TABLES 



Table 2.1 Water-Quality Objectives 4 



Table 3.1 Recommended Water-Quality Objectives and Excursions, 1996 Sampling 



Program, East Poplar River at the International Boundary 16 



Table 3.2 Water-Quality Statistics for Water Pumped from Supplementary 



Water Supply Project Wells 23 



Table 3.3 Water-Quality Statistics for Water Pumped from Soil Salinity Project 



Wells Sampled at the Discharge Pipe 24 



Table 3.4 Cookson Reservoir Storage Statistics for 1996 29 



Table 3.5 Streamflow Measurement Results for July 21, 1996 31 



FIGURES 



Figure 3.1 Discharge during 1996 Compared with the Median Discharge for 1961-1990 for the 



Poplar River at the International Boundary 5 



Figure 3.2 Flow Hydrograph of the East Poplar River at 



the International Boundary 7 



Figure 3.3 TDS Concentrations for 1996 Grab Samples from East Poplar River 



at the International Boundary 9 



Figure 3.4 Three-Month Moving, Flow-Weighted TDS Concentration for 



East Poplar River at the International Boundary 9 



Figure 3.5 Five- Year Moving, Flow- Weighted TDS Concentration for East 



Poplar River at the International Boundary 11 



Figure 3.6 Daily TDS Concentration, 1982 to 1996, East Poplar River 



at the International Boundary 11 



Figure 3.7 Boron Concentrations for 1996 Grab Samples from East Poplar 



River at the International Boundary 13 



Figure 3.8 Three-Month Moving, Flow- Weighted Boron Concentration for East 



Poplar River at the International Boundary 13 



Figure 3.9 Five- Year Moving, Flow-Weighted Boron Concentration for East 



Poplar River at the International Boundary 14 



Figure 3.10 Daily Boron Concentration, 1982 to 1996 East Poplar River 



at the International Boundary 14 



Figure 3.11 Drawdown for Hart Seam Aquifer as of December 1996 20 



Figure 3.12 Cone of Depression in the Empress Sands Due to the 



Salinity Projects as of December 1996 21 



Figure 3.13 Hydrographs of Selected Wells 22 



Figure 3.14 Total Dissolved Solids in Samples from Montana Wells 28 



Figure 3.15 Cookson Reservoir Mean Daily water Levels for 1996 and Mean Daily 



Monthly Water Levels for 1981-1991 30 



u- 



