S Annual report of the 
333 91 Governments of 
M26prar Canada, United States. 
1991 Saskatchewan and 
Montana. 



>91 ANNUAL REPORT 



tofte 



GOVERNMENTS OF CANADA, UNITED STATES, 
SASKATCHEWAN AND MONTANA 



STATE DOCUMENTS COLLECTIOtl 

Mi 2 - 1993 

MONTANA STATE LIBRARY 

1515 E. 6th AVE. 
HELENA, MONTANA 59620 




by the 

POPLAR RIVER 
BILATERAL MONITORING COMMTITEE 



MBSOOBIIVn 



COVERING CAI£NDQl YEAR 1991 



Fetnayl993 



«-.w. 



m ^^^i ^^-'. 






v^ ii I 



s\. 



Montana State Library 



3 0864 1004 5764 



1991 ANNUAL REPORT 



to the 



GOVERNMENTS OF CANADA, UNITED STATES, 
SASKATCHEWAN AND MONTANA 




by the 

POPLAR RIVER 
BILATERAL MONITORING COMMTTTEE 



IflSSOUn KIVES 



COVERING CAIBJDER YEAR 1991 



Fehruary 1993 



POPLAR RIVER BILATERAL MONITORING COMMITTEE 



Department of State 
Washington, D.C., United States 



Department of External Affairs 
Ottawa, Ontario, Canada 



Governor's Office 

State of Montana 

Helena, Montana, United States 



Saskatchewan Environment and 

Public Safety 
Regina, Saskatchewan, Canada 



Ladies and Gentleman: 

During 1991, the Poplar River Bilateral Monitoring Committee continued to fulfil 
the responsibilities assigned by the governments under the Poplar River 
Cooperative Monitoring Arrangement dated September 23, 1980. Water quantity, 
water quality, and air quality relevant to the International Boundary were 
monitored in accordance with the 1991 Technical Monitoring Schedule. The 
monitoring data were exchanged on a quarterly basis. 

This annual report is the eleventh of a series covering the period 1981-91. The 
report summarizes environmental conditions in the basin and discusses Committee 
activities for 1991. Conditions are compared to guidelines for specific 
parameter values that were developed by the International Joint Commission under 
the 1977 Reference from Canada and the United States. References are made to 
State, Provincial, or Federal standards or objectives where these are relevant. 
After examination and evaluation of the monitoring information for 1991, the 
Committee finds that the measured conditions meet the recommended objectives. 

During 1991, monitoring continued with only minor changes in the schedules from 
1990. Ash surcharging was implemented to reduce the need for building new 
lagoops. 

In March 1991, the five-year extension of the Cooperative Monitoring Arrangement 
expired. Steps were taken to extend the arrangement for another five years. 

Herein is the eleventh annual report of the Poplar River Bilateral Monitoring 
Committee. 



Yours sincerely. 



J./R. Knapton / 

Chair, United States Section 




R. A. Halliday V 
Chair, Canadian Section 



7/ , / 



A. Wittich 

Member, United States Section 



/. 




D. D. Nargang 

Member, Canadian Section 



TABLE OF CONTENTS 

Highlights for 1991 vii 

1 .0 Introduction 1 

2.0 Poplar River Power Station 4 

2.1 Operations 4 

2.2 Construction 5 

2.3 Unusual Events 7 

2.4 LIFAC 7 

2.5 Scribner Dam 8 

3.0 East Poplar River 10 

3.1 Streamflow 10 

3.2 Apportionment 10 

3.3 Minimum Flows 11 

3.4 On-Demand Release 12 

3.5 Water Quality 13 

3.5.1 Total Dissolved Solids 14 

3.5.2 Boron 18 

3.5.3 Other Water Quality Variables 21 

3.6 Quality Control 23 

3.6.1 Streamflow 23 

3.6.2 Water Quality 23 

4.0 Supplementary Water Supply (Old Coal Mine Dewatering) 25 

4.1 Operations 25 

4.2 Pumpage Volumes 25 

4.3 Groundwater Levels 26 

4.3.1 Saskatchewan 26 

4.3.2 Montana 28 

4.4 Groundwater Quality 29 

4.4.1 Saskatchewan 29 

4.4.2 Montana 32 

5.0 Soil Salinity Project Below Morrison Dam 33 

5.1 Operations 33 

5.2 Pumpage Volumes 33 

5.3 Groundwater Levels 35 

5.3.1 Saskatchewan 35 

5.3.2 Montana 35 



- 1 - 



5.4 Groundwater Quality 36 

5.4.1 Saskatchewan 36 

5.4.2 Montana 38 

6.0 Cookson Reservoir 39 

6.1 Storage 39 

6.2 Water Quality 41 

6.3 Mercury In Cookson Fish 46 

6.4 Morrison Dam Inspection 48 

7.0 Ash Lagoons 49 

7.1 Operations 49 

7.2 Ash Lagoon Inspections 49 

7.3 Dyke Stability 50 

7.4 Lagoon Water Levels 51 

7.5 Lagoon Seepage Estimates 52 

7.6 Lagoon Water Quality 54 

7.7 Interceptor Trench 64 

7.8 Leachate Review 67 

7.9 Ash Surcharging 69 

8.0 Sewage Holding Pond 73 

8.1 Operations 73 

8.2 Pond Quality 73 

9.0 Air Quality 75 

9.1 Saskatchewan Environment and Public Safety 75 

9.2 SaskPower 77 

9.3 In-Stack Monitoring 78 

10.0 References Cited 79 

ANNEXES 

1.0 Cooperative Monitoring Arrangement A1-1 

Canada-United States 

2.0 Technical Monitoring Schedules A2-1 

3.0 Reports Reviewed A3-1 

4.0 Recommended Flow Apportionment A4-1 

5.0 Leachate Review A5-1 

6.0 Metric Conversions A6-1 



TABLES 



Table 1.1 


Table 2.1 


Table 2.2 


Table 2.3 


Table 3.1 


Table 3.2 


Table 4.1 


Table 4.2 


Table 5.1 


Table 5.2 


Table 5.3 


Table 6.1 


Table 7.1 


Table 7.2 


Table 8.1 



1991 Membership of the Poplar River Bilateral Monitoring Committee 2 

1991 Monthly Capacity Factors, Poplar River Power Station 4 

1991 Monthly Gross MW/h and Fuel Consumption, 

Poplar River Power Station 6 

Scribner Dam Testing - 1991 , Poplar River Power Station 9 

Recommended Water Quality Objectives and Excursions, 
1991 Sampling Program, East Poplar River at the International 
Boundary (units in mg/L except as otherwise noted) 22 

Streamflow Measurement Results for May 30, 1991 23 

Supplementary Supply Monthly Pumpages 26 

Poplar River Power Station, Supplementary Water Supply Project 

to Cookson Reservoir Discharge Pipe Average Analysis - 1991 ... 30 

Salinity Project, Monthly Pumpages 34 

Individual Salinity Project Wells, Pumpage Volumes 34 

Poplar River Power Station, Salinity Project South of Morrison 

Dam Water Quality from Discharge Pipe Location - 1991 37 

Cookson Reservoir Storage Statistics for 1991 39 

Ash Lagoon Seepage Rates and Liner Permeabilities, 

Poplar River Power Station, October 1991 53 

Water Quality for Lagoon Pumpwells DG1 and DG2, 

at Poplar River Power Station 66 

Waste Water Data, November 1991 , Poplar River Power Station . . 74 



- Ill - 



FIGURES 

Figure 2.1 Production History 1981 - 1991, Poplar River Power Station 5 

Figure 2.2 Fuel Consumption 1981 - 1991, Poplar River Power Station 6 

Figure 3.1 Discharge during 1991 Compared with the Median Discharge for 

1961-1990 for the Poplar River at the International Boundary 11 

Figure 3.2 Flow Hydrograph of the East Poplar River at the International Boundary 12 

Figure 3.3 TDS Concentrations for 1991 Grab Samples from East Poplar River 

at the International Boundary 15 

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

East Poplar River at the International Boundary T5 

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

Poplar River at the International Boundary 17 

Figure 3.6 Sen Slope Estimate for TDS at East Poplar River at the International 

Boundary 17 

Figure 3.7 Boron Concentrations for 1991 Grab Samples from East Poplar 

River at the International Boundary 19 

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

Poplar River at the International Boundary 19 

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

Poplar River at the International Boundary 20 

Figure 3.10 Sen Slope Estimate for Boron at East Poplar River at the 

International Boundary 20 

Figure 4.1 Cone of Depression in the Hart Coal Seam from Dewatering 

Activities as of December 1991 27 

Figure 4.2 Hydrographs for Selected Wells, 1979 to 1991 29 

Figure 4.3 TDS for Selected Discharge Points, 1990 and 1991 31 

Figure 4.4 Boron for Selected Discharge Points, 1990 and 1991 31 

- iv - 



Figure 4.5 TDS for Selected Wells in the Hart Seam 32 

Figure 5.1 Water Quality Data from Discharge Pipe Location, South of 

Morrison Dam, 1990 and 1991 36 

Figure 6.1 Cookson Reservoir Mean Daily Water Levels for 1991 and 

Median Monthly Water Levels for 1981-1990 40 

Figure 6.2 Cookson Reservoir Water Quality Data for Boron, 1983 to 1991 42 

Figure 6.3 Cookson Reservoir Water Quality Data for Sulphate, 1983 to 1991 ... 42 

Figure 6.4 Cookson Reservoir Water Quality Data for Sodium, 1983 to 1991 .... 43 

Figure 6.5 Cookson Reservoir Water Quality Data for Chloride, 1983 to 1991 ... 43 

Figure 6.6 Cookson Reservoir Water Quality Data for TDS, 1983 to 1991 44 

Figure 6.7 Cookson Reservoir Water Quality Data for Manganese, 1983 to 1991 . 44 

Figure 6.8 Cookson Reservoir Water Quality Data for Strontium and Fluoride, 

1983 to 1991 45 

Figure 6.9 Box and Whisker Plots of Tissue Mercury Concentration in Fish 

from Cookson Reservoir from 1979 to 1991 47 

Figure 7.1 Ash Lagoon Water Levels and Polishing Pond Level, 1983 to 1991 . . 51 

Figure 7.2 Lagoon Water Quality Data for Conductivity and Polishing Pond 

Volume, 1983 to 1991 56 

Figure 7.3 Lagoon Water Quality Data for Vanadium and Polishing Pond 

Volume, 1983 to 1991 56 

Figure 7.4 Lagoon Water Quality Data for Chromium and Polishing Pond 

Volume, 1983 to 1991 57 

Figure 7.5 Lagoon Water Quality Data for Fluoride, Molybdenum and Polishing 

Pond Volume, 1983 to 1991 57 

Figure 7.6 Lagoon Water Quality Data for Sodium, Sulphate and Polishing 

Pond Volume, 1983 to 1991 59 



V - 



Figure 7.7 Lagoon Water Quality Data for Potassium, Strontium and Polisliing 

Pond Volume, 1983 to 1991 59 



Figure 7.8 Lagoon Water Quality Data for Uranium and Polishing Pond Volume, 

1983 to 1991 60 

Figure 7.9 Lagoon Water Quality Data for Calcium and Polishing Pond Volume, 

1983 to 1991 60 

Figure 7.10 Lagoon Water Quality Data for Calcium and Polishing Pond pH, 

1983 to 1991 61 

Figure 7.1 1 Lagoon Water Quality Data for Magnesium and Polishing Pond pH, 

1983 to 1991 61 

Figure 7.12 Lagoon Water Quality Data for Boron and Polishing Pond Volume, 

1983 to 1991 63 

Figure 7.13 Lagoon Water Quality Data for Boron and Polishing Pond pH, 

1983 to 1991 63 

Figure 7.14 Boron in Piezometer C712B 70 

Figure 7.15 Chloride in Piezometer C712B 70 

Figure 7.16 Dykes on Ash Lagoons, December 31, 1991 72 

Figure 9.1 Maximum Daily SO2 Air Quality Data, Coronach Water Treatment 

Plant, 1981 to 1991, (Saskatchewan 24-hour standard) 76 

Figure 9.2 Maximum Hourly SOj Air Quality Data, Coronach Water Treatment 

Plant, 1981 to 1991, (Saskatchewan 1-hour standard) 76 



VI 



HIGHLIGHTS FOR 1991 

The Poplar River Power Station completed its eighth full year of operation in 1991. The 
two 300-megawatt coal-fired units generated 4 534 000 gross megawatt hours of 
electricity with the average capacity factors for Units No. 1 and 2 recorded at 88.7% and 
86.2% respectively. 



Monitoring information collected in both Canada and the United States was exchanged 
quarterly. In general, the sampling locations, frequency of collection, and parameters met 
the requirements identified in the 1991 Technical Monitoring Schedules set forth in the 
1990 annual report. 

Regional drought conditions continued, resulting in below normal streamflow in the Poplar 
River basin for the fifth consecutive year. The March to October recorded flow at the 
International Boundary was 3 720 cubic dam^ or 37% of the 1931 to 1990 median 
seasonal flow. A volume of 459 dam^ was delivered to Montana between May 1 and May 
30 to meet the apportionment recommendations of the IJC. 

On January 1 , 1 991 , Cookson Reservoir storage was only 54% of the full-supply volume. 
Reservoir contents reached a maximum of 26 700 dam^ in July. 1991 reservoir levels 
were below ten-year median levels. The net effect of little spring runoff over the last 
several years has been a decrease in reservoir water quality. 



VII 



The concentrations of total dissolved solids (TDS) and boron in the East Poplar River 
were below the long-term and short-term objectives recommended to Governments by 
the International Joint Commission. However, the five-year flow-weighted concentrations 
(FWCs) for TDS increased to 950 mg/L, only slightly below the long-term objective of 
1000 mg/L TDS. The five-year boron FWCs remained well below the long-term objective 
of 2.5 mg/L boron. The 4.0 mg/L objective for dissolved oxygen was exceeded once. 
Quality control sample splits showed less than acceptable comparability between 
Canadian and United States laboratories for some water quality variables. 

The water quality of the common discharge point from the salinity wells is better than that 
of the reservoir. 

Suspended particulate concentrations exceeded Saskatchewan Environment and Public 
Safety's 24-hour standard on two occasions. However, these exceedances are believed 
to have been caused by field-blown dust. 

An estimated 487 830 m^ of ash and 224 200 m^ of supply water were added to the ash 
lagoons in 1 991 . Regular inspections showed no signs of dyke misalignment or seepage. 
A more detailed inspection, conducted by an outside consultant, confirmed that the lagoon 
dykes and liners have good integrity and the ash is contained effectively. 

Extensive testing of the LIFAC desulphurization process took place in the first half of the 



VIII 



year. Operation of the LIFAC unit, built in 1 990 to help reduce sulphur dioxide emissions, 
is based on a limestone injection system. 



V-w^-.j 



-IX- 



1.0 INTRODUCTION 

The Poplar River Bilateral Monitoring Committee was authorized for an initial period of 
five years by the Governments of Canada and the United States under the Poplar River 
Cooperative Monitoring Arrangement dated September 23, 1980. A copy of the 
Arrangement is attached to this report as Annex 1 . On March 12, 1987, the Arrangement 
was extended by the Governments for four years to March 1991 . The Arrangement was 
further extended for another five years to March 1996, following a request from the 
Committee in 1991. A more detailed account of the historical background of the 
Monitoring Arrangement is contained in the 1990 Annual Report of the Poplar River 
Bilateral Monitoring Committee. 

The Committee is composed of representatives of the Government of the United States 
of America, the State of Montana, and the Government of Canada and the Province of 
Saskatchewan. In addition to the representatives of Governments, two ex-officio 
members who are local representatives of the State of Montana and Province of 
Saskatchewan participate in the activities of the Committee. 



During 1991. the member and ex-officio members of the Committee were: 



Table 1.1 1991 Membership of the Poplar River Bilateral Monitoring Committee 



United States Section 


Canadian Section 


Mr. J. R. Knapton 
U.S. Geological Survey 
Chairman 


Mr. R. A. Halliday 
Environment Canada 
Chairman 


Mr. A. Wittich 
Governor's Office 
Member 


Mr. D. D. Nargang 
Saskatchewan Environment 
and Public Safety 
Member 


Mr. C. W. Tande 

Daniels County Commissioner 

Ex-Officio Member, Montana 


Mr. J. R. Totton 

Reeve, R.M. of Hart Butte 

Ex-Officio Member, Saskatchewan 



The monitoring programs are in response to potential impacts of a transboundary nature 
resulting from SaskPower's (formerly Saskatchewan Power Corporation) coal-fired thermal 
generating station and ancillary operations near Coronach, Saskatchewan. Monitoring 
is conducted in Canada and the United States at or near the International Boundary for 
quantity and quality of both surface and ground water and for air quality. Participants 
from both countries, including Federal, Provincial and State agencies, are involved in 
monitoring. 



The Committee submits an annual report to Governments which summarizes the 
monitoring results, evaluates apparent trends, and compares the data to objectives or 
standards recommended by the International Joint Commission (IJC) to Governments, or 
relevant State, Provincial, or Federal standards. The Committee reports to Governments 



3 

on a calendar year basis, with the report for 1991 being the eleventh in the series. The 
Committee is also responsible for drawing to the attention of Governments definitive 
changes in monitored parameters which may require immediate attention. 

A responsibility of the Committee is to review the adequacy of the monitoring programs 
In both countries and make recommendations to Government on the Technical Monitoring 
Schedules. The Schedules are updated annually for new and discontinued programs and 
for modifications in sampling frequencies, parameter lists, and analytical techniques of 
ongoing programs. The Technical Monitoring Schedules listed in the annual report 
(Annex 2) are given for the forthcoming year. The Committee will continue to review and 
propose changes to the Technical Monitoring Schedules as information requirements 
change. 

Another responsibility of the Committee has included an ongoing quarterly exchange of 
data acquired through the monitoring programs. The exchange of monitoring information 
was initiated with the first quarter of 1 981 , and was an expansion of the informal quarterly 
information exchange program initiated between Canada and the United States in 1976. 
At the request of the Committee, the two governments approved replacement of the 
quarterly data exchange by an annual exchange effective at the start of the 1 992 calendar 
year. Special reports dealing with aspects of monitoring and monitoring results requested 
by the Committee are sometimes published. Reports reviewed by the Committee during 
1991 are identified in Annex 3. Exchanged data and reports are available for public 
viewing at the agencies of the participating governments or from Committee members. 



2.0 POPLAR RIVER POWER STATION 

2.1 Operations 

Table 2.1 provides monthly capacity factors for each of the two units at the Poplar River 
Power Station. In 1991 , the average capacity factors for Units No. 1 and 2 were 88.7% 
and 86.2%. The capacity is based on the maximum rating of 297.8 MW/h for unit No. 1 
and 294 MW/h for Unit No. 2. Figure 2.1 illustrates a historical view of gross MW/h for 
each unit from 1981. 



