28 



3.3.3.2 Montana 



Samples were collected from monitoring wells 7, 16. and 24 during 1996. Well 7 is completed 

 in Hart Coal, well 16 is completed in the Fort Union Formation, and well 24 is completed in 

 alluvium. No significant changes in water-quality were observed. Graphs of total dissolved solids 

 for selected wells are shown in Figure 3. 14. 



1000 



E 



800 



600 



400 



200 







Jan-80Jan-82Jan-84Jan-86Jan-88Jan-9aJan-92Jan-94Jan-96Jan-98 



DATE 



Figure 3.14 Total Dissolved Solids in Samples from Montana Wells. 



