Figure 21. Sen Slope estimate for boron at East Poplar River at 



International Boundary 27 



Figure 22. Three-month moving, flow-weighted boron concentration 



for East Poplar River at International Boundary 28 



Figure 23. Five-year moving, flow-weighted boron concentration for 



East Poplar River at International Boundary 29 



Figure 24. Box plots of mercury levels in edible fish in Cookson 



Reservoir from 1979 to 1983 30 



Figure 25. TDS concentrations for 1990 grab samples from East 



Poplar River at International Boundary 33 



Figure 26. Boron concentrations for 1990 grab samples from East 



Poplar River at International Boundary 34 



Figure 27. TDS concentrations in Cookson Reservoir at Morrison Dam 



for the period 1981-90 38 



Figure 28 . Boron concentrations in Cookson Reservoir at Morrison 



Dam for the period 1981-90 39 



Figure 29. Sulphate concentrations in Cookson Reservoir at Morrison 



Dam for the period 1981-90 40 



Figure 30 . Cone of depression in the Hart Coal Seam from dewatering 



activities as of December 1990 45 



Figure 31. Cone of depression in the Hart Coal Seam from dewatering 



activities as of 1988 46 



Figure 32 . Cone of depression in Empress aquifer from dewatering 



activities of salinity project as of December 1990 . . . .49 



Figure 33. Hydrographs for selected coal wells completed in Hart 



Coal Bed 50 



Figure 34. Hydrographs for GWQQC 5, GWQQC 10, and GWQQC 16 51 



Figure 35. TDS in till piezometers C726A and C726C 53 



Figure 36. TDS in Empress piezometers C726E and C728E 54 



Figure 37. Water levels in Empress piezometers C726E and C728E. . . .54 



Figure 38. TDS in till piezometers C728A, C278B, C728C, and C728D . .56 



Figure 39. Chloride in till piezometers C728A, C728B, C728C, and 



C728D 56 



Figure 40. Boron in till piezometers C728A, C728B, C728C, and 



C728D 57 



Figure 41. Water levels in till piezometers C728A, C728B, C728C, 



and C728D 57 



