BASIS OF COMPARISON

GREAT LAKES-ST. LAWRENCE RIVER SYSTEM

Deborah H. Lee, Editor

Great Lakes Environmental Research Laboratory

Ann Arbor, Michigan

April 1993

UNITED STATES

DEPARTMENT OF COMMERCE

Barbara Hackman Franklin

Secretary

NATIONAL OCEANIC AND

ATMOSPHERIC ADMINISTRATION

John A. Knauss

Under Secretary for Oceans

and Atmosphere/Administrator

Environmental Research

Laboratories

Joseph 0. Fletcher

Director
For sale by the National Technical Information Service, 5285 Port Royal Road

Springfield, VA 22061

ii
2.3 Net Basin Supplies ........................................................................................................................ 3

2.4 Outlet Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

2.5 Channel Flow Retardation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.6 Starting Elevations ........................................................................................................................ 6

2.7 Tidal Levels at the Outlet of the St. Lawrence River ...................................................................... 7

3. BASIS OF COMPARISON LEVELS AND FLOWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Levels ........................................................................................................................................... 7

3.2 Flows ............................................................................................................................................ 8

3.3 Lake Ontario Levels and Flows with Past Discretionary Actions ................................................... 8

4. ACKNOWLEDGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .................. 9

APPENDIX A - Graphical Presentation of Basis of Comparison Levels and Flows .................................. 11

Lake Superior ..................................................................................................................................... 12

Lakes Michigan-Huron ....................................................................................................................... 14

Lake St. Clair ..................................................................................................................................... 15

Lake Erie ........................................................................................................................................... 18

Lake Ontario ...................................................................................................................................... 20

...

111
Lake St. Pierre .................................................................................................................................... 27

APPENDIX B - Tabular Presentation of Basis of Comparison Levels and Flows ..................................... 29

Lake Superior ..................................................................................................................................... 30

Lakes Michigan-Huron ....................................................................................................................... 36

Lake St. Clair ..................................................................................................................................... 42

Lake Erie ............................................................................................................................................ 48

Lake Ontario ...................................................................................................................................... 54

Ogdensburg, New York ...................................................................................................................... 60

Cardinal, Ontario ................................................................................................................................ 63

Iroquois, Ontario ................................................................................................................................ 66

Morrisburg, Ontario ........................................................................................................................... 69

Long Sault Dam, New York ............................................................................................................... 72

Pointe Claire, Quebec ......................................................................................................................... 75

Montreal Harbour, Quebec ................................................................................................................. 77

Lake St. Pierre .................................................................................................................................... 79

APPENDIX C - Graphical and Tabular Presentation of Lake Ontario and St. Lawrence River Basis of Comparison

Levels and Flows with Past Discretionary Actions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

iv
Montreal Harbour, Quebec ............................................................................................................... 110

Lake St. Pierre ................................................................................................................................. 110

APPENDIX D - Graphical Presentation of the Differences in Basis of Comparison Levels

and Flows with and without Criterion C ........................................................................................... 117

Lake Superior and Lake Michigan-Huron ......................................................................................... 118

Lake St. Clair and Lake Erie ............................................................................................................ 118

Lake Ontario, with and without Past Discretionary Actions .............................................................. 119

TABLES

Table 1 .--Monthly Mean Welland Canal Flows .......................................................................................... 2

Table 2.--Estimated Consumptive Use ....................................................................................................... 3

Table 3.--Median Ice Retardation Values ................................................................................................... 5

Table 4.--Niagara River Average Weed Retardation ................................................................................... 5

Table 5.--Niagara River Ice Retardation ..................................................................................................... 6

Table 6.--Initial Starting Elevations ............................................................................................................ 6

Table 7.--Differences in Basis of Comparison Levels Between Two Independent Models (ft) ...................

.7

Table 8.--Differences in Basis of Comparison Flows Between Two Independent Models (cfs) ...................8
1. Introduction

The recorded Great Lakes and St. Lawrence River water levels and flows reflect the effects of changes in

the regime over the study period (1900-1989). The principal changes to the Great Lakes-St. Lawrence River

system during this period have primarily been anthropogenic and include changes in the amount of diversions

into, within, and out of the system, modifications to the connecting channels and the St. Lawrence River, and

the construction of control structures at the outlets of Lake Superior and Lake Ontario. In addition to these

changes, which can be related to a specific point in time, there have been changes in the runoff from the land

surface area due to deforestation and urbanization, increases in consumptive uses of water within the basin,

and the movement of the earth’s crust within the basin. These last items have been progressive over time

within the basin and have resulted in a gradual change in the water surface elevations of the individual lakes.

To have a common basis by which to compare the effects of various regulation plans, a set of lake levels

and flows has been developed that reflects a consistent hydraulic regime in the Great Lakes-St. Lawrence

River system over the study period. This hydraulic regime is defined by the diversion rates into and out of

the system, consumptive use withdrawals from the system, the time series of water supplies to the system,

outlet conditions of each lake, flow retardation due to ice or weeds in the connecting channels, initial starting

elevations for the simulation, the hydraulic condition of the St. Lawrence River, and tidal levels at its outlet.

These conditions have been specified and approved by the Study Board as follows.

2. Conditions

2.1 Diversions

Four diversions are considered in the development of the Basis of Comparison: the Chicago Diversion

from Lake Michigan; the Long Lac and Ogoki Diversions into Lake Superior; and the Welland Canal, which

flows from Lake Erie to Lake Ontario.

For the Chicago Diversion, a constant diversion of 3,200 cfs out of Lake Michigan is assumed. This is

the maximum allowable diversion at Chicago as specified by a decree of the U.S. Supreme Court dated June

12, 1967. This decree was modified in November 1980 to provide for a change in computational procedure,

with the maximum allowable diversion remaining at 3,200 cfs. This diversion consists of actual water

withdrawals from Lake Michigan, and of runoff that is now diverted to the Illinois River (IJC, 1985).

GLERL Contribution No. 828
Table 1. Monthly Mean Welland Canal Flows

Month Amount (cfs)

January 7,900

February 7,600

March 7,800

April 8,900

May 9,000

June 8,900

July 8,800

August 8,800

September 9,000

October 9,100

November 9,100

December 8,800

2.2 Consumptive Use

Consumptive use of water is that portion of water withdrawn or withheld from the Great Lakes-St.

Lawrence River system and assumed to be lost due to evaporation during use, transpiration from irrigated

crops, leakage, incorporation into manufactured products, or similar occurrences during use (IJC, 1985).

Estimates of consumptive use by basin, based on data published in the 1989 Annual Report of the Great

Lakes Regional Water Use Data Base Repository (GLC, 1991), indicate that this is a small but significant

component of the water balance for the Great Lakes. The total estimated consumptive use by basin is shown

in Table 2.

2
Lake Erie 714 700

Lake Ontario 342 300

St. Lawrence River 325 300

*The consumptive use values published by basin for 1989 were

prorated to include the 742 cfs State of Michigan consumptive use,

which was not reported by basin but was included in the state total.

Consumptive use for Lake St. Clair was estimated as a portion of Lake

Erie’s consumptive use, based on a ratio of drainage areas.

2.3 Net Basin Supplies

Net basin supplies for 1900 through 1989 computed as a residual of change in storage, inflows, outflows

and diversions, and coordinated between the U.S. Army Corps of Engineers and Environment Canada are

used for the Great Lakes.

For the St. Lawrence River between Cornwall, Ontario, and Beauhamois, Quebec (ie. Lake St. Francis),

net basin supplies computed by Hydro Quebec were used. Downstream of Beauharnois, net basin supplies

are not defined for the St. Lawrence River. For this downstream portion of the St. Lawrence River, recorded

outflows from the Ottawa River and five other major tributaries of the St. Lawrence are used to represent

local inflows to the river for 1950 to1989. These data were supplied by the Water Survey of Canada and

Hydro Quebec.

2.4 Outlet Conditions

Lake Superior and Lake Ontario are the only lakes of the five Great Lakes whose outflows are regulated.

For the Basis of Comparison, Lake Superior outflows are those determined in accordance with Plan 1977-A,

the current regulation plan implemented by the International Lake Superior Board of Control (ILSBC, 1989)

with Criterion C of the Orders of Approval (IJC, 1979) incorporated. Criterion C requires that whenever the

monthly mean level of Lake Superior is less than 600.5 feet on the International Great Lakes Datum of 1955,

the total discharge permitted is to be no greater than that which would have occurred under conditions prior

to 1887. Appendix D contains graphs of the differences in levels and flows between the Basis of Comparison

3
their outflows are computed from stage-discharge equations. Lake Huron and Lake St. Clair outflows are

representative of channel conditions that have existed since the completion of the 27-ft navigation channel

dredging in 1962 in the St. Clair - Lake St. Clair - Detroit River system. The equations representative of the

present channel conditions are

e,, =84.1168[(2,, +Z,,)/2-543.4]2(Z,, -Z,,)“.’

Qsc = 128.0849(&c - 543.8 1)2 (Zsc - Z,)“.’

(2)

where Q, and Q,, are the outflows from Lakes Michigan-Huron and Lake St. Clair through the St. Clair

River and the Detroit River, respectively. Z,, Zsc, and q are the monthly mean levels of Lakes MichiganHuron, Lake St. Clair, and Lake Erie.

Niagara River outflows from Lake Erie are represented by a discharge relationship derived using data for

1974 to 1986 (Quinn, 1989). The relationship is a single gauge, stage-discharge relationship:

QE = 260.5(2, - 550.1 1)2.2

where Q, is the outflow from Lake Erie through the Niagara River. All stage-discharge equations are based

on the International Great Lakes Datum, 1955, and flows are given in cubic feet per second. The flows are

adjusted for ice and weed retardation as described in the following section.

The flow in the St. Lawrence River upstream of Cornwall is regulated by the flow from the power plant

and spillway at Cornwall-Massena. Outflows from Lake St. Francis are completely controlled by the flows

from the power plants and spillways at Beauhamois and Les Cedres, Quebec. Due to the relatively small size

of Lake St. Francis, it is assumed that the quarter monthly outflow from Lake Ontario is discharged from

Lake St. Francis in the same quarter month period.

The distribution of outflows from the St. Lawrence River and the Ottawa River around the Island of

Montreal is determined with the ARCHIPEL model adapted from Hydro Quebec. This hydrologic routing

model reflects current channel conditions in the St. Lawrence and Ottawa River systems around the Montreal

archipelago and downstream to Lake St. Pierre.

4
January 19,000 16,000

February 16,000 12,000

March 4,000 3,000

April 0 0

December 3,000 3,000

For flow through the Niagara River from Lake Erie, monthly average values of weed retardation computed for 1974 through 1989 using flows published by the Coordinating Committee (CCGLBHHD, 1976)

and Eq. (4) are used. These values are shown in Table 4.

Table 4.-- Niagara River Average Weed Retardation

Month Weed

Retardation

kfs)

June 2,000

July 8,000

August 5,000

September 3,000

October 2,000

Although the installation of the Lake Erie ice boom in 1964 has reduced the severity and duration of ice

runs in the Niagara River, an analysis of ice retardation using Eq. (4) indicates that some ice retardation still

exists. Median ice retardation values as computed with the above equation from 1974 through 1989 are used.

These values are given in Table 5.

5
Ice and weed retardation are not incorporated into the ARCHIPEL model for the St. Lawrence River downstream of Beauhamois.

2.6 Starting Elevations

The starting elevations for year 1 of the Great Lakes are the recorded January monthly means for the

period of record 1900- 1989 (NOS, 1989) as shown in Table 6.

Table 6.-- Initial Starting Elevations

Lake

Elevation

(IGLD 55)

cft)

Lake Superior 600.39

Lakes Michigan-Huron 577.92

Lake St. Clair 572.84

Lake Erie 569.99

Lake Ontario 244.07

For the St. Lawrence River below Beauhamois, starting elevations for year 1 of the 1950-1989 period are

computed in the initialization portion of the ARCHIPEL model from initial flows that are entered into the

model for the first quarter of January 1950.

6
The Basis of Comparison levels for Lake Superior to Lake Erie were simulated under the conditions

described above with a hydrologic response model of the Great Lakes developed and maintained by the U.S.

Army Corps of Engineers, Detroit District (USACE, 1991). Levels for Lake Ontario and sites on the St.

Lawrence River above Cornwall, Ontario, were simulated using a similar hydrologic response model maintained by the Great Lakes-St. Lawrence River Office of Environment Canada. These models were verified by

comparing the levels generated by each model. The results of the two models differed within the ranges

shown in Table 7.

Table 7.-- Differences in Basis of Comparison Levels

Between Two Independent Models

Lake Differences

(ft)

Lake Superior -0.02 to +0.03

Lakes Michigan-Huron -0.03 to +0.04

Lake St. Clair -0.02 to +0.03

Lake Erie -0.02 to +0.02

Lake Ontario -0.06 to +0.05

These differences are due to rounding within the models, computational differences between machines,

and differences in software coding. The differences can be considered the degree of significance of the Great

Lakes Basis of Comparison levels; e.g., the levels are significant to roughly within 20.05 ft.

The ARCHIPEL model described in sections 2.3 and 2.4 was used to generate levels for sites on the St.

Lawrence River below Beauhamois, Quebec. Appendix A contains graphs of the Basis of Comparison

monthly mean levels for each lake and eight locations along the St. Lawrence River. These eight locations

are Ogdensburg, New York; Cardinal, Ontario; Iroquois, Ontario; Morrisburg, Ontario; Long Sault Dam,

New York; Pointe Claire, Quebec; Montreal Harbour, Quebec; and Lake St. Pierre, Quebec. Appendix B

lists the monthly mean levels, along with the average, standard deviation, maximum and minimum level for

each month of the series.

7
Lakes Michigan-Huron -600 to +600

Lake St. Clair -600 to +600

Lake Erie -500 to +500

Lake Ontario -2,700 to +3,300

The larger flow differences for Lake Superior and Lake Ontario are primarily due to a few specific cases

where the routed levels differed by a very small amount, causing the models to take different actions, resulting in different outflows. These differences were balanced in the following month’s outflow. The outflows

for the Basis of Comparison should be considered significant to within about H,O00 cfs. Appendix A

contains graphs of the monthly mean outflows from each lake. Appendix B lists the monthly mean flows,

along with the average, standard deviation, maximum and minimum flow for each month of the series. It

should be noted that the outflows for Lake Erie include those of the Niagara River and Welland Canal.

3.3 Lake Ontario Levels and Flows with Past Discretionary Actions

Appendix C contains the levels and flows for Lake Ontario and levels for the eight sites on the St.

Lawrence River under the Basis of Comparison conditions with past discretionary actions. It is included here

for comparative purposes only.

4. Acknowledgements

This work was performed in support of Phase II of the International Joint Commission Levels Reference

Study, by Task Group 2 of Working Committee 3, and was identified as Task 19.3.3 of the Plan of Study.

Members of the Task Group contributing to this report include Gordon Larsen of the Detroit District Corps of

Engineers and David Fay and Charles Southham of the Inland Waters Directorate, Environment Canada.
International Joint Commission. Supplementary Order of Approval, October 3, 1979. International Joint

Commission, Windsor, Ontario (1979).

International Joint Commission. Great Lakes diversions and consumptive uses. International Joint Commission, Windsor, Ontario, (1985).

International Lake Superior Board of Control. Regulation of Lake Superior, Plan 1977-A Development,

Description and Testing. International Joint Commission, Windsor, Ontario (1989).

International St. Lawrence River Board of Control. Regulation of Lake Ontario Plan 1958-D. International

Joint Commission, Windsor, Ontario (1963).

QUINN, F.H. Niagara river discharge equation developed for Phase I of the IJC Levels Reference Study.

Open file report, Great Lakes Environmental Research Laboratory, Ann Arbor, MI (1989).

National Ocean Service. Great Lakes water levels, 1989. National Oceanic and Atmospheric Administration,

Department of Commerce, Rockville, MD (1989).

U.S. Army Corps of Engineers. Great Lakes routing computer model. In Pre-Phase II IJC Levels Reference

Study - Feasibility of System Wide Regulation (unpublished report), U.S. Army Corps of Engineers,

Detroit District, International Lake Hydrology Section, 199 1.

9
APPENDIX A - Basis of Comparison Levels and Flows - CHARTS

11
I I

Lake Superior

Basis of Comparison, 1930-l 960

........m.“...--.............”.......-..--...-.““...“~.”..............“-......---.“..“.“”.._..._........”....“..

Year

I-- BocLevels ----- Master Gapa 1

Lake Superior

Basis of Comparison, 1960-i 990

“.......I........--.

...................”.......

--I 5955 . . . . . . . . . . . . . I..... . . . . . “” . . . . . ..-.......... I . . . . . . . . . . . . . . . . . . . ...*.... - . . . . ...” . . . . . . . * . . . . . . . . . . .._... _...” . . . . . . . . . . . . .

