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TABLE OF CONTENTS (continued) 



Page 



Table 3 - Recommended Water Quality Objectives, Excursions 

 and the 1985 Sampling Program, East Poplar River 



at the International Boundary 18 



Table 4 - Data Comparison, June 11, 1985 Sampling Trip 19 



Table 5 - Data Comparability, December 17, 1985 Sampling Trip . . 20 



Table 6 - 1985 Monthly Pumpages from Mine Dewatering Activities. . 21 



Table 7 - Calculated Seepage Rates 28 



Table 8 - Summary of Air Quality Monitoring Results 



During 1985 in Montana 35 



Figure 1 - Poplar River Mine Expansion 



Figure 2 - Discharge During 1985 Compared with Median Discharge for 



1951-80 for the Poplar River at International Boundary . 9 



Figure 3 - Hydrograph of Water Discharge of the East Poplar 

 River at the International Boundary and 

 Recommended Minimum Flow 10 



Figure 4 - (a) Three-Month Flow-Weighted Concentration for TDS; 

 East Poplar River at the International Boundary; 

 (b) Five-Year Flow-Weighted Concentration for TDS; 

 East Poplar River at the International Boundary 14 



Figure 5 - (a) Three-Month Flow-Weighted Concentration for Boron; 

 East Poplar River at the International Boundary; 

 (b) Five-Year Flow-Weighted Concentration for Boron; 

 East Poplar River at the International Boundary 16 



Figure 6 - Cone of Depression in the Hart Coal Seam from 



Dewatering Activities as of December, 1985 23 



Figure 7 - Total Dissolved Solids Concentrations; 



East Poplar River Monitoring Piezometers 25 



Figure 8 - Saskatchewan Maximum Hourly SO2 Air Quality Data .... 32 



Figure 9 - Saskatchewan Maximum Daily SO2 Air Quality Data .... 33 



Figure 10 - Surface Wind Roses 39 



Annex 1 - Poplar River Cooperative Monitori-ng Arrangement, 

 Canada-United States. 



Annex 2 - Poplar River Cooperative Monitoring Arrangement, 



Technical Monitoring Schedules, 1986, Canada-United States 



Annex 3 - Metric Conversions 



