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 were rising during 1997 and 1998, and have leveled off or decreased 

 during the last five years (1999 to 2003). Hydrographs of selected Fort Union and Hart Coal Seam wells 

 (6, 7, 17, and 19) are shown in figure 3.13. 



Hydrograph of Selected Wells 



Fort Union and Hart Coal Aquifers 



-Well 6 

 -Well 7 

 -Well 17 

 -Well 19 



CO CO CO 00 



cbooGoooooo>ooo>^d)0)0)o>o)ooooooo 



<0(0(Dfl3Ct](T]n](Q(Q(D(D(D(OCDn)(13(Ofl3CDCO(D(DCO{a(0(U(0(D 



—> —i —3 —> ~y 



—i —3 —> —i 



Figure 3.13 Hydrograph of Selected Wells — Fort Union and Hart Coal Aquifers 



23 