T’960 ’ ’ ’196~““““’ ’ 1970 1974 “““” 1960 l&i

1 1

Year

I-” BocLevds ----- Ma&Gage 1

12
Lake Superior

Basis of Comparison, 1930-l 960

130 __._ . . . . . . _..._ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._....-..............- . . . . . . . . . . --..

120

110

f?

e

100

.c 90

60

70

60

Year

Lake Superior

Basis of Comparison, 1960-i 990

,304_....._......._...._~~.................~~......~.....~...~.~~.....~..~......................-.................................. i"..-..- . . . . . . . . . 1

,20j ......................... .... ................................... ..-...,........... ..................... ................

110 .........................

l’T”.

. . .........

/.. r..

. . ........ b. ..I

2 9dl . . .._....-.. n..l.\.l.~+.~~

J”

4

VL ' ' '& ' ' 'jgY(j ' ' 'lij7S

Year

' 'd

13
g]

Lakes Michigan-Huron

Basis of Comparison, 1930-l 960

Lakes Michigan-Huron

Basis of Comparison, 1960-I 990

661,

I

.................... . ...................................................................................... ...................................

IfI y 580 ? .............. ........................................................ . ................................. . ... ..........................

0 4

~,

14

...................................................... . 4 ..

h

....... k........... bl. . . ....;"

....... . .._". ...... . . ........... &.~-.y... ... . . . . 1

. .

j 579 ..’

8 578Ii.

..................... . . . ..........

i m ,.- yl&..~~~..~ ..-:. ........Y.. .......v.. .....!!.

If \A

.-. ..._. ..........Y................. . .

Year

I-BocLevles ----- MasterGage 1

- Boc Levels ----- MasterGage

14
Lake Michigan-Huron

Basis of Comparison, 1930-l 960

Year

Lake Michigan-Huron

Basis of Comparison, 1960-i 990

26or-I 4_.............. . _...................... ..____ _ . . . . . ..__._......... _ . . . . . . . . . . . . . . _.. . . . . . . . . . . . . . - . . . . . . . _.. . .. . _.. . . . .. . . . .. . . . . . . . . . . .. . . ..

I

jq)- . . . . . . . . . . ..-..... u. . .

II

..-....... - . . . . . .. . . . . . . . . . . ._.” . . . . . . ..____..............-.......-...-....................I . . . . . . . . . . . . . . . . ..-- . . . . . -

1

T& 1 1 'l&jg ' ' '1$7d ' I 'I $7$ ’ ’ ‘idaci ’ -i--1 198 1990

Year

1 5
 BOC Levels  Master Gage

Lake St. Clair

Basis of Comparison, 1930-l 960

-...-.I.....” . . . . . . . . . . . . . . -..--- . . . . . - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... ” . . . . . . . . . . . .._.................._......._........_ .___._. ___......_.

570

t

-..-..-..-........ :...q .-.--.---..-.-..-.-“--.---.--.- .. . . . .. . -.” . . . . . . . . . . . ..-.....” . . . . . . . . .. . ..--.........................-..-......

I

=9sbd’l~““l”‘ll’ 1935 1940 1946 ““1”““” 1950 1955 Id60

Year

I- BOCLevels ----- Master Gage 1

Lake St, Clair

Basis of Comparison, 1930-l 960

570 -....-.....-........ :...1.../ .--.-...-.” . . . . . . ---- . . . . . . -- . . . . . . . . . . “.I . . . . . . . . . . . . . . . . ...” . . . ..-...........................--.--..-......

56

?i23d ’ ’ ’ 1935 ’ ’ ’ ’ ’ 1940 ’ ’ ’ ’ ’ 1945 ’ ’ ’ ’1950’ ’ ’ ’ ’ l&d ‘##I

1960

Year

[- Boc Levels ----- Master Gage 1

16
Lake St. Chair

Basis of Comparison, 1930-I 960

3

r 22 0

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..v......* . . . . . . . . . . . . . . . . . . . . I” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

52 200 .._..... . . . . . . . . . . . . . . . . . . . . . . . .. .

ff

g la0

-: 160

#

'%3d ' "id35 ' 194-o """"1945 '

Year

Lake St. Clair

Basis of Comparison, 1960-l 990

.........#............................................... ....”..........”..........-..................

12gj(j ' ' 'I& ' ' '1ghj ' ' 'ld7ff ' ' 'dad ' ' 'l&6 ' ' 'l&o

Year

17
[- BocLevels 

 Master Gage 1

Lake Erie

Basis of Comparison, 1930-l 960

Year

I- BOC Levels ----- Master Gage 1

18

1 -- BOC Levels ----- Master Gage ]

Lake Erie

Basis of Comparison, 1960-l 990

. . . . . . . . . . . . . . . . . . . . . . . ..-....................................................... - . . . . . - . . . . . . . . . . -..- . . . . . . . . “.

Year
YCXU

Lake Erie

“1

Basis of Comparison, 1930-l 960

1

9'93d "'I193tf "Il&o"v"id 'I' I!%0"'r'1956 "I'1980

Year

Lake Erie

Basis of Comparison, 1960-l 990

260

i

................. ................................... ..-. ..... . . ... --- ..... . . _ ..- .....

240 ............................................ h............ ~~~~

... ..... I A. . .. . ...b . .

- ,BOf-!...~..~~~~~.~.-~ . . . .._.........._......._ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..--.....-...--..-...-.....-...................-)

1 .

1 60 - . . . .._.........-

VII

.- .._._..._.” . . . . . .. . . . . . . . . . .. . . . . . .. . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . ..- - . . . . . . . .. . . . . .. . . . . . . . . . . . . .. . . . I.........

1

4p980 tlbtl1963 "I19% I ' '1976

I 1 1 I , I I

' ' 1980 l&xi

I , I

1990

VII”

1 9
- BOO Levels ----- Master Gege 1

Lake Ontario

Basisof Comparison, 1930-l 960

2

4p!93d ’ ’ MS6 ’ ’ ’1946”” ’ 194ff “Il&d ’ ’ ‘l&S ’ ’ ’ 1960’

Year

I- BOO Levels ----- Master Gage 1

Lake Ontario

Basis of Comparison, 1960-l 990

................................................................................................................................

Year

r

-*.

- BOC Levels ----- Master Gage 1

20
Lake Ontario

Basis of Comparison, 1930-I 960

Year

Lake Ontario

Basis of Comparison, 1960-l 990

360 "."..__"......."..~"....."...

t

__....___._..._.__......~~................,.............--..................... -. ._......_._....._.._... __-..

1

~{__......__ ____ _.._._” .._..............*.........................--...............-.-.... .._......._______..... _ . . . . . . .._........................

I

3204 _..._........._......-.__.____ .._.__._____.....___.....~....................”..~.......~~.... _- ..-..... -- . . . . . . . ---....._-.-..‘...-.----..--.-. I

................................

.................I......

..............”.........

..........................“.............................

1

Y!A30

- '1"ldS!i ' ' '1970' ' ' ' '1$i7!i ' ' '1980 ' ' ' ' 'l&i ' ' 'lib0

21
Year

Ogdensburg, New York

Basis of Comparison, 1930-l 960

$

248

J

-..... I . . ...--...” . . . ..-..... - . . . . . . . . . . _ ..-........ _ . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . ..*.............. __.._.-.__ . ..-....-. _ . . . . . . . . . . . . . . . . . ...”

3 246

3

g 244

2

242 . . . . . . . . . . . . . .. . . . . . . -.__._- . .. . . . . _._.- . . . . . . .. . . . - . ...” . . . . . . . . . . . .._......” ._.....” . . . . . . . . . . . . . . ...” . . . .

2

43d”’ 9’ 163s ' ' 'l9'4d ' ' w4!i ' ' 'Kj5(j ' ' ' 1956' ' '

I

1960

Year

Ogdensburg, New York

Basis of Comparison, 1960-I 990

2

4p”““6!Y”““r 960 19 1970 1976 “‘I198d ' ' i9kd ' ' 'lb0

Year

22
Cardinal, Ontario

Basis of Comparison, 1930- 1960

2521

3

e 248 . . . . . . . . . . . . . . . . .._..........................-..........-.........-. " . . . . . . . . ..__....._.....-.....-. - . ..-...-.-..... - . . . . . . . . . . . . . . . . . - . . . . . . . . .

99 246 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..-....-.....-..-.........................................................

2

38k3d ’ ’ ‘1935 ’ ’ ’ ‘19hd ’ ’ ‘Isi&

1 “II’ Ill

' ' 1950 195!.i 1960

Year

Cardinal, Ontario

Basis of Comparison, 1960-i 990

250 . . . . . . . . .._._.........................................~......................................... ” . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . A I. . . .. . . . .. .

i2

r -I

b) 248

II I

. . . . ..-............... _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . * . . . . . .._........ r”..r . . . . . . . . ..-...............*.............. . . . . . ...-..*

; 246

. . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . ..~~......... . . . . . . . . . . . . . . . . . . .

ii:

s &$4-r1. . . . . . . ..__.. x .._..... _ ._.... -.A . . . . . . ..*............. “... #fl/\A . . . . . . . . . . . . . . . . . .

9 I 1 I\. I\

PI I

.. . . .. _. . . . . . . .. . .. . .. . _. . . . . . . . . . . . . . . . . . . . . . . .. . 2401-o! . . . . . . . . . . . . . . . . . f....... ..e..

23fkd”” 9’ l!x!.i ’ ’ ’ 1970' ' ' 'ld76 ' ' ' ' ' ' ' '

I

1980 19186 ' ' 11990

Year

23
Iroquois, Ontario

Basis of Comparison, 1930-I 960

250 J . . .. ._.. .. . .. .... .... . . . . .... ..................-.........................._-........-.._...-...--..._.. . ._.. . ._. . .. _. . .. _._ . ...-.....-. __...__... 23E 248 _..~._...................._.....__.........._......_..........._..._.....__...____.____.__._._.........__..________.____.__._._._.._.______._._.

9p 246 . . . . . . . .._........” . . . . . . . . . . . .._ _ . . . . . . . . . . ..*.............-.-.. _ .~f....1....._........._...~........._.........__ _ ._._.._._..__. ._._*.._.* *.._

I I

2

38'930 ' ' '193s' ' ' ' ' 1!34d ' " 'l&S ' "1950 ' " "19'56 ' ' '1L

Year

Iroquois, Ontario

Basis of Comparison, 1960-I 990

250

23

v ’ ’ ’ ’I& ' ' '197d

ll11 llIlIrII1

1976 - 1980 198s

III

960

Year

24
Morrisburg, Ontario

Basis of Comparison, 19304960

%3d ' ' 'lskd

I I IIlllllI' 11'~ ’ ’ ‘1914d ’ '194!i 1950 1956 1960

Year

Morrisburg, Ontario

Basis of Comparison, 1960-i 990

250a

%6d ' ' 11&!ii ' ' 'l9'rd ' ' 'ld75 ' I ' 1980 ' ' ' ' ' 196' ' ' ' 19Lo

Year

25
Year

Long Sault Dam, New York

Basis of Comparison, 1930-l 960

i2z 246 . ..-......_.....~....-...........~.-......................~.~.~~.-........~~-.....~..................-..............................~

Td&j 1 I ‘,$& I 1 1,&j I 1 I,& 1 1 ‘,&.J I 1

Year

Long Sault Dam, New York

Basis of Comparison, 1960-l 990

250

- .- 3Q) 246 . . . . .

*. .. . . . . . . . . . . . . ...” . ..._” -..........-..-.....” *............ . . . . . ...” . . . . . . . . ..-...-...” . A n

.. . . I . . ...“. 0’ 1 I

.. . . . . . . . . . . . . . . . . . “...fbl .“...“. .

238- . . .*. . . . . . . . . ...* . . .._

V

. . . . . . ..-.--... __ . . . . . . . . . . . . . . . . . . . v._..-........_...... . . . . _."_..

=!I960' ' '1666 "i9'rd "I'1975 “"I1980 ' ' '1!% I1

1

1990

26
Montreal ljarbour, Quebec

Basis of Comparison, 1950-l 990

Year

Lake St. Pierre, Quebec

22

Basis of Comparison, 1950-i 990

iI

-

9

18

c!J

:

I

16

$ 14

3

12

1

?!

r I 1 I

l&O

I I

950 1960 1970 1990

Year

27
APPENDIX B - Basis of Comparison Levels and Flows - TABLES

29
JAN FEB MAR APR MAY JUN JUL AUG SEP 

1900 600.25 600.07

1901 600.67 600.38

1902 600.21 599.98

1903 600.23 599.92

1904 600.20 600.03

1905 600.40 600.16

1906 600.71 600.49

1907 600.39 600.22

1908 600.28 600.08

1909 600.05 599.87

1910 600.36 600.10

1911 599.55 599.36

1912 599.96 599.77

1913 600.04 599.76

1914 600.57 600.30

1915 600.08 599.98

1916 600.78 600.58

1917 600.91 600.61

w

0

1918 600.39 600.23

1919 600.75 600.51

1920 600.23 600.10

1921 600.18 599.89

1922 599.49 599.28

1923 599.57 599.33

1924 599.44 599.20

1925 599.15 598.97

1926 598.96 598.76

1927 599.93 599.78

1928 600.23 600.02

1929 600.89 600.72

1930 600.57 600.39

Basis

599.92 599.90 600.07 600.17 600.38 600.80 601.28 

600.23 600.27 600.42 600.66 600.96 601.09 600.98 

599.86 599.92 600.16 600.45 600.63 600.67 600.69 

599.80 599.99 600.43 600.74 600.84 600.96 601.02 

599.93 599.90 600.18 600.56 600.70 600.85 601.06 

600.15 600.25 600.49 600.81 601.05 601.22 601.36 

600.30 600.31 600.55 600.84 601.00 601.00 601.00 

600.14 600.11 600.34 600.71 600.88 601.09 601.34 

599.93 599.93 600.32 600.82 601.06 601.09 601.01 

599.75 599.74 600.08 600.35 600.57 600.80 600.81 

599.91 599.93 600.08 600.15 600.20 600.31 600.34 

599.18 599.12 599.40 599.84 600.25 q600.54 600.64 

599.69 599.85 600.18 600.45 600.61 600.73 600.80 

599.79 600.01 600.32 600.59 600.81 601.01 601.14 

600.09 600.13 600.44 600.68 600.82 600.91 600.94 

599.74 599.72 599.97 600.34 600.64 600.68 600.82 

600.41 600.65 601.18 601.55 601.66 601.62 601.66 

600.53 600.53 600.62 600.85 601.01 601.12 601.20 

600.05 600.01 600.33 600.70 600.90 601.01 601.02 

600.32 600.34 600.54 600.67 600.73 600.72 600.71 

600.16 600.36 600.54 600.79 601.01 601.05 600.91 

599.79 599.99 600.35 600.51 600.58 600.63 600.58 

599.20 599.38 599.76 600.09 600.33 600.46 600.45 

599.17 599.22 599.38 599.55 599.75 599.90 599.95 

599.01 599.04 599.20 599.30 599.47 599.72 599.91 

598.88 598.97 599.15 599.38 599.61 599.72 599.79 

598.68 598.71 598.87 599.20 599.56 599.83 600.07 

599.81 600.03 600.47 600.86 601.06 601.07 600.95 

599.91 600.05 600.38 600.74 601.02 601.21 601.36 

600.67 600.75 600.86 600.97 601.15 601.23 601.22 

600.23 600.16 600.36 600.72 601.02 601.04 600.95 

of Comparison, IJC Phase II Levels Reference S

Lake Superior Monthly Mean Levels, IGLD 1955
--P

.- / ___

.-. _

W

c,

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1931 600.15 599.86 599.61 599.55 599.73 599.96 600.13 600.16 600.16 60

