3.3.2.2 Montana 



Water-levels in monitoring wells (6, 7, 9, 13, 16, 17, 19, and 22) that penetrate the Fort Union 

 Formation and/or Hart Coal Seam rose during 1997 and 1998, and then leveled off or fell between 1999 

 and the end of 2003. Heavy snow accumulation and subsequent melting caused water levels to rise to 

 near record highs in most wells during 2004. Hydrographs of selected Fort Union and Hart Coal Seam 

 wells (6, 7, 17, and 19) are shown in Figure 3.16. 



Hydrographs of Selected Wells 

 Fort Union and Hart Coal Aquifers 



2465 



°^ 



2450 



"'^^^^*^****^'^^'*^^^^ 



2445 



Oi O ^ CNJ CO 



CO CO 00 CO CO GO 



cocOQcotocQconJcQco 



■^LOCDf^OOOOi- 



O3a3a>o>oooo 





Year 





(0 (0 (0 CQ 



-Well 6 (GWIC 4227) -a-Well 7 (GWIC 4267) -A-Well 17 (GWIC 4297) 



-WelM9(GWIC4290) 



Figure 3.16 Hydrograph of Selected Wells - Fort Union and Hart Coal Aquifers 



24 