Table 2.1 1991 Monthly Capacity Factors, Poplar River Power Station. 





CAPACITY FACTOR (%) 


MONTH 


UNIT NO. 1 


UNIT NO. 2 


January 


100.5 


90.1 


February 


101.0 


99.6 


March 


95.8 


99.4 


April 


61.1 


87.7 


May 


83.7 


34.9 


June 


91.3. 


89.0 


July 


73.4 


75.4 


August 


86.7 


90.7 


September 


94.2 


93.2 


October 


79.5 


99.7 


November 


97.4 


76.5 


December 


100.7 


99.5 


1991 Average 


88.7 


86.2 


1 990 Average 


88.1 


88.4 


1989 Average 


93.9 


93.3 


1 988 Average 


79.6 


96.2 


1 987 Average 


92.9 


75.3 


1986 Average 


76.8 


76.3 


1 985 Average 


89.0 


87.0 


1984 Average 


79.0 


82.0 



2.5 






























2.4 








2.5 


•2. -42. -4 








..... 






2.3Z..J 














2.3Z.J Z.J 1 






2.12.1 






1 






2.1 






1 


1 


TETRAWATT HOURS 
en fsj 


2 








2 2 








1 




1 


1.1 


i.y 




= 




i.y 




00 1 
CO 

o 

0.5 




= 




u.u 




PR 1 Qro88 TWh Unit 1 in Sarvic* 1983 - July 
E PR 2 Groea IWh Unit 2 In S«rvic« 1981 - Jun» 





1 










^^ 




1 












1 










g 



1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 

Figure 2.1 Production History 1981 - 1991, Poplar River Power Station. 

Monthly coal consumption and gross MW/h production is summarized in Table 2.2. Oil 
consumption is also provided, but monthly values represent both Unit No. 1 and Unit No. 
2 consumption. Yearly plant oil and coal usage from 1981 to 1991 are illustrated in 
Figure 2.2. 

2.2 Construction 



There was only minor construction completed during 1991 . During the summer a pump 
pad was built in the north west corner of Ash Lagoon No. 3 North. This pump pad allows 
the pumps that transfer water from Ash Lagoon No. 3 to Ash Lagoon No. 2 to be raised 



Table 2.2 1991 Monthly Gross MW/h and Fuel Consumption, 
Poplar River Power Station. 





UNIT NUMBER 1 


UNIT NUMBER 2 




Month 


Gross 

MW/h 


Coal 

Consumption 

(Mg) 


Gross 
MW/h 


Coal 

Consumption 

(Mg) 


PR1/PR2 Oil 
(m') 


January 


222 700 


184 841 


197 000 


163 510 


140 


February 


202 100 


169 764 


196 700 


165 228 


102 


March 


212 300 


178 332 


217 500 


182 700 


60 


April 


131 100 


110 209 


185 600 


156 155 


155 


May 


185 400 


155 736 


76 300 


64 092 


408 


June 


195 700 


164 388 


188 500 


158 340 


121 


July 


162 600 


137 083 


165 000 


139 109 


148 


August 


192 000 


161 280 


198 500 


166 740 


214 


September 


202 000 


170 917 


197 300 


166 711 


42 


October 


176 100 


147 924 


218 000 


183 120 


29 


November 


208 900 


192 075 


161 900 


152 595 


360 


December 


223 200 


187 488 


217 700 


182 868 


44 


1991 


2 314 100 


1 960 037 


2 220 000 


1 881 168 


1 823 




1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 

Figure 2.2 Fuel Consumption 1981 - 1991, Poplar River Power Station. 



7 
about 3 metres, this in turn allows higher operating levels for Ash Lagoon No. 3 North. 
The pump pad was constructed by adding material to the dyke, no portion of the dyke 
was excavated. 

Historically, surface flow from the switch yard, located north of the Poplar River Power 
Station, flowed north unobstructed to Cookson Reservoir. In the last quarter of 1991 , the 
drainage from this area was redirected south to the power station's surface water 
drainage system which is controlled by Scribner Dam. Advantages of this change include 
routine testing of water originating from the switch yard before release and more 
importantly, a means of containment in the case of oil leaks from a transformer. 

2.3 Unusual Events 

There were no reportable spills during 1991. 

2.4 LIFAC 

In 1989, SaskPower entered into a joint venture with Tampella Ltd. of Finland to build a 
demonstration unit for Tampella's LIFAC desulphurization process. The intent of the 
project is to allow SaskPower an opportunity to fully evaluate the technology for possible 
future applications while offering Tampella an opportunity to demonstrate the process to 
other potential customers. 



8 

The demonstration unit was added to Unit No. 1 at the Poplar River Power Station. 

Constnjction occurred during the first eight months of 1990 and the system was 
commissioned in September 1990. initial testing of the LIFAC process took place from 
late October 1990 to the first week of December 1990. 

Extensive testing of the LIFAC process took place in the first half of 1991, more 
specifically from Februarys, 1991 to April 19, 1991 and then from June 16, 1991 to July 
3, 1991. Following these periods there was very little LIFAC testing was done. There 
is no scheduled testing of LIFAC planned for 1992. 

2.5 Scribner Dam 

In July 1991, the "Release Management Procedure of Scribner Dam" was updated to 
include oil and grease testing. In addition to the routine testing for conductivity and pH, 
a visible check for oil and grease will be done and a sample will be taken for oil and 
grease analysis. Oil and grease analysis was added to make sure no petroleum-based 
products are added to the reservoir. 

In 1991, there were twelve releases from Scribner Dam as compared to only three in 
1990. This increase can largely be accounted for by the above average rains from April 
1991 to July 1991. In the last quarter of 1991 , excess water from a domestic well was 
directed to Scribner Dam and accounts for the releases during this time. Table 2.3 
provides a summary of the testing completed during 1991 for Scribner Dam. On each 
occasion, the contents were released to the reservoir. 



Table 2.3 Scribner Dam Testing - 1991, Poplar River Power Station. 





Date 
Sampled 


pH 
(units) 


Conductivity 
(ps/cm) 


Oil& 
Grease ^ 
Visible 


Oil & 
Grease ^ 

(mg/L) 


Date 
Released 


1. 


Jan. 29/91 


6.8 


420 


-- 


-- 


Jan. 29/91 


2. 


Feb. 05/91 


7.2 


370 


-- 


-- 


Feb. 05/91 


3. 


Apr. 03/91 


7.7 


750 


-- 


-- 


Apr. 03/91 


4. 


May 13/91 


7.3 


580 


-- 


-- 


May 13/91 


5. 


June 05/91 


7.7 


590 


-- 


-- 


June 05/91 


6. 


June 23/91 


8.3 


990 


-- 


-- 


June 23/91 


7. 


June 24/91 


8.1 


710 


- 


-- 


June 24/91 


8. 


June 29/91 


7.6 


448 


N.D. 


<0.1 


June 29/91 


9. 


July 02/91 


8.0 


725 


N.D. 


0.2 


July 02/91 


10. 


Aug. 09/91 


8.3 


1230 


N.D. 


<0.1 


Aug. 09/91 


11. 


Oct. 16/91 


8.6 


2480 


N.D. 


0.2 


Oct. 16/91 


12. 


Dec. 11/91 


8.7 


2100 


N.D. 


0.2 


Dec. 11/91 


N.D. No visible sign. 1 
II ' -Oil and grease visible, and oil and grease testing; started with) the June 29, 1991 release. [ 



10 
3.0 EAST POPLAR RIVER 

3.1 Streamflow 

Streamflow in the Poplar River basin was below normal during 1991. The March to 
October recorded volume of the Poplar River at the International Boundary, an indicator 
of natural flow in the basin, was 3 720 cubic decameters (dam^) or 37% of the 1931 to 

1990 median seasonal flow. For the fifth consecutive year, the flow has been below 
normal which is indicative of the prolonged drought in the great plains. A comparison of 

1991 with the 1961-90 median flow is shown in Figure 3.1. 

The recorded volume for the East Poplar River at the International Boundary was 2 110 
dam^ in 1991. This volume is 61% of the median annual flow since the completion of 
Morrison Dam in 1975. 

3.2 Apportionment 

In 1976 the International Souris-Red Rivers Engineering Board, through its Poplar River 
Task Force, completed an investigation and made a recommendation to the governments 
of Canada and the United States regarding the apportionment of waters in the Poplar 
River basin. Although Canada and the United States have not officially adopted the 
Apportionment Recommendation, the Poplar River Bilateral Monitoring Committee has 
adhered to the recommendation in each of its annual reports. Annex 4 contains the 
apportionment recommendation. 



11 



1.000 



0.000 



MAR 



— MEDIAN OF MONTHLY MEAN DISCHARGE FOR 1 961 -1 990 

— MONTHLY MEAN DISCHARGE FOR 1991 




-4> 



APR 



MAY 



JUN 



JUL 



AUG 



SEP 



OCT 



Figure 3.1 Discharge During 1991 Compared with the l\/ledian Discharge for 
1961-1990 for the Poplar River at the International Boundary. 



3.3 Minimum Flows 



The recorded volume of the Poplar River at the International Boundary from March 1 to 
May 31 , 1991 was 2 740 dam^ Based on the IJC recommendations and the assumption 
that the recorded flow is the natural flow, the United States entitlement is a minimum 
discharge on the East Poplar River of 0.028 m^/s for the period June 1 , 1 991 to May 31 , 
1992. The minimum flow for the period January 1 to May 31 , 1991 had previously been 
determined on the basis of the Poplar River flow volume for March 1 to May 31 , 1990. 
A hydrograph of the East Poplar River at the International Boundary and the minimum 
flow as recommended by the IJC are shown in Figure 3.2. All dally flows during 1991 



12 



T 1 1 1 1 1 1 1 1 1 r 




JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 

1991 

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



were above the recommended minimum with the exception of January 1 . Icing as a 
result of extremely cold weather reduced the flow to 0.026 mVs on this day. 

3.4 On-Demand Release 



In addition to the minimum flow, the IJC apportionment recommendation entitles Montana 
to an on-demand release to be delivered during the 12 month period commencing June 
1 , 1991. Based on the runoff volume of the Middle Fork Poplar River during the March 
1 to May 31 , 1990 period, Montana was entitled to a release of 370 dam^ from Cookson 
Reservoir. Montana requested this release be delivered between May 1 and May 30, 
1991. A volume of 459 dam^ was delivered during this period. 



13 
3.5 Water Quality 

The 1981 report by the IJC to Governments recommended: 



For the March to October period, the maximum flow-weighted 
concentrations should not exceed 3.5 milligrams per litre (mg/L) for boron 
and 1500 mg/L for TDS for any three consecutive months in the East Poplar 
River at the International Boundary. For the fi/farch to October period, the long- 
term average of flow-weighted concentrations should be 2.5 mg/L or less for 
boron, and 1000 mg/L or less for TDS in the East Poplar River at the 
International Boundary. 



For the perfod prior to 1982, three-month moving flow-weighted concentrations 
(FWC) for boron and TDS were calculated solely from monthly monitoring results. Since 
the beginning of 1982, the USGS has monitored conductivity daily in the East Poplar 
River at the International Boundary, allowing estimates of daily boron and TDS 
concentration to be derived from regression relationships with conductivity. Thus, 
three-month FWCs for the period 1 982 to 1 988 have been calculated from both the 
results of monthly monitoring and the daily concentration estimates. 

The Bilateral Monitoring Committee adopted the approach that for the purpose of 
comparison with the proposed IJC long-term objectives, the boron and TDS data are best 
plotted as five-year moving FWCs which were advanced one month at a time. 

Beginning in 1988, FWCs were calculated from the five year period preceding each 
plotted point. Prior to 1988, long-term averages were calculated from a five year 
period in which 2.5 years preceded and 2.5 years followed each plotted point. For 



14 
example, the FWC for December 1 991 refers to the FWC of the period December 1 986 

to December 1991. It should be emphasized that the calculations have been based on 

the results of all samples collected for the three-month and five-year periods, and not 

restricted to samples collected during March to October. 

3.5.1 Total Dissolved Solids 

There is an inverse relationship between IDS and stream flow at the International 
Boundary station. During periods of high runoff, such as spring freshet, IDS drops as 
the proportion of stream flow derived ultimately from groundwater decreases. Conversely, 
during times of low stream flow (late summer, winter) the contribution of groundwater to 
stream flow is proportionally greater. Because the natural groundwater has a higher ionic 
strength than the surface water entering the river, the TDS of the stream increases 
mari<edly during low flow conditions. 

TDS grab sample data collected by Environment Canada and the USGS in 1991 are 
shown in Figure 3.3. TDS ranged from 866 mg/L (March 14) to 1144 mg/L (May 16). 
The proposed short-term objective for TDS is 1500 mg/L. A time plot of the three-month 
moving FWCs for TDS is presented in Figure 3.4. No exceedences of the objective have 
been observed during any three month period since 1975. The three-month FWCs 
remained confined within a narrow range centred around a mean of approximately 900 
mg/L during 1991. 



15 



m 

a 



l<iUU 


■ 


1 


r ■ 


r ' 1 


r 

• 


r 




r 


1 r 


r 


1 


■ 


1100 


- 






















- 


1000 
























•_ 




■ • 


• 




■ 




: 


• 






• 


• 




900 






• 










• 


• 








800 


- 






















- 


700 


- 


1 


1 




1 


i 




1 


1 1 


1 


L 


- 



1991 



D 1992 



Figure 3.3 TDS Concentrations for 1991 Grab Samples from East Poplar River at 
the International Boundary. 






CO 

Q 



1600 
1500 
1400 
1300 



Short-Term Objective (1500 mg/L) 




from sample analysis 
from regression 



1974 1976 1978 1980 1982 1984 1986 1988 1990 

1975 1977 1979 1981 1983 1985 1987 1989 1991 

Figure 3.4 Three-Month Moving, Flow- Weighted TDS Concentration for East Poplar 
River at the international Boundary. 



16 
Five-year FWCs for TDS (Figure 3.5) remained below tine long-term objective of 1000 
mg/L A 200 mg/L increase in the five-year FWCs which occurred in early 1988 was 
increased further in 1991 to approximately 950 mg/L. This corresponds to a decline in 
high spring flows over that period of time. A similar increase in TDS was seen during 
mid-1987, as a remnant of the 1982 discharge. Relatively low spring discharges have 
occurred since 1 984. If this trend continues, it is expected that FWCs will soon approach 
the 1 000 mg/L objective. 

Using the Seasonal Kendall Tau test for trend assessment, TDS showed a statistically 
significant increase from 1981 to 1991 (90% confidence level). The Seasonal Kendall 
Sen Slope estimates the approximate TDS increase to be 2.63 mg/L/year (Figure 3.6). 
This positive trend could be explained by the drought conditions that occurred over the 
later half of the data record. The TDS increase comes from salt buildup in the reservoir 
as a result of water being used for cooling. High evaporation of this water (as a result 
of drought conditions) causes salts to remain within the reservoir. In addition, low flow 
conditions (when flows are derived largely from groundwater sources) likely increase TDS 
concentrations and yields a positive TDS trend in the data. 

The relationship between TDS and conductivity generated from data collected from 1 975 
to 1991 is as follows: 

TDS = (0.640 X specific conductance) + 12.149 
(R2=0.87, n=422) 



o 



17 



1200 



1100 



900 



BOO - 



700 



600 



400 



' I ' I ' I ' I I 



I ' I ' I ' I ' I ' I ' I 



Long-Term Objective (.1000 mgA) 




,1.1,1,1.1 



■ I ■ I ■ 



I ■ I ■ I ' I ■ 



1974 1976 1978 1980 1982 1984 1986 1988 1990 

1975 1977 1979 1981 1983 1985 1987 1989 1991 



Figure 3.5 Five- Year Moving, Flow-Weigiited TDS Concentration for East Poplar 
River at the Internationai Boundary. 



1500 



CO 
Q 



1350 - 
1200 - 
1050 - 

900 

750 

800 - 

450 - 

300 

150 




•r 



•-.-\T 






Sen Slope Estimate (2.63 mg/L/year) 



1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 

Figure 3.6 Sen Slope Estimate for TDS at East Poplar River at the International 
Boundary. 



18 
3.5.2 Boron 

During 1 991 , boron concentrations in the East Poplar River at tine International Boundary 
varied from 1.63 mg/L (Nov. 14) to 2.1 mg/L (Jun. 18 and Dec. 18) (Figure 3.7). 

Three-month boron FWCs for the period of record are shown in Figure 3.8. The short 
term objective of 3.5 mg/L boron was not exceeded for the period 1975-1991. The 
similarity in shape between the TDS and boron plots (Figures 3.4 and 3.8) is a strong 
indication of the significance of discharge in FWC functions. 

The five-year boron FWCs, displayed in Figure 3.9, remained well below the long-term 
objective of 2.5 mg/L boron. From mid-1988 to the end of 1990, there was a slight 
increase in the five-year boron FWC. In first quarter of 1991 the five-year boron FWC 
increased to 1 .9 mg/L. As was the case with TDS, the five-year calculations for boron 
were significantly influenced by the relatively large discharge during 1985 and the low 
discharges in 1986. 

The relationship between boron and conductivity at the East Poplar River sampling 
location during the period 1975-1991 is described by the equation: 

boron = (0.00148 x specific conductance) - 0.256 
(R'=0.70, n=422) 

As shown in Figure 3.10, boron levels undergo a statistically significant increase from 



19 



2.4 
2.2 - 
qB 2.0 



o 

O 1-8 



1.6 - 



1.4 



• •- 

• • • • - 

• - 



1991 F 



D 1992 



Figure 3.7 Boron Concentrations for 1991 Grab Samples from East Poplar River 
at the International Boundary. 



4.5 



4.0 



3.5 






c 
o 
t^ 
o 
m 



' I I I ' I 



' I I I ' I I I ' I 



Short-Term Objective (3.5 mg/L) 




from sample analysis 
from regression 



1974 1976 1978 1980 1982 1984 1986 1988 1990 

1975 1977 1979 1981 1983 1985 1987 1989 1991 

Figure 3.8 Three-Month Moving, Flow-Weighted Boron Concentration for East 
Poplar River at the International Boundary. 



20 



DO 

c 
o 
s^ 
o 
m 



-I — I I I ' — I ' I 



3.0 



2.6 



2.2 



1.8 



1.0 



0.2 ' ' ' ' ' 



Long-Term Objective (2.5 mg/L) 




I . I I I . I 



■ ' ■ I ■ I ■ I 



1974 1976 1978 1980 1982 1984 1986 1988 1990 

1975 1977 1979 1981 1983 1985 1987 1989 1991 

Figure 3.9 Five- Year Moving, Flow Weighted Boron Concentration for East Poplar 
River at the International Boundary. 