1932 599.95 599.79 599.65 599.64 599.93 600.17 600.34 600.55 600.46 60

1933 599.64 599.50 599.37 599.43 599.85 600.19 600.31 600.32 600.30 60

1934 599.74 599.60 599.50 599.57 599.86 600.14 600.27 600.32 600.45 60

1935 600.19 600.00 599.92 600.09 600.32 600.56 600.79 600.82 600.67 60

1936 600.06 599.92 599.91 600.03 600.43 600.76 600.69 600.59 600.52 60

1937 599.71 599.67 599.61 599.71 600.12 600.37 600.52 600.66 600.60 60

1938 599.93 599.77 599.74 600.04 600.48 600.83 600.99 601.00 600.98 60

1939 600.33 600.20 600.12 600.21 600.54 600.97 601.19 601.23 601.17 60

1940 600.00 599.77 599.55 599.49 599.82 600.32 600.56 600.52 600.38 60

1941 599.77 599.55 599.37 599.55 599.95 600.21 600.38 600.45 600.64 60

1942 600.24 600.00 599.89 600.00 600.35 600.59 600.66 600.75 600.76 60

1943 600.24 600.06 599.96 600.02 600.38 600.96 601.29 601.33 601.26 60

1944 600.22 599.95 599.78 599.82 600.18 600.69 601.08 601.28 601.33 60

1945 600.33 600.19 600.28 600.55 600.75 600.83 600.91 601.01 601.05 60

1946 600.32 600.17 600.16 600.26 600.39 600.60 600.75 600.76 600.80 60

1947 600.24 599.98 599.79 599.93 600.35 600.87 601.14 601.14 601.13 60

1948 600.17 599.91 599.77 600.07 600.40 600.44 600.52 600.65 600.62 60

1949 599.94 599.76 599.62 599.67 599.95 600.29 600.58 600.66 600.52 60

1950 599.91 599.73 599.63 599.76 600.30 600.90 601.19 601.31 601.28 60

1951 600.71 600.56 600.57 600.80 601.17 601.40 601.49 601.55 601.68 60

1952 601.20 600.97 600.77 600.87 601.04 601.21 601.60 601.82 601.70 60

1953 600.54 600.38 600.30 600.41 600.79 601.24 601.53 601.62 601.52 60

1954 600.52 600.33 600.17 600.30 600.79 601.19 601.31 601.21 601.11 60

1955 600.31 600.11 600.03 600.20 600.49 600.62 600.73 600.86 600.85 60

1956 600.25 600.01 599.76 599.74 600.04 600.33 600.54 600.68 600.64 60

1957 599.88 599.66 599.61 599.79 600.07 600.31 600.51 600.53 600.47 60

1958 599.87 599.70 599.54 599.54 599.66 599.86 600.14 600.31 600.37 60

1959 599.67 599.46 599.35 599.40 599.75 600.13 600.27 600.48 600.73 60

1960 599.99 599.77 599.57 599.76 600.31 600.65 600.74 600.79 600.76 60

Basis of Comparison, IJC Phase I

Lake Superior Monthly Mean

I Levels Refe rence Stud

Levels, IGLD 1955
-.-____-- 1 _---- . .---~--.-.---- -

-m-m.--- ---~..-----_-_

1961

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

K 1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

--------- ---------

Average

Std.Dev

Maximum

Minimum

Basis of Comparison, IJC Phase II Level s Reference S

Lake Supe rior Mont1 ly Mea n Levels , IGLD 1955

600.00 599.85 599.83 599.92 600.14 600.34 600.41 600.37 600.36 

599.86 599.69 599.64 599.65 599.95 600.23 600.29 600.37 600.43 

599.54 599.38 599.32 599.47 599.70 600.00 600.22 600.26 600.24 

599.42 599.23 599.05 599.21 599.73 600.19 600.37 600.49 600.60 

599.93 599.74 599.66 599.77 600.18 600.53 600.63 600.66 600.71 

600.40 600.20 600.16 600.30 600.53 600.66 600.67 600.76 600.70 

600.07 599.92 599.82 600.05 600.35 600.53 600.69 600.74 600.64 

599.95 599.74 599.69 599.98 600.34 600.70 601.15 601.43 601.60 

601.16 601.03 600.82 600.90 601.16 601.24 601.26 601.31 601.23 

600.35 600.17 600.00 600.08 600.51 600.84 601.02 601.08 601.03 

600.76 600.60 600.57 600.67 601.01 601.29 601.38 601.38 601.33 

600.92 600.73 600.63 600.74 600.98 601.14 601.27 601.54 601.69 

600.85 600.62 600.61 600.75 601.00 601.27 601.41 601.55 601.55 

600.83 600.64 600.46 600.55 600.87 601.18 601.42 601.57 601.57 

601.02 6uu.88 600.70 600.63 600.82 601.13 601.30 601.26 601.18 

600.72 600.52 600.48 600.68 600.84 600.97 601.11 601.04 600.81 

599.66 599.52 599.62 599.88 600.03 600.16 600.37 600.59 600.95 

600.66 600.36 600.16 600.12 600.31 600.57 600.79 601.02 601.12 

600.20 600.04 600.13 600.43 600.87 601.31 601.50 601.44 601.35 

600.82 600.62 600.39 600.39 600.55 600.66 600.77 600.92 601.10 

600.29 600.19 600.21 600.39 600.63 600.89 601.05 600.97 600.83 

600.13 599.89 599.79 599.94 600.33 600.57 600.80 601.04 601.11 

601.15 600.92 600.78 600.85 601.06 601.21 601.31 601.36 601.33 

600.89 600.71 600.60 600.66 600.83 601.11 601.38 601.45 601.44 

600.85 600.65 600.58 600.72 601.02 601.22 601.34 601.47 601.62 

601.47 601.24 601.18 601.38 601.56 601.60 601.72 601.75 601.73 

600.97 600.75 600.58 600.48 600.55 600.66 600.80 600.93 600.86 

600.16 599.92 599.79 599.88 600.06 600.18 600.22 600.47 600.69 

600.47 600.26 600.11 600.20 600.49 600.82 600.90 600.86 600.75 

SEP 

600.25 600.06 599.95

0.48 0.47 0.47

601.47 601.24 601.18

598.96 598.76 598.68

600.05 600.33 600.61 600.79 600.88 600.90 

0.48 0.48 0.47 0.47 0.45 0.44 

601.38 601.56 601.60 601.72 601.82 601.73 

598.71 598.87 599.20 599.47 599.72 599.79 
1900 76.80 73.50 70.60 70.10 73.30 75.30 68.60 75.80 94.20 1

1901 84.20 79.00 76.20 76.90 79.40 93.10 98.80 99.20 87.50 

1902 76.00 71.80 69.70 70.40 74.70 80.30 87.20 77.10 72.70 

1903 76.40 70.60 55.90 71.70 79.90 106.80 93.40 93.70 87.50 

1904 74.20 72.60 70.80 70.10 67.70 76.60 77.20 69.10 76.10 

1905 79.50 74.90 74.70 76.60 80.70 93.40 93.80 94.10 94.40 

1906 84.20 81.20 77.50 77.70 92.90 93.40 98.90 87.50 81.20 

1907 75.70 76.00 74.60 74.00 77.60 87.20 87.40 81.70 94.40 

1908 70.70 73.20 70.80 70.80 71.20 87.30 93.80 87.60 79.20 

1909 66.60 57.90 61.50 58.40 71.10 78.60 67.30 80.80 77.40 

1910 78.80 73.70 70.20 70.60 73.30 73.90 65.40 60.90 62.50 

1911 55.00 55.00 55.00 55.00 55.00 55.00 68.40 84.20 87.20 

1912 65.20 61.50 60.70 64.10 75.10 80.50 87.10 77.30 77.00 

1913 64.20 55.00 55.00 72.40 75.40 78.50 75.10 81.80 79.90 

1914 84.20 77.50 73.70 74.40 79.90 93.20 87.30 84.30 79.10 

1915 59.50 69.90 67.60 55.10 71.30 78.40 97.90 87.20 78.80 

1916 84.20 84.20 79.50 84.20 113.20 129.80 135.70 122.60 111.10 1

1917 84.30 84.20 84.10 84.10 93.00 87.40 83.70 72.60 74.70 

1918 66.20 70.70 72.60 64.60 67.00 72.40 78.60 74.90 73.90 

1919 83.90 84.10 77.90 78.20 87.10 77.60 73.00 65.70 59.10 

1920 62.60 73.80 74.90 78.80 92.90 93.40 93.70 87.50 80.30 

1921 71.20 64.80 55.00 65.10 78.40 81.40 76.40 76.20 67.10 

1922 55.00 55.00 55.00 55.00 55.00 57.00 58.60 57.80 56.20 

1923 55.00 55.00 55.00 55.00 55.00 55.00 55.00 55.00 55.00 

1924 55.00 55.00 55.00 55.00 55.00 55.00 55.00 55.00 55.00 

1925 55.00 54.50 53.00 54.50 55.00 55.00 55.00 55.00 55.00 

1926 54.30 50.90 49.60 50.10 52.80 55.00 55.00 55.00 64.10 

1927 71.00 68.10 68.60 72.40 80.30 107.30 120.50 118.60 103.70 

1928 76.20 72.60 70.20 72.80 78.80 98.20 104.00 99.50 99.90 1

1929 84.30 84.20 84.20 84.20 98.60 79.40 72.80 77.70 65.00 

1930 73.10 73.60 76.00 74.50 72.80 74.70 84.30 83.70 70.50 

1931 71.70 65.90 56.90 55.00 55.00 71.30 71.30 70.30 64.80 

JAN FEB MAR APR MAY JUN JUL AUG SEE' 

Basis 0 f Comparison, IJC Phase II Levels Reference Stu

Lake Superior Mon thly Mean Outflows, TCFS
of Comparison, IJC Phase II Levels Reference

Lake Superior Mon thly Mean Outflows, TCFS

Stu

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 71.30 65.10 64.00 64.10 65.50 74.70 78.20 87.10 80.50 

1933 58.90 60.00 61.20 62.10 63.50 75.30 77.70 77.90 76.00 

1934 66.00 64.90 63.20 64.30 69.70 74.20 76.60 77.50 80.10 

1935 75.50 71.80 70.40 73.70 77.30 106.00 118.40 116.80 106.50 

1936 73.10 70.40 70.20 72.40 79.40 106.90 122.20 102.40 97.60

1937

65.20 66.30 65.10 66.70 73.80 78.40 97.60 102.60 97.80 

1938 71.00 67.90 67.60 71.00 80.70 107.20 115.20 103.90 98.90 

1939 78.10 75.70 74.00 75.80 102.20 115.10 121.50 113.50 104.50 

1940 69.90 67.90 63.90 63.20 61.50 77.90 97.80 92.90 73.50

1941

57.80 55.00 55.40 55.00 71.00 75.50 78.80 80.30 87.20 

1942 76.40 72.00 70.20 72.00 78.10 102.40 87.20 84.20 84.20 

1943 76.10 72.90 71.30 72.20 79.00 93.70 109.40 99.80 87.70 

1944 68.10 69.50 68.10 55.00 75.00 87.20 99.10 104.90 105.20

194578.10 75.50 77.10 84.20 113.70 107.20 93.60 87.50 87.50 

1946 72.40 75.10 74.90 76.80 79.00 84.20 84.20 80.20 73.70 

1947 76.40 71.80 68.50 63.90 78.20 93.50 108.60 94.00 87.60 

1948 74.10 68.90 56.10 66.40 79.20 80.30 74.80 71.50 75.90 

1949 61.70 62.80 58.70 60.50 61.80 77.30 93.00 93.10 84.10 

1950 70.40 67.20 64.50 67.30 77.50 107.50 121.50 117.20 109.40 

1951 84.20 84.20 84.20 84.20 113.10 126.90 134.10 106.00 111.20 3

1952 84.40 84.30 84.20 84.30 112.30 87.70 94.80 120.60 111.30 

1953 66.00 71.90 76.10 79.70 87.30 99.60 110.50 122.70 110.50 

1954 80.00 78.20 75.10 77.50 98.30 108.90 109.40 94.10 80.80 

1955 58.10 60.40 66.20 74.40 81.00 81.80 74.90 75.90 77.30 

1956 75.60 72.00 66.20 57.40 72.80 78.20 77.20 79.90 70.40 

1957 62.40 55.00 58.80 63.20 72.90 77.70 81.40 81.90 73.80 

1958 57.80 59.10 60.20 61.20 61.50 58.90 74.60 77.70 78.80 

1959 66.20 62.70 60.60 61.50 63.40 74.00 76.60 81.00 98.20 

1960 70.90 66.50 59.70 59.70 77.70 98.00 87.30 78.40 71.50 

1961 60.50 60.70 67.00 70.40 74.40 78.10 79.50 75.00 63.40 
.

__.. _ 

._

-- .---- ---. . _ - _?_ __ _--- -- .- - .~- -_. ._._ _.__._

1962 62.20 55.00 60.80 60.70 58.80 76.00 77.30

1963 55.20 61.30 60.30 62.90 66.70 65.30 75.80

1964 62.00 58.60 55.50 58.10 67.00 74.90 78.40

1965 70.60 67.20 65.60 67.80 74.90 81.40 110.00

1966 79.50 75.70 74.90 77.50 105.90 120.70 106.50

1967 73.30 70.60 68.80 72.90 77.90 97.70 93.20

1968 57.00 56.10 55.00 63.40 78.10 93.20 108.70

1969 84.40 84.30 84.30 84.30 113.10 123.70 104.90

1970 69.20 75.30 72.00 73.50 92.80 98.50 93.80

1971 84.20 84.20 84.20 84.20 108.00 113.80 109.80

1972 84.30 84.20 84.20 84.20 112.00 108.60 99.70

1973 76.90 74.70 78.50 84.20 93.70 104.90 100.00

Et 1974 69.40 70.90 74.40 74.50 87.40 94.10 105.50

1975 80.50 84.30 84.20 84.20 84.30 84.40 87.80

1976 73.00 78.10 77.60 83.40 98.50 74.20 78.30

1977 55.00 55.00 55.00 62.20 72.80 66.10 65.70

1978 84.20 78.60 74.90 74.20 77.70 82.40 82.80

1979 67.60 68.50 74.60 80.10 98.60 109.50 115.00

1980 80.00 84.20 79.20 79.20 87.10 79.10 71.90

1981 65.20 68.10 75.80 79.40 97.90 87.40 99.00

1982 61.00 60.10 55.00 61.50 75.80 87.10 74.90

1983 84.40 84.30 84.20 84.30 112.40 99.50 94.30

1984 84.30 84.20 84.20 84.20 103.30 87.60 99.90

1985 76.00 78.10 79.00 81.40 93.80 104.70 94.40

1986 84.50 84.40 84.40 84.50 110.60 128.70 119.90

1987 61.50 68.30 74.70 79.10 71.70 70.40 62.70

1988 55.00 57.50 55.00 59.00 65.40 63.90 60.60

1989 80.80 76.80 74.00 75.50 80.80 103.20 103.50

---------- _--------- ______------------------------- _______------------------------ .--w------H------ .----------------.-------

Average 71.13 70.05 68.94 70.58 80.40 87.30 89.45

Std.Dev 9.55 9.43 9.64 9.66 15.92 17.62 18.55

Maximum 84.50 84.40 84.40 84.50 113.70 129.80 135.70

Minimum 54.30 50.90 49.60 50.10 52.80 55.00 55.00

Basis of Comparison, IJC Phase II Levels Reference

Lake Superior Monthly Mean Outflows, TCFS

S

JAN FEB MAR APR MAY JUN JUL AUG SEP 

75.30 76.40 

76.60 76.40 

80.50 102.40 

115.70 106.70 

98.30 102.80 

87.30 84.20 

118.00 110.80 

94.30 94.10 

93.90 80.80 

99.90 87.80 

100.40 111.30 

94.70 94.80 

1;;.;;- 100.50 

71:oo

65.10 

57.70 

70.70 72.10 

84.30 87.60 

121.30 82.70 

67.30 67.30 

83.70 70.70 

87.50 81.60 

87.80 82.30 

94.60 87.90 

94.60 94.90 

116.50 95.10 

69.20 61.70 

55.00 76.10 

87.40 83.70 

___-_-_-----------

_____-__----------

87.11 83.39 

16.90 15.15 

122.70 111.30 

55.00 55.00 
Basis of Comparison, IJC Phase II Levels Reference 

Lakes Michigan-Huron Monthly Mean Levels, IGLD 1

1900 577.82 577.77 577.79 577.88 578.08 578.19 578.38

1901 577.87 577.72

578.54 578.53 

577.83 578.13 578.35 578.52 578.70

1902 577.57 577.40

578.77 578.55 

577.45 577.64 577.88 578.18 578.53

1903 577.52 577.54

578.58 578.39 

577.75 578.02 578.28 578.49 578.61

1904 577.88 577.84

578.65 578.69 

578.05 578.48 578.95 579.28 579.36

1905 578.07 577.95

579.30 579.17 

578.08 578.29 578.60 579.02 579.27

1906 578.43 578.53

579.30 579.18 

578.57 578.73 578.98 579.18 579.27

1907 578.37 578.39

579.14 578.92 

578.43 578.61 578.86 579.12 579.27

1908 578.26 578.18

579.23 579.12 

578.30 578.59 579.04 579.38 579.53

1909 577.70 577.65

579.43 579.07 

577.67 577.95 578.45 578.78 578.87

1910 577.83 577.75

578.77 578.57 

577.75 577.99 578.26 578.36 578.32

1911 577.11 577.06

578.21 578.07 

577.03 577.18 577.50 577.73 577.72

1912 577.31 577.24

577.60 577.52 

577.20 577.38 577.96 578.41 578.53

1913 578.18 578.08

578.64 578.69 

578.17 578.61 579.11 579.35 579.41

1914 578.29 578.22

579.33 579.09 

578.21 578.32 578.53 578.82 578.98

1915 577.65 577.66

578.93 578.77 

577.64 577.60 577.70 577.89 578.06

1916

578.13 578.14 

577.60 577.67 577.77 578.20 578.80 579.33 579.61

1917 578.80 578.66

579.53 579.31 

578.68 578.97 579.29 579.70 580.09

1918 578.78 578.82

580.08 579.82 

579.03 579.27 579.61 579.84 579.83

1919 578.93 578.79

579.71 579.43 

578.87 579.20 579.59 579.75 579.68

1920

579.48 579.19 

578.35 578.18 578.32 578.70 578.94 579.09 579.24

1921 578.22 578.09

579.21 579.09 

578.14 578.55 578.84 578.88 578.81

1922

578.68 578.54 

577.74 577.67 577.82 578.26 578.72 578.93 579.07

1923

578.99 578.73 

577.43 577.24 577.24 577.51 577.88 578.14 578.18 578.07 577.92 

1924 576.96 576.85 576.93 577.15 577.46 577.71 577.84

1925

577.94 577.88 

576.52 576.41 576.48 576.59 576.57 576.61 576.70 576.57 576.30 

1926 575.48 575.41 575.44 575.68 576.02 576.34 576.53 576.53 576.49 

1927 576.45 576.45 576.60 576.86 577.25 577.60 577.79

1928

577.76 577.62 

577.25 577.23 577.33 577.73 578.19 578.53 578.80

1929 578.96 578.92

578.92 578.88 

579.07 579.65 580.31 580.68 580.73

1930

580.56 580.22 

579.01 579.06 579.15 579.26 579.45 579.68 579.80

1931 577.82 577.57

579.65 579.27 

577.45 577.46 577.53 577.65 577.64 577.42 577.29 

JAN FEB MAR APR MAY JUN JUL AUG SEP 
__--__.._----_- .-- --r--~__ll_-l___I--------.___l--__l__

Basis of Comparison, IJC Phase II Levels Reference St

Lakes Michigan-1luron Monthly Mean Levels, IGLD 195

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 576.93 577.04 576.97 576.99 577.20 577.35 577.38 577.34 577.13 

