TABLE OF CONTENTS 



Highlights for 1999 iii 



1.0 Introduction 1 



2.0 Committee Activities 2 



2. 1 Memberships 2 



2.2 Meetings 2 



2.3 Review of Water-Quality Objectives 3 



2.4 Data Exchange 4 



3.0 Water and Air: Monitoring and Interpretations 6 



3.1 Poplar River Power Station Operation 6 



3.2 East Poplar River 6 



3.2.1 Streamflow 6 



3.2.2 Apportionment 7 



3.2.3 Minimum Flows 7 



3.2.4 On-Demand Release 8 



3.2.5 Water Quality 9 



3.2.5.1 Total Dissolved Solids 10 



3.2.5.2 Boron 14 



3.2.5.3 Other Water-Quality Variables 17 



3.3 Ground Water 19 



3.3.1 Operations 19 



3.3.2 Ground- Water Levels 21 



^'' 3.3.2.1 Saskatchewan 21 



3.3.2.2 Montana 23 



3.3.3 Ground- Water Quality 26 



3.3.3. 1 Saskatchewan 26 



3.3.3.2 Montana 30 



3.4 Cookson Reservoir 31 



3.4.1 Storage 31 



3.4.2 Water Quality 33 



3.5 Air Quality 33 



3.6 Quality Control 33 



3.6.1 Streamflow 33 



3.6.2 Water-Quality 34 



ANNEXES 



1 .0 Poplar River Cooperative Monitoring Arrangement, 



Canada-United States Al 



2.0 Poplar River Cooperative Monitoring Arrangement, Technical 



Monitoring Schedules, 1 999, Canada-United States A2 



3.0 Recommended Flow Apportionment in the Poplar River Basin A3 



4.0 Metric Conversions A4 



