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• <br />• <br />III IIIIIIIIIIIII III <br />September 12, 2001 <br /> <br />Lorencito Coal Company, LLC <br />c/o Greystone <br />5231 South Quebec <br />Greenwood Village, Colorado 80111 <br />Attention: Mr. Mike Kolin <br />Mr. Jerry Koblitz <br />Subject: Response to CDMG Comments (#2) <br />Lorencito Surface Mine, Phase I <br />Las Animas County, Colorado <br />Job No. 32,611 <br />/~~ ~, <br />Enclosed are revised copies of Figure 1, Site MaplTest Pit locations. The <br />revisions include: <br />Phase I line for the surface mine was moved west to include Fills 1, 2 <br />and 3. Stability Analysis of these fills was addressed in our August 15, <br />2001 letter. <br />2. Pond locations were revised to match the 5-Year Mine Plan, by <br />Greystone, Map 2.05.3-2, dated 8130101. <br /> <br />We also clarity the text of our original report (dated April 27, 2001) on page 2. <br />We anticipate 8 ponds below the area mine and 14 ponds below the contour mine <br />area as shown on the revised Figure 1. Our analysis considered ponds with an <br />embankment height of 10 feet or less with a base slope of 10 percent or less (sand <br />foundation soils), or 20 percent or less (clay or bedrock foundation). <br />We hope this provides the infonnation you require. Please call if you have any <br />questions. <br />Very truly yours, <br />Mark4a. Gray, P:I <br />Project Manager <br />MGG/ha <br />(7 copies sent) <br />CTL/THOMPSON, INC. <br />CONSULTING ENGINEERS <br />1971 WEST 12TH AVENUE ~ DENVER, COLORADO 80204 ~ (303) 825-0777 <br />