^ 



a 
o 

Si 

o 

03 



3.5 



3.0 - 



2.5 



2.0 - 



1.5 - 



0.5 - 



0.0 



1 r 




n 1 \ 1 1 r 1 1 


• \ "•.: 


_-,! 


^v:v:i.l::--^r-::r----::"'7""*'''-"^'^" 


y 


.« 


Sen Slope Estimate (0.0250 mgA/year) 


1 


• 


1 1 1 1 1 1 1 1 



1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 



Figure 3.10 Sen Slope Estimate for Boron at East Poplar River at the International 
Boundary. 



21 
1 981 to 1 991 (90% confidence level). The boron Increase, as calculated by the Seasonal 

Kendall Sen Slope Estimate, is approximately 0.0250 mg/Uyear. As with TDS, this trend 

may be explained by the drought conditions in addition to consumptive use of water for 

cooling and natural evaporation from Cookson Reservoir. 

3.5.3 Other Water Quality Variables 

Table 3.1 contains the multipurpose water quality objectives for the East Poplar River at 
the International Boundary, recommended by the International Poplar River Water Quality 
Board to the IJC. One exceedence of the multipurpose objectives occurred in 1 991 . The 
4.0 mg/L objective for dissolved oxygen was exceeded for an Environment Canada 
sample collected on January 15, 1991 (2.5 mg/L). It is believed that the extensive ice 
cover coupled with low flow conditions drastically inhibited the aeration process. 

Environment Canada monitored the East Poplar River for phenoxyacid herbicides and 
organochlorine compounds during 1991. Trace concentrations of 2,4-D (in two of nine 
samples), gamma-BHC (in one of nine samples), alpha-BHC (in three of nine samples), 
and Dicamba (in one of nine samples) were recorded. The presence of these compounds 
in prairie surface waters is well documented (Integrated Environments Ltd., 1991). All 
other organic compounds monitored were below analytical detection limits. 



22 



Table 3.1 Recommended Water Quality Objectives and Excursions, 1991 

Sampling Program, East Poplar River at the International Boundary 
(units in mg/L except as otherwise noted). 



Parameter 


Objective 


No. of Samples 


Excursions 


USA 


Canada 


Objectives recommended by IJC to Governments || 


Boron-total 


3.5/2.5 (1) 


8 


9 


Nil 


Total Dissolved Solids 


1500/1000(1) 


8 


9 


Nil 


Objectives recommended by Poplar River Board to IJC 


Aluminum-dissolved 


0.1 


4 


9 


Nil 


Ammonia un-ionized (as N) 


0.2 


8 


9 


Nil 


Cadmium-total 


0.0012 


1 


9 


Nil 


Chromium-total 


0.05 


2 


9 


Nil 


Copper-dissolved 


0.005 


2 




Nil 


Copper-total 


1.0 


3 


9 


Nil 


Fluoride-dissolved 


1.5 


8 


9 


Nil 


Lead-total 


0.03 


3 


9 


Nil 


II Mercury-dissolved 


0.0002 




- 


Nil 


1 Mercury-whole fish (mg Hg/Kg) 


0.5 


- 


78 


Nil 


Nitrate (as N) 


10.0 


8 


9 


Nil 


Oxygen-dissolved 


4.0/5.0 (2) 


8 


7 


1 


Sodium adsorption ratio 


10.0 


8 


9 


Nil 


Sulphate-dissolved 


800.0 


8 


9 


Nil 


Zinc-total 


0.03 


2 


9 


Nil 


Water Temperature (Celsius) 


30.0 (3) 


8 


7 


Nil 


pH (pH Units) 


6.5 (4) 


8 


9 


Nil 


Coliform-fecal (no. per 1 00 mL) 


2,000 


- 


9 


Nil 


Coliform-total (no. per 1 00 mL) 


20,000 


- 


9 


Nil 


1 . Five-year average of flow-weighted concentrations (March to October) should be <2.5 boron and <1 ,000 
TDS. Three-month average of flow-weighted concentrations should be <3.5 boron and <1 ,500 TDS. 

2. 5.0 (minimum April 10 to May 15), 4.0 (minimum remainder of year). 

3. Natural temperature (April 10 to May 15), <30 degrees Celsius (remainder of year). 

4. Less than 0.5 pH units above natural, minimum pH = 6.5. 



23 



3.6 Quality Control 



3.6.1 Streamflow 



To test the quality of streamflow calculations made by the United States Geological 
Survey and Environment Canada, similar measurements were made on the East Poplar 
at the International Boundary on May 30, 1991, by personnel from both agencies. The 
discharges, as shown in Table 3.2, are within measurement error. 



Table 3.2 Streamflow Measurement Results for May 30, 1991, 



Agency 


Time 
(CST) 


Width 
(m) 


l\/lean 
Area 


Velocity 
(m/s) 


Gauge 
Height 
(m) 


Discharge 
(m'/s) 


EC 


11:00 


6.00 


0.707 


0.245 


1.692 


0.173 


USGS 


9:05 


6.70 


0.771 


0.223 


1.689 


0.172 


Notes: 

1 . Measurement section is the GEOWEB measuring section. 

2. USGS values have been converted from Imperial units. 



3.6.2 Water Quality 



Quality control sampling was carried out for water quality at the East Poplar River at the 
International Boundary on June 18, 1991. Participating agencies included the United 
States Geological Survey, Environment Canada, Saskatchewan Environment and Public 



24 

Safety and SaskPower. 

Sets of triplicate samples were split from USGS sampling churns and submitted to the 
respective agency laboratories for analyses. Field procedures were identical to those 
used since 1986. 

Most parameters showed good reproducibility. Results for total Kjeldahl nitrogen, 
dissolved iron and total molybdenum are not comparable. For total phosphoms, TDS and 
total chromium, one set of results is noticeably high compared to the other reported sets. 
Similarly, one of the reported data sets is low for silica and dissolved aluminum. The 
results reported by one agency for magnesium showed unacceptable variability. The 
USGS and Saskatchewan Environment and Public Safety's relatively high detection limits 
for nitrate/nitrite make it difficult to evaluate the results for these parameters. 

Environment Canada has completed a detailed evaluation of all of the available data from 
past quality control exercises. 



25 
4.0 SUPPLEMENTARY WATER SUPPLY (OLD COAL MINE DEWATERING) 

4.1 Operations 

Since January 1, 1990, SaskPower has been operating the old Prairie Coal mine 
dewatering network for the purpose of using groundwater to supplement surface flows into 
Cookson Reservoir. Since taking over the network, SaskPower has undertaken a 
significant amount of work in the area. This work includes: repair, closing or 
abandonment of existing wells, accurate quantification of pumping rates, replacement of 
damaged piezometers, a hydrogeological evaluation of the East Poplar River basin and 
a numerical model. 

In 1991, a total of 21 wells were in operating status, 5 were closed and 20 were 
abandoned. The wells that have been closed can still be made available for future use 
if the need arises. Welte that were on private land, but were scheduled for abandonment, 
were initially offered to the landowner for their private use. Two of these wells were taken 
over by the landowner and the remainder were abandoned. 

4.2 Pumpaqe Volumes 

A summary of monthly pumpages is shown in Table 4.1 



26 



Table 4.1 Supplementary Supply Monthly Pumpages. 



MONTH 


PUMPAGE 
(dam') 


PUMPAGE 
(acre/feet) 


January 


500 


405 


February 


449 


364 


March 


517 


419 


April 


512 


415 


May 


530 


430 


June 


528 


428 


July 


248 


201 


August 


212 


172 


September 


505 


410 


October 


527 


427 


November 


492 


399 


December 


494 


400 


TOTAL 


5514 


4472 



4.3 Groundwater Levels 



4.3.1 Saskatchewan 



Figure 4.1 illustrates the drawdowns resulting from pumping for the supplementary supply. 
It is interesting to note that there have been minor increases in drawdown in the southern 
part of Township 1 , Range 27, West of the Second Meridian, which is immediately along 
the International Boundary. Currently the 1 -metre drawdown is interpreted as being 



27 

















a. 

E- 


CL 


















8 


^ 


„ 


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s s 


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W 




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S 


: 


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28 

approximately one kilometre from the boundary. However, the majority of the expansion 

of the cone of depression has been to the northwest in the area of Fife Lake. Typically 
water levels have dropped 0.1 m to 0.3 m. Given the dry conditions in the area and the 
small magnitude of drawdowns, it is difficult to isolate man induced changes from natural 
changes. 

The groundwater investigation and modelling undertaken by SaskPower have been 
completed. As the results of the report are being reviewed by Sask Water (formerly 
Saskatchewan Water Corporation), it would be premature to discuss the findings of the 
report. 

4.3.2 Montana 

Hydrographs reflecting water level measurements for selected wells in the Hart coal seam 
are presented in Figure 4.2. These wells continue to show trends of decline in water 
levels although these trends have levelled-off in 1991. 

Water levels for wells 2, 8, 9, 11, and 21 continue to show no trends in water level 
change. 



29 



2455 



2454 



E 2453 



<3 2452 



5 2451 




-1 1- 

-79 Jan-81 Jan-83 Jan-85 Jan-87 Jan-89 Jan-91 Jon- 



Figure 4.2 Hydrographs for Selected Wells, 1979 to 1991. 



4.4 Groundwater Quality 



4.4.1 Saskatchewan 



The water quality from the discharge points has been consistent with no trends indicated. 
A summary of the more frequently tested parameters during 1991 is provided in Table 
4.2. Included in this table are the average and standard deviation of the results from 
January 1 990 to December 1 991 . TDS and boron results for several discharge points are 
illustrated in Figures 4.2 and 4.3 for 1990 and 1991 to show the consistent results of the 
pumpwell analysis. 



30 



Table 4.2 Poplar River Power Station, Supplementary Water Supply Project to 
Cookson Reservoir Discharge Pipe Average Analysis - 1991. 





Summary of 1990 and 1991 
Data 






1991 Average 


Average 


Standard 
Deviation 


Girard Creel( 
Location "03" 
1991 Average 


pH (units) 


7.4 


7.6 


0.4 


7.8 


Conductivity 
(us/cm) 


1 385 


1 384 


202 


1220 


Total Dissolved 
Solids 


905 


894 


132 


804 


Total Suspended 
Solids 


2.4 


4.2 


7.0 


17.2 


Boron 


1.21 


1.22 


0.27 


1.17 


Sodium 


177 


178 


34 


158 


Cyanide 


<2 


<2 





<2 


Iron 


1.3 


1.2 


0.7 


0.7 


Manganese 


0.22 


0.23 


0.11 


0.15 


Mercury 


<0.1 


<0.10 





<o.i 1 


1 - All units mg/L unless othenwise noted. | 



Included in Figures 4.3 and 4.4 are the results from Girard Creek Location "C". This 
location is directly downstream from the rnajority of pumpwells and provides a good 
indication of water quality going to the reservoir. Water quality at "C" is much better than 
the reservoir quality and therefore this water has a positive influence on the reservoir 
water quality. 



31 



-rOTA.l_ DISSOLVED SOLIDS (mg/l) 



1 ./'SO 




IVI IV/1 J 

SO 

DOS — t— D09 



S N J IVI IVl J S 

D1 8 — <3lll=J/\F=JD OFREEK "CO" 



Figure 4.3 TDS for Selected Discharge Points, 1990 and 1991. 



BORON Cmg/I) 




JIVIIVIJ SNJIVIIS/IJ S 

90 I 91 

— DOS — t— DOS -»*- D1 8 -"- C3ll=l/\.F=ID CSFIEEK "Ci3 



N 



Figure 4.4 Boron for Selected Discharge Points, 1990 and 1991. 



32 



4.4.2 Montana 



Sampling for water quality was performed on wells 5-11, 15, 16 and 1 9 in 1 991 . A graph 
of TDS versus time, for selected wells, is presented in Figure 4.5. There continues to be 
no significant changes in water quality. 



1200 




200 



Jan-79 Jan-81 Jan-83 Jan-85 Jan-87 Jan-89 Jan-91 Jon-93 

Date 

Figure 4.5 TDS for Selected Wells In the Hart Seam. 



33 
5.0 SOIL SALINITY PROJECT BELOW MORRISION DAM 

5.1 Operations 

Since September 1989, SaskPower has been operating a network of dewatering wells 
below Cookson Reservoir. The purpose of these wells is to lower the water table below 
the dam in an attempt to reduce salinity. At the present time the majority of the pumpage 
has come from four wells, with minor contributions from two additional wells. 

5.2 Pumpage Volumes 

Table 5.1 summarizes monthly pumpages for the salinity project. Table 5.2 summarizes 
the pumpage volumes for individual salinity project wells. The 1991 pumped volume of 
947 dam' represents an increase of 181 dam' over 1990 volumes. This increase in total 
pumpage is due to an influx of 206 dam' from well PW 90108, which is located on the 
west side of the Poplar River. On the east side of the river, production from 87,102 
decreased by 30 dam'. 



34 



Table 5.1 Salinity Project, Monthly Pumpages. 



MONTH 


PUMPAGE 
(dam^) 


PUMPAGE 
(acre/feet) 


January 


103 


84 


February 


72 


58 


March 


86 


70 


April 


81 


66 


May 


54 


44 


June 


62 


50 


July 


66 


53 


August 


86 


70 


September 


78 


63 


October 


72 


58 


November 


86 


70 


December 


101 


82 


TOTAL 


947 


768 



Table 5.2 Individual Salinity Project Wells, Pumpage Volumes. 



WELL 


ANNUAL PUMPAGE 
(dam') 


ANNUAL PUMPAGE 
(acre/feet) 


PW 87102 


49.0 


39.6 


PW 87103 


233.0 


188.6 


PW 87104 


389.0 


315.0 


PW 90106 


15.0 


12.2 


PW 90107 


1.0 


0.8 


PW 90108 


260.0 


210.5 


* PW 87105 and PW 90109 not operating | 



35 
5.3 Groundwater Levels 

5.3.1 Saskatchewan 

Drawdowns for the salinity project are similar to those for the year 1 990. Small changes 
in pumping patterns resulted in a slight decrease in drawdown on the east side of the 
river and a slight westward expansion of the cone of depression. 

5.3.2 Montana 

In 1990, two wells were installed to monitor effects of pumping the alluvial aquifers along 
the East Fork of Poplar River for salinity control. An attempt was made to install wells, 
one on each side of the East Fork of the Poplar River in the alluvium, but work on well 
(23) on the east side could not be completed. 

Water levels in well 24 are approximately one metre below the land surface and show a 
decline of approximately fifteen centimetres for 1991. 



36 
5.4 Groundwater Quality 

5.4.1 Saskatchewan 

As a general statement, the water quality of the common discharge point from the salinity 
wells is better than the water quality of the reservoir. Average results from the common 
discharge point for 1991 are provided in Table 5.3 along with a summary of the results 
for 1 990 and 1 991 . Results for boron and TDS were consistent in 1 990 and 1 991 (Figure 
5.1). 



1 ,750 




Figure 5.1 Water Quality Data from Discharge Pipe Location, 
South of Morrison Dam, 1990 and 1991. 



37 



Table 5.3 Poplar River Power Station, Salinity Project South of Morrison Dam 
Water Quality from Discharge Pipe Location - 1991. 





Summary of 1990 and 1991 
Data 






1991 
Average 


Average 


Standard 
Deviation 


Reservoir 
1991 Average 


pH (units) 


7.6 


7.5 


0.4 


8.7 


Conductivity 

(us/cm) 


1471 


1497 


99 


1901 


Total Dissolved 
Solids 


961 


982 


65 


1249 


Boron 


1.53 


1.49 


0.13 


2.26 


Calcium 


126 


119 


33 


21 


Magnesium 


60 


60 


6.5 


84.4 


Sodium 


148 


144 


4.5 


330 


Potassium 


7.2 


7.3 


0.5 


24.6 


Arsenic (ng/L) 


11.9 


11.9 


1.3 


7.4 


Aluminum 


<0.010 


<0.01 





0.207 


Barium 


0.025 


0.023 


0.007 


0.087 


Cadmium 


<0.001 


<0.001 





0.001 


Iron 


3.52 


3.61 


1.62 


0.44 


Manganese 


0.62 


0.42 


1.16 


0.02 


Molybdenum 


0.005 


0.003 


0.004 


0.005 


Strontium 


1.89 


1.72 


0.33 


0.610 


Vanadium 


0.003 


0.003 


0.004 


0.007 


Uranium (^g/L) 


<0.1 


<0.1 





— 


Mercury (|ig/L) 


<0.1 


0.11 


0.02 


0.10 


Sulphate 


322 


336 


31 


405 


* All concentrations are mg/L unless otherwise noted. 



38 
5.4.2 Montana 

Sampling of wells 23 and 24 for water quality was initiated in September of 1991. The 
TDS was 628 mg/L for well 24 and 2600 mg/L for well 23. Alluvial wells have TDS values 
that are about 600 mg/L while glacial till wells have values that are about 2600 mg/L. 



39 



6.0 COOKSON RESERVOIR 



6.1 Storage 

On January 1 , 1 991 , Cookson Reservoir storage was 23 300 dam^ or only 54% of the full- 
supply volume. During the year, precipitation was below normal resulting in below normal 
inflows. Reservoir contents reached a maximum of 26 700 dam^ on July 6. Elevations 
and corresponding volumes for several dates are shown in Table 6.1. In addition to 
runoff, reservoir volumes were supported and maintained by ground water pumping. 
Wells in the abandoned west block mine site supplied 5 700 dam^ to Girard Creek; 
approximately one half of this volume was estimated to have reached Cookson Reservoir. 
Wells in the soil salinity project area supplied 947 dam^ directly to the reservoir. 



Table 6.1 Cookson Reservoir Storage Statistics for 1991. 



1 Date 


Elevation (m) 


Contents (dam') 


1 January 1 


749.891 


23 300 


July 6 (maximum) 


750.528 


26 700 


October 29 (minimum) 


749.869 


23 100 


December 31 


749.941 


23 200 1 


Full-Supply Level 


753.000 


43 400 



40 

The Poplar River Power Station is dependent on water from Cool<son Reservoir for 

cooling. Power plant operation is adversely affected when reservoir levels drop below 
749 metres. The dead storage level for cooling water used in the generation process is 
745 metres. The 1991 recorded levels and associated operating levels are shown In 
Figure 6.1. As indicated in Figure 6.1, 1991 reservoir levels are below ten-year median 
levels. 



