- 22 



Water Levels 



Two piezometric pressure maps, dated June and December, 1985, were 

 prepared by Prairie Coal Ltd.-'- Figure 6 was compiled from the December 

 map and shows the cone of depression formed by the pressure contours in 

 the Hart coal seam. The southern extent of the cone of depression at the 

 end of 1985 is unchanged from its position in the previous year. The 

 position of the one metre contour therefore remains at 1.8 kilometres 

 north of the International Boundary. 



Montana 



Quarterly water levels were read in 21 wells in 1985. Wells 5, 10, 14, 



and 15 were equipped with continuous recorders. 



Additional development (flushing, surging, pumping) was done on wells 13 

 through 19, 21 and 22 in May of 1985. This resulted in a readjustment of 

 static water levels in wells 16, 17, 18 and 21. 



Water levels in the 10 original wells continue to fluctuate within one 

 foot from their average values. There appears to be no noticeable impact 

 caused by mine dewatering activity in Saskatchewan. 



1 Effective December 1, 1984, ownership and operation of the Poplar River 

 Mine were transferred from the Saskatchewan Power Corporation to Prairie 

 Coal Ltd. 



