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The following summarize projected system losses (consumptive use in acre-feet per year) for the <br />remainder of the mine life at anticipated production levels, and with both the existing and new <br />washplants in full operation: <br />Cateeorv <br />Year <br />2007 2008 2009 2010 2011 2012 2013 <br />Coal Production (MM tons per year) <br />Surface Moisture (Coal Shipments) <br />11.5 10.7 11.7 12.0 11.0 9.6 8.4 <br />265.5 247.1 270.2 277.1 254.0 221.8 194.0 <br />Mine Ventilation Losses (evaporative losses due to mine ventilation air flowing through the mine <br />affect ground water, and so do not represent a surface water depletion, given limited hydrologic <br />connection between surface water and the deep water-table aquifers associated with the coal seam and <br />overburden/interburden) <br />Surface Dust Control <br />Washdown Water <br />Evaporative Losses (All Active Ponds) <br />Total System Losses (Consumptive Use) <br />17.7 17.7 17.7 17.7 17.7 17.7 17.7 <br />6.8 6.8 6.8 6.8 6.8 6.8 6.8 <br />14.0 14.0 14.0 14.0 14.0 14.0 14.0 <br />304.0 285.6 308.7 315.6 292.5 260.3 232.5 <br />Again, it is important to note that the majority of the noted total consumptive use comes from ground <br />water sources, with continual ground water recharge, as indicated by the attached water balance. Since <br />• there aze minimal withdrawals from area surface drainages (limited to use of collected surface runoff <br />and spoil spring discharge from Pond A), and essentially little or no mine-related discharge to area <br />streams, the potential is negligible for the noted consumptive uses to significantly affect flows in the <br />Yampa/Green/Colorado River system, or the associated endangered fish species. <br />Please feel free to contact me with any questions regarding this submittal or related matters at (970) <br />870-2712. <br />Best regazds, <br />Twentymile Coal Company <br />Jerry M. Nettleton <br />Environmental Manager <br />cc: Byron Walker/CDRMS <br />I• <br />