_, 756 

Zj 754 
i$ 7S3 
7S2 



(/) 



> 751 



CO 749 

UJ 

aC 748 

^ 747 

Z 746 

-£ 74S 

Q 744 

^ 743 

3 742 

^ 741 



y Full Supply Level 



"VMi 



nimum Desired Operating Level 



''Unusable Storage Level 



MEAN DAILY WATER LEVEL FOR 1 991 



— MEDIAN OF MONTHLY MEAN ELEVATION FOR 1 981 -1 990 



JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 

1991 



71500 




56500 






(n 


51900 


UJ 




a: 


42400 


t— 




LiJ 


3S900 


2 

6 


20400 




UJ 


23800 


Q 




f •> 


19100 


m 


14900 


Z3 




<_> 


11400 


Z 


8340 


(/i 


5860 


^ 




1 1 1 


3780 


1— 




7^ 


2000 


O 




f •> 


550 










Figure 6.1 Cookson Reservoir l\/lean Daily Water Levels for 1991 
and Median IVIonthly Water Levels for 1981-1990. 



41 
6.2 Water Quality 

Inflow to the reservoir originates from two sources, GIrard Creek and the East Poplar 
River North. The Girard Creek sampling point is located at the Coronach Reservoir 
overflow (PFRA dam). This inflow location shows strong seasonal fluctuations with no 
trends evident in water quality. Normally, water flows by this sample point year round as 
the majority of the water originates from the supplementary pumpwells described in 
Chapter 4.0 of this report. 

The reservoir monitoring sites include the Highway No. 36 location and the Cookson 
Reservoir at Morrison Dam location. Strong seasonal fluctuations are evident for the 
upstream Highway No. 36 location. Less seasonal variation was observed for the 
reservoir at the Morrison Dam location due to the large volume of water involved. 

The net effect of little spring runoff over the last several years has been a decrease in 
reservoir water quality. Figures 6.2 to 6.8 show the decreasing water volume of the 
reservoir and the increasing concentration of boron, sulphate, sodium, chloride, TDS, 
manganese, and strontium. The deterioration in water quality will continue unless there 
is an above average runoff in the spring of 1992. 



42 



50 



^ 40 



^ 30 

CD 



LU 

?20 



Q 10 



FULL SUPPLY VOLUME 




3.0 



2.5 



2.0 






RESERVOIR-B 



•a- ^'. 

' / i' 



E 



1.5 



1 .0 



o 
o 

CO 



0.5 



0.0 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 6.2 Cookson Reservoir Water Quality Data for Boron, 1983 to 1991. 




MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 



Figure 6.3 Cookson Reservoir Water Quality Data for Sulphate, 1983 to 1991. 



43 




— ,400 



300 



200 



Q 

o 



100 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 6.4 Cookson Reservoir Water Quality Data for Sodium, 1983 to 1991. 




MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 



Figure 6.5 Cool<son Reservoir Water Quality Data for Cliloride, 1983 to 1991. 



44 



CO 

LU 



50 



40 



y 30 



o 

CD 

o 



^ 20 



o 10 



FULL SUPPLY VOLUME jU\ ^ 

A^-fi 







RESERVOIR-TDS RESERVOIR VOLUME 



1,400 
1,200 _ 
1,000 f 

Q 

800 w 

Q 
LU 

600 § 



400 



200 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 6.6 Cookson Reservoir Water Quality Data for TDS, 1983 to 1991. 



o 



50 



CO 


40 


cc 




111 




1— 




LU 




S 




o 


30 


CD 




O 




O 




CO 




LU 




C3 


20 



O 10 



FULL SUPPLY VOLUME 
RESERVOIR VOLUME 




■*■ 



RESERVOIR-Mn 
9K- • • 



■m 



3K' 



*:: 



m 



^ ^i • : JL^ ■■■'^ :^ * 



• }«•.■ 



••)!( 



0.12 

0.1 

0.08 



0.14 



e 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 



0.06 < 



0.04 
0.02 




Figure 6.7 Cookson Reservoir Water Quality Data for Manganese, 1983 to 1991. 



45 



1.0 



1 .0 




'MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 | 89 | 90 | 91 

Figure 6.8 Cookson Reservoir Water Quality Data for Strontium and Fluoride, 
1983 to 1991. 



Reservoir outflow is monitored at the culvert immediately below the Cookson Reservoir 
on the East Poplar River. The primary sources of the outflow location are dam seepage 
and riparian leakage. Seasonal trends are noted for this location during periods of water 
release from the dam. Historically the water quality at this location has been poorer than 
that of the reservoir but is now of better quality. The quality at this location has not 
improved but the reservoir quality has decreased. 



46 
6.3 Mercury in Cookson Fish 

Mercury levels in fish in the Cookson Reservoir have been measured on five occasions, 
In 1979, 1983 and 1991 by Environment Canada (Water Quality Branch 1980, Munro 
1985, Shaw 1991, in prep) and in 1980 (Waite et al.) and 1984 by Saskatchewan 
Environment and Public Safety. Samples were collected to assess the safety of the fish 
in the reservoir for human consumption. These populations are confined to Cookson 
Reservoir and as such could only travel downstream as a result of a high runoff event. 
As suggested by Waite etaj. (1 980), based on observations from other reservoirs flooding 
throughout the world, high initial mercury levels in fish would be expected as a 
consequence of organic decay and methylation of sediment-borne metal. Elevated 
mercury concentrations in fish tissues would decline to pre-flooding background levels as 
organic matter was assimilated. 

Mercury concentrations in edible tissue of two size-classes of walleye ( Stizostedion 
vitreum) from 1979 to 1991 (Figure 6.9) followed the expected pattern. Mercury burden 
in edible tissue of smaller classes of walleye (25-35 cm) declined rapidly from a median 
concentration of 0.85 mg/Kg in 1979 to 0.29 mg/Kg in 1983. Likewise, the mercury 
concentration in larger fish (35-50 cm), while remaining higher than in the smaller fish, 
declined from 1 .32 mg/Kg in 1 979 to 0.42 mg/Kg in 1 984. Mercury concentration of white 
suckers (Catastomus commersoni) from Cookson reservoir was low (median 0.25-0.29 
mg/Kg Hg) and showed a slight but significant decline from 1979 to 1991 (Kruskal-Wallis 
2-sample test, p=0.61). 



47 



2.0 n 



9 




\ 


1.5 


9 




E 




*< 




e 




• 
c 


1.0 


o 




O 




>• 




^ 




3 




u 


0.5 






• 




S 





0.0 



Walleye 



25-35 cm 



1 




35-50 cm 

1 



o 

C=3 



White Sucker 

25-40 cm 



o 
* * 



$^^ 



T 1 1 1 1 1 1 1 1 \ \ 1 1 1 1 

Sampling Year 

Figure 6.9 Box and Whisker Plots of Tissue Mercury Concentrations in Fish from 
Cookson Reservoir from 1979 to 1991. Data from Water Quality Branch 
(1980), Waite et ai- (1980), Munro (1985) and Shaw (1991, in prep). 
Dashed horizontal indicates current Health and Welfare Canada 
consumption guideline of 0.5 mg/Kg Hg. 



Munro (1985) also reported on several species of 'forage fish' from the Cookson 
Reservoir, such as brassy minnow (Hybognathus hankinsoni) , Year-0 carp (Cvprinus 
carpio) and Year-0 white suckers. Mercury burden in these three fish species ranged 
from 0.03 to 0.25 mg/Kg. There have been no new measurements of mercury 
concentrations in these fish species since that study. 



48 
6.4 Morrison Dam Inspection 

On September 25, 1 991 a field inspection of Morrison Dam was conducted by SaskPower 
personnel. The entire exposed surface of the embankment and those uncovered parts 
of the stmcture were examined as well as the channel area immediately downstream of 
the dam. The pore pressure for the three instrumentation sections were also plotted and 
reviewed. 

The dam and spillways were found to be working satisfactorily and generally to be in 
good condition. A complete check of the spillway gates is recommended in the report 
and this wori< is scheduled to be completed in 1992. 



49 
7.0 ASH LAGOONS 

7.1 Operations 

Operations during 1991 were similar to the last several years. Ash Lagoon No. 1 was 
used during winter months and Ash Lagoon No. 3 North was utilized in the summer. Ash 
Lagoon No. 2 continues to be used as backup when the other two lagoons are not 
available. 

The total amount of ash that was deposited into the lagoons during 1991 is estimated at 
487 830 m^ An estimated 224 200 m^ of supply water was added during 1991. 

At the start of October 1991 , all ash was directed to Ash Lagoon No. 3 North. With the 
colder weather experienced in the last half of October 1991 , ash was redirected to Ash 
Lagoon No. 2, but pumping from No. 3 North continued to return as much water to the 
remaining lagoons as possible before freeze up. In the last week of November 1 991 , Ash 
Lagoon No. 1 was put into service and remained in service to the end of the year. 

7.2 Ash Lagoon Inspections 

Daily and monthly ash lagoon inspections were conducted. There was no sign of dyke 
misalignment or seepage. 



50 
An annual inspection to assess the condition of the ash lagoon dykes was conducted on 

October 03, 1991. The Inspection was conducted by Edward A. Wilson, P. Eng. 

representing Clifton Associates Ltd., of Regina, Saskatchewan. Mr. Wilson has been 

responsible for several annual inspections in the past and is familiar with the site. 

The conclusion of his report is that the lagoon dykes and liners have good integrity and 
the ash Is contained effectively. The lagoon system is performing as designed. The 
report restates the recommendations that were made in 1990 but had not yet been 
complied with: (i) the installation of additional monitoring piezometers, and (ii) the 
dredging of ash by the No. 2 outlet structure. SaskPower plans to complete the 
installation of the additional monitoring piezometers in the summer of 1992. Dredging by 
the No. 2 discharge structure is at this time not viewed as a critical issue and has not yet 
been scheduled. 

7.3 Dyke Stability 

There are three inclinometers located along the toe of Dyke "G" designated SI 101 , 102, 
and 103, respectively. On an annual basis, these inclinometers are measured and the 
results are compared to previous readings to determine possible movement over time. 
The measurements for this reporting period were completed June 19, 1991 . There was 
no indication of movement in any of the inclinometers. 

The 1982 Ash Lagoon Dyke Slope Stability Study, which was prepared by Clifton 



51 
Associates Limited and illustrated cross sections of the dykes, indicated a reduction in 

dyke stability. The water level is not exceeding the critical failure surface. A review of 

the hydrographs for October 1991 , on piezometers associated with these cross sections 

does not indicate an increasing trend that would suggest the critical failure surface line 

will be reached. 

7.4 Lagoon Water Levels 



Figure 7.1 illustrates operating levels for Ash Lagoon No. 1, Ash Lagoon No. 2, Ash 
Lagoon No. 3 North and the polishing pond for the period 1 983 to 1 991 . Freeboard limits 
were not exceeded during this reporting period for Ash Lagoon No. 2, Ash Lagoon No. 
3 North and the polishing pond. 
767 




753 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 7.1 Ash Lagoon Water Levels and Polishing Pond Level, 1983 to 1991. 



52 
7.5 Lagoon Seepage Estimates 

In 1990, SaskPower submitted tlie report entitled "Hydrogeological Evaluation - Ash 
Storage Lagoon" prepared by Clifton Associates Ltd., of Regina. A purpose of the report 
was to review the existing seepage calculations and recommend changes, if required, to 
the existing method or propose a new method that would increase the accuracy of the 
calculation. 

The existing method for estimating seepage was confirmed to be acceptable but adopting 
an updated method was recommended. Before an updated method can be adopted, it 
will be necessary to obtain additional piezometer level information from within the lagoon 
area. Installations of new piezometers are planned for the summer of 1992. The existing 
calculations will be used until newer methods of completing the seepage calculations are 
approved. In the last quarter of 1991 , comments of the report were received supporting 
the findings and recommendations of the report. 

Results of these 1991 seepage calculations are summarized in Table 7.1 along with the 
results of previous calculations from 1984. The total calculated seepage was determined 
to be 1 .267 L/s and is a large increase over the 1990 calculated value of 0.991 Us. This 
increase can mostly be attributed to the growth in calculated seepage rates for Ash 
Lagoon No. 3 North from 0.144 L/s in 1990 to 0.332 L/s in 1991. This was expected 
because of the elevated operating levels for Ash Lagoon No. 3 during 1991. This was 
the first year that ash was directed from both units to this lagoon for the entire summer. 



Table 7.1 Ash Lagoon Seepage Rates and Liner Permeabilities, 
Poplar River Power Station, October 1991. 



53 





Seepage Rate 




Liner 

Permeability 

(cm/s) 


Vertical 
(L/s) 


Horizontal 

(Us) 


Total 

(L/s) 


Polishing Pond | 


1984 Oct. 


8.13 X 10' 


0.055 


0.128 


0.183 


1985 Oct. 


8.70 X 10» 


0.064 


0.175 


0.239 


1986 Oct. 


10.8 X lO" 


0.062 


0.188 


0.250 


1987 Oct. 


14.4 X 10' 


0.078 


0.200 


0.278 


1988 Oct. 


28.7 X 10» 


0.087 


0.226 


0.313 


1989 Oct. 


20.6 X 10'» 


0.066 


0.214 


0.280 


1990 Oct. 


18.6 X 10' 


0.072 


0.206 


0.278 


1991 Oct. 


27.1 X 10' 


0.079 


0.222 


0.301 


Ash Lagoon No. 1 ' || 


1984 Oct. 


2.20 X 10' 


0.075 


0.068 


0.143 


1 985 Oct. 


3.66 X 10' 


0.085 


0.087 


0.172 


1986 Oct. 


1.95 X 10' 


0.083 


0.070 


0.153 


1987 Oct. 


2.36 X 10' 


0.092 


0.080 


0.172 


1988 Oct. 


4.00x10' 


0.121 


0.125 


0.246 


1989 Oct. 


2.88 X 10» 


0.135 


0.079 


0.214 


1990 Oct. 


3.00 X 10' 


0.160 


0.076 


0.236 


1991 Oct. 


2.16 X 10' 


0.165 


0.080 


0.245 


Ash Lagoon No. 2 | 


1984 Oct. 


3.8 X 10' 


0.116 


0.114 


0.230 


1985 Oct. 


9.22 X 1 0' 


0.189 


0.15 


0.339 


1986 Oct. 


10.5x10' 


0.199 


0.144 


0.343 


1987 Oct. 


11.0 X 10' 


0.219 


0.080 


0.299 


1988 Oct. 


16.0 X 10' 


0.236 


0.081 


0.317 


1 989 Oct. 


7.8 X 10' 


0.250 


0.073 


0.323 


1990 Oct. 


6.6 X 10' 


0.260 


0.073 


0.333 


1991 Oct. 


9.9 X 10' 


0.304 


0.085 


0.389 


Ash Lagoon No. 3 | 


1987 Oct. 


0.17 X 10' 


0.002 


0.0 


0.002 


1988 Oct. 


• 


0.022 


0.0 


0.022 


1989 Oct. 


11.8 X 10' 


0.030 


0.059 


0.089 


1990 Oct. 


23.6 X 10' 


0.042 


0.102 


0.144 


1991 Oct. 


18.5 X 10° 


0.095 


0.237 


0.332 


Total Seepage 


1984-0.556 (LVs) 

1985 -0.750 (L7s) 

1986 -0.746 (L/s) 
1987-0.751 (L/s) 


1988 -0.898 

1989 -0.906 

1990 -0.991 

1991 - 1.267 


(Us) 
(Us) 
(Us) 
(Us) 


' Permeability (xjuld not be calcul 


aXed (due to negative gratiients. 







54 

Total seepage rates and permeabilities of the liners are in the same order of magnitude 

as originally calculated by T.A. Prickitt. 

7.6 Lagoon Water Quality 

During the last two years, test results for many parameters have changed significantly 
with most sharing a common pattern of declining and then increasing. An investigation 
has not revealed a specific factor as to the cause of the changes but rather has indicated 
a series of events that may have influenced the changes. By the end of 1991, tests 
results were moving towards pre-1990 levels. 

The graphs contained in this section illustrate the results of thirteen parameters for the 
polishing pond from 1983 to 1991. On many of the graphs, polishing pond volume and 
pH have been added for reference. Figure 7.2 illustrates polishing pond conductivity and 
displays the overall general condition of the polishing pond from 1983 to 1991. 
Historically, there has been an inverse relationship between polishing pond conductivity 
and polishing pond volume. An increase in polishing pond levels resulting from the 
addition of supply or melt-water normally results in an improvement in water quality. 
From 1985 to 1988, conductivity was consistent at about the 3000 ^is/cm level. In mid- 
1988, conductivity increased as volumes within the lagoons decreased due to very high 
evaporation rates that year. Over the winter of 1990 and 1991, conductivity reached 

historic levels of 6000 |is/cm before decreasing sharply in early 1991 in response to 
supply water being added to the lagoon system. At the end of 1991, polishing pond 



55 

conductivity was around 3000 |is/cm. 

The levels of both vanadium and chromium have been in the 0.1 to 0.4 mg/L range. 
During the winter of 1990/91 , test results for both parameters decreased sharply below 
0.1 mg/L but have since increased to near previous levels. From 1 984 to 1 988, a modest 
increasing trend was noted for molybdenum with steady values of between 3.0 and 4.0 
mg/L for 1988 to 1990. From late 1990 to mid-1991 , values were declining but by the 
end of 1991 molybdenum results had returned to pre-1990 levels. 

Fluoride and sodium appear to have followed the same pattern as the other parameters 
during 1990 and 1991. From 1983 to 1989, fluoride results moved between the 5 and 
15 mg/L levels with the occasional spike to 25 mg/L. In early 1990, results dropped 
sharply and remained low to late 1991 when fluoride results started to move up. From 
1988, sodium results have remained stable at about 600 mg/L. In the second quarter of 
1991, sodium results dropped to 446 mg/L, but like fluoride, sodium results were 
increasing by the end of the year. The results for chromium, sodium, vanadium, fluoride 
and molybdenum do not appear to be strongly influenced by polishing pond water 
volumes. 

Sulphate results have historically moved between a wide range of 500 to 1500 mg/L. 
Contrary to what was observed for other parameters, there is a good relationship between 
sulphate results and polishing pond volumes. 



56 




1,000 



800 



600 -^ 



-- 400 



200 



M M M M 
83 I 84 I 85 I 86 



M M 
87 I 88 



M M 
89 I 90 



M 
91 



O 

> 



Figure 7.2 Lagoon Water Quality Data for Conductivity and Polishing Pond Volume, 
1983 to 1991. 



0.5 



0.1 







^ 



POLISHING POND-V 



1,000 



800 



600 -sr 



■ 400 



200 







M 
89 


M M 

1 90 1 91 



M M M M M M 

83 I 84 I 85 I 86 I 87 I 88 

Figure 7.3 Lagoon Water Quality Data for Vanadium and Polishing Pond Volume, 
1983 to 1991. 



57 



0.4 



0.3 



1 ,000 



C3) 

E 



0.2 



O 



o 



0.1 




600 -^ 



M M M M 
83 I 84 I 85 I 86 



M M M 
87 I 88 I 89 



M 
90 



M 
91 



J 

o 



Figure 7.4 Lagoon Water Quality Data for Chromium and Polishing Pond Volume, 
198310 1991. 





