit #1 Area, Kerr is <br />executing the reconfiguration of the Pit #1 Area as per the Reclamation <br />Agreement ("the Agreement") with Kerr Coal Company, Office of Surface <br />Mining and Colorado Division of Minerals and Geology. The <br />reconfiguration per the Agreement is delineated on the topographic map, <br />Pit 1 Supplemental Backfill and Grading Plan, Map 37B. Map 37B is <br />mentioned here, only for your convenience. Revisions for MR-27 are on <br />Map 16A, Mine Area Surface Water Hydrology, Revision 8. <br />Rule 4.05.2(3) applies to this Minor Revision request and <br />references within the Kerr Permit, C-80-006 are in Sections <br />816.42(a)(3)(A), (B) Size of Area; and 816.43(c) Ditches. <br />To create adequate maneuver/work room to construct the agrees <br />configuration of slopes, Kerr faced the necessity of moving a portion of <br />the existing topsoil windrow that was temporarily stored on the top, <br />northwest ridge of the west highwall. By so doing, the west slope of the <br />windrow will be exposed to the west beyond the perimeter of the current <br />designed drainage control area. Although the clay soil has proven to be <br />stable, the potential exists that the soil could drain/erode offsite, <br />away from the drainage control system. Dimensions of the affected area <br />are: (west face only) 750 feet long, 31.1 feet wide (average), (anc <br />approximately 6 feet high); having an area of 0.54 acres. <br />C:\WPDOCS\NR-27APP <br />