1933 576.47 576.41 576.37 576.62 577.15 577.47 577.50 577.31 577.02 

1934 576.25 576.12 576.03 576.24 576.47 576.59 576.61 576.43 576.34 

1935 576.09 576.07 576.21 576.39 576.51 576.74 576.97 576.96 576.83 

1936 576.19 576.20 576.28 576.47 576.74 576.95 576.97 576.94 576.93 

1937 576.28 576.32 576.30 576.48 576.85 577.06 577.16 577.15 577.04 

1938 576.39 576.58 576.95 577.33 577.64 577.93 578.11 578.13 578.05 

1939 577.16 577.13 577.19 577.42 577.79 578.14 578.33 578.34 578.21 

1940 577.08 576.89 576.75 576.78 577.06 577.41 577.62 577.70 577.67 

1941 577.09 577.00 576.85 576.96 577.20 577.29 577.29 577.15 577.06 

1942 577.20 577.11 577.24 577.54 577.88 578.25 578.41 578.28 578.10 

1943 577.64 577.67 577.87 578.17 578.59 579.17 579.55 579.59 579.40 

1944 578.27 578.14 578.12 578.21 578.38 578.65 578.80 578.68 578.55 

1945 577.62 577.50 577.59 577.85 578.22 578.68 578.93 578.89 578.78 

1946 578.25 578.26 578.44 578.63 578.75 578.93 578.96 578.76 578.48 

1947 577.49 577.40 577.35 577.70 578.35 578.84 579.10 579.10 578.97 

1948 577.84 577.73 577.89 578.25 578.55 578.73 578.74 578.57 578.23 

1949 577.25 577.24 577.21 577.31 577.48 577.67 577.84 577.71 577.39 

1950 576.56 576.67 576.80 577.17 577.56 577.84 578.11 578.19 578.12 

1951 577.57 577.66 577.87 578.43 578.95 579.18 579.46 579.60 579.51 

1952 579.45 579.50 579.56 579.90 580.28 580.44 580.61 580.70 580.49 

1953 579.19 579.10 579.18 579.43 579.67 579.90 580.04 580.01 579.78 5

1954 578.41 578.32 578.40 578.69 579.06 579.42 579.65 579.56 579.42 

1955 579.06 578.90 578.86 579.08 579.33 579.39 579.31 579.07 578.66 

1956 577.64 577.53 577.53 577.71 578.07 578.38 578.51 578.59 578.42 

1957 577.30 577.14 577.10 577.23 577.52 577.81 578.03 577.99 577.77 

1958 577.21 577.06 576.94 576.96 576.95 576.94 577.01 576.97 576.84 

1959 575.88 575.84 575.95 576.34 576.81 576.99 577.00 577.07 577.10 

1960 577.08 577.10 577.08 577.36 578.09 578.66 578.92 578.97 578.80 

1961 577.57 577.40 577.43 577.61 577.77 577.90 578.01 577.97 577.93 
Basis of Comparison, IJC Phase II Levels Reference 

Lakes Michigan-Huron Monthly Mean Levels, IGLD 19

1962 577.18 577.13 577.18 577.36

1963 576.24 576.08 576.15 576.39

1964 575.53 575.36 575.26 575.40

1965 575.13 575.16 575.25 575.61

1966 576.65 576.62 576.81 577.08

1967 576.86 576.85 576.89 577.31

1968 577.65 577.56 577.55 577.71

1969 578.07 578.05 578.04 578.28

1970 578.38 578.23 578.15 578.33

1971 578.68 578.66 578.80 579.11

1972 578.82 578.67 578.69 578.99

1973 579.66 579.63 579.81 580.21

1974 579.90 579.89 579.92 580.21

1975 579.69 579.67 579.77 579.98

1976 579.29 579.27 579.65 580.13

1977 578.11 577.96 578.18 578.50

1978 578.33 578.23 578.16 578.35

1979 578.24 578.16 578.38 578.95

1980 579.19 579.09 579.01 579.22

1981 578.58 578.57 578.65 578.88

1982 578.45 578 -29 578.30 578.62

1983 579.09 579.04 579.11 579.36

1984 579.13 579.12 579.23 579.43

1985 579.63 579.65 579.96 580.50

1986 580.47 580.35 580.45 580.71

1987 580.61 580.35 580.22 580.23

1988 578.87 578.72 578.66 578.85

1989 578.02 577.87 577.87 578.08

--------- ---------.--------.-------- ---------------- ----------------

Average 577.83 577.77 577.83 578.08

Std.Dev 1.11 1.10 1.12 1.15

Maximum 580.61 580.35 580.45 580.71

Minimum 575.13 575.16 575.25 575.40

JAN FEB MAR APR MAY JUN JUL AUG SEP 

577.59 577.74 577.73

576.63 576.76 576.78

575.68 575.83 575.89

576.08 576.30 576.34

577.27 577.43 577.46

577.73 578.07 578.29

577.95 578.23 578.44

578.72 579.19 579.53

578.69 579.00 579.24

579.43 579.62 579.72

579.40 579.64 579.80

580.64 581.03 581.13

580.60 580.90 581.04

580.28 580.52 580.58

580.46 580.62 580.59

578.59 578.57 578.55

578.71 578.92 578.99

579.46 579.78 579.90

579.52 579.69 579.79

579.17 579.35 579.43

578.91 579.09 579.20

579.84 580.22 580.24

579.74 580.02 580.15

580.91 581.00 580.96

580.92 581.12 581.33

580.25 580.22 580.10

579.02 578.91 578.73

578.29 578.56 578.67

.--------------a- .---------------_.--------

578.40 578.65 578.76

1.17 1.18 1.19

580.92 581.12 581.33

575.68 575.83 575.89

577.64 577.46 

576.75 576.60 

575.87 575.78 

576.39 576.56 

577.35 577.10 

578.20 578.00 

578.53 578.59 

579.54 579.24 

579.22 579.15 

579.67 579.50 

579.99 580.07 

581.08 580.86 

580.96 580.70 

580.48 580.27 

580.34 579.90 

578.55 578.57 

578.99 578.99 

579.96 579.82 

579.78 579.65 

579.40 579.28 

579.19 579.08 

580.10 579.90 

580.10 579.95 

580.91 580.83 

581.30 581.41 

579.93 579.76 

578.53 578.30 

578.53 578.25 

----------------

---------------

578.72 578.57 

1.18 1.16 

581.30 581.41 

575.87 575.78 
. - _ _” ._--.___.

Basis of Compa rison

La kes Mich igan- II

IJC Phase I I Levels Reference S

uron Monthly Mean Outflows, TCFS

t

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1900 172.00 171.40 177.70 180.50 184.60 187.70 192.60 196.40 199.30 

1901 172.10 170.40 184.60 193.50 196.70 197.60 200.50 203.70 200.70 

1902 169.10 168.80 180.70 185.70 187.50 191.30 191.60 194.10 193.90 1

1903 160.70 164.50 173.70 177.60 183.50 189.10 191.90 196.00 198.30 2

1904 171.90 168.70 180.90 183.90 194.10 201.80 204.60 206.10 206.00 

1905 173.00 171.20 184.50 192.10 194.10 198.70 203.90 206.60 206.80 2

1906 179.20 185.20 195.90 202.00 203.40 206.10 207.60 205.80 203.80 

1907 166.50 173.80 187.40 191.90 196.30 200.90 203.60 204.80 205.30 

1908 169.20 168.80 178.30 185.10 193.70 202.40 208.30 207.60 204.90 1

1909 167.70 168.10 177.10 181.80 187.00 193.20 197.30 197.80 197.50 1

1910 167.10 171.80 180.10 184.40 186.40 189.30 191.30 190.30 189.90 1

1911 160.00 158.70 170.70 174.20 179.00 183.40 185.20 184.20 183.70 

1912 159.90 163.30 171.70 170.60 180.00 189.90 193.50 196.80 197.90 1

1913 171.20 170.70 182.00 177.60 191.20 200.50 204.90 206.40 205.30 

1914 173.70 176.80 189.70 191.20 188.30 194.80 200.30 200.80 199.40 1

1915 168.30 167.00 181.20 183.00 182.70 186.60 188.20 187.10 188.60 1

1916 159.40 163.20 179.00 185.00 192.70 203.10 209.70 210.40 210.10 2

1917 186.80 186.90 197.90 198.40 201.70 208.00 214.40 216.30 215.00 

1918 181.40 185.40 199.90 202.70 212.20 217.70 217.50 216.40 211.40 

1919 183.70 187.30 196.10 201.00 205.00 208.80 210.90 208.10 204.80 

1920 179.70 179.30 192.80 199.50 201.90 203.70 206.10 206.10 206.50 

1921 174.40 177.10 182.50 190.30 195.80 197.70 197.80 198.00 197.60 1

1922 164.70 169.70 181.20 188.40 196.30 198.60 203.00 203.40 199.80 

1923 161.60 164.00 173.00 178.90 184.70 188.30 190.10 190.70 189.70 

1924 152.40 155.20 167.90 171.90 174.70 178.70 180.80 185.60 186.90 1

1925 148.00 151.60 159.20 166.00 166.70 167.10 169.70 167.90 164.00 1

1926 136.80 139.90 148.60 151.40 156.60 164.00 167.70 167.20 165.60 

1927 147.40 150.70 161.20 166.20 172.80 178.80 182.60 184.00 183.90 1

1928 151.60 154.00 171.20 182.40 189.80 194.40 197.70 201.20 203.90 2

1929 185.20 187.90 197.90 203.60 213.60 224.20 226.00 226.90 223.60 2

1930 174.40 181.10 192.10 195.00 200.60 208.70 213.10 213.70 208.60 2

1931 169.00 167.80 177.00 177.00 178.70 180.60 180.60 178.50 178.30 1
___ ._-.- _ .- __.-. - _l_l ____ ___-____---.-c-_------_-..-.-

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

1949

%

1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961

JAN FEB

153.00 154.50 167.40 170.00 170.50 174.80

146.70

176.20

146.30 157.30 160.60 168.50 174.50 178.70

147.40 150.10 158.00 162.40 167.10 169.90

148.00

170.80

151.00 164.80 169.50 168.30 173.50

149.70

176.60

154.80 165.10 167.50 171.20 175.40

146.20

176.70

145.30 157.80 159.10 163.40 167.70

148.70

167.50

151.50 164.40 172.30 178.90 185.00

162.20

188.60

163.00 171.10 174.20 181.60 189.10

160.30

193.60

161.80 168.90 167.50 170.30 174.60

154.40 158.50

179.20

168.90 172.90 176.40 177.50

164.60

178.30

164.30 174.60 176.80 182.80 188.20

159.60

192.40

166.50 177.20 186.10 185.00 194.90

177.00

203.00

178.50 186.60 185.30 185.40 190.70

167.00

196.20

170.30 177.30 180.10 182.90 190.40

171.20

195.30

176.50 189.20 197.30 198.90 198.00

162.30

198.70

164.10 174.50 171.20 181.30 186.90

164.80

195.10

168.00 176.80 183.20 185.00 190.50

155.50

192.10

155.10 166.80 170.50 174.40 179.20

141.10

183.80

141.60 153.70 156.60 168.30 176.60

158.00

184.20

160.40 171.00 182.70 193.50 198.50

187.90

205.90

188.40 199.10 207.20 216.30 220.90

189.30

226.70

190.10 200.50 207.30 211.00 213.80 217.80

179.60 176.80 185.30 189.20 196.30 205.50

180.70

212.60

183.40 187.60 194.90 200.80 204.00

164.90

204.40

168.50 171.90 174.60 171.90 181.80 186.70

158.90 159.10 167.60 167.80 171.00 178.30 179.50

158.50 159.10 166.50 171.60 169.20 168.80 168.70

140.30 138.40 145.20 153.60 161.60 167.20 170.10

153.90 156.80 167.50 170.00 185.10 194.20

167.70

200.80

167.00 174.40 176.20 173.90 178.10 182.20

Basis of Compa rison, IJC Phase I

La kes Mich igan-Hu

I Levels Reference S

ron Monthly Mean Outflows, TCFS

MAR APR MAY JUN JUL AUG SEP 

177.60 176.00 

178.00 175.90 

169.00 168.70 

176.00 176.40 

178.00 178.20 

169.70 172.90 

189.70 190.90 

195.30 194.80 

183.00 183.30 

177.90 178.30 

190.90 189.60 

207.70 207.80 

197.50 197.40 

197.50 197.90 

197.70 196.50 

197.60 198.10 

192.20 189.10 

183.90 180.60

189.10 188.60 

211.90 213.10 

230.90 228.20 

219.40 218.10 

213.50 212.30 

202.10 195.50 

188.70 188.10 

182.90 181.20 

168.80 168.50 

173.70 177.10 

202.50 201.50 

182.50 184.20 
Basis of Comparison, IJC Phase II Levels Reference S

Lakes Michigan-Huron Monthly Mean Outflows, TCFS

1962 161.50 163.40 170.10 176.40 181.60 183.90 185.20 184.50 183.60 

1963 146.70 149.00 157.10 160.30 165.10 168.20 170.70 171.70 171.30 

1964 139.20 139.40 145.50 147.50 150.90 154.70 157.00 158.10 158.80 

1965 132.50 133.00 141.30 148.70 158.10 163.10 164.90 167.10 171.50 

1966 153.50 156.00 167.20 173.80 175.90 178.20 179.80 178.60 176.10 

1967 152.20 155.80 165.50 172.50 180.30 186.40 191.00 191.00 189.70 

1968 162.00 157.90 170.70 176.40 181.80 185.20 189.80 193.10 197.30 

1969 168.20 167.10 180.80 184.10 189.50 197.50 203.80 206.30 205.10 

1970 176.80 176.00 183.50 187.10 193.90 199.90 204.70 206.00 207.00 

1971 180.40 182.40 190.80 201.20 209.30 211.80 215.70 216.00 212.20 

1972 180.90 182.90 189.40 195.50 202.20 207.60 209.90 215.70 219.40 

1973 187.10 191.30 199.70 210.80 221.10 227.20 231.00 232.80 231.60 

1974 192.60 193.90 200.90 208.90 217.60 225.80 231.10 232.40 230.80 

1975 189.90 191.50 200.60 208.20 216.80 221.20 224.50 223.10 217.90 

1976 184.40 182.50 190.70 208.30 215.80 222.20 220.80 218.50 213.60 

1977 164.10 167.70 177.80 185.20 186.30 188.80 188.40 190.30 189.50 

1978 165.90 167.90 176.10 174.70 185.20 191.40 196.20 198.90 201.80 

1979 172.70 174.60 183.30 191.10 203.20 210.40 213.50 216.50 213.70 

1980 182.10 186.80 192.70 194.80 202.10 205.30 208.20 207.30 206.50 

1981 178.50 177.90 189.80 196.50 200.50 202.40 203.20 204.30 201.90 

1982 171.60 171.40 173.40 179.80 191.00 194.20 198.60 202.20 203.20 

1983 181.00 184.30 197.60 201.80 207.40 216.80 217.70 214.50 214.60 

1984 180.80 180.60 190.70 196.50 203.50 207.90 214.10 215.40 215.10 

1985 191.00 194.00 201.60 214.10 227.30 230.40 230.20 231.80 231.70 

1986 202.60 201.10 208.60 219.50 224.90 226.50 232.30 234.60 240.00 

1987 202.70 202.90 210.80 212.40 215.30 216.30 213.50 212.80 211.10 

1988 179.70 179.80 187.80 194.50 199.50 199.90 198.00 195.40 193.70 

1989 169.90 170.40 181.00 184.30 187.60 187.10 190.90 191.50 188.20 

--------- ---s-m---._------- _-------- ____________________-----------------------------------------------