35 




30 


1 








y 




2E 


25 


■Z3 




■P-. 




LLI 




m 


20 


>- 




_l 




O 




^ 


15 


oS 




LU 




rr 


10 


O 





■POLISHING POND-F 
— POLISHING POND-VOLUME 
*<- POLISHING POND-Mo 




Q4^K^c»>»<-»»»>^-»r^ 



1,000 



800 



600 -ST 



400 



200 



MMMMMMMMM 
83 I 84 I 85 1 86 I 87 I 88 I 89 I 90 I 91 

Figure 7.5 Lagoon Water Quality Data for Fluoride, Molybdenum and Polishing 
Pond Volume, 1983 to 1991. 



58 

As shown in Figure 7.7, potassium results were increasing from 1983 to 1988. A large 

spike of 135 mg/L was observed in August 1988, followed by steady results of about 60 
mg/L to 1990. Like other test results, potassium levels dropped in early 1991 and by the 
end of the year had increased to previous levels. 

Strontium and uranium values have shown little change from 1988 levels. Uranium levels 

in the lagoons have rarely exceeded detection limits (less than 0.1 ng/L). Strontium 
values have been decreasing from 1988 and are now consistently below 0.5 mg/L. 

Figure 7.9 to Figure 7.1 1 illustrate calcium and magnesium results compared to changing 
polishing pond volume and pH results. There is an apparent softening trend of the 
lagoons from 1988. From 1989, magnesium levels have consistently been below 1 mg/L 
compared to 5 to 25 mg/L from 1983 to 1988. Calcium levels are also lower after 1988 
and exhibit a much wider range of fluctuations than previously seen. In February 1991 , 
calcium concentration was 236 mg/L but in May had dropped to 2.7 mg/L. Polishing pond 
volumes have likely influenced results for both calcium and magnesium. Solubilities of 
magnesium may be linked to elevated pH (over 10). However, high pH levels poorly 
explain calcium results. 

One of the most interesting trends has been the sudden decrease in boron results from 
1990. Historically, boron results were increasing from 1983 to 1985. This was expected 
as boron concentration reached solubility limits. From 1985 to 1990, boron 
concentrations moved within an established range of between 70 and 90 mg/L. 



59 



< 

Q- 



co 

e8 



Q 
O 
CO 



2,000 



1,500 



1,000 



500 



POLISHING POND - S04 




POLISHING POND - Na 



1 ,000 



800 



600 -sr 



400 



200 



MMMMMMMMM 
83| 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 7.6 Lagoon Water Quality Data for Sodium, Sulphate and 
Polishing Pond Volume, 1983 to 1991. 



140 



_ 120 

E 

:r 100 



80 



o 



CO 

oa 60 



CO 
CO 



40 



20 




POLISHING POND-K 
POLISHING POND-Sr 



1,000 



800 



600 -^ 



400 



200 



M M M M 

83 I 84 I 85 I 86 



M M M M M 

87 I 88 I 89 I 90 I 91 



Figure 7.7 Lagoon Water Quality Data for Potassium, Strontium and 
Polishing Pond Volume, 1983 to 1991. 



60 




1,000 



800 



600 -^ 



400 



200 



MMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 



M 
91 



O 



Figure 7.8 Lagoon Water Quality Data for Uranium and Polishing Pond Volume, 
1983 to 1991. 



400 



300 



t 






200 



100 



POLISHING POND-Ca 



1,000 




M M M 

83 I 84 I 85 



M M M 

86 I 87 I 88 



M M M 

89 I 90 I 91 



Figure 7.9 Lagoon Water Quality Data for Calcium and Polishing Pond Volume, 
1983 to 1991. 



61 




MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 7.10 Lagoon Water Quality Data for Calcium and Polishing Pond pH, 
1983 to 1991. 



35 




>^iK'Ml lf^.'^7 



14 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 7.11 Lagoon Water Quality Data for Magnesium and Polishing Pond pH, 
1983 to 1991. 



62 

Boron results moved opposite to polishing pond water levels (Figure 7.12) and by the end 

of 1990, boron had decreased dramatically to 20 mg/L. 

Discussion presented in 1990, suggested the sudden decrease in boron during 1990 
could be explained by the pH of the lagoons. With a pH greater than 10.0, boron 
solubility drops rapidly as shown in Figure 7.13. Information collected in 1991 still 
supports this suggestion. In May 1 991 , the polishing pond pH was over 1 1 .8, while at the 
same time the boron level was near a historic low of 3.61 mg/L. By mid-1991 , pH levels 
in the lagoon had dropped and boron levels were increasing. At the end of 1991 , the pH 
in the polishing pond had decreased to 10.1 while the boron level was 18.1 mg/L. 

One possible influence of the unusual trends seen during 1990 and 1991 , is the different 
operating conditions seen at this time compared to other years. SaskPower has been 
experimenting with a limestone (CaCOa) injection system called "LIFAC" to help reduce 
sulphur dioxide emissions. Testing of the system started in the last quarter of 1990 and 
lasted to the end of June 1991. It was during this time that a lot of the unusual results 
were seen. The chemistry of the polishing pond was known to be changing. The scaling 
potential of the ash water had suddenly increased and this was confirmed as the ash 
recirculating pumps had to be cleaned of scale regularly. 

Another factor influencing lagoon water quality in 1991 was the addition in March and 
April of approximately 224 200 m' of supply water. This had a positive influence on water 
quality. 



63 



120 
100 
80 
60 
40 
20 




POLISHING POND-B 




ji i J POLISHING POND-VOLUME 






^^'\ 



ii- 






1 ,000 



800 



600 -sr 



400 



200 



MMMMMMMMM 
83 I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 

Figure 7.12 Lagoon Water Quality Data for Boron and Polishing Pond Volume, 
1983 to 1991. 



120 



100 



E 



O 

o 

CD 



POLISHING POND 



■% 






\!^.A:!}l.l.r^.:j^ 




14 
13 

"in 
I2I 



11 

10 

9 

8 



o 



M M M 

83 I 84 I 85 



Figure 7.13 Lagoon Water Quality Data for Boron and Polishing Pond pH, 
1983 to 1991. 



64 
7.7 Interceptor Trench 

When Ash Lagoon No. 3 North was built, two separate interceptor trenches were also 
constmcted along the toe side of Dykes "H" and "I". Each interceptor trench consists of 
two legs that drain into a manhole. The west interceptor trench's manhole (designated 
DG1 ) is at junction of Dykes "D" and "H". One leg extends south from the manhole along 
Dyke "D" to the end of the dyke. The other leg extends east to about the half way point 
along Dyke "H". 

The second manhole is located at the junction of Dykes "H" and "I", (designated DG2). 
One leg extends west along Dyke "H" and stops before it hits the west interceptor trench. 
The second leg goes northeast along Dyke "I". 

Draining of the interceptor trenches is expected to keep the area downstream of Ash 
Lagoons No. 2 and No. 3 North from becoming saturated. This is desirable because this 
area will eventually become Ash Lagoon No. 3 South. It will be easier and less 
expensive to build this lagoon if the soil is not saturated. 

During the summer of 1989, electric pumps and discharge piping were installed in each 
manhole. The west manhole discharges in Ash Lagoon No. 2 and the east manhole into 
Ash Lagoon No. 3 North. Both pumps are activated by level controllers. The pumps 
were commissioned and put into service in December 1989. 



65 

Both pumps were in service during 1 990. In the first quarter of 1 990, discharge flow from 

the west manhole was regular and over the course of the year a noticeable decline in 
discharge flow was observed. 

A similar pattern was observed for the east manhole but by mid-year no discharge flow 
was occurring. When Investigated further it was determined there was no flow was 
coming in from the interceptor trenches feeding the east manhole. This is because 
groundwater levels surrounding the east manhole do not show gradients towards the east 
interceptor trench. 

The 1990 year end pumping patterns continued throughout 1991 for both manholes. The 
east pumpwell rarely discharged as the west pumpwell discharged at a regular pace. 

Poplar River Power Station started testing these manholes in May 1989, before pumping 
was started and have continued to do so on a quarterly basis. The water quality of both 
manholes is poor and of similar quality to that of the oxidized till piezometers. The poor 
water quality is because both manholes draw water from the upper horizons. Table 7.2 
summarizes the data and compares information from the two manholes before and after 
pumping was started. 

Since pumping has started, the water quality of the west manhole has declined for most 
tests. The increasing boron levels indicate there may be seepage activity from the 
lagoons towards the west interceptor trench but more analysis is needed to support this 



66 



Table 7.2 Water Quality for Lagoon Pumpwells DG1 and DG2, at Poplar River 
Power Station. 





DG1 


DG2 


Parameter' 


Before Pumping 
(<Dec. 1/89) 


After Pumping 
{>Dec. 1/89) 


Before Pumping 
(<Dec. 1/89) 


After Pumping 
(>Dec. 1/89) 




Avg. 


Avg. 


Avg. 


Avg. 


pH (units) 


7.8 


7.8 


8.0 


7.9 


Conductivity 


2710 


3580 


4400 


4462 


TDS 


2159 


3064 


3750 


3846 


Calcium 


149 


280 


505 


460 


Magnesium 


142 


245 


334 


354 


Sodium 


65 


100 


272 


275 


Potassium 


6.3 


8.2 


156 


15.0 


Sulphate 


1287 


2035 


2566 


2507 


Chloride 


35 


54 


100 


90 


Iron 


<0.01 


0.02 


0.04 


0.02 


Aluminum 


0.03 


0.05 


0.03 


0.15 


Fluoride 


0.37 


0.32 


0.23 


0.22 


Arsenic (ng/L) 


0.90 


0.70 


0.67 


0.44 


Boron 


1.5 


2.7 


1.20 


1.1 


Barium 


0.05 


0.05 


0.02 


0.03 


Cadmium 


<0.001 


<0.001 


<0.001 


<0.001 


Cobalt 


<0.001 


<0.001 


<0.001 


<0.001 


Chromium 


0.003 


<0.010 


0.002 


0.010 


Copper 










Mercury (^g/L) 


0.15 


0.13 


0.10 


0.17 


Manganese 


0.14 


0.03 


0.036 


0.006 1 


Molybdenum 


0.005 


0.013 


<0.001 


0.006 


Selenium 


0.001 


0.001 


0.03 


0.02 


Strontium 


1.36 


2.85 


1.81 


2.2 1 


Uranium 


58 


86 


94 


124 


Vanadium 


0.004 


0.003 


0.004 


<0.001 


Zinc 


0.19 


1.47 


3.6 


1.37 


* All values are mg/L 


unless otherwise noted 



67 
conclusion. For example, seepage activity should reduce chloride levels to equal those 

of the ash lagoons but instead chloride levels are increasing. 

7.8 Leachate Review 

Historically, the leachate review has been presented through the aid of graphs to show 
developing trends. This report uses maps to show changes in piezometric surface, in 
chloride and boron for the oxidized, unoxidized and Empress layers. A total of eighteen 
maps are provided in Appendix 5 of this report to demonstrate these changes. 

The piezometric surface for the oxidized strata shows a groundwater mound beneath the 
lagoons. As shown on the change in piezometric surface map, the groundwater mound 
extends from the east side of Ash Lagoon No. 2 where a six metre increase has been 
noted, to the west side of the polishing pond where levels have increased about four 
metres. Moving toward the reservoir, the oxidized till piezometers have shown a 
decreasing trend, reacting to lower reservoir levels. 

The largest changes in chloride and boron levels in the oxidized till have occurred where 
the piezometric levels have changed the most. This would be expected because 
changing water levels does suggest water movement. The increasing boron results on 
the east and south side of Ash Lagoon No. 2 along with the decreasing chloride levels 
suggests a leachate influence. On the west side of the polishing pond, the boron levels 
have changed little but the chloride levels have increased greatly, moving opposite to 



68 

lagoon chloride levels. A waterfront may be moving through this area ahead of a 

leachate front. 

There has been little change in boron or chloride levels for most of the oxidized till 
piezometers located by the reservoir. The only significant change in any of these 
piezometers has been C719 where chloride levels have decreased to 87 mg/L. The 
calculated groundwater movement in the oxidized till from the polishing pond to the 
reservoir is about 18 metres from 1981 to 1991. This is theoretically not yet far enough 
to affect this piezometer. 

Like for the oxidized layer, a groundwater mound has also developed for most of the 
unoxidized till piezometers extending from the east side of Ash Lagoon No. 2 to the west 
side of the polishing pond. The size of mound does not extend as far as the oxidized 
layer and not all unoxidized till piezometers are affected. For example, unoxidized till 
piezometer C764D is located within the mound area but has historically reacted to the 
reservoir and is showing a decreasing level. An examination of the boron and chloride 
levels does not indicate any distinct trends. 

The piezometric surface of the Empress gravels indicates a regional flow from west to 
south east below Morrison Dam. Around the lagoon area, there is a noticeable drop in 
piezometric head at the east side of Ash Lagoon No. 2. There is also an increasing 
mound at the east end of Ash Lagoon No. 3 North. 



69 

As a general observation, the closer the Empress piezometer is to the reservoir, the 

larger the decrease in water levels have been from 1983 to 1991. There appears to be 
less of a decrease beneath rather than around the lagoons. This may be due to upper 
horizon influences such as leachate movement or pore pressure or the water mound on 
the east of Ash Lagoon No. 3 North. 

The boron and chloride results for the Empress layer do not indicate significant changes. 
The largest change in boron near the lagoons is 0.48 mg/L. 

Leachate movement was also reviewed at piezometer C71 2B in the intra till sands on the 
north side of the polishing pond. Boron levels continue to show an increasing trend 
(Figure 7.14) and chloride results have been steady over the last several years (Figure 
7.15). A slug of leachate is probably affecting this piezometer rather than a continuous 
plume. Comprehensive monitoring should continue at this location. 

7.9 Ash Surcharging 

From October 26, 1991, to November 16, 1991, the dykes on Ash Lagoon No. 1 were 
built up making room for future ash stacking operations. Most of the activity during this 
period was concentrated at the south end of the lagoon, and the south half of the east 
ash dyke. The ash dykes in these areas were raised about two metres. 



70 



C712B 




5/25/79 10/6/80 2/18/82 7/3/83 11/14/84 3/29/86 8/11/87 12/23/88 5/7/90 9/19/91 

SAMPLE DATE RANGE 



Figure 7.14 Boron in Piezometer C712B. 



C712B 




5/25/79 10/6/80 2/18/82 7/3/83 11/14/84 3/29/86 8/11/87 12/23/88 5/7/90 9/19/91 

SAMPLE DATE RANGE 



Figure 7.15 Chloride in Piezometer C712B. 



71 
Following the completion of the work, the ash surcharge was surveyed to determine the 

slope of the ash. No slope was determined to be greater than 25%. 

While the work was being done on Ash Lagoon No. 1 , a small ash dyke was constructed 
at the south end of Ash Lagoon No. 2. This action became necessary to prevent ash or 
ash water discharging from Ash Lagoon No. 1 over Dyke "C" at the south of Ash Lagoon 
No. 2. Over the next several years it is anticipated that more ash dykes will be built on 
Ash Lagoon No. 2, as the surcharging project continues. Figure 7.16 shows the built up 
dykes on Ash Lagoons No. 1 and No. 2 as well as the condition of the other cells for 
December 31, 1991. 



72 







E 

Q> 
O 
O 

a 



s 

en 



c 
o 

(0 
0) 

>« 
Q 



d> 



UL 



73 
8.0 SEWAGE HOLDING POND 

8.1 Operations 

There was no change in the operation of the sewage holding pond during 1991 . Effluent 
fronn the sewage treatnnent plant is disposed of in the polishing pond after a period in the 
sewage holding pond. The total amount of sewage transferred in 1991 is estimated at 
1955 m^. Neither ash nor ash water was added during 1991 . 

8.2 Pond Quality 

Table 8.1 provides the results from the various points comprising the sewage facilities. 
There is no indication of an increasing trend in the polishing pond that would suggest an 
impact from the sewage facilities. 



74 



Table 8.1 Waste Water Data, November 1991, Poplar River Power Station. 



Parameter' 


Sewage Inlet 


Sewage 
Outlet 


Sewage 
Holding Pond 


Polishing 
Pond 


Chloride 


166 


127 


118 


32 


Conductivity 
(us/cm) 


2 450 


2 010 


2 240 


2 830 


Total Conform 
(Col/100 ml) 


27 000 


2 600 


60 


<1 


Total Kjeldahl 
Nitrogen 


48 


4.4 


1.6 


14.8 


Nitrate Nitrogen 
asN 


<0.003 


36.3 


1.3 


... 


Total 

Phosphorous 
as P 


6.6 


4.1 


1.1 


— 


Non-Filterable 
Residue 


260 


34 


13 


2.0 


Non-Filterable 
Residue Volatile 


214 


24 


4.4 


0.8 


5 Day, 20°C 
Biochemical 
Oxygen Demand 


123.5 


10.5 


5.7 


— 


* All concentration 


s mg/L unless oth 


enwise noted 







75 
9.0 AIR QUALITY 

9.1 Saskatchewan Environment and Public Safety 

During 1991 , ambient sulphur dioxide monitoring recorded no violations of Saskatchewan 
Environment and Public Safety's hourly and 24 hour average standards of 0.17 and 0.06 
ppm, respectively. The highest recorded hourly value of 0.137 ppm SOg was recorded 
on September 27 at 1 6:00 hours, as compared to 0.085 ppm SOg recorded in July, 1 990. 
The highest 24-hour average, reading of 0.011 ppm occurred on September 6 as 
compared to 1990's highest average reading of 0.012 ppm. There was no downtime for 
the monitor during the 12-month period, compared to 1990's 1.8%. Figures 9.1 and 9.2 
display maximum hourly and daily (24-hour) average readings obtained at the monitoring 
station during the last five years. 

Suspended particulate concentrations obtained from the high volume monitor at the same 
site for the 12-month period exceeded Saskatchewan Environment and Public Safety's 
24-hour average standard of 120 |ig/m^/24 hours on two occasions, September 3 and 
October 21 at 162.2 [ig/m^ and 197.7 ^g/m^ respectively. Wind data for October 21 
indicated that winds were blowing from the south to southeast indicating that the power 
plant could have been a possible source. The annual geometric mean of 31 .3 |ig/m^ is 
well below the provincial standard of 70.0 and is lower than 1990's annual geometric 
mean of 35.4 ^ig/m^. Downtime for the monitor was 3.3% compared to 23% in 1990. 



76 



CM 

o 

CO 




1981 1982 1983 1984 1986 1986 1987 1988 1989 1990 1991 

Figure 9.1 Maximum Daily SOj Air Quality Data, Coronach Water Treatment Plant, 
1981 to 1991, (Saskatchewan 24-hour standard). 




