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• • iii iiiiiiiiniu iii <br />TR9PPER MINING INC. 999 <br />October 29, 1990 <br />Mr. David Berry <br />Colorado Mine Land Reclamation Division <br />215 Centennial Bldg. <br />1313 Sherman Street <br />Denver CO 80203 <br />Subject: Mitigation Plan for Overburden slide Southend cut 88 A pit. <br />Dear Mr. Berry: <br />This correspondence concerns the overburden slide in cut 88 of Apit. The slide has <br />stabilized for now however with the open cut to the north of the slide tt is unsafe to put any <br />equipment on the area to commence repair activity. Conditions of the slide have not <br />changed since your October 15, 1990, inspection of Trapper Mine. The slide crevice <br />remains approximately 25 feet north of our 1989 topsoil strtpltne in A Pit. No topsoil has <br />been lost to date and we do not anticipate any loss of topsoil from this slide. <br />To insure safe working conditions for people and equipment, the toe of the slide must be <br />reinforced preventing further movement to the north. The dragline will progress from north <br />to south on cut 87 overburden, casting spoils into the open cut of 88 providing material to <br />reinforce the toe of the slide. The dragline will be in position to do this by the week of <br />November l9, 1990. When this has been accomplished dozers can be used to seal the slide <br />area for safety and prevent surface water from entering the crevices. Some sealing might be <br />done with the dragline if positioning is possible to reach the slide area. <br />When the slide has been sealed and made safe then additional topsoil along the existing <br />stripline can be removed with scrapers or pushed with dozers to prevent possible <br />contamination. The area of topsoil to be removed if necessary, will be determined once the <br />slide has been sealed. <br />David, we will keep you informed of any change in the slides advance :ind of our repair <br />activities. Thank you for your time with this matter if there are any further questions please <br />contact Foster Beckett or Bill Agnew. <br />Sincerely, <br />,~ <br />/ ~• <br />Foster Beckett <br />Mine Engineer <br />SfB/rbb/057 <br />pc E C Johnson <br />J M Mattern <br />W Agnew <br />R L Fanyo <br />File <br />P 0. Box 187 Craig. Colorado 81626 (303) 824-x401 <br />