Average 166.98 168.57 178.40 183.29 188.63 193.49 196.67 197.72 197.07 

Std.Dev 14.80 14.75 14.61 15.77 16.55 16.72 16.99 17.11 16.75 

Maximum 202.70 202.90 210.80 219.50 227.30 230.40 232.30 234.60 240.00 

Minimum 132.50 133.00 141.30 147.50 150.90 154.70 157.00 158.10 158.80 

JAN FEB MAR APR MAY JUN JUL AUG SEP 
of Compa rison, IJC Phase II Levels Reference

Lake St. Clair Monthly Mean Levels, IGLD 1955

1900

1901

1902

1903

1904

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

i%

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

JAN FEB MAR APR MAY JUN JUL AUG SEP 

572.86 573.04 573.46 573.69 573.78 573.78 573.78 573.82 573.60 

572.97 573.02 573.06 573.26 573.44 573.70 573.82 573.74 573.54 

572.61 572.54 572.65 572.92 573.23 573.52 574.11 574.05 573.71 

573.13 573.11 573.64 574.10 574.18 574.20 574.23 574.04 573.95 

572.99 573.35 573.70 574.48 574.68 574.78 574.75 574.55 574.32 

573.26 573.38 573.52 573.66 574.08 574.51 574.64 574.52 574.28 

573.49 573.45 573.63 573.79

574.21 573.98

574.14 574.34 574.40 574.28 574.01 

573.95 574.23 574.39 574.56 574.66 574.51 574.28 

573.85 573.93 574.29 574.60 574.84 574.92 574.81 574.68 574.20 

572.96 573.05 573.29 573.73 574.27 574.45 574.35 574.14 573.80 

573.23 572.97 573.23 573.64 573.98 573.96 573.77 573.63 573.41 

572.44 572.66 572.61 572.90 573.14 573.24 573.10 572.96 572.84 

572.80 572.65 572.84 573.46 573.87 574.01 574.00 573.98 573.99 

573.59 573.64 573.84 575.03 575.10 574.98 574.82 574.58 574.22 

573.62 573.48 573.40 573.78 574.32 574.42 574.34 574.23 574.02 

572.82 573.14 572.95 573.04 573.25 573.32 573.51 573.70 573.63 

573.35 573.42 573.35 573.95 574.52 574.78 574.87 574.68 574.31 

573.63 573.59 573.70 574.44 574.80 575.14 575.43 575.30 574.92 

573.98 573.99 574.20 574.71 574.70 574.77 574.76 574.62 574.44 

574.10 573.80 574.17 574.70 575.11 575.17 574.93 574.74 574.43 

573.31 573.22 573.39 573.89 574.17 574.33 574.43 574.39 574.14 

573.43 573.23 573..76 574.22 574.39 574.33 574.21 573.96 573.73 

573.25 572.98 573.28 573.85 574.15 574.36 574.33 574.16 573.94 

572.90 572.61 572.82 573.16 573.42 573.64 573.59 573.35 573.16 

572.70 572.53 572.63 573.00 573.34 573.52 573.60 573.47 573.28 

572.24 572.00 572.42 572.43 572.36 572.40 572.37 572.26 572.06 

571.21 571.07 571.38 571.87 572.10 572.14 572.20 572.25 572.29 

572.17 572.14 572.50 572.89 573.11 573.32 573.41 573.26 573.01 

573.25 573.26 573.10 573.31 573.63 573.93 574.19 574.17 573.92 

574.05 574.00 574.40 575.30 575.85 575.88 575.86 575.51 575.10 

574.81 574.68 574.90 575.14 575.15 575.05 575.00 574.68 574.32 

573.10 572.93 572.91 573.19 573.21 573.28 573.27 573.03 572.81 
. _ _ _

- - _. _-- i .__- --

i!5

JAN FEB MAR APR MAY JUN JUL AUG SEX? 

1932 572.61 572.90 572.73 572.86 573.18 573.16 573.11 572.95 572.68 

1933 572.25 572.38 572.37 572.84 573.23 573.37 573.16 572.88 572.50 

1934 571.80 571.59 571.73 572.08 572.15 572.16 572.12 571.93 571.80 

1935 571.46 571.43 571.54 571.82 572.14 572.17 572.35 572.39 572.12 

1936 571.51 571.35 571.65 572.12 572.33 572.41 572.35 572.20 572.16 

1937 571.94 572.29 572.23 572.70 573.04 573.13 573.30 573.14 572.74 

1938 571.96 572.31 572.88 573.28 573.38 573.50 573.56 573.53 573.31 

1939 572.36 572.48 572.86 573.32 573.47 573.59 573.62 573.52 573.32 

1940 572.35 572.11 572.23 572.66 572.94 573.27 573.33 573.21 573.14 

1941 572.80 572.56 572.41 572.60 572.79 572.86 572.80 572.59 572.40 

1942 572.25 572.35 572.70 573.34 573.54 573.85 573.85 573.73 573.49 

1943 573.41 573.21 573.63 573.83 574.61 575.00 575.17 574.96 574.61 

1944 573.34 573.22 573.45 573.95 574.24 574.38 574.30 574.00 573.77 

1945 572.86 572.62 573.14 573.66 574.12 574.45 574.58 574.36 574.14 

1946 573.72 573.58 573.85 573.92 574.03 574.41 574.41 574.12 573.71 

1947 572.97 572.88 572.90 573.95 574.43 574.91 574.86 574.73 574.46 

1948 573.41 573.20 573.70 574.15 574.55 574.52 574.44 574.15 573.76 

1949 573.00 573.21 573.18 573.36 573.40 573.42 573.41 573.17 572.84 

1950 572.76 573.10 573.30 573.93 573.89 573.87 573.86 573.69 573.59 

1951 573.39 573.58 574.01 574.47 574.72 574.82 574.83 574.72 574.47 

1952 574.77 575.01 575.18 575.53 575.64 575.66 575.61 575.49 575.29 

1953 574.19 574.18 574.44 574.69 574.89 575.14 575.13 574.96 574.63 

1954 573.44 573.66 574.03 574.53 574.74 574.79 574.75 574.54 574.36 

1955 574.52 574.27 574.67 574.85 574.92 574.84 574.68 574.40 574.09 

1956 573.05 572.81 573.38 573.77 574.50 574.44 574.38 574.39 574.15 

1957 572.86 572.78 572.93 573.39 573.67 573.71 574.01 573.73 573.46 

1958 572.73 572.63 572.74 572.69 572.84 572.85 572.98 572.89 572.69 

1959 571.66 571.94 572.45 572.81 573.08 573.02 572.86 572.74 572.55 

1960 572.81 572.87 572.91 573.48 573.77 574.18 574.21 574.19 573.94 

1961 572.72 572.68 573.06 573.50 573.90 573.88 573.81 573.73 573.54 

Basis of Compa rison, IJC Phase II Levels Reference

Lake St. Clair Monthly Mean Levels, IGLD 1955
of Compa rison, IJC Phase II Levels Reference

Lake St. Clair Monthly Mean Levels, IGLD 1955

S

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

-------__ B-B----__

Average

Std.Dev

Maximum

Minimum

JAN FEB MAR APR MAY JUN JUL AUG SEP 

572.45

571.83

571.11

570.92

572.07

572.54

573.26

573.59

573.57

573.86

574.10

575.17

575.26

575.06

574.70

573.92

574.18

573.60

574.67

573.81

574.03

574.55

574.64

574.89

575.66

575.91

574.26

573.39

.--------. .---w--w-.

573.27

1.02

575.91

570.92

572.44

571.59

571.03

571.15

572.06

572.48

573.56

573.82

573.56

573.90

573.89

575.05

575.35

575.11

574.96

573.62

574.07

573.53

574.39

574.04

573.97

574.45

574.82

574.92

575.73

575.61

574.17

573.29

es---___ -m---e__

573.25

1.02

575.73

571.03

572.90 573.06 573.12 573.22 573.12 573.00 572.74 

572.01 572.47 572.56 572.57 572.43 572.32 572.08 

571.28 571.67 571.90 571.90 571.84 571.73 571.52 

571.57 571.94 572.09 572.13 572.08 571.99 571.98 

572.45 572.75 572.94 573.06 573.01 572.89 572.63 

572.72 573.23 573.46 573.64 573.73 573.57 573.29 

573.50 573.65 573.73 573.99 574.07 574.02 573.85 

573.69 574.14 574.57 574.88 575.10 574.97 574.50 

573.72 574.05 574.24 574.41 574.52 574.40 574.21 

574.38 574.53 574.58 574.75 574.68 574.58 574.51 

574.28 574.66 574.96 575.05 575.18 575.17 575.08 

575.56 575.84 575.99 576.32 576.28 576.08 575.75 

575.69 575.95 576.12 576.17 576.11 575.88 575.51 

575.46 575.60 575.61 575.78 575.69 575.59 575.54 

575.78 575.84 575.98 575.90 575.92 575.63 575.15 

574.12 574.44 574.53 574.35 574.35 574.23 574.31 

574.18 574.79 574.79 574.79 574.62 574.46 574.28 

574.12 574.85 575.00 575.13 575.15 575.08 574.99 

574.62 575.09 575.17 575.28 575.27 575.31 575.13 

574.19 574.41 574.68 574.88 574.96 574.83 574.78 

574.56 574.93 574.80 574.90 574.84 574.60 574.33 

574.50 574.92 575.42 575.52 575.49 575.45 575.08 

575.12 575.34 575.46 575.69 575.56 575.38 575.15 

575.72 576.14 576.10 576.09 576.02 575.83 575.69 

576.14 576.19 576.26 576.51 576.55 576.36 576.24 

575.63 575.79 575.65 575.55 575.49 575.25 575.05 

574.32 574.49 574.47 574.25 574.06 573.87 573.58 

573.38 573.79 573.95 574.43 574.39 574.12 573.84 

:------------------------------------- ------------======================

573.50 573.88 574.10 574.22 574.22 574.08 573.85 

1.06 1.05 1.03 1.04 1.04 1.02 0.99 

576.14 576.19 576.26 576.51 576.55 576.36 576.24 

571.28 571.67 571.90 571.90 571.84 571.73 571.52 
-. -- _- . r _ .- ------

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1900 174.90 177.80 185.80 185.60 187.70 190.80 195.20 199.50 199.80 2

1901 174.40 186.30 192.90 186.20 189.80 194.70 201.20 205.20 201.40 1

1902 165.10 174.70 180.20 180.90 187.00 193.70 201.70 198.40 196.50 

1903 172.00 167.30 182.40 185.10 192.50 197.00 200.80 200.10 201.00 1

1904 175.40 187.90 190.70 194.50 201.40 203.20 206.70 209.20 207.20 2

1905 177.50 187.70 200.50 190.10 195.80 203.10 209.90 211.50 209.10 2

1906 179.90 180.00 197.30 193.20 205.10 211.10 212.70 208.70 206.10 2

1907 182.70 180.90 192.00 196.50 203.10 201.50 206.50 209.10 207.80 2

1908 175.30 184.40 191.20 192.50 202.20 209.00 212.50 213.00 206.20 2

1909 173.70 174.60 176.70 190.90 193.70 195.10 199.10 198.10 197.30 1

1910 182.70 173.00 177.40 189.00 192.70 193.90 192.00 191.20 190.10 1

1911 156.80 165.60 170.90 174.20 180.40 185.20 185.30 184.70 184.00 1

1912 164.30 164.10 176.70 176.80 188.30 194.10 198.50 199.80 201.30 2

1913 173.30 169.60 183.90 191.30 201.60 203.50 205.60 206.80 206.30 2

1914 180.70 182.60 190.80 188.60 193.70 197.30 201.80 205.30 202.90 1

1915 165.90 175.70 173.20 182.10 188.50 188.40 192.10 192.60 192.00 1

1916 173.90 170.90 176.00 187.00 202.20 202.40 209.10 213.80 211.80 2

1917 180.40 187.00 195.30 204.20 212.00 212.30 215.90 220.70 213.00 2

1918 187.60 196.00 194.10 221.10 223.30 220.30 221.50 219.40 216.50 2

1919 197.80 189.00 206.60 214.10 214.20 213.90 212.10 213.10 210.30 2

1920 180.30 187.60 198.60 201.00 198.00 204.60 207.00 208.60 206.90 2

1921 173.70 168.20 192.40 196.20 196.40 198.90 198.90 198.90 197.90 1

1922 177.50 174.20 188.60 186.80 190.70 200.10 204.20 204.80 200.80 1

1923 170.60 167.50 178.60 181.70 185.30 190.20 191.60 191.30 191.00 1

1924 160.10 154.20 168.40 170.10 175.50 180.80 182.20 186.50 187.70 1

1925 157.20 153.70 166.70 160.00 160.50 169.30 171.20 168.80 165.70 1

1926 138.50 138.60 155.40 152.10 159.30 161.50 165.90 166.10 166.60 1

1927 147.70 150.40 166.30 169.50 174.20 178.70 185.00 183.70 183.80 1

1928 167.90 171.80 175.70 177.00 190.80 195.50 198.30 202.00 205.40 2

1929 196.90 191.70 204.70 221.00 227.40 232.70 234.40 230.00 224.50 2

1930 183.80 187.50 198.10 206.90 211.10 212.90 217.70 215.50 210.30 2

1931 170.00 170.30 178.40 180.90 177.00 180.30 182.00 179.20 180.50 1

Basis of Compar ison,

La ke St. Clai r

IJC Phase II Leve 1s Re

Monthly Mean Out flows

f erence

TCFS

Stu
of Compa

Lake St

r ison

Cla ir

IJC Phase II Levels Reference

Monthly Mean Outflows, TCFS

S

1932 154.60 162.10

1933 151.60 161.80

165.30 168.90 176.90 176.60 178.30 178.70 177.70

1934 151.80 152.40

163.60 169.10 174.80 182.90 181.90 178.70 175.40

1935 153.00 159.10

167.30 169.40 168.60 170.70 171.60 168.10 168.50

1936 154.60

164.40 168.80 173.70 170.30 176.00 176.60 176.70

159.70

1937 152.30 150.80

164.40 163.40 168.60 175.30 176.30 177.60 181.10

1938 149.90

157.70 171.60 168.60 168.60 167.80 168.80 170.30

159.30

1939 159.90 168.70

176.80 176.50 181.40 184.70 188.50 189.50 190.80

1940 166.80 162.40

179.20 183.60 183.10 189.20 192.90 193.10 196.10

1941 159.10 160.50

169.10 168.80 171.30 178.30 180.70 182.50 185.00

1942 168.60 165.60

165.30 170.40 176.90 178.40 179.70 177.40 179.00

1943 171.50

175.60 180.00 184.60 191.40 194.50 192.20 192.50

170.70

1944 178.80 177.60

191.40 189.40 201.40 201.70 211.50 211.40 210.70

1945 170.50 169.40

189.80 189.70 189.70 197.20 201.40 199.00 199.00

1946 176.70 185.70

178.80 184.60 196.00 198.30 202.60 201.20 202.90

1947 171.40 167.50

196.00 198.00 200.60 203.20 201.80 200.50 196.20

1948 174.90

179.10 195.10 193.90 197.60 203.90 206.30 204.10

177.80

1949 166.30 171.90

192.10 190.40 198.20 197.20 198.90 197.70 193.40

1950 157.70

171.40 176.50 177.40 180.20 184.20 183.70 181.10

155.30

1951 163.80 173.70

169.70 176.10 174.60 180.50 188.20 190.30 192.20

1952 203.90 199.60

182.20 193.30 199.30 206.10 212.00 216.90 217.40

1953 190.60 194.20

212.40 218.40 222.20 225.40 231.90 235.50 233.70

1954 177.70 189.40

208.50 213.50 214.80 219.30 224.20 222.40 220.10

1955 190.60

197.70 198.50 201.90 211.80 217.30 214.60 215.20

190.80

1956 168.10

199.40 201.90 205.40 208.60 210.20 203.60 203.30

171.10

1957 161.90 161.00

182.70 186.00 196.30 190.30 193.00 198.60 198.30

1958 151.70 163.00

171.00 174.70 178.40 180.10 187.60 188.00 188.10

1959 142.40 142.10

172.70 167.70 172.00 172.40 173.20 171.90 172.30

1960 162.70

160.70 163.80 167.00 169.30 171.80 175.90 178.50

164.40

1961 169.00 173.00

173.30 186.40 189.90 200.80 201.30 203.90 203.20

179.50 185.10 180.00 182.10 185.50 186.20 187.30

JAN FEB MAR APR MAY JUN JUL AUG SEP 
1962 162.30

1963 149.20

1964 142.00

1965 137.10

1966 157.70

1967 159.20

1968 167.90

1969 176.70

1970 179.10

1971 182.90

1972 187.10

1973 198.20

1974 207.50

1975 198.50

1976 187.30

1977 187.90

1978 175.80

1979 177.40

1980 189.20

1981 181.30

1982 176.90

1983 189.20

1984 188.30

1985 200.50

1986 211.30

1987 209.50

1988 184.50

1989 175.90

_-------- -------mm ----w--m -----s-w

Average 172.79

Std.Dev 16.06

Maximum 211.30

Minimum 137.10

JAN FEB MAR APR MAY JUN JUL AUG SEE? 