1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 

Figure 9.2 Maximum Hourly SO2 Air Quality Data, Coronach Water Treatment Plant, 
1981 to 1991, (Saskatchewan 1-hour standard). 



77 
9.2 SaskPower 

Ambient SOj monitoring conducted at SaskPower's station which is located 8.0 kilometres 
southeast of the plant, near the 49th parallel, showed no violation for 1991 , the same as 
in 1990. The highest hourly reading of 0.081 ppm occurred on October 17, 1991 at 4:00 
hours. Weather data recorded by Environment Canada's weather station located at 
Rockglen (37 kilometres northwest of the plant) indicated winds blowing from the plant 
towards the monitor at the time. This reading compares to the highest hourly reading of 
0.049 ppm recorded in 1990. Downtime for the monitor was 5.6%, as compared to the 
1990"s 1.3%. 

Suspended particulate concentrations at SaskPower's monitoring station exceeded 
Saskatchewan Environment and Public Safety's 24-hour standard on two occasions in 
1991, compared to five in 1990. The highest recorded value of 173.8 |ig/m^/24 hours 
occurred on September 3. This, as well as the other violation, were probably caused by 
field-blown dust as no specific episodes of heavy particulate release from the plant stack 
on violation days could be determined. The annual geometric mean of 26.8 ^ig/m^ is well 
below the provincial standard of 70.0 and compares with the 1990 mean of 35.4. 
Downtime for the sampler was 6.7%, as compared to 1 990's 1 .7%. 



78 
9.3 In-Stack Monitoring 

Sulphur dioxide averages in 1991 were very similar to those in 1990. Daily 
concentrations ranged from a low of 1 165 mg/m^ to a high of 4421 mg/m^ (corrected to 
3% O2) with an averaged yearly concentration of 2876 mg/m^ as compared to 2896 
mg/m^ in 1990. Downtime for the SOg in stack monitor was 19%, slightly higher than 
1990's 16%. Nitrogen oxide averages in 1991 were similar to those in 1990, with daily 
concentrations ranging from a low of 440 mg/m' to a high of 1047 mg/m^ (corrected to 
3% O2) with an average yearly concentration of 719 as compared to 741 in 1990. 
Downtime for the NO^ in-stack monitor was 24%, up from 1990's 16%. Daily opacity 
readings ranged from to 100%, with a yearly average of 45% compared to 37% in 
1 990. Downtime for the opacity monitor was 1 % as compared to 1 990's 4%. Stack gas 
flow rates ranged from a low of 466 mVs to a high of 714 mVs, with an average flow of 
651 m^/s in 1991. Downtime for the 12-month period in 1991 was 1%, the same as 
1990's. 

Units No. 1 and No. 2 operated with yearly average capacity factors of 88.7 and 86.2% 
respectively, compared to 88.1% and 88.4% in 1990. Totals combining both units were 
as follows: 

Coal - 3 841 000 kg in 1991, compared to 3 821 978 kg in 1990. 

Oil - 1823 m^ in 1991, compared to 2102 m^ in 1990. 

Gross Megawatt Hours - 4 534 100 in 1991 compared to 4 574 700 in 1990. 



79 
10.0 REFERENCES CITED 



Integrated Environments Limited. 1991. The Use of the Tydac SPANS GIS in the 
Assessment and Review of Pesticide Residues Detected in Surface Waters of 
the Prairie Provinces and the Northwest Territories. Calgary, Alberta, March 31 , 
1991, 138 pp. 

Irvine, J.A., Whitaker, S.H., and Broughton, P.L 1978. Coal Resources of Southern 
Saskatchewan - A Model for Evaluation Methodology. (Note: this report is 
listed three ways), Geological Survey of Canada Economic Geology Report 30 
or Department of Mineral Resources Report 209, or Saskatchewan Research 
Council Report 20; Part I, 151 pp. Part II, 56 oversize plates. 

Munro, D. 1985. Report on Mercury in the Cookson Reservoir. Water Quality 
Branch, Inland Waters Directorate, Environment Canada, Regina, 
Saskatchewan, WQB-WNR-85-02, 25 pp. 

Shaw, D.P. 1991 (in prep.). Mercury in fish from Cookson Reservoir. Water Quality 
Branch, Inland Waters Directorate, Environment Canada, Regina, 
Saskatchewan, October 1991. 

Walte, D.T., G.W. Dunn and R.J. Stedwill. 1980. Mercury in the Cookson Reservoir. 
Saskatchewan Department of Environment and Public Safety, Water Pollution 
Control Section, Report WPC No. 23. 

Water Quality Branch. 1980. Cookson Reservoir Aquatic Quality Baseline Survey, 
1979. Prepared for Saskatchewan Power Corporation, Contract E-021, Inland 
Waters Directorate, Environment Canada, Regina, Saskatchewan. 



ANNEX 1 

POPLAR RIVER 
COOPERATIVE MONITORING ARRANGEMENT 

CANADA-UNITED STATES 



A1 - 1 



September 23, 1980 
POPLAR RIVER COOPERATIVE MONITORING ARRANGEMENT 

I. PURPOSE 

This Arrangement will provide for the exchange of data collected as described in the 
attached Technical Monitoring Schedules in water quality, water quantity and air quality 
monitoring programs being conducted in Canada and the United States at or near the 
International Boundary in response to SaskPower development. This Arrangement will 
also provide for the dissemination of the data in each country and will assure its 
comparability and assist in its technical interpretation. 

The Arrangement will replace and expand upon the quarterly information exchange 
program instituted between Canada and the United States in 1976. 

II. PARTICIPATING GOVERNMENTS 

Governments and government agencies participating in the Arrangement are: 

Government of Canada: Environment Canada 
Government of the Province of Saskatchewan: 

Saskatchewan Environment and Public Safety 
Government of the United States of America: U.S. Geological Survey 
Government of the State of Montana: Executive Office 

III. POPLAR RIVER MONITORING COMMITTEE: TERMS OF REFERENCE 

A binational committee called the Poplar River Bilateral Monitoring Committee will be 
established to carry out responsibilities assigned to it under this Arrangement. The 
Committee will operate in accordance with the following terms of reference: 

A. Membership 

The Committee will be composed of four representatives, one from each of the 
participating Governments. It will be jointly chaired by the Government of Canada and the 
Government of the United States. There will be a Canadian Section and a United States 
Section. The participating Governments will notify each other of any changes in 
membership on the Committee. Co-chairpersons may by mutual agreement invite agency 
technical experts to participate in the work of the Committee. 



A1 - 2 



The Governor of the State of Montana may also appoint a chief elective official of local 
government to participate as an ex-officio member of the Committee in its technical 
deliberations. The Saskatchewan Minister of the Environment may also appoint a similar 
local representative. 

B. Functions of the Committee 

The role of the Committee will be to fulfill the purpose of the Arrangement by ensuring 
the exchange of monitored data in accordance with the attached Technical Monitoring 
Schedules, and its collation and technical interpretation in reports to Governments on 
implementation of the Arrangement. In addition, the Committee will review the existing 
monitoring systems to ensure their adequacy and may recommend to the Canadian and 
United States Governments any modifications to improve the Technical Monitoring 
Schedules. 

1. Information Exchange 

Each Co-chairperson will be responsible for transmitting to his counterpart Co-chairperson 
on a regular, and not less than quarterly basis, the data provided by the cooperative 
monitoring agencies in accordance with the Technical Monitoring Schedules. 

2. Reports 



(a) The Committee will prepare a joint Annual Report to the participating 
governments, and may at any time prepare joint Special Reports. 

(b) Annual Reports will 

i) summarize the main activities of the Committee in the year under Report 
and the data which has been exchanged under the Arrangement; 

ii) draw to the attention of the participating governments any definitive 
changes in the monitored parameters, based on collation and technical 
interpretation of exchanged data (i.e. the utilization of summary, statistical 
and other appropriate techniques); 

ill) draw to the attention of the participating governments any recommendations 
regarding the adequacy or redundancy of any scheduled monitoring 
operations and any proposals regarding modifications to the Technical 
Monitoring Schedules, based on a continuing review of the monitoring 
programs including analytical methods to ensure their comparability. 



A1 -3 



c) Special Reports may, at any time, draw to the attention of participating 
governments definitive changes in monitored parameters which may require 
immediate attention. 

d) Preparation of Reports 

Reports will be prepared following consultation with all committee members 
and will be signed by all Committee members. Reports will be separately 
forwarded by the Committee Co-chairmen to the participating governments. 
All annual and special reports will be so distributed. 

3. Activities of Canadian and United States Sections 

The Canadian and United States section will be separately responsible for: 

(a) dissemination of information within their respective countries, and the 
arrangement of any discussion required with local elected officials; 

(b) verification that monitoring operations are being carried out in accordance 
with the Technical Monitoring Schedules by cooperating monitoring 
agencies; 

(c) receipt and collation of monitored data generated by the cooperating 
monitoring agencies in their respective countries as specified in the 
Technical Monitoring Schedules; 

(d) if necessary, drawing to the attention of the appropriate government in their 
respective countries any failure to comply with a scheduled monitoring 
function on the part of any cooperating agency under the jurisdiction of that 
government, and requesting that appropriate corrective action be taken. 

IV. PROVISION OF DATA 

In order to ensure that the Committee is able to carry out the terms of this Arrangement, 
the participating governments will use their best efforts to have cooperating monitoring 
agencies, in their respective jurisdictions provide on an ongoing basis all scheduled 
monitored data for which they are responsible. 

V. TERMS OF THE ARRANGEMENT 

The Arrangement will be effective for an initial term of five years and may be amended 
by agreement of the participating governments. It will be subject to review at the end of 
the initial term and will be renewed thereafter for as long as it is required by the 
participating governments. 

A1 -4 



ANNEX 2 

POPLAR RIVER 
COOPERATIVE MONITORING ARRANGEMENT 

TECHNICAL MONITORING SCHEDULES 

1992 

CANADA-UNITED STATES 



A2- 1 



TABLE OF CONTENTS 



PREAMBLE A2 - 3 

CANADA 

STREAMFLOW MONITORING A2 - 5 

SURFACE WATER QUALITY MONITORING A2 - 7 

GROUND WATER QUALITY MONITORING A2 - 1 1 

GROUND WATER PIEZOMETERS TO MONITOR 

POTENTIAL DRAWDOWN DUE TO COAL SEAM DEWATERING A2 - 13 

GROUND WATER PIEZOMETERS LEVEL MONITORING 

- ASH LAGOON AREA 

SCHEDULE A - PIEZOMETERS IN TILL A2 - 15 

GROUND WATER PIEZOMETER LEVEL MONITORING 

- ASH LAGOON AREA AND INTERNATIONAL BOUNDARY AREA 

SCHEDULE B - PIEZOMETERS IN EMPRESS GRAVEL A2 - 17 

AMBIENT AIR QUALITY MONITORING A2 - 19 

SOURCE EMISSION MONITORING A2 - 21 

UNITED STATES 

STREAMFLOW MONITORING " A2 - 24 

SURFACE WATER QUALITY MONITORING A2 - 26 

GROUND WATER QUALITY MONITORING A2 - 28 

GROUND WATER LEVELS TO MONITOR POTENTIAL 

DRAWDOWN DUE TO COAL SEAM DEWATERING A2 - 30 



A2-2 



PREAMBLE 

The Technical Monitoring Schedule lists those water quantity, water quality and air quality 
monitoring locations and paranneters which form the basis for information exchange and 
reporting to Governments. The stmcture of the Committee responsible for ensuring the 
exchange takes place is described In the Poplar River Cooperative Monitoring 
Arrangement. 

The monitoring locations and parameters listed herein have been reviewed by the Poplar 
River Bilateral Monitoring committee and represent the basic technical information needed 
to Identify any definitive changes in water quantity, water quality and air quality at the 
International Boundary. The Schedule was initially submitted to Governments for approval 
as an attachment to the 1981 report Governments. Changes in the sampling locations 
and parameters may be made by Governments based on the recommendations of the 
committee. 

Significant additional information is being collected by agencies on both sides of the 
International Boundary, primarily for project management or basin-wide baseline data 
purposes. This additional information is usually available upon request from the collecting 
agency and forms part of the pool of technical information which may be drawn upon by 
Governments for specific study purposes. Examples of additional information are water 
quantity, water quality, groundwater and air quality data collected at points in the Poplar 
River basin not of direct concern to the Committee. In addition, supplemental information 
on parameters such as vegetation, soils, fish and waterfowl populations and aquatic 
vegetation is also being collected on either a routine or specific studies basis by various 
agencies. 



A2-3 



POPLAR RIVER 
COOPERATIVE MONITORING ARRANGEMENT 

TECHNICAL MONITORING SCHEDULES 

1992 

CANADA 



A2-4 



STREAMFLOW MONITORING 



Responsible Agency: Environment Canada 



Daily mean discharge or levels and instantaneous monthly extremes as normally 
published in surface water data publications. 



No. on Map 


Station No. 


Station Name 


*1 


11AE003 
(06178500) 


East Poplar River at 
International Boundary 


2 


11AE013 


Cookson Reservoir near 
Coronach 


3 


11AE015 


Girard Creek near Coronach 
Cookson Reservoir 


4 


11AE014 


East Poplar River above 
Cookson Reservoir 


5 


**Fife Lake Overflow 




*6 


11AE008 
(06178000) 


Poplar River at International 
Boundary 



International gauging station 

Miscellaneous measurements of outflow to be made by 

Sask Water during periods of outflow only. 



A2-5 




5 10 15 Km 



HYDROMETRIC GAUGING STATIONS (CANADA) 



A2- 6 



SURFACE WATER QUALITY 



Sampling Locations 



Responsible Agency: Saskatchewan Environment and Public Safety 


No. on Map 


Station No. 


Station Name 


1 


7904 


Fife Lake Overflow 


2 


12412 
Discontinued 


Girard Creek at Coronacfi Reservoir Outflow 


3 


12377 
Discontinued 


Upper End of Cookson Reservoir at Highiway 36 


4 


12368 


Cookson Reservoir near Dam 


5 


12386 
Discontinued 


East Poplar River at Culvert Immediately 
Below Cookson Reservoir 



Responsible Agency: Environment Canada 


No. on Map 


Station No. 


Station Name 


6 


00SA11AE0008 


East Poplar River at International Boundary 



A2-7 



PARAMETERS 



Responsible Agency: Saskatchewan Environment and Public Safety 


ESQUADAr Code 


Parameter 


Analytical Method 




Sampling Frequency 












Statnn No. 






1 


2 


3 


4 


5 


10151 


Alkalinity-phenol 


Pot. Titration 


OF 


Q 


Q 


Q 


Q 


10101 


AlkaBn«y-tot 


Pot. Titration 


OF 


Q 


Q 


Q 


Q 


13004 


Aluminum tot 


AA-direct 




A 


A 


A 


A 


33004 


Arsenic-tol 


Flameless-AA. 




A 


A 


A 


A 


06201 


Bicarbonates 


Caknjiated 


OF 


Q 


Q 


Q 


Q 


05451 


Bororvtot 


ICAP 


W 


Q 


Q 


Q 


Q 


46002 


Cadmium-tot 


AA-Solvent extract (MIBK) 




A 


A 


A 


A 


20103 


Calcium 


AA-direct 


OF 


Q 


Q 


Q 


Q 


06052 


Cartx)n-tot Inorg. 


Infrared 


OF 







Q 


Q 


06005 


Cartx>n-tot Org. 


Infrared 


OF 




Q 


Q 


Q 


06301 


Cattsonates 


Caknjiated 


OF 





Q 


Q 





17203 


Chloride 


Automated Cok>urimetric 


OF 


Q 


Q 


Q 


Q 


06711 


Chlorophyll 'a' 


Spectrophotometry 




Q 


Q 


Q 


Q 


24004 


Chromium-tot 


AA-Direct 




A 


A 


A 


A 


36012 


ColHorm-fec 


Membrane Filtration 


OF 








Q 


Q 


36002 


CoMorm-tot 


Membrane FiMratton 


OF 


Q 





Q 


Q 


02041 


Conductivity 


Conductivity Meter 


W 





Q 


Q 





29005 


Copp«r-tot 


AA-Solvent extract (MIBK) 




A 


A 


A 


A 


09105 


Fluoride 


Specific ion electrode 




A 


A 


A 


A 


82002 


Lead-tot 


AA-Solvent extract (MIBK) 




A 


A 


A 


A 


12102 


Magnesium 


AA-Direct 


OF 


Q 


Q 


Q 


Q 


80011 


Mercury-tot 


Flameless AA 




A 


A 


A 


A 


42005 


Molybdenum 


AA-Solvent extract (MIBK) 




A 


A 


A 


A 


07015 


N-TKN 


Automated Colourimetric 


OF 


Q 


Q 


Q 


Q 


10401 


NFR 


Gravimetric 


OF 


Q 


Q 


Q 





10501 


NFR(F) 


Gravimetric 


OF 


Q 


Q 


Q 


Q 


28002 


Nickel-tot 


AA-Solvent extract (MIBK) 


OF 


Q 


Q 


Q 


Q 


07110 


Nitrate + NO, 


Automated Cok>urimetric 


OF 


Q 





Q 


Q 


06521 


Oil and Grease 


Pet. Ether Extraction 




A 


A 


A 


A 


08102 


Oxygen-diss 


Meter 


OF 


Q 


Q 


Q 





15406 


Phosphorus-tot 


Colourimetry 


OF 


Q 


Q 


Q 


Q 


19103 


Potassium 


Flame Photometry 


OF 


Q 


• Q 


Q 


Q 


34005 


Selenium-Ext 


Hydride Generation 




A 


A 


A 


A 


11103 


Sodium 


Flame Photometry 


OF 


Q 


Q 


Q 





16306 


Sulphate 


Cokiurimetry 


OF 


Q 


Q 


Q 


Q 


10451 


TDS 


Gravimetric 


OF 





Q 


Q 





02061 


Temperature 


Thermometer 


OF 


Q 


Q 


Q 


O 


23004 


Vanadium-tot 


AA-Direct 




A 


A 


A 


A 


30005 


Zinc-tot 


AA-Solveni extract (MIBK) 




A 


A 


A 


A 


10301 


PH 


Electrometric 


W 


Q 


Q 


Q 


Q 



* Computer storage and retrieval system - Saskatchewan Environment and Public Safety. 

