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• MASS BALANCE <br />CEC disposed of 62,148 tons of mixed fly and bottom ash, received from the <br />Trigen Colorado Energy Corporatioi>/Coors (see Ash Disposal Data) facility, <br />in "A" Pit using approximately 6,720 bank cubic yards* (BCY) of overburden <br />material to cover the disposal areas locally**, and to control dust and fugitive <br />debris in the immediate area of the pit. Again, relatively small amounts of <br />overburden were excavated from the Long Term Spoil area since, as an <br />additional portion of the "A" Pit haul road was reclaimed, it became the <br />source of spoil material for the "A" Pit reclamation. Approximately 26,720 <br />BCY of topsand were moved from the topsand piles A-1 and B-1 to complete <br />the reclamation of portions of; 1) the "A" Pit haul road, 2) areas south and <br />southeast of the present south end of "B" Pit, and 3) a small area west of "A" <br />Pit, in order that these areas could accommodate the 1997seeding activity. <br />Remaining B-Pit Airspace Volume 1,782,100 BCY <br />(to proposed final reclamation contours) <br />Remaining A-Pit Airspace Volume*** 108,000 BCY <br />• (to proposed final reclamation contours) <br />Excess Long-term Spoil Remaining On Site 346.800 BCY <br />Topsa~~d Stockpiled On Site 362,900 BCY <br />* Denoted as "cubic yards in-place". <br />** This amount is smaller than the amound recorded for previous years cover <br />effort due principally to the "confined" nature of A Pit and the mamrer <br />in which fill was accomplished. <br />*** Variation in the "A" pit airspace volumes (] 994 versus subsequent AHR <br />reports) results from the initial use of the 1986 reclamation plan to <br />compute airspace volume, whereas 1995 and later calculations rely on <br />the current plan for final post-mining contour and the current drainage <br />plan configuration. <br /> <br />AHR-1997 -t?q- ST[PIJt.AT10N ftl7 <br />