25 



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 dropped 

 slightly during 1999, 2000, and 2001. Hydrographs of selected Fort Union/Hart Coal wells (6, 7, 17, 

 and 1 9) are shown in figure 3.16. 



-Well 6 

 -Well 7 

 -Well 17 

 -Well 19 



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



