The potentiometric surface in the Fox Hills/Hell Creek artesian aquifer (well 11) has shown very little 

 fluctuation or change throughout the 25-year (1979-2003) monitoring period. 



Water levels in monitoring wells (5, 8, 10, 23, and 24) that penetrate the alluvial and/or outwash aquifer 

 show considerable fluctuation due to seasonal and/or pumping changes. Hydrographs of selected alluvial 

 wells (10, 23, and 24) and the Fox Hills well (11) are shown in Figure 3.14. 



Hydrograph of Selected Wells 



Alluvium and Fox Hills Aquifers 



-Well 10 

 -Well 11 

 -Well 23 

 -Well 24 



CD (Q (C ra 



CD (Q m (0 



Figure 3.14 Hydrograph of Selected Wells — Alluvium and Fox Hills Aquifers 



24 