Basis of Compar ison I 1 JC Phase II Levels Reference

La ke St. Cla ir Monthly Mean Outflows, TCFS

S

164.20 182.20 180.40 182.50 186.50 186.10 186.20 184.90 

149.80 165.20 167.20 168.10 171.60 173.10 172.60 172.70 

142.70 152.40 153.50 154.70 156.90 159.40 161.60 161.20 

144.40 153.50 161.50 161.20 164.30 167.20 168.50 172.20 

161.30 174.90 180.60 178.60 181.60 181.60 181.10 179.00 

160.20 176.50 184.90 183.20 192.00 195.40 194.10 192.00 

173.80 182.30 182.10 185.90 191.20 193.10 195.50 198.30 

178.90 188.00 192.90 195.80 201.60 205.90 208.10 205.40 

179.80 190.30 195.10 196.30 201.40 206.10 206.70 207.00 

188.70 201.90 206.70 208.10 212.20 214.30 215.40 212.70 

185.30 199.80 205.10 204.90 208.00 211.80 217.70 219.80 

197.40 220.10 216.90 224.10 231.00 232.90 233.70 233.70 

205.00 213.90 218.80 224.70 227.00 232.00 233.60 230.50 

201.70 212.20 219.50 218.00 223.40 224.80 226.60 223.20 

198.30 209.90 215.50 221.40 223.70 226.90 221.80 215.50 

182.40 198.20 194.30 189.40 190.40 191.60 190.60 195.50 

181.40 190.80 192.70 190.70 195.70 198.40 201.70 205.50 

175.90 196.30 207.70 208.20 212.10 215.80 216.60 214.90 

189.90 204.10 205.10 207.40 209.70 213.20 211.50 211.90 

193.90 195.50 203.30 205.10 205.00 207.70 208.10 210.20 

174.80 196.00 194.40 194.80 199.80 203.30 205.60 206.00 

193.50 203.70 211.40 217.20 222.10 221.90 221.20 219.60 

199.30 208.30 204.10 207.40 215.40 217.40 219.30 220.90 

209.00 222.70 227.10 230.90 232.80 233.70 235.60 235.70 

207.70 227.00 225.70 227.60 232.40 235.50 237.30 245.70 

206.30 220.80 219.90 218.10 217.50 215.40 214.90 214.00 

183.90 196.80 198.80 201.00 198.40 199.40 196.80 195.90 

174.20 186.50 190.60 189.30 190.40 191.80 192.20 190.70 

______-_-_----------~-------~-~~-~~~~~~~~~~~~~~~~--~--~-- _____--_--_-------------~---~--~~~~~~~~~~~~~~~-~-~-~--~-~ _________

_________

175.06 185.93 189.58 193.15 196.65 199.59 200.01 199.40 

15.94 16.69 17.24 17.43 17.42 17.64 17.84 17.28 

209.00 227.00 227.10 230.90 232.80 235.50 237.30 245.70 

138.60 152.40 152.10 154.70 156.90 159.40 161.60 161.20 
._- _._ -- _.-_-_-. -. ____ ---- -_-..-.-_--_--- .----/--__----_-_--- --

JAN FEB MAR

Basis of Comparison, IJC Pha se II Level.s Ref eren

Lake Erie Monthly Me an Levels, IGLD 1955

1900 569.75 570.04 570.64 571.06 571.12 571.02 570.91

1901 569.91 569.73 569.87 570.45 570.60 570.81 570.78

1902 569.71 569.42 569.69 570.15 570.38 570.58 571.16

1903 570.21 570.44 571.00 571.62 571.52 571.43 571.36

1904 569.91 570.15 570.84 571.88 571.96 572.05 571.91

1905 570.22 570.20 570.28 570.89 571.29 571.68 571.66

1906 570.48 570.54 570.53 570.97 571.11 571.21 571.25

1907 571.39 571.25 571.14 571.48 571.52 571.80 571.78

1908 571.11 571.07 571.62 572.09 572.16 572.08 571.84

1909 569.92 570.15 570.69 570.96 571.61 571.82 571.58

1910 570.02 570.09 570.58 570.89 571.24 571.19 570.99

1911 569.73 569.89 569.93 570.31 570.47 570.46 570.26

1912 569.99 569.91 570.07 571.00 571.22 571.25 571.10

1913 570.80 571.10 571.21 572.69

1914

572.52 572.30 572.03

570.63 570.50 570.41 571.09 571.68 571.71 571.49

1915 569.98 570.24 570.33 570.27 570.36 570.47 570.63

1916 570.46 570.76 570.79 571.37

1917

571.71 572.07 572.01

570.66 570.53 570.69 571.56 571.83 572.29 572.59

1918 570.93 570.82 571.43 571.44 571.37 571.55 571.50

1919 570.79 570.76 571.02 571.63 572.20 572.29 572.00

1920 570.21 569.98 570.15 570.89 571.35 571.39 571.46

1921 570.59 570.59 570.87 571.48 571.69 571.55 571.39

1922 570.21 570.06 570.31 571.23 571.53 571.56 571.40

1923 569.94 569.75 569.98 570.44 570.70 570.85 570.75

1924 569.99 570.06 570.03 570.58 570.88 570.96 571.03

1925 569.44 569.36 569.81 570.10 570.00 569.78 569.69

1926 568.63 568.57 568.73 569.59 569.68 569.68 569.62

1927 569.64 569.65 569.93 570.44 570.60 570.76 570.69

1928 570.51 570.53 570.45 570.79 570.83 571.10 571.37

1929 570.75 570.95 571.40 572.27 572.85 572.77 572.68

1930 572.17 572.01 572.26 572.44 572.33 572.16 571.95

1931 570.24 570.11 570.11 570.52 570.65 570.66 570.59

JUL AUG SEP

570.83 570.50 

570.54 570.37 

571.18 570.76 

571.12 570.97 

571.57 571.29 

571.46 571.18 

571.20 570.90 

571.51 571.22 

571.63 571.17 

571.31 570.87 

570.82 570.55 

570.08 569.94 

571.04 571.01 

571.68 571.18 

571.24 571.01 

570.87 570.78 

571.62 571.15 

572 -29 571.96 

571.36 571.19 

571.72 571.36 

571.35 571.06 

571.04 570.75 

571.15 570.96 

570.42 570.16 

570.72 570.43 

569.61 569.43 

569.68 569.72 

570.52 570.17 

571.25 570.79 

572.31 571.89 

571.56 571.21 

570.34 570.00 

ce S
._

_. . 

_. __f_._ I_ .__j. _. _ - . . .-.------

Basis

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 570.03 570.33 570.26 570.42 570.62 570.60 570.48 570.25 569.91 

1933 569.63 569.61 569.83 570.38 570.74 570.71 570.45 570.15 569.74 

1934 569.01 568.82 568.83 569.34 569.47 569.40 569.33 569.18 568.98 

1935 568.48 568.36 568.64 568.99 569.28 569.43 569.51 569.53 569.16 

1936 568.49 568.22 568.81 569.58 569.71 569.61 569.49 569.24 569.06 

1937 569.19 569.84 569.81 570.12 570.66 570.78 571.03 570.79 570.21 

1938 569.28 569.60 570.13 570.76 570.76 570.82 570.80 570.73 570.38 

1939 569.51 569.53 570.02 570.60 570.83 570.81 570.75 570.60 570.23 

1940 569.28 569.22 569.46 570.15 570.46 570.70 570.71 570.49 570.32 

1941 570.15 569.90 569.83 570.03 570.09 570.14 570.02 569.79 569.48 

1942 569.08 569.45 569.91 570.75 570.89 571.10 571.02 570.91 570.59 

1943 570.61 570.49 570.71 571.14 571.87 572.37 572.35 572.07 571.60 

1944 570.30 570.29 570.52 571.29 571.69 571.67 571.43 571.09 570.77 

1945 569.88 569.70 570.42 571.05 571.35 571.73 571.78 571.53 571.18 

1946 570.89 570.55 570.88 571.02 571.08 571.53 571.58 571.22 570.77 

1947 57O.Oi 570.13 570.07 571.14 571.83 572.37 572.14 571.89 571.58 

1948 570.52 570.26 570.78 571.54 571.87 571.85 571.70 571.34 570.92 

1949 570.20 570.45 570.69 570.87 570.90 570.84 570.71 570.41 570.03 

1950 570.15 570.78 570.89 571.63 571.62 571.44 571.21 570.92 570.73 

1951 570.81 570.91 571.50 571.90 572.06 572.02 571.87 571.58 571.21 

1952 571.56 572.14 572.26 572.65 572.71 572.65 572.41 572.14 571.90 

1953 571.14 571.13 571.34 571.64 571.88 572.10 571.95 571.76 571.35 

1954 570.47 570.54 571.09 571.83 572.03 571.82 571.61 571.39 571.12 

1955 571.60 571.36 571.91 572.17 572.17 571.98 571.71 571.52 571.09 

1956 570.22 569.92 570.63 571.15 571.85 571.93 571.78 571.65 571.32 

1957 570.15 570.19 570.36 570.96 571.23 571.24 571.44 571.05 570.67 

1958 570.28 569.93 570.05 570.22 570.30 570.30 570.45 570.38 570.09 

1959 569.12 569.63 570.02 570.50 570.76 570.63 570.33 570.05 569.70 

1960 570.06 570.20 570.27 570.75 571.04 571.29 571.32 571.21 570.89 

1961 569.73 569.67 570.29 570.82 571.50 571.41 571.22 571.09 570.81 

of Compa rison, IJC Phase II Levels Refe rence

Lake E rie Monthly Mean Levels, IGLD 1 955
1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