Symbols: 

W - Weekly during overflow; OF - Once during each period of overflow greater than 2 weeks' duration; 

Q - Quarteriy; A - Annually in tfie fall; AA - Atomic absorption; 

Pol - Potentiometric; NFR - Nonfilterable residue; NFRF - Nonfilterable residue, fixed; 

ICAP - Inductively Coupled Argon Plasma; 

AA - Solvent Extract (MIBK) - Sample digested with HNO, and extracted with methyl isobutyl ketone; 



A2-8 



PARAMETERS (Continued) 





Responsible Agency: Environment Canada 




NAQUADAT- 


Parameter 


Analytical Method 


Sampling Frequency 


Code 






Station No. 6 


10151 


Alkalinity-phenolphthalein 


Potentiometric Titration 


BM 


10111 


Alkalinity-total 


Potentiometric Titration 


BM 


13102 


Aluminum-dissolved 


AA-Direct 


BM 


13302 


Aluminum-extracted 


AA-Direct 


BM 


07570 


Ammonia-free 


Calculated 


BM 


07540 


Ammonia- total 


Automated Colourlmetric 


BM 


33108 


Arsenic-dissolved 


ICAP-hydride 


BM 


56001 


Barium-total 


AA-Direct 


BM 


06201 


Bicarbonates 


Calculated 


BM 


05211 


Boron-dissolved 


ICAP 


BM 


96360 


Bromoxynll 


Gas Chromatography 


BM 


48002 


Cadmium-total 


AA Solvent Extraction 


BM 


20103 


Calcium 


AA-Direct 


BM 


06104 


Cartxsn-dlssolved organic 


Automated IR Detection 


BM 


06901 


Cartjon-particulate 


Elemental Analyzer 


BM 


06002 


Cartxsn-total organic 


Calculated 


BM 


06301 


Cartxj nates 


Calculated 


BM 


17206 


Chloride 


Automated Colourlmetric 


BM 


06717 


Chlorophyll a 


Spectrophotometric 


BM 


24003 


Chromium-total 


AA-Solvent Extraction 


BM 


27002 


Cobalt-total 


AA-Solvent Extraction 


BM 


36012 


Coliform-fecal 


Membrane Filtration 


BM 


36002 


Coliform-total 


Membrane Filtration 


BM 


02021 


Colour 


Comparator 


BM 


02041 


Conductivity 


Wheatstone Bride 


BM 


29005 


Copper-total 


AA-Solvent Extraction 


BM 


06610 


Cyanide 


Automated UV-Colourimetric 


BM 


09117 


Fluoride-dissolved 


Electrometric 


BM 


06401 


Free Carbon Dioxide 


Calculated 


BM 


10602 


Hardness 


Calculated 


BM 


17811 


Hexachlorobenzene 


Gas Chromatography 


BM 


08501 


Hydroxide 


Calculated 


BM 


26104 


Iron-dissolved 


AA-Direct 


BM 


82002 


Lead- total 


AA-Solvent Extraction 


BM 


12102 


Magnesium 


AA-Direct 


BM 


25104 


Mangan ese-d issolved 


AA-Dirflct 


BM 


80011 


Mercury-total 


Flameless AA 


BM 


07901 


N-particulate 


Elemental Analyzer 


BM 


07651 


N-total dissolved 


Automated UV Colourlmetric 


BM 


10401 


NFR 


Gravimetric 


BM 


28002 


Nickel-total 


AA-Solvent Extraction 


BM- 


07110 


Nitrate/Nitrite 


Colourlmetric 


BM 


07603 


Nitrogen-total 


Calculated 


BM 


10650 


Non-Carbonate Hardness 


Calculated 


BM 


18XXX 


Organo Chlorines 


Gas Chromatography 


BM 


08101 


Oxygen-dissolved 


Winkler 


BM 


15901 


P-particulate 


Calculated 


BM 


15465 


P-total dissolved 


Automated Colourlmetric 


BM 


185XX 


Phenoxy Herbicides 


Gas Chromatography 


BM 


15423 


Phosphorus-total 


Colourlmetric (TRAACS) 


BM 


19103 


Potassium 


Flame Emission 


BM 


11250 


Percent Sodium 


Calculated 


BM 


00210 


Saturation Index 


Calculated 


BM 


34108 


Selenium-dissolved 


ICAP-hydride 


BM 


14108 


Silica 


Automated Colourlmetric 


BM 


11103 


Sodium 


Flame Emission 


BM 


00211 


Stability Index 


Calculated 


BM 


16306 


Sulphate 


Automated Colourlmetric 


BM 


00201 


TDS 


Calculated 


BM 


02061 


Temperature 


Digital Thermometer 


BM 


02073 


Turbidity 


Nephelometry 


BM 


23002 


Vanadium-total 


AA-Solvent Extraction 


BM 


30005 


Zinc-total 


AA-Solvent Extraction 


BM 


10301 


pH 


Electrometric 


BM 


92111 


Uranium 


Fluometric 


MC 



' - Computer Storage end Ratriaval System •• Environment Canada 
AA - Atomic Absorption IR - Infrared 

NFR - Nonfilterable Residue MC - Monthly Composite 

ICAP - Induaively Coupled Argon Plasma 



UV - Ultraviolet 

BM - Bimonthly (Alternate months sampled by U.S.G.S.) 



A2- 9 




Jkk ENVIRONMENT SASKATCHEWAN 
■ ENVIRONMENT CANADA 



A 

SCALE 



SURFACE WATER QUALITY MONITORING STATIONS (CANADA) 



A2- 10 



GROUND WATER QUALITY MONITORING 
SAMPLING LOCATIONS 



Responsible Agency: Saskatchewan Environment and Public Safety 






STATION DESCRIPTION || 


Map 


SPC 


Tip of Screen 




Location No. 


Piezometer No. 


Elevation (m) 


Material 


8a 


C726A" 


746.338 


unoxidized till 


at 


C762C" 


752.739 


oxidized till 


8a 


C726E" 


738.725 


Empress gravel 


Oa 


C728A" 


753.405 


oxidized till 
unoxidized till 


9a 


C728B" 


743.265 


9a 


C728C" 


747.645 


mottled till 


8a 


C7280" 


752.305 


oxidized till 


9a 


C728E" 


739.912 


Empress gravel 


2a 


C712B 


746.112 


intra till sands 


2b 


C718" 


748.385 


mottled till 


2c 


C719" 


747.715 


oxidized till 


22 


C533" 


740.441 


Empress gravel 


23 


C534" 


753.449 


oxidized till 


18 


C741" 


735.153 


Empress gravel 


21 


C742" 


741.800 


Empress gravel 


24 


C714A" 


745.333 


unoxidized till 


2S 


C714D" 


750.459 


oxidized till 


28 


C714E" 


738.230 


Empress gravel 


27 


C774B" 


749.370 


oxidized till 


28 


C775A" 


753.320 


oxidized till 


29 


C775D" 


740.190 


Empress gravel 


2a 


C712A 


- 


unoxidized till 


2a 


C712C 


-■ 


mottled till 


2a 


C712D 


- 


oxidized till 


2a 


C766 


- 


ino'a till sands 


2a 


C767 


- 


intra till sands 


7* 


C729A" 


- 


unoxidized till 


7a 


C729B" 


- 


mottied till 


7a 


C729D" 


- 


oxidized till fl 


7a 


C729E" 


- 


Empress gravel 


ea 


C763A" 


- 


mottied till 


aa 


C763B" 


- 


oxidized till 


«a 


C763D" 


- 


unoxidized till 
Empress gravel 


8a 


C763E" 


- 


10 


C749" 


- 


mottied till 


7 


C655A" 


- 


unoxidized till 


3 


C713" 


- 


oxidized till 


4 


C714C" 


- 


oxidized till 


5 


C715" 


- 


oxidized till 


1 


C716" 


- 


oxidized till 


13 


C745" 


- 


oxidized till 


21 


C753" 


- 


oxidized till 


28 


C755B** 


- 


oxidized till 


4 


C776A" 


_ 


oxidized till 


4 


C776B" 


- 


oxidized till 


S 


C758" 




intra till sands 


C8S3A 


C653A" 


- 


unoxidized till 


4 


C757" 


- 


unoxidized till 


27 


C774C" 


- 


unoxidized till 


a 


C775C" 


- 


unoxidized till 


24 


C7S0" 


- 


unoxidized till 


23 . 


C751" 


- 


unoxidized till 


22 


C752" 


_ 


unoxidized till 


1 


C731" 


- 


Empress gravel 


C739 


C739" 


- 


Empress gravel 


27 


C774D" 


- 


Empress gravel 


28 


C77SD" 


- 


Empress grave) 


23 


C732" 


- 


Empress gravel 


22 


C733" 


- 


Empress gravel 


24 


C734" 


- 


Empress gravel 


CS31 


C531" 


- 


Oxidized till 


C520 


C529" 


- 


Empress gravel 


CS30 


C530" 


- 


Empress gravel 


CS32 


C532" 


- 


Empress gravel 


CS38 


C538" 


- 


Empress gravel 



Analyze annually for all Parameters on A2-12 (except conductivity and water level) 



•- Information not available 



A2- 11 



PARAMETERS 



Responsible Agency: Saskatchewan Environment and Public Safety 


ESQUADAT* 


Parameter 


Analytical Method 


Sampling Frequency 


Code 






Station No.: Piezometers 


10101 


Alkalinity-tot 


Pot-Titration 


A 


13105 


Aluminum- Diss 


AA-Direct 


3" 


33104 


Arsanic-Diss 


Flameless AA 


A 


56104 


Barium-Diss 


AA-Direct 


A 


06201 


Bi carbonates 


Calculated 


A 


05106 


Boron-Diss 


Colourimetry 


3" 


48102 


Cadmium-Diss 


AA-Solvent Extract (MIBK) 


A 


20103 


Calcium-DIss 


AA-Direct 


A 


06301 


Cart>onates 


Calculated 


A 


17203 


Chloride-Diss 


Colourimetry 


A 


24104 


Ohromium-Diss 


AA-Direct 


A 


27102 


Cobalt-Diss 


AA-Solvent Extract (MIBK) 


A 


02011 


Colour 


Comparator 


A 


02041 


Conductivity 


Conductivity Meter 


4" 


29105 


Copper-Diss 


AA-Solvent Extract (MIBK) 


A 


09103 


Fluoride-Diss 


Specific Ion Electrode 


A 


26104 


Iron-Diss 


AA-Direct 


A 


82103 


Lead-Diss 


AA-Solvent Extract (MIBK) 


A 


12102 


Magnesium-Diss 


AA-Direct 


A 


25104 


Manganese- Diss 


AA-Direct 


A 


80111 


Mercury- Diss 


Flameless AA 


A 


42102 


MoiytxJenum-Diss 


AA-Solvent Extract (N-Butyl acetate) 


A 


10301 


pH 


Electrometric 


3" 


19103 


Potassium-Diss 


Flame Photometry 


A 


34105 


Selenium-Diss 


Hydride generation 


A 


14102 


Silica-Diss 


Colourimetiy 


A 


11103 


Sodium-Diss 


Flame Photometry 


A 


38101 


Strontium-Diss 


AA-Direct 


3" 


16306 


Sulphate-Diss 


Colourimetry' 


3" 


10451 


TDS 


Gravimetric 


3" 


92111 


Uranium-Diss 


Fluorometry 


3" 


23104 


Vanadium-Diss 


AA-Direct 


A 


97025 


Water Level 




4 


30105 


Zinc-Diss 


AA-Solvent Extract (MIBK) 


• 



No zinc or iron for Piezometers C531 to C538. SYMBOLS: AA - Atomic absorption 
* Computer storage and retiieval system A - Annually 

- Saskatchewan Environment and Public Safety 3 - 3 times/year 

** Analyze annually for these Piezometers Nos. AA - Solvent Extract (MIBK) - sample acidified and 

extracted with Methyl Isobutyl Ketone. 



A2- 12 



GROUND WATER PIEZOMETERS TO MONITOR POTENTIAL DRAWDOWN 
DUE TO COAL SEAM DEWATERING 



Responsible Agency: Saskatchewan Environment and Public Safety 


Measurement Frequency: Quarterly 


Piezometer 
Number 


Location 


Tip Of Screen 
Elevation (m) 


Perforation Zone 
(depth in metres) 


52 


NW 14-1-27 W3 


738.43 


43 - 49 (in coal) 


506A 


SW 4-1-27 W3 


748.27 


81-82 (in coal) 


507 


SW 6-1-26 W3 


725.27 


34 - 35 (in coal) 


509 


NW 11-1-27 W3 


725.82 


76 - 77 (in coal) 


510 


NW 1-1-28 W3 


769.34 


28 - 29 (in layered 
coal and clay) 



A2- 13 




5 10 15 Km 



GROUNDWATER PIEZOMETERS TO MONITOR POTENTIAL 
DRAWDOWN DUE TO COAL SEAM DEWATERING 



A2- 14 



GROUNDWATER PIEZOMETER LEVEL MONITORING -- ASH LAGOON AREA 

Schedule A -- Piezometers in Til! 



Responsible Agency: Saskatchewan Environment and Public Safety 


STATION 


PIEZOMETER NO. 


FREQUENCY OF MEASUREMENT 


la 


C716 


All piezometer levels 


lb 
1e 


C717 
C711 


are measured quarterly. 


1 


C765 




2a, 


C712A 


2a, 


C712B 




2*. 


C712C 




2a. 


C712D 




2b 


C718 




2c 


C719 




3a 


C713 


3b 


C720 




3c 


C721 




4 


C714B 




4 


C722 




4 


C723 




5 


C724 




5 


C725 




6a, 


C763A 


6a. 


C763B 




Hi 


C763C 




684 


C763D 




6b 


C765B 




6b 


C765C 




6b 


C765D 




6b 


C765E 




6c 


C767B 




7a, 


C729A 


7a, 


C729B 




7-, 


C729C 




7a, 


C729D 




7 


C655B 




C534 


C534 




C528 


C528 




C654 


C654 




8a, 


C730A 


8b, 


C727A 




8b, 


C727B 




«^ 


C727C 




8c, 


C726A 




8c 


C726B 




8c, 


C726C 




8d 


C748 




9a, 


C764A 


9a, 


C764B 




»% 


C764C 




9«U 


C764D 




9b, 


C728A 




», 


C728B 




9b, 


C728C 




9b, 


C728D 




11 


C747 




15 


C746 




28 


C768C 




28 


C768D 




28 


C768E 


---- --- ■ 



A2- 15 



R.27 



LEGEND: 

n SINGLE PIEZOMETER IN TILL 
B NESTED PIEZOMETER IN TILL 
5 SITE NUMBER 



/N\ 

SCALE 
500 1000 METRES 

10 MILE 



0.5 




U.S.A. 
PIEZOMETER INSTALLATION SITES-SCHEDULE "A" PIEZOMETERS IN TILL 



A2- 16 



GROUNDWATER PIEZOMETER LEVEL MONITORING 
ASH LAGOON AREA AND INTERNATIONAL BOUNDARY AREA 

Schedule B - Piezometers in Empress Gravel 



Responsible Agency: Saskatchewan Environment and Public Safety 


STATION 


PIEZOMETER NO. 


FREQUENCY OF 
MEASUREMENT 


IMMEDIATE ASH LAGOON AREA 


1 


C731 


All piezometers are nrwnitored 


6a 


C763E 


quarterly 


6b 


C765A 




C529 


C529 




C530 


C530 




C532 


C532 




C533 


C533 




C538 


0538 




8 


C730E 




9 


0728 E 




9 


C764E 




6b 


C765A 




4 


C766A 




6c 


C767A 




28 


C768A 




C535 


0535 




1 


0536 




C537 


C537 




3 


C542 




WEST OF ASH LAGOON AREA 


11 


0743 


All piezometers are monitored 


14 


C740 


quarterly 


16 


0756 




12 


0737 




SOUTH OF ASH LAGOON AREA 


C525 


0525 


All piezometers are monitored 


C526 


0526 


quarterly 


C527 


0527 




C539 


0539 




C540 


C540 




18 


0741 




20* 


0736 




21 


0742 




22 


0733 




23 


0732 




24 


0734 




14 


C740 




11 


0743 




16 


C756 





inactive as of 1989 



A2- 17 



r 



T.I 



R.27 



LEGEND: 

PIEZOMETERS 
EMPRESS GR« 

A PIEZOMETERS IN MERT SEAM 

5 SITE NUMBER 



A 

SCALE 



1000 METRES 

5 1.0 MILE 




U.S.A. 
PIEZOMETER INSTALLATION SITES-SCHEDULE "B" PIEZOMETERS IN EMPRESS GRAVEL 



A2- 18 



AMBIENT AIR QUALITY MONITORING 



Responsible Agency: Saskatchewan Environment and Public Safety 


NO. ON 
MAP 


LOCATION 


PARAMETERS 


REPORTING FREQUENCY 


1 


Coronach 
(Discontinued) 


Sulphur Dioxide 


Continuous monitoring with 
hourly averages as summary 
statistics. 






Wind speed and 
direction 


Continuous monitoring with 
hourly averages as summary 
statistics. 






Total Suspended 
Particulate 


24-hour samples on a 6-day 
cycle, corresponding to the 
National Air Pollution 
Surveillance Sampling Schedule. 


2 


International 
Boundary * 


Sulphur Dioxide 


Continuous monitoring with 
hourly averages as summary 
statistics. 






Total Suspended 
Particulate 


24-hour samples on 6-day cycle, 
corresponding to the National Air 
Pollution Surveillance Sampling 
Schedule. 


METHODS 


Sulphur Dioxide 


Saskatchewan Environment and Public Safety 
Colourimetric Titration, Pulsed Fluorescence 


Total Suspended Particulate 


Saskatchewan Environment and Public Safety 
High Volume Method 



* This station operated by SaskPower. 



A2- 19 




5 10 15 Km 



AMBIENT AIR QUALITY MONITORING (CANADA) 



A2-20 



SOURCE EMISSION MONITORING 



Responsible Agency: Saskatchewan Environment and Public Safety 


No. on Map 


Station Location 


Parameters 


Sampling 
Frequency 


1 


At Poplar River 
Power Plant 


Sulphur Dioxide, 
Nitrogen Dioxide, 
Opacity. 


Continuously 
reported as Hourly 
Averages 


METHODS 


Sulphur Dioxide 


Saskatchewan Environment and Public Safety 
- Ultraviolet Absorption 


Nitrogen Dioxide 


Saskatchewan Environment and Public Safety 
- Chemiluminescence 


Opacity 


Saskatchewan Environment and Public Safety 
- Optical 



A2-21 



T.I 



R.27 



/N\ 

SCALE 



500 1000 METRES 

0.5 1.0 MILE 




SOURCE EMISSION MONITORING 



U.S. A 



A2- 22 



POPLAR RIVER 
COOPERATIVE MONITORING ARRANGEMENT 

TECHNICAL MONITORING SCHEDULES 

1992 

UNITED STATES 



A2- 23 



STREAMFLOW MONITORING 



Responsible Agency: United States Geological Survey 


No. on Map 


Station Number 


Station Name 


'• 


06178000 (11AE008) 


Poplar River at International 
Boundary 


2* 


06178500 (11 AE003) 


East Poplar River at 
International Boundary 



International Gauging Station 



A2-24 




SCALE 



5 10 15 Km 



HYDROMETRIC GAUGING STATIONS (UNITED STATES) 



A2-25 





SURFACE WATER QUALITY MONITORING - 


Station Location 




Responsible Agency: U.S. Geological Survey 


No. on Map 


USGS Station No. 


