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MID-CONTINENT RESOURCES, INC. <br /> PRODUCERS OF THE FAMOUS COAL BASIN COKING COAL <br /> BOX 158 <br /> CHICAGO OFFICE CARBONDALE, COLORADO 81623 <br /> TELEPHONE <br /> 105 ADAMS STREET 13031 9 6 3-2 5 81 <br /> CHICAGO 60603 TWX <br /> May 26, 1982 91092968949109296897 <br /> 109296894s1os2ssass <br /> Mr. Jim Herron <br /> Mined Land Reclamation <br /> 1313 Sherman St . '_!f jgb? <br /> Denver, Colorado 80203 <br /> Re : Technical Revision Tunnel Refuse Pile; <br /> Temporary Trommel Screen Rock Disposal <br /> Dear Jim, <br /> We hereby request permission temporarily to dispose of <br /> trommel screen rock on the tunnel refuse pile. <br /> Due to space restrictions on our old coal refuse pile <br /> we need additional space until our new refuse-disposal area <br /> is permitted and constructed (est . June 1983) . <br /> The trommel screen rock is 6" to 10" in dia. (90% roof <br /> rock out of Mines 1, 2 , 3 and 5) . Total trommel screen rock <br /> per month averages 1, 042 tons, or 12 , 500 tons per year (total <br /> that will be added to tunnel fill) . <br /> We will run an analysis on trommel screen rock itself ; <br /> but included in this letter also is the roof rock analysis <br /> from our application. <br /> In Volume 2 , Appendix 11-B-5 Rock Tunnel Project--the <br /> Lincoln-Devore report , Slope Stability Analysis, page 30 I <br /> quote: "The compacted fill will probably behave as a clay. " <br /> and "It is unlikely that the fill itself will ever become <br /> saturated. " Taking these statements into consideration, if <br /> we deposit the trommel screen rock in 1. 0 foot lifts and stop <br /> the lift horizontally 4. 0 feet from the outside of the pile, <br /> then deposit tunnel rock on top, we will have a sandwich <br /> effect that will not only be environmentally sound, but will <br /> have good stability as well . <br /> On page 39 of the Lincoln-Devore report , "A rough cal- <br /> culation of the volume of the fill based on these (Mid- <br /> Continent ' s) sections indicated a potential yardage of about <br /> 500, 000 cubic yards of fill . " <br />