------___ -m-B---__

Average

Std.Dev

Maximum

Minimum

:6?. 57 5:?iB 63

569.12 568:92

568.37 568.37

568.27 568.49

569.19 569.19

569.79 569.81

570.52 570.87

570.72 571.09

570.61 570.70

570.90 570.90

571.11 570.98

572.28 572.25

572.14 572.45

572.11 572.21

571.93 572.09

570.83 570.71

571.55 571.36

570.71 570.77

571.85 571.55

570.88 570.94

571.31 571.40

571.68 571.53

571.82 571.87

571.83 571.73

572.60 572.89

572.98 572.77

571.41 571.42

570.46 570.49

================

570.39 570.42

0.98 0.98

572.98 572.89

568.27 568.22

MAR

569.99

569.28

568.70

569.06

569.58

569.91

570.80

570.91

570.87

571.45

571.37

572.58

572.91

572.64

573.13

571.20

571.48

571.25

571.72

571.37

571.86

571.57

572.28

572.72

573.18

572.65

571.52

570.52

------__ -----___

570.71

1.01

573.18

568.64

Basis of

APR

570.35

569.95

569.28

569.40

569.92

570.45

571.11

571.46

571.28

571.60

571.83

573.11

573.21

572.73

573.15

571.83

572.34

572.02

572.42

571.53

572.47

572.02

572.77

573.26

573.37

572.97

571.77

571.05

.-----___ -------_

571.21

0.99

573.37

568.99

M?,Y

570.37

570.04

569.56

569.61

570.24

570.81

571.10

571.96

571.50

571.63

572.24

573.14

573.29

572.78

573.18

572.08

572.39

572.21

572.46

571.85

572.30

572.53

572.85

573.11

573.41

572.83

571.68

571.31

------__ --------

571.41

0.95

573.41

569.28

Comparison, IJC Pha se II Leve

Lake Erie Monthly Mean Levels,

1 s Re ference

IGLD 1955

S

JUN

570.39

569.95

569.48

569.57

570.32

570.80

571.30

572.22

571.58

571.75

572.29

573.41

573.30

572.87

573.02

571.81

572.26

572.28

572.55

572.13

572.30

572.54

572.95

573.04

573.63

572.71

571.45

571.92

.-------_

571.47

0.97

573.63

569.40

JUL

570.26

569.71

569.33

569.41

570.25

570.83

571.37

572.40

571.61

571.59

572.36

573.30

573.09

572.70

572.97

571.78

571.96

572.21

572.45

572.16

572.12

572.51

572.72

572.93

573.60

572.69

571.16

571.83

.-----___

571.39

0.95

573.60

569.33

AUG

570.09

569.56

569.11

569.25

570.10

570.65

571.22

572.16

571.43

571.42

572.18

573.01

572.74

572.52

572.70

571.65

571.65

572.09

572.54

571.98

571.74

572.47

572.43

572.61

573.30

572.37

570.98

571.45

.-------- .-m-s----

571.18

0.92

573.30

569.11

SEP

569.76

569.23

568.84

569.11

569.80

570.31

570.91

571.61

571.15

571.40

572.00

572.56

572.31

572.55

572.21

571.62

571.29

572.02

572.29

571.85

571.35

572.01

572.06

572.42

572.91

572.12

570.60

571.11

es------ --------

570.88

0.90

572.91

568.84
_-- - --._____

1900 182.10 189.80 204.80 214.00 220.40 216.20 207.50 208.90 204.00 1

1901 185.40 183.40 188.50 200.80 209.00 211.40 204.80 202.50 201.20 1

1902 181.30 177.20 184.80 194.40 204.50 206.70 213.20 216.50 209.60 2

1903 191.70 198.30 212.60 226.50 229.40 225.30 217.50 215.30 214.10 2

1904 185.40 192.00 209.00 232.50 239.50 239.40 230.20 225.30 221.30 2

1905 192.00 193.20 197.10 210.20 224.30 230.90 224.40 222.80 218.80 2

1906 197.40 200.50 202.50 212.00 220.10 220.30 215.10 216.90 212.60 2

1907 217.40 215.80 215.70 223.30 229.40 233.60 227.20 223.90 219.70 2

1908 211.20 212.00 226.60 237.40 244.10 240.10 228.40 226.70 218.50 2

1909 185.70 192.20 205.70 211.90 231.40 234.10 222.50 219.50 212.00 2

1910 187.60 190.90 203.60 210.20 223.10 219.90 209.30 208.60 204.90 2

1911 181.80 186.70 189.70 197.90 206.20 203.90 193.60 192.80 192.10 1

1912 187.10 187.20 192.60 212.60 222.70 221.20 211.80 213.40 215.00 2

1913 204.40 212.60 217.30 251.60 252.60 245.30 233.00 227.70 218.80 2

1914 200.70 199.60 199.90 214.60 233.00 231.70 220.50 217.80 215.10 2

1915 186.80 194.10 198.10 196.90 204.00 204.10 201.40 209.70 210.10 2

1916 197.10 205.20 208.00 221.00 233.80 239.90 232.40 226.30 218.00 2

1917 201.30 200.10 205.90 225.10 236.50 245.10 246.10 241.90 236.50 2

1918 207.10 206.40 222.10 222.40 226.00 227.90 220.70 220.60 218.90 2

1919 204.10 205.10 213.00 226.80 245.10 245.10 232.20 228.80 222.90 2

1920 191.70 188.60 194.50 210.20 225.60 224.40 219.90 220.40 216.20 2

1921 199.70 201.40 209.80 223.30 233.30 228.00 218.30 213.40 209.30 2

1922 191.70 190.20 197.70 217.80 229.60 228.30 218.60 215.90 213.80 2

1923 186.00 183.90 190.90 200.60 211.30 212.40 204.10 200.00 196.70 1

1924 187.10 190.20 191.80 203.50 215.10 214.80 210.20 206.50 202.50 1

1925 175.80 175.90 187.20 193.40 196.40 189.90 181.80 183.30 181.80 1

1926 160.10 160.70 166.00 182.90 189.90 187.70 180.50 184.60 187.70 1

1927 180.00 181.80 189.70 200.50 209.00 210.40 202.80 202.20 197.00 1

1928 198.00 200.20 200.80 208.00 214.00 217.80 217.80 218.10 210.30 2

1929 203.30 209.30 221.40 241.70 260.70 256.50 248.40 242.50 234.90 2

1930 235.30 233.20 241.40 245.50 248.20 241.90 231.00 225.20 219.50 2

1931 192.20 191.30 193.40 202.20 210.10 208.20 200.70 198.30 193.40 1

JAN FEB MAR

Basis of Compa rison , IJC Phase I I Levels Reference

Lake Erie Month ly Mean Outflows , TCFS

Stu

AUG SEE' 
Basis of Comparison, IJC Phase II Levels Reference Stu

Lake Erie Monthly Mean Outflows, TCFS

1932 187.90 195.80 196.60 200.10 209.50 207.00 198.40

1933 179.70 181.00

196.40 191.60 1

187.60 199.40 212.00 209.30 197.60

1934 167.40 165.40

194.30 188.00 1

167.80 179.00 185.50 182.10 174.60

1935 157.30

174.60 173.00 1

156.60 164.30 171.10 181.80 182.70 178.20

1936 157.50 154.10

181.70 176.40 17

167.50 182.80 190.50 186.40 177.80

1937 170.90 185.70

175.70 174.50 17

187.40 193.80 210.50 210.90 210.10

1938 172.70 180.80

207.90 197.80 1

193.90 207.50 212.60 211.80 205.20

1939 177.40 179.40

206.70 201.30 1

191.70 204.10 214.10 211.60 204.00

1940 172.80

203.90 198.20 19

173.30 180.20 194.50 206.10 209.20 203.30

1941 190.50 187.00

201.50 200.20 19

187.80 191.90 198.30 197.20 188.60

1942 168.80

186.90 182.80 17

177.70 189.40 207.20 215.30 218.00 209.90

1943 200.20

210.70 205.80 20

199.30 206.40 215.70 237.40 247.10 240.40

1944 193.70 195.00

236.90 228.20 21

202.10 219.10 233.10 230.70 219.20

1945 184.90 182.90

214.70 209.70 20

200.10 213.70 225.60 232.00 227.20

1946 206.20 200.70

224.30 218.70 22

210.10 213.10 219.60 227.60 222.60

1947 187.50 191.70

217.50 209.80 20

192.70 215.80 236.40 247.00 235.40

1948 198.20 194.40 224.80 237.40 234.80

232.70 227.80 21

207.90 225.30

1949 191.60 198.50 205.80

220.10 213.10 20

209.70 215.70 212.20 203.20

1950 190.40 205.60

199.80 194.00 18

210.20 226.80 231.60 225.40 214.30

1951 204.60 208.40

210.70 208.80 20

223.70 232.90 241.90 238.70 229.20

1952 221.30

225.50 219.40 21

236.20 241.20 250.80 257.20 253.80 241.80

1953 211.70 213.20

238.40 235.20 22

220.20 227.00 237.60 240.70 231.00

1954 197.10 200.40

229.70 222.60 21

214.50 231.40 241.00 234.20 223.30

1955 222.00 218.30

221.30 217.40 22

233.20 239.30 244.50 237.80 225.50

1956 191.90

224.20 216.80 21

187.30 204.60 216.00 237.00 236.70 227.00

1957 190.50 193.00

227.00 221.90 21

198.70 211.70 222.80 221.00 219.30

1958 193.20

213.60 207.70 19

187.50 192.30 196.00 202.60 200.60 197.70

1959 169.50

199.10 195.30 18

181.40 191.60 201.90 212.60 207.50 195.20

1960 188.50

192.30 187.30 18

193.20 196.90 207.20 218.60 222.10 216.60

1961 181.80 182.20 197.30

217.20 212.40 20

208.70 228.90 224.70 214.40 214.70 210.50 20

JAN FEB MAR APR MAY JUN JUL AUG SEP 
_ . - - .-. __- _

-.-.-I___

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

---v----e

---------

Average

Std.Dev

Maximum

Minimum

JAN FEB MAR APR MAY JUN JUL AUG SEP 

178.60 181.40

169.60 167.30

155.10 157.00

153.40 159.10

171.00 172.70

183.00 185.10

198.20 207.60

202.50 212.30

200.20 203.80

206.60 208.20

211.20 210.00

238.00 238.80

234.60 243.70

234.00 238.00

229.70 235.10

205.00 204.00

220.90 218.30

202.40 205.30

227.70 222.60

206.10 209.10

215.50 219.20

224.00 222.30

227.20 230.00

227.40 226.90

245.60 254.30

254.80 251.20

217.80 219.60

197.00 199.30

.-------a ._-_----- ----e-m- __------

196.15 198.41

20.90 21.05

254.80 254.30

153.40 154.10

Basis of Comparison, IJC Phase II Levels Reference St

Lake Erie Monthly Mean Outflows, TCFS

190.90 198.70 204.10 202.40 193.60 193.00 188.60 1

176.70 190.30 197.30 193.20 182.30 182.30 177.90 1

165.30 176.80 187.40 183.80 174.60 173.20 170.20 1

172.20 179.00 188.40 185.50 176.20 176.00 175.50 1

182.60 189.60 201.50 201.00 193.40 193.20 189.30 

189.30 200.70 213.50 211.30 205.90 204.90 200.00 1

208.30 215.00 220.00 222.40 217.70 217.40 212.70 2

210.50 223.00 239.40 243.50 241.60 239.00 228.40 2

209.70 218.80 229.00 228.70 223.30 222.20 218.20 

222.60 226.10 231.90 232.60 222.80 222.00 223.60 2

220.70 231.40 246.00 245.00 240.70 239.40 237.40 2

248.90 261.90 267.80 272.20 263.50 259.50 250.60 2

256.90 264.50 271.50 269.70 258.40 252.70 244.60 2

250.40 252.60 258.90 259.00 248.80 247.40 250.30 2

262.40 263.00 268.80 262.70 255.40 251.80 242.30 2

217.00 231.30 242.20 233.80 227.00 227.00 228.60 2

223.40 243.20 249.60 244.40 231.30 227.00 221.20 2

218.20 235.80 245.30 244.80 237.20 237.20 237.80 2

228.70 245.10 251.30 251.20 242.70 248.00 244.20 2

220.70 224.60 237.00 241.20 236.00 234.80 234.00 2

232.10 246.40 247.30 245.30 235.10 229.10 222.70 2

225.30 235.70 253.00 251.10 244.20 246.20 237.70 2

241.80 253.60 260.70 261.00 249.20 245.30 238.90 2

252.40 265.60 267.10 263.30 254.30 249.50 247.20 2

263.60 268.40 274.50 277.90 271.10 266.60 259.00 2

250.60 258.40 260.10 255.10 248.50 243.80 240.10 2

224.10 229.90 232.90 225.70 213.20 212.10 206.00 2

202.10 213.80 224.60 236.40 228.20 222.60 217.30 2

,___________________-------------------------------------------

206.81 217.85 227.41 226.75 218.87 217.11 212.64 2

22.15 22.10 21.44 21.72 21.31 20.26 19.52 

263.60 268.40 274.50 277.90 271.10 266.60 259.00 2

164.30 171.10 181.80 182.10 174.60 173.20 170.20 1
Basis of Comparison, IJC Phase II Levels

Lake Ontario Monthly Mea

Reference Stu

n Levels, IGLD 1955, Without Devi

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1900 244.15 244.28 244.52 245.26

1901 243.66 243.49 243.50 244.90

245.65 245.66 245.60 245.44

245.56 245.74 245.52 245.10

1902 243.66 243.55 244.17 244.80

1903 243.50 243.73 244.54 245.56

245.00 245.42 246.21 246.09

1904 242.93 243.18 243.85 245.36

245.52 245.35 245.54 245.41

1905 243.16 242.94 243.13 244.36

246.12 246.46 246.36 245.86

1906 243.89 244.00 243.86 244.30

245.07 245.61 245.83 245.60

1907 244.23 244.35 244.18 244.66

244.79 245.30 245.63 245.34

1908 244.16 244.28 244.63 245.46

245.09 245.46 245.57 245.39

1909 242.86 243.05 243.58 244.39

246.12 246.27 246.02 245.50

1910 243.31 243.45 244.08 244.65

245.62 245.86 245.62 245.23

1911 243.24 243.35 243.58 244.36

245.31 245.50 245.38 245.18

1912 244.48 244.30 244.27 245.30

245.24 245.73 245.92 245.66

1913 244.37 244.76 244.64 245.78

246.22 246.80 246.43 245.74

1914 243.51 243.65 243.64 244.76

246.09 246.11 245.75 245.27

1915 243.13 243.52 243.90 244.10

245.44 245.57 245.38 245.06

1916 243.78 243.98 243.98 244.94

244.60 244.93 245.08 245.46

1917 243.40 243.48 243.94 245.12

245.75 246.56 246.62 245.71

1918 243.53. 243.56 244.28 244.98

245.38 245.79 246.18 245.78

245.11 245.20 245.27 245.00

1919 243.86 243.82 243.89 244.50

1920 243.24 243.16 243.42 244.31

245.48 246.11 245.79 245.15

1921 244.14 244.00 244.26 244.81

244.92 245.31 245.74 245.70

245.16 245.24 245.17 244.84

1922 243.61 243.66 244.15 245.13

1923 243.01 242.94 243.27 244.22

245.75 245.88 245.95 245.35

245.00 245.70 245.64 245.28

1924 .244.13 244.14 244.07 244.75 245.61 245.87 245.71 245.40

1925 242.79 242.77 243.66 244.32 244.53 244.64 244.58 244.40

1926 243.22 242.94 242.88 243.82 244.88 245.19 245.24 245.14

1927 244.02 243.81 244.01 244.39 244.61 245.19 245.48 245.40

1928 245.09 245.19 245.04 245.52

1929 244.02 244.29 244.47 245.62

245.78 245.84 246.01 245.78

246.54 246.66 246.44 245.85

1930 244.22 244.92 245.53 245.94 246.06 246.02 245.91 245.24

1931 243.11 243.00 243.16 243.94 244.79 245.49 245.60 245.39

244.92 2

244.64 2

245.26 2

244.92 2

245.15 2

244.98 2

244.69 2

244.82 2

244.56 2

244.58 2

244.80 2

245.36 2

245.18 2

244.66 2

244.80 2

245.20 2

244.72 2

245.02 2

244.70 2

244.54 2

245.21 2

244.46 2

244.70 2

244.89 2

244.80 2

244.09 2

245.06 2

244.88 2

245.02 2

245.08 2

244.58 2

245.06 2
La

Basis of Comparison, IJC Phase II Levels Reference St

ke Ontario Monthly Mean Levels, IGLD 1955, Without Dev

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 244.46 244.91 244.91 245.45 245.76 245.73 245.79 245.75 245.34 

1933 244.51 244.43 244.52 245.51 246.10 246.11 245.96 245.64 245.27 

1934 243.86 243.67 243.61 244.35 245.05 245.25 245.28 244.88 244.52 

1935 243.19 242.96 242.97 243.34 243.87 244.40 244.80 244.59 244.12 

1936 242.73 242.28 242.71 244.42 245.07 245.08 244.85 244.40 244.05 

1937 243.39 243.90 244.02 244.44 245.43 245.91 245.91 245.53 244.91 

1938 243.72 244.06 244.46 245.02 245.21 245.36 245.44 245.54 245.27 

1939 243.39 243.33 243.81 244.84 245.47 245.42 245.35 245.25 244.90 

1940 243.25 242.91 242.87 243.88 245.08 245.52 245.52 245.09 244.53 

1941 244.10 244.05 243.93 244.56 245.15 245.34 245.35 245.15 244.78 

1942 243.79 243.71 244.20 245.30 245.67 245.91 245.68 245.40 244.86 

1943 244.09 244.25 244.48 245.09 246.07 246.97 246.74 246.18 245.32 

1944 243.33 243.30 243.49 244.33 245.28 245.61 245.58 245.08 244.55 

1945 243.30 243.28 244.01 245.08 245.67 246.04 245.94 245.41 244.79 

1946 244.11 244.14 244.35 244.32 244.37 244.92 245.11 244.90 244.45 

1947 243.68 244.03 243.97 244.99 245.89 246.93 246.91 246.48 245.64 

1948 243.52 243.46 243.98 245.08 245.54 245.68 245.44 245.01 244.44 

1949 243.63 243.96 244.27 244.74 245.02 245.13 245.16 244.82 244.45 

1950 243.91 244.39 244.53 245.65 245.83 245.71 245.52 245.22 244.82 

1951 244.19 244.46 244.99 246.00 246.49 246.28 246.06 245.42 244.81 

1952 244.21 244.92 245.24 246.04 246.39 246.50 246.06 245.46 244.84 

1953 243.78 243.96 244.14 244.81 245.39 245.77 245.51 245.17 244.66 

1954 243.51 243.77 244.59 245.33 246.15 246.02 245.58 245.02 244.66 

1955 244.40 244.39 244.84 245.71 245.89 245.66 245.32 245.02 244.50 

1956 243.39 243.38 243.79 244.58 245.62 245.89 245.53 245.04 244.70 

1957 243.41 243.61 243.92 244.38 244.95 245.50 245.85 245.37 244.79 

1958 243.72 243.72 244.03 244.83 245.53 245.90 245.96 245.85 245.69 

1959 243.80 243.93 244.32 245.37 245.80 245.71 245.50 245.10 244.64 

1960 244.39 244.54 244.52 245.35 246.20 246.34 245.88 245.29 244.60 

1961 242.72 242.38 243.04 243.95 244.99 245.46 245.48 244.99 244.51 
Basis of Comparison, IJC Phase II Levels

Lake Ontario Monthly Mean Levels,

Reference S

IGLD 1955, Without De

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

242.96

243.46

242.94

241.61

242.87

243.55

244.63

244.06

243.61

244.09

243.84

245.62

246.71

246.93

245.92

246.55

246.27

244.04

244.74

243.93

244.44

244.62

244.89

244.76

245.63

250.47

248.32

244.04

------__ v-B---__

244.05

1.21

250.47

241.61

------___

Average

Std.Dev

Maximum

Minimum

242.84

243.02

242.64

241.39

242.82

243.67

244.70

244.33

243.77

244.11

243.98

246.46

247.45

247.38

246.36

246.17

246.85

244.26

244.76

244.04

244.47

244.89

245.29

244.99

246.49

251.06

248.49

243.91

------__ --mm----

244.16

1.37

251.06

241.39

JAN FEB MAR APR MAY JUN JUL AUG SEP 

243.07 244.10

242.92 243.99

242.60 243.32

241.58 242.10

243.36 243.81

243.67 244.52

244.58 245.15

244.09 244.77

243.91 244.65

244.50 245.15

244.16 244.96

247.02 248.19

247.91 248.63

247.81 248.44

247.54 248.60

246.40 247.16

246.68 247.55

244.73 245.75

244.68 245.72

244.70 244.73

244.54 245.45

244.86 245.23

245.82 246.57

245.80 246.56

247.07 248.05

251.36 252.21

248.36 248.73

243.86 244.65

================

244.42 245.22

1.39 1.40

251.36 252.21

241.58 242.10

244.87 245.14

244.96 245.34

244.06 244.46

242.92 243.22

244.17 244.60

245.33 245.87

245.18 245.55

245.49 245.92

245.27 245.45

245.70 245.59

245.89 246.10

248.61 248.91

249.25 249.60

248.71 248.74

249.29 249.69

247.30 246.84

247.95 247.69

246.10 246.04

246.15 246.03

245.01 245.36

245.76 245.92

246.04 246.16

247.22 247.40

246.66 246.59

248.37 248.75

252.27 252.07

248.75 248.30

245.36 246.00

:================

245.78 246.02

1.30 1.23

252.27 252.07

242.92 243.22

245.04

245.22

244.46

243.38

244.57

246.10

245.72

245.76

245.58

245.36

246.39

248.80

249.59

248.30

249.87

246.53

247.01

245.68

245.85

245.52

245.72

245.68

247.16

246.34

248.99

251.78

247.46

245.92

---- ----====

245.96

1.16

251.78

243.38

244.95

245.07

244.16

243.18

244.30

245.91

245.41

245.30

245.30

245.00

246.08

248.32

249.17

247.56

249.65

246.16

246.22

245.33

245.59

245.47

245.14

245.31

246.60

245.76

249.02

250.99

246.68

245.31

me---___ ------__

245.60

1.11

250.99

243.18

244.54

244.58

243.74

242.96

243.97

245.39

245.00

244.53

244.75

244.78

245.35

247.57

248.39

246.91

248.97

245.75

245.44

245.11

245.00

245.24

244.68

244.82

245.89

245.30

248.86

250.18

245.82

244.71

.-D-B---_ -w-----e

245.08

1.05

250.18

242.96

.

