26 



The potentiometric siirface in the Fox Hills/Hell Creek artesian aquifer (well 1 1) has shown very little 

 fluctuation or change throughout the 21 year (1979-2000) 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; however, they rose 

 during the period 1996 to 1998 and leveled off during 1999 and 2000. Hydrographs of selected alluvial 

 wells (10, 23, and 24) and Fox Hills well (1 1) are shown in Figure 3.17. 



Hydrograph of Selected Wells 



Alluvium and Fox Hills Aquifers 



I 2428 



c 



1 



I 2426 



UJ 



I 



-W10 

 -W11 

 -W23 

 -VV24 



Jan-79 Jan-81 Jan-83 Jan-85 Jan-87 Jan-89 Jan-91 Jan-S3 Jan-95 Jan-97 Jan-99 Jan-01 



Figure 3.17 Hydrograph of Selected Wells - Alluvium and Fox Hills Aquifers 



