TABLES 



Table 2.1 Water-Quality Objectives 5 



Table 3.1 Recommended Water-Quality Objectives and Excursions, 2005 Sampling 



Program, East Poplar River at International Boundary 18 



Table 3.2 Geologic Formation Name Equivalence between Saskatchewan and Montana .... 21 



Table 3.3 Water-Quality Statistics for Water Pumped from Supplementary 



Water Supply Project Wells 26 



Table 3.4 Water-Quality Statistics for Water Pumped from Salinity Control Project 



Wells Sampled at the Discharge Pipe 27 



Table 3.5 Cookson Reservoir Storage Statistics for 2005 31 



Table 3.6 Streamflow Measurement Results for September 2005 33 



FIGURES 



Figure 3.1 Discharge during 2005 as Compared with the Median Discharge from 



1931-2000 for the Poplar River at International Boundary 6 



Figure 3.2 Flow Hydrograph of the East Poplar River at International Boundary 8 



Figure 3.3 Cumulative Volume Hydrograph of On-Demand Release 9 



Figure 3.4 Monthly Mean TDS Concentration for 2005 Derived from Water-Quality 



Samples or Average Mid-month Monthly Conductance Data Collected by 



Specific-Conductance Monitor at East Poplar River at International Boundary ... 12 

 Figure 3.5 Three-Month Moving Flow-Weighted Average TDS Concentration for 



East Poplar River at International Boundary 12 



Figure 3.6 Five- Year Moving Flow-Weighted Average TDS Concentration for 



East Poplar River at International Boundary 13 



Figure 3.7 Daily TDS Concentration, 1990 to 2005, East Poplar River at International 



Boundary 13 



Figure 3.8 Monthly Mean Boron Concentration for 2005 Derived from Water-Quality 



Samples or Average Mid-Month Monthly Conductance Data Collected by 



Specific-Conductance Monitor at East Poplar River at International 



Boundary 15 



Figure 3.9 Three-Month Moving Flow-Weighted Average Boron Concentration for 



East Poplar River at International Boundary 15 



Figure 3.10 Five- Year Moving Flow-Weighted Average Boron Concentration for 



East Poplar River at International Boundary 16 



Figure 3.11 Daily Boron Concentration, 1990 to 2005, East Poplar River at 



International Boundary 16 



Figure 3.12 Supplementary Water Supply 19 



Figure 3.13 Pumpage from Salinity Control Project 21 



Figure 3.14 Hydrograph of Selected Wells - Cookson Reservoir Supplementary Supply 



Ground Water Monitoring Network 23 



Figure 3.15 Hydrograph of Selected Wells - Cookson Reservoir Supplementary Supply 



Ground Water Monitoring Network 23 



Figure 3.16 Hydrograph of Selected Wells - Fort Union and Hart Coal Aquifers 24 



Figure 3.17 Hydrograph of Selected Wells - Alluvium and Fox Hills/Hell Creek Aquifers 25 



Figure 3.18 Total Dissolved Solids in Samples from Montana Wells 30 



Figure 3.19 Cookson Reservoir Daily Mean Water Levels for 2005 and Median 



Daily Water Levels, 1994-2004 32 



