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The ash disposal reports detailing the monthly disposal activities at the <br />Keenesburg Site, are also found in this section. <br />Mine Waste Rock Disposal <br />CEC received approval from CDMG (Minor Revision #34), CDPHE and <br />from Weld County, to dispose of certain mine waste rock at the Keenesburg <br />Mine site. During 1998 and 1999 a total of 12,467 tons of mine waste rock, <br />from sites in the Clear Creek drainage near Idaho Springs, were transported <br />to the Keenesburg site. This material has been placed, in a layer <br />approximately four feet thick, between "lifts" of ash in the existing disposal <br />pit (B-Pit). The specific intent of the method of mine waste rock placement, <br />as described in MR #34, was to minimize the possibility for any future <br />contamination from this material. <br />No additional mine waste rock was received for disposal during the calendar <br />year 2005. The total quantity of this material placed at the site remains at <br />12,467 tons. The location and horizontal extent of the mine waste rock has <br />been identified on the Existing Surface Features and Utilities Map (page <br />134). <br /> <br />AHR-2005 -92- <br />