TABLES 



Water-Quality Objectives 4 



Recommended Water-Quality Objectives and Excursions, 1995 Sampling 



Program, East Poplar River at the International Boundary 17 



Water-Quality Statistics for Water Pumped from Supplementary 



Water Supply Project Wells Sampled at Site "C3 " on Girard Creek 23 



Water-Quality Statistics for Water Pumped from Soil Salinity Project 



Wells Sampled at the Discharge Pipe 24 



Cookson Reservoir Storage Statistics for 1995 29 



Streamflow Measurement Results for August 25, 1995 31 



FIGURES 



Figure 3.1 Discharge during 1995 Compared with the Median Discharge for 1961-1990 for the 



Poplar River at the International Boundary 6 



Figure 3.2 Flow Hydrograph of the East Poplar River at 



the International Boundary 7 



Figure 3.3 TDS Concentrations for 1995 Grab Samples from East Poplar River 



at the International Boundary 10 



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



East Poplar River at the International Boundary 10 



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



Poplar River at the International Boundary 12 



Figure 3.6 Daily TDS Concentration, 1982 to 1995, East Poplar River 



at the International Boundary 12 



Figure 3.7 Boron Concentrations for 1995 Grab Samples from East Poplar 



River at the International Boundary 14 



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



Poplar River at the International Boundary 14 



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



Poplar River at the International Boundary 15 



Figure 3.10 Daily Boron Concentration, 1982 to 1995 East Poplar River 



at the International Boundary 15 



Figure 3.11 Drawdown for Hart Seam Aquifer as of December 1995 20 



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



Salinity Projects as of December 1995 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 1995 and Mean Daily 



Monthly Water Levels for 1981-1991 29 



-u 



