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Peabody Investments Corporation (Peabody) is developing the Peabody Sage <br />Creek Mine to the southwest of Steamboat Springs, Colorado (Figure 2, <br />Peabody 2009). Monitor well COV23 (Wadge Coal Overburden, Williams Fork <br />Formation) was chosen for sampling due to its deep depth of 1,194 ft, its <br />flowing condition allowing optimal purging and sampling, the highest bedrock <br />permeability (hydraulic conductivity) for the permit area wells and its location <br />on the permit area. The well was sampled for tritium on 2009 September 21 to <br />determine if drilling fluids had been purged from the well and for all three <br />isotopes on 2009 November 4. <br />The Yampa River was chosen as the surface water site due to its proximity to <br />the development. 'The sampling site was chosen upstream in the watershed to <br />minimize effects of hot springs and coal outcrop drainage. The river was <br />sampled for all three isotopes on 2009 November 4. <br />FIGURE 2- LOCATION MAP OF SAMPLING SITES <br />>P ""7eC?ndEake ?Hi <br />61 'LostLake' wh f <br />? r t <br />MONITOR WELL .COV23 Rabbit <br />HiEtbe 131 ` - <br />00 71 <br />r'-? g > ~r? 4~14 <br />G d 1 ?i t1ce Agee <br />29 Du kyey r eYst?ne ?Bt ktail Mountain. 86 A ay GtE <br />10 <br />a <br />Oak Cr" <br />2 4j , •+ _l <br />f tif, hippsburg 'Sim?son Mountain. 810t, <br />616 <br />13 131 <br />Burro Mountain. 9335 t 15 €2ed fie 9 <br />L Oak Creek <br />1 _1 Oraper'C! <br />'ilia ,? AMPA R N E R __._ <br />Pagoda Peak) 1,120 a Trout Craek J <br />Martrn Da Lake J.' <br />Poos Ereek , Chatfield Reservoir <br />? SOON tv4ourdain.104901 ? Trapper- 46 <br />Blete ake <br />?? Topons}s Creek. <br />b t <br />Wesf Lost Lake 6` 5 nti <br />fw GPS Ma Detail <br />4