Station Name 


1 


06178000 


Poplar River at International Boundary 


2 


06178500 


East Poplar River at International Boundary 


3 


06179000 


East Poplar River near Scobey 


PARAMETERS 


WATSTORE* 


SAMPUNG FREQUENCY NO. 


Coda 


Parameter 


Analytical Method 


1 


2 


3 


90410 


Alkalinity - lab 


Elect. Titration 


M 


BM 


BM 


01106 


Aluminum - diss 


AE, DC Plasma 


SA 


SA 


SA 


00610 


Ammonia • tot 


Colorimetric 


M 


BM 


BM 


00625 


Ammonia +Org N-tot 


Cotorimetric 


M 


BM 


BM 


01000 


Arsenic - diss 


AA. hydride 


SA 


SA 


SA 


01002 


Arsenic - tot 


AA, hydride 


A 


A 


A 


01010 


Beryllium - diss 


ICP 


SA 


SA 


SA 


01012 


Beryllium - tot/rec 


AA - Persulfate 


A 


A 


A 


01020 


Boron - diss 


AE, DC Plasma 


M 


BM 


BM 


01025 


Cadmium - diss 


AA, GF 


SA 


SA 


SA 


01027 


Cadmium - tot/rec 


AA, GF - Persulfate 


A 


A 


A 


00915 


Calcium 


ICP 


M 


BM 


BM 


00680 


Cart>on - tot Org 


Wet Oxidation 


SA 


SA 


SA 


00940 


Chloride - diss 


Cokirimetric 


M 


BM 


BM 


01030 


Chromium - diss 


AE, DC Plasma 


SA 


SA 


SA 


01034 


Chromium - tot/rec 


AE, DC Plasma Persulfate 


A 


A 


A 


00080 


Colour 


Electrometric, visual 


M 


BM 


BM 


00095 


Conductivity 


Wheatstone Bridge 


M 


D 


BM 


01040 


Copper - diss 


AA, GF 


SA 


SA 


SA 


01042 


Copper - tot/rec 


AA, GF - Persulfate 


A 


A 


A 


00061 


Discharge - Inst 


Direct measurement 


M 


BM 


BM 


00950 


Fluoride 


Electrometric 


M 


BM 


BM 


01046 


Iron - diss 


AE, ICP 


M 


BM 


BM 


01045 


Iron - tot/rec 


AA- Persulfate 


A 


A 


A 


01049 


Lead - diss 


AA, GF 


SA 


SA 


SA 


01051 


Lead - tot/rec 


AA. GF - Persulfate 


A 


A 


A 


00925 


Magnesium - diss 


AA 


M 


BM 


BM 


01056 


Manganese - diss 


ICP 


SA 


SA 


SA 


01 OSS 


Manganese - tot/rec 


AA- Persulfate 


A 


A 


A 


01065 


Nickel - diss 


AA, GF 


SA 


SA 


SA 


01067 


Nickel - tot/rec 


AA, GF - Persulfate 


A 


A 


A 


00615 


Nitrite - tot 


Colorimetric 


M 


BM 


BM 


00630 


Nitrate + NitrKe - tot 


Colorimetric 


M 


BM 


BM 


00300 


Oxygen-diss 


Winkler/meter 


M 


BM 


BM 


70507 


Phos, Ortho-tot 


Cotorimetric 


M 


BM 


BM 


00400 


PH 


Electrometric 


M 


BM 


BM 


00665 


Phosphorous - tot 


Cokarimetric 


M 


BM 


BM 


00935 


Potassium - diss 


AA 


M 


BM 


BM 


00931 


SAR 


Cak:ulated 


M 


BM 


BM 


80154 


Sediment - cone. 


Filtration-Gravimetric 


M 


BM 


BM 


801 SS 


Sediment - load 


Cak:ulated 


M 


BM 


BM 


01145 


Selenium - diss 


AA. hydride 


SA 


SA 


SA 


01147 


Selenium tot 


AA, hydride 


A 


A 


A 


00955 


Silica 


ICP 


M 


BM 


BM 


00930 


Sodium 


ICP 


M 


BM 


BM 


00945 


Sulphate - diss 


Turbimetry 


M 


BM 


BM 


70301 


Total Dissolved Solids 


Cak:ulated 


M 


BM 


BM 


00010 


Temp Water 


Stem Themiometer 


M 


BM 


BM 


00020 


Temp Air 


Stem Themiometer 


M 


BM 


BM 


00076 


Turbidity 


Nephelometric 


M 


BM 


BM 


80020 


Uranium - diss 


Spectrometry 


- 


MC 




01090 


Zinc - diss 


ICP 


SA 


SA 


SA 


01092 


Zinc - tot/rec 


AA- Persulfate 


A 


A 


A 



SYMBOLS: C - continuous; D - daily; M - monthly; BM - bimonthly; MC - monthly composite; 
* - Computer storage and A - annually at high flow; SA - semi-annually at low and high flow; GF - graphite furnace 

retrieval system - USGS AA - atomic absorption; tot - total; rec - recoverable; diss - dissolved; 

AE ■ atomic absorption; DC - direct current; ICP - inductively coupled plasma; 



A2- 26 




5 10 15 Km 

1 

5 10 Miles 



SURFACE WATER QUALITY MONITORING STATIONS (UNITED STATES) 



A2- 27 



GROUND WATER QUALITY MONITORING - Station Locations 



Responsible Agency: Montana Bureau of Mines and Geology 


Map 


Well 


Total Depth (a) 


Casing 


Aquifer 


Perforation 


Number 


Location 


(m) 


Diameter (cm) 




Zone (m) 


2 


37N47E17DABB 


79 


3.8 PVC 


Hart Coal 


76-79 


3 


37N47E23AADD 


36 


3.8 PVC 


Hart Coal 


33-36 


4 


37N48E23BBCC 


104 


3.8 PVC 


Fox Hiys - Hell Creek 


102-104 


5* 


37N47E1ABBB1 


16 


10.2 PVC 


Alluvium 


10-15 


6" 


37N47E1ABBB2 


25 


10.2 PVC 


Hart Coal 


19-25 


7* 


37N47E12BBBB 


14 


10.2 PVC 


Hart Coal 


39-45 


8" 


37N47E13AADD 


C3 


10.2 PVC 


Alluvium 


10-13 


9- 


37N47E13ADAA01 


13 


10.2 PVC 


Fort Union 


16-62 


10* 


37r448E5BAB6 


«7 


10.2 PVC 


Alluvium-Coal 


7-13 


11* 


37N48E5AAAA 


28 


15.2 STEEL 


Fox Hills - Hell Creek 


65-67 


12 


37N47ESoc11 DDDD 


62^ 


5.08 


Hart Coal 


15-18 


13 


37N47ES«c 3 CCCC 


82.6 


10.2 


Hart Coal 


56-59 


14 


37N47ES«; 4 BBAB 


80 


10.2 


Hart Coal 


75-78 


15* 


37t447E S«c 3 BBAA 


26 


10.2 


Hart Coal 


83-86 


16* 


37N46ES«c 3 ABAB 


88 


10.2 


Fort Union 


24-25 


17 


37N47ESec16DD00 


80 


10.6 


Hart Coal 


80-83 


18 


37N46E S«; 1 BBBA 


88 


10.2 


Hart Coal 


80-82 


19* 


37m7ESec15AAAB 


22 


10.2 


Hart Coal 


54-56 


20 


37N47E S^ 24 CCCC 


106 


5.08 


Hart Coal 


19-22 


21 


37N47E S«c 6 DBAA 


21 


10.2 


Hart Coal 


100-103 


22 


37N47ES«c 9 CBCC 




10.2 


Fort Union 


18-21 


Parameters 


Storet 

** 


Parameter 


Analytical Method 


Sampling Frequency Station 


No. 


Code 










00440 


Bi carbonates 


Electrometric Titration 


Sample collection is annually for 




01020 


Boron-diss 


Emission Plasma, ICP 


all locations identified above. 




00915 


Calcium 


Emission Plasma 






00445 


Cartx)nates 


Electrometric Titration 


The analytical method descriptions 


00940 


Chloride 


Ion Chromatography 


are those of the Montana Bureau of 




00095 


Conductivity 


Wheatstone Bridge 


Mines and Geology Laboratory where 




01040 


Copper-diss 


Emission Plasma, ICP 


the samples are analyzed. 




00950 


Fluoride 


Ion Chromatography 






01046 


Irondiss 


Emission Plasma, ICP 






01049 


Lead-diss 


Emission Plasma, ICP 






01130 


Lithium-diss 


Emission Plasma, ICP 






00925 


Magnesium 


Emission Plasma, ICP 






01056 


Manganese-diss 


Emission Plasma, ICP 






01060 


Molytxdenum 


Emission Plasma, ICP 






00630 


Nitrate 


Ion Chromatography 






00400 


PH 


Electrometric 






00935 


Potassium 


Emission Plasma, ICP 






01145 


Selenium-diss 


AA 




00955 


Silica 


Emission Plasma, ICP 






00930 


Sodium 


Emission Plasma, ICP 






01080 


Strontium-diss 


Emission Plasma, ICP 






00445 


Sulphate 


Ion Chromatography 






00190 


Zinc-diss 


Emission Plasma, ICP 






70301 


TDS 


Calculated 







Inactive as of 1989 SYMBOLS: AA - Atomic Absorption; 

Computer storage and retrieval system - USGS ICP - Inductively Coupled Plasma Unit 



A2- 28 



"^ 




GROUND WATER QUALITY MONITORING (UNITED STATES) 



A2- 29 



GROUND WATER LEVELS TO MONITOR POTENTIAL 
DRAWDOWN DUE TO COAL SEAM DEWATERING 



Responsible Agency: Montana Bureau of Mines and Geology 


No. on Map 


Sampling | 


2 to 22 


Determine water levels quarterly | 



A2-30 




15 Km 
10 Miles 



GROUNDWATER PIEZOMETERS TO MONITOR POTENTIAL 
DRAWDOWN DUE TO COAL SEAM DEWATERING 



A2- 31 



ANNEX 3 



REPORTS REVIEWED DURING 1991 
BY THE POPLAR RIVER BILATERAL MONITORING COMMITTEE 



A3- 1 



REPORTS REVIEWED DURING 1991 
BY THE POPLAR RIVER BILATERAL MONITORING COMMITTEE 



Collerson, K.D., D.J. Gregor, D. McNaughton and A.S. Baweja, 1991, Effect of Coal 
Dewatering and Coal use on the Water Quality of the East Poplar River, 
Saskatchewan: A Literature Review, Regina, Saskatchewan, Inland Waters 
Directorate, Scientific Series No. 177, 58 pp. 

Integrated Environments Ltd., March 31 , 1991 , The use of the Tydac SPANS GIS in 
the assessment and review of pesticide residues detected in surface waters of 
the Prairie Provinces and the Northwest Territories, Calgary Alberta, 138 pp. 

Phillips, Glenn R., Patricia A. Medvick, Donald R. Skaar and Denise E. Knight, 1987, 
Factors affecting the mobilization, transport and bioavailability of mercury in 
reservoirs of the Upper Missouri River Basin, U.S. Fish and Wildlife Service, 
Technical Report 10, 64 pp. 



A3 -2 



ANNEX 4 

RECOMMENDED FLOW APPORTIONMENT 

IN THE POPLAR RIVER BASIN 

BY THE INTERNATIONAL SOURIS-RED RIVERS ENGINEERING BOARD, 

POPLAR RIVER TASK FORCE (1976) 



A4- 1 



* RECOMMENDED FLOW APPORTIONMENT 
IN THE POPLAR RIVER BASIN 



The aggregate natural flow of all streams and tributaries in the Poplar River Basin 
crossing the International Boundary shall be divided equally between Canada and the 
United States subject to the following conditions: 

1 . The total natural flow of the West Fork Poplar River and all its tributaries crossing 
the International Boundary shall be divided equally between Canada and the 
United States but the flow at the International Boundary in each tributary shall not 
be depleted by more than 60 percent of its natural flow. 

2. The total natural flow of all remaining streams and tributaries in the Poplar River 
Basin crossing the International Boundary shall be divided equally between 
Canada and the United States. Specific conditions of this division are as follows: 

(a) Canada shall deliver to the United States a minimum of 60 percent of the 
natural flow of the Middle Fork Poplar River at the International Boundary, 
as determined below the confluence of Goose Creek and Middle Fork. 

(b) The delivery of water from Canada to the United States on the East Poplar 
River shall be determined on or about the first day of June of each year as 
follows: 

(I) When the total natural flow of the Middle Fork Poplar River, as 
determined below the confluence of Goose Creek, during the 
immediately preceding March 1st to May 31st period does not 
exceed 4,690 cubic decameters (3,800 acre-feet), then a continuous 
minimum flow of 0.028 cubic metres per second (1 .0 cubic feet per 
second.) shall be delivered to the United States on the East Poplar 
River at the International Boundary throughout the succeeding 12 
month period commencing June 1st. In addition, a volume of 370 
cubic decameters (300 acre-feet) shall be delivered to the United 
States upon demand at any time during the 12 month period 
commencing June 1st. 

(ii) When the total natural flow of the Middle Fork Poplar River, as 
determined below the confluence of Goose Creek, during the 
immediately preceding March 1st to May 31st period is greater than 
4,690 cubic decameters (3,800 acre-feet), but does not exceed 

* Canada-United States, 1976, Joint studies for flow apportionment. Poplar 

River Basin, Montana-Saskatchewan: Main Report, International Souris- 
Red Rivers Board, Poplar River Task Force, 43 pp. 



A4- 2 



9,250 cubic decameters (7,500 acre-feet), then a continuous minimum flow 
of 0.057 cubic metres per second (2.0 cubic feet per second) shall be 
delivered to the United States on the East Poplar River at the International 
Boundary during the succeeding period June 1st through August 31st. A 
minimum delivery of 0.028 cubic metres per second (1.0 cubic feet per 
second) shall then be maintained from September 1st through to May 31st 
of the following year. In addition, a volume of 617 cubic decameters (500 
acre-feet) shall be delivered to the United States upon demand at any time 
during the 12-month period commencing June 1st. 

(iii) When the total natural flow of the Middle Fori< Poplar River, as determined 
below the confluence of Goose Creek, during the immediately preceding 
March 1 st to May 31 st period is greater than 9,250 cubic decameters (7,500 
acre-feet), but does not exceed 14,800 cubic decameters (12,000 acre- 
feet), then a continuous minimum flow of 0.085 cubic metres per second 
(3.0 cubic feet per second) shall be delivered to the United States on the 
East Poplar River at the International Boundary during the succeeding 
period June 1st through August 31st. A minimum delivery of 0.057 cubic 
metres per second (2.0 cubic feet per second) shall then be maintained 
from September 1 st through to May 31 st of the following year. In addition, 
a volume of 617 cubic decameters (500 acre-feet) shall be delivered to the 
United States upon demand at any time during the 12 month period 
commencing June 1st. 

(iv) When the total natural flow of the Middle Fork Poplar, as determined below 
the confluence of Goose Creek, during the immediately preceding March 
1st to May 31st period exceeds 14,800 cubic decameters (12,000 acres- 
feet) then a continuous minimum flow of 0.085 cubic metres per second 
(3.0 cubic feet per second) shall be delivered to the United States on the 
East Poplar River at the International Boundary during the succeeding 
period June 1st through August 31st. A minimum delivery of 0.057 cubic 
metres per second (2.0 cubic feet per second) shall then be maintained 
from September 1 st through to May 31 st of the following year. In addition, 
a volume of 1 ,230 cubic decameters (1 ,000 acre-feet) shall be delivered to 
the United States upon demand at any time during the 12-month period 
commencing June 1st. 

(c) The natural flow at the International Boundary in each of the remaining 
individual tributaries shall not be depleted by more than 60 percent of its 
natural flow. 

The natural flow and division periods for apportionment purposes shall be 
determined, unless othenwise specified, for periods of time commensurate with the 
uses and requirements of both countries. 

A4- 3 



ANNEX 5 



LEACHATE REVIEW 



A5- 1 




A5-2 




i^ 



A5-3 







A5 - 4 







A5- 5 




GO 
[Y 



A5-6 




n 



A5-7 




/ 



/ A5 - 8 










< 



<] 



i/i 



A5- 10 




CO 

CL 



<I 



< 



in 
ail 



A5- 11 




cif 


/^ 


\/, 


y 


\ ^y/ 








\^ 




w 





<3 



<^ 






<\ 



<a 



<j 



A5- 12 







Q- 



<1 



<] 



OJ 



^j 



A5- 13 







A5- 14 




C-0 



A5- 15 







A5- 16 




C/0 



Cl 



A5- 17 




<: 

[ — 


1 


uJ 


00 








> 


-1 Li_ 


Q^ 


LU 


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> 


^ c^ 


□ 


U 


Sy^\ 


Q- 


Qi 


L.I 


1— 




> 


X S 


5 


> 


□ M 
LJ 


Qi 


O 


qH 


<: 


Z 




_i 


r) 




CL 


□ 




a 


Qi 




c 


LD 





00 
LxJ 




C/0 

LiJ 



A5- 18 




A5- 19 



ANNEX 6 



METRIC CONVERSIONS 



A6- 1 



METRIC CONVERSION FACTORS 

ac - 4,047 m^ - 0.04047 ha 

ac-ft - 1,233.5 m' -1.2335 dam' ' 

C - 5/9(F''-32) 

cm - 0.3937 in. 

cm* - 0.155 in^ 

dam' - 1,000 m'- 0.8107 ac-ft 

If - 28.3171 X 10'm' 

ha - 10.000 m'- 2.471 ac 

hm - 100 m -328.08 ft 

hm* - 1x10*m' 

l.gpm - 0.0758 Us 

in - 2.54 cm 

kg - 2.20462 lb - 1.1 X 10' tons 

km - 0.62137 miles 

km* - 0.3861 mf* 

L - 0.3532 ft' -0.21997 I. gal -0.26420 U.S. gal 

Us m 0.035 cfs- 13.193 l.gpm = 15.848 U.S. gpm 

m - 3.2808 ftm^ = 1 0.7636 ft^ 

m* - 1,000 L- 35.3144 ft' -219.97 I. gal- 264.2 U.S. gal 

m'/8 - 35.314 cfs 

mm - 0.00328 ft 

tonne - 1,000 kg - 1.1023 ton (short) 

U.S. gpm . 0.0631 L/s 

For Air Samples 

ppm - 100 pphm - 1000 x (Molecular Weight of substance/24.45) mg/m' 

A6-2