2008-01-07_REPORT - C1981041 - Laserfiche WebLink

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SNOWCAP COAL COMPANY South Portal Roadside Refuse Disposal Area Inspection - 4~' Quarter 2007 On December 24, 2007, I performed the required quarterly visual inspection of the Roadside Refuse Disposal Area in accordance with Rule 4.10.2. I, J. E. Stover, P.E., have a wide variety of experience in the design and construction of earth fill embankments. Nothing was observed during the inspection that would indicate the pile has a potential for failure. The pile was lightly snow cover but mostly damp. The terraces were generally snow covered. There was no seepage noted around the pile. The upper diversion ditch was inspected with no problems noted. The maintenance discussed in last quarters report had been performed. The steep and rip-rap plated portion of the north collection ditch was constructed during the quarter. The flat portion of the north collection ditch is nearly connected to the pond. The depth of the non-toxic cover on the top of the pile was checked on August 17, 2006 by excavating five test holes on the top of the pile. All of the test holes had more than 18" of material depth over the refuse. Another test hole was excavated on June 25, 2007. The depth of non-toxic cover was 2.5 feet. A failure of the pile would probably not be a hazard to human life. Even though the pile is fairly close to the Interstate 70 east bound lanes, if the coal mine waste bank failed, it is unlikely the material would move far enough to encroach upon the freeway. I certify that to the best of my knowledge and belief, that the f~l~nd other aspects of the d ~ ~, ~~ Roadside refuse pile have been constructed as permitt~~~~~~f~`~.~~~approved by the ~o eon ~~ ~Q,,~ ov e ~ ~ ; ,,~ ,~ ~ ~ ~Q FYI;~,~'~ ~ ;.~ ~~ 6 ~~ ~~f~~ ~,~ Recommended maintenance: ®~ a ~y'~-~~`% n v ~ G,, -,,, James .,,y~~~~°~ ~~~° Date P.E. No. 192