.
- - -. . _.-_.____

Basis of Comparisqn, IJC Phase II Levels Reference St

Lake Ontario Monthly Mean Outflows, TCFS, Without Devia

JAN FEB MAR APR MAY JON JUL AUG SEP 

1900 210.00 213.50 232.50 245.00 254.50 246.00 243.80 243.50 250.50 2

1901 213.50 213.50 204.00 238.20 259.20 265.20 266.00 253.20 252.00 2

1902 211.20 207.00 220.80 237.80 224.80 214.50 246.00 287.80 282.80 2

1903 210.00 222.50 247.00 269.20 275.20 255.80 254.50 264.80 271.80 2

1904 210.00 207.00 221.00 262.50 281.20 288.80 293.80 305.00 295.50 2

1905 210.00 207.00 204.00 214.50 235.50 255.80 278.20 288.50 288.20 2

1906 220.00 242.20 236.50 228.50 222.50 225.80 250.00 261.20 255.80 

1907 220.00 253.00 252.50 255.00 247.80 249.50 258.20 270.50 268.80 2

1908 220.00 252.00 262.50 280.00 294.50 299.50 300.00 298.20 271.20 2

1909 210.00 207.00 216.00 225.00 266.00 276.00 278.20 276.20 259.50 2

1910 210.00 207.00 222.80 234.20 249.50 250.80 245.50 250.00 254.80 2

1911 210.00 207.00 204.80 191.20 200.20 212.50 219.50 223.00 223.00 2

1912 220.00 225.00 223.00 239.50 262.50 275.00 288.20 283.00 272.50 2

1913 220.00 255.80 262.20 282.20 290.80 295.80 285.00 272.80 266.00 2

1914 211.00 226.50 218.20 242.20 261.00 264.20 260.80 251.20 260.00 2

1915 210.00 212.50 227.50 209.00 195.80 213.80 220.20 236.00 268.20 2

1916 216.80 238.00 237.00 253.20 272.00 288.00 302.50 305.00 276.20 2

1917 210.00 210.80 222.80 257.50 265.00 271.50 290.80 305.50 297.50 2

1918 218.20 227.20 254.20 275.20 269.20 256.50 255.50 257.80 261.80 2

1919 220.00 244.20 246.20 252.50 270.50 293.00 297.00 288.80 269.50 2

1920 210.00 207.00 207.20 214.50 215.20 217.20 226.20 260.00 269.80 2

1921 220.00 24-4.50 251.50 259.20 257.00 247.50 240.50 236.50 229.80 

1922 210.00 207.00 226.50 247.00 265.20 271.00 285.80 275.00 265.00 2

1923 210.00 207.00 204.00 196.50 203.80 235.80 244.80 235.80 231.20 2

1924 218.50 227.20 220.80 221.50 244.20 257.50 259.50 262.20 253.00 2

1925 210.00 207.00 210.50 227.80 221.20 213.50 217.80 220.00 221.20 2

1926 210.00 207.00 204.00 188.20 204.20 210.50 217.20 220.20 225.00 2

1927 220.00 235.20 239.80 241.20 221.00 215.50 218.00 242.20 238.50 2

1928 220.00 253.50 257.20 260.80 264.00 252.80 266.00 277.80 276.20 2

1929 220.00 251.80 257.80 278.20 298.80 303.20 302.50 307.00 289.20 2

1930 220.00 258.20 279.00 293.00 296.80 289.00 288.50 276.00 265.20 2

1931 210.00 207.00 204.00 188.00 196.80 218.50 221.80 222.50 223.00 2
Basis of Compa rison, IJC Phase II Leve s Reference

Lake Ontario Monthly Mean Outf lows, TCFS Without DeV

Stu

iat

1932 212.50 238.80 241.50 250.00 255.80 237.00 222.50 226.50 223.00

1933

2

211.50 208.00 204.00 213.80 243.00 235.50 220.80 221.20 221.50 2

1934 210.00 207.00 204.00 188.00 188.50 196.00 202.50 203.50 202.80 1

1935 210.00 207.00 204.00 188.00 188.00 193.00 205.00 210.00 208.50 1

1936 210.00 207.00 204.00 199.20 215.20 216.20 213.20 212.20 212.80

1937 210.00

2

212.80 224.20 197.50 222.20 227.50 249.80 251.50 236.00 2

1938 210.00 214.20 233.20 244.50 242.50 219.20 221.20 224.00 235.00 2

1939 210.00 207.00 204.20 225.00 248.20 243.20 231.20 220.50 221.80 2

1940 210.00 207.00 204.00 188.00 217.80 243.50 250.80 250.20 229.20

1941 220.00

2

226.00 215.00 190.00 193.20 207.00 211.80 216.50 216.80 2

1942 210.00 207.00 209.00 239.20 248.00 259.80 251.80 254.80 251.50 2

1943 220.00 245.20 254.20 261.20 279.00 300.80 305.20 310.00 300.80 2

1944 210.00 214.80 216.50 224.50 248.00 259.50 270.20 262.00 252.80

1945 210.00

2

207.00 215.20 254.20 269.00 283.50 290.50 289.00 274.20

1946

2

220.00 250.20 256.80 259.80 232.50 232.00 241.00 245.80 245.20

1947

2

214.80 242.20 238.00 256.80 279.00 300.20 304.50 310.00 307.80

1948

2

211.20 220.20 231.50 264.20 278.50 283.20 273.20 263.80 254.00

1949 212.50

2

228.00 239.00 243.50 238.20 220.00 220.00 222.50 222.80 2

1950 211.00 233.50 238.80 267.20 278.80 266.80 257.20 252.50 256.50 2

1951 220.00 254.20 269.80 284.80 298.50 307.20 300.00 284.50 276.00 2

1952 220.00 258.80 276.80 292.80 301.50 307.50 302.20 288.20 280.00

1953 220.00

2

242.00 244.20 258.80 261.80 278.00 270.80 271.20 263.50 2

1954 210.00 219.50 250.80 263.50 287.50 291.50 278.20 258.80 257.80 2

1955 220.00 253.50 267.00 285.00 294.00 281.20 262.00 260.20 256.50 2

1956 210.00 217.00 235.50 250.50 276.50 288.50 285.80 273.00 270.20

1957

2

210.00 219.00 226.50 225.50 219.20 223.50 252.50 258.80 250.50

1958

2

210.00 207.00 204.00 194.00 200.80 215.50 219.20 220.20 225.80 2

1959 210.00 207.00 218.50 245.00 259.20 256.50 243.00 221.20 220.80 2

1960 220.00 238.80 241.50 249.80 270.80 286.50 280.20 263.20 247.80

1961 210.00

2

207.00 204.00 196.00 236.80 251.80 261.20 256.20 250.20 2

JAN FEB MAR APR MAY JUN JUL AUG SEP 
Basis of Comparison, IJC Phase II Levels Reference St

Lake Ontario Monthly Mean Outflows, TCFS, Without Deviat

JAN

1962 210.00

1963 210.00

1964 210.00

1965 210.00

1966 210.00

1967 210.00

1968 220.00

1969 220.00

1970 214.00

1971 220.00

1972 220.00

1973 220.00

z 1974 220.00

1975 220.00

1976 220.00

1977 220.00

1978 220.00

1979 220.00

1980 220.00

1981 220.00

1982 220.00

1983 220.00

1984 220.00

1985 220.00

1986 220.00

1987 220.00

1988 220.00

1989 220.00

===========-.----- _---mm

Average 214.96

Std.Dev 4.79

Maximum 220.00

Minimum 210.00

207.00

207.00

207.00

207.00

207.00

207.00

247.80

253.50

231.00

249.20

247.00

260.00

260.00

260.00

260.00

255.20

260.00

247.80

256.50

247.00

255.20

257.50

260.00

257.90

260.00

260.00

258.80

227.80 ______--__---

_-____-__-__--_-- -----

-----------====================---------------------------

______

_-_-_--_---

230.13 237.09 246.69 255.61 260.24 262.55 262.98 259.99 

20.88 26.27 35.96 36.96 35.99 33.48 31.77 29.75 

260.00 280.00 307.50 310.00 310.00 310.00 310.00 310.00 

207.00 204.00 188.00 188.00 192.80 201.00 203.20 202.80 

FEB MAR APR MAY JUN JUL AUG SEP 

204.00 189.80 203.00 213.20 216.20

204.00 188.00 192.80 208.20 210.50

204.00 188.00 188.00 196.50 201.80

204.00 188.00 188.00 192.80 201.00

214.20 215.80 198.80 209.80 215.50

204.00 198.80 204.50 214.20 229.20

247.80 259.80 244.20 241.50 252.00

251.00 258.50 270.20 286.20 294.20

233.00 241.80 252.80 251.50 260.20

260.00 272.50 285.80 277.80 264.50

252.00 266.00 288.80 299.00 303.80

280.00 307.50 310.00 310.00 310.00

280.00 307.00 310.00 310.00 310.00

280.00 303.00 308.80 309.80 309.50

280.00 307.50 310.00 310.00 310.00

266.80 278.50 289.80 292.50 282.50

280.00 300.80 310.00 307.20 309.20

263.20 284.50 294.20 294.20 280.80

264.00 286.00 298.00 298.80 292.50

266.50 263.00 253.20 252.80 262.00

260.50 288.00 292.50 295.20 294.00

270.00 276.00 292.20 298.50 289.20

280.00 297.80 310.00 310.00 309.50

280.00 302.20 306.20 307.00 305.80

280.00 307.50 310.00 310.00 310.00

280.00 307.50 310.00 310.00 310.00

273.50 276.50 283.80 305.80 293.20

221.80 233.50 241.00 267.80 283.00

220.50 221.20 2

215.20 214.20 2

203.20 204.20 1

204.80 208.20 2

217.20 219.20 2

242.20 241.50 

258.80 266.20 

291.20 273.00 

266.20 261.20 

258.20 265.80 

310.00 304.50 

310.00 310.00 

310.00 310.00 

310.00 310.00 

310.00 310.00 

284.20 293.80 

300.50 290.00 

276.20 284.80 

294.50 293.50 

278.00 296.50 

277.50 273.20 

281.50 27'7.20 

310.00 309.20 

299.20 300.00 

310.00 310.00 

310.00 310.00 

283.80 271.80 

276.20 264.80 
Basis of Compa rison, IJC Phase II Levels Reference St

Ogdensbu rgf Month ly Mean Levels, IGLD 1955, Without Devi

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1900 243.63 243.74 243.88 244.57 244.92 245.00 244.96 244.78 244.16 

1901 243.08 242.90 242.97 244.23 244.80 244.94 244.70 244.34 243.85 

1902 243.09 243.01 243.58 244.14 244.44 244.94 245.59 245.15 244.27 

1903 242.93 243.09 243.78 244.72 244.62 244.59 244.82 244.58 243.99 

1904 242.32 242.62 243.22 244.56 245.24 245.54 245.40 244.74 244.02 

1905 242.56 242.35 242.58 243.82 244.44 244.88 244.94 244.60 243.90 

1906 243.28 243.22 243.12 243.66 244.23 244.76 244.94 244.54 243.87 

1907 243.64 243.52 243.34 243.84 244.36 244.77 244.82 244.51 243.90 

1908 243.58 243.44 243.74 244.52 245.13 245.25 244.96 244.40 243.59 

1909 242.24 242.47 242.97 243.78 244.81 244.99 244.72 244.29 243.72 

1910 242.73 242.89 243.46 244.00 244.60 244.79 244.70 244.45 244.00 

1911 242.65 242.79 243.06 243.96 244.84 245.29 245.44 245.15 244.84 

1912 243.91 243.68 243.66 244.65 245.49 246.03 245.52 244.80 244.27 

1913 243.79 243.94 243.75 244.86 245.12 245.10 244.79 244.37 243.74 

1914 242.94 242.96 243.02 244.05 244.64 244.77 244.58 244.30 243.95 

1915 242.53 242.94 243.23 243.58 244.18 244.44 244.55 244.85 244.33 

1916 243.19 243.24 243.24 244.18 244.90 245.67 245.62 244.57 243.72 

1917 242.82 242.91 243.31 244.33 244.55 244.95 245.22 244.64 243.85 

1918 242.91 242.86 243.42 244.02 244.22 244.42 244.50 244.19 243.82 

1919 243.25 243.01 243.07 243.69 244.62 245.13 244.74 244.09 243.58 

1920 242.65 242.58 242.87 243.76 244.42 244.81 245.22 244.94 244.32 

1921 243.55 243.20 243.43 243.97 244.38 244.54 244.51 244.18 243.82 

1922 243.05 243.12 243.51 244.42 244.96 245.06 245.01 244.44 243.80 

1923 242.40 242.34 242.73 243.78 244.57 245.12 244.99 244.67 244.28 

1924 243.55 243.49 243.47 244.19 244.96 245.15 244.96 244.60 244.01 

1925 242.17 242.16 243.10 243.68 243.96 244.12 244.04 243.82 243.48 

1926 242.63 242.35 242.31 243.42 244.44 244.73 244.74 244.62 244.50 

1927 243.42 243.06 243.26 243.66 244.04 244.70 244.99 244.75 244.22 

1928 244.56 244.44 244.24 244.74 245.00 245.15 245.23 244.88 244.05 

1929 243.42 243.46 243.61 244.71 245.56 245.66 245.42 244.71 244.00 2

1930 243.63 244.09 244.60 244.94 245.04 245.07 244.95 244.30 243.67 2

1931 242.51 242.42 242.61 243.54 244.39 245.00 245.10 244.87 244.52 2
1932 243.94 244.24 244.22 244.74 245.04 245.14 245.29 245.23 244.81 

1933 244.00 243.94 244.06 245.04 245.50 245.55 245.48 245.14 244.75 

1934 243.32 243.13 243.09 243.96 244.70 244.87 244.88 244.45 244.06 

1935 242.60 242.38 242.41 242.91 243.47 244.00 244.35 244.10 243.61 

1936 242.10 241.64 242.12 243.99 244.58 244.58 244.35 243.88 243.50 

1937 242.81 243.34 243.39 244.02 244.92 245.39 245.25 244.82 244.26 

1938 243.18 243.51 243.80 244.32 244.54 244.86 244.93 245.02 244.66 

1939 242.81 242.77 243.31 244.26 244.78 244.77 244.76 244.74 244.35 

1940 242.67 242.32 242.30 243.48 244.57 244.86 244.82 244.36 243.90 

1941 243.50 243.40 243.36 244.18 244.78 244.91 244.89 244.64 244.25 

1942 243.25 243.18 243.70 244.66 245.00 245.18 244.98 244.65 244.09 

1943 243.50 243.47 243.65 244.26 245.20 246.02 245.73 245.06 244.18 

1944 242.75 242.69 242.88 243.72 244.58 244.85 244.74 244.24 243.74 

1945 242.72 242.72 243.44 244.31 244.85 245.14 244.95 244.38 243.82 

1946 243.51 243.31 243.49 243.42 243.70 244.30 244.44 244.18 243.69 

1947 243.10 243.26 243.22 244.18 245.00 245.98 245.93 245.40 244.47 

1948 242.94 242.82 243.29 244.23 244.62 244.74 244.56 244.15 243.61 

1949 243.06 243.30 243.54 244.02 244.36 244.61 244.64 244.26 243.87 

1950 243.36 243.72 243.83 244.82 244.93 244.90 244.77 244.48 244.00 

1951 243.60 243.62 244.08 245.08 245.51 245.19 245.00 244.43 243.82 

1952 243.62 244.09 244.30 245.06 245.38 245.44 244.98 244.44 243.82 

1953 243.16 243.18 243.36 243.97 244.60 244.87 244.65 244.26 243.77 

1954 242.94 243.15 243.80 244.51 245.22 245.04 244.66 244.21 243.82 

1955 243.82 243.55 243.93 244.76 244.87 244.72 244.51 244.19 243.65 

1956 242.82 242.75 243.04 243.79 244.72 244.92 244.54 244.11 243.75 

1957 242.84 242.98 243.25 243.76 244.42 244.98 245.15 244.59 244.02 

1958 243.18 243.19 243.54 244.44 245.14 245.46 245.49 245.37 245.17 

1959 243.25 243.42 243.75 244.70 245.06 244.98 244.85 244.57 244.08 

1960 243.82 243.84 243.80 244.64 245.41 245.44 244.98 244.47 243.84 

1961 242.09 241.74 242.48 243.50 244.35 244.75 244.69 244.20 243.71 

JAN FEB MAR APR MAY JUN JUL AUG SEP 

Basis of Comparison, IJC Pha se II Leve 1s Reference St

Ogdensburg, Monthly Mean Levels , IGLD 195 5, Without Dev
Basis of Comparison, IJC Phase II Levels Reference S

Ogdensburg, Monthly Mean Levels, IGLD 1955, Without Dev

i962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

---------- ---------e

Average

Std.Dev

Maximum

Minimum

JAN FEB MAR APR MAY JUN JUL AUG SEP 

242.35 242.25 242.52 243.70 244.43 244.66 244.53 244.41 243.96 

242.89 242.44 242.35 243.59 244.58 244.90 244.76 244.58 244.06 

242.32 242.03 242.01 242.88 243.67 244.04 244.01 243.69 243.24 

240.88 240.68 240.90 241.59 242.47 242.75 242.86 242.62 242.37 

242.26 242.23 242.75 243.22 243.72 244.10 244.04 243.73 243.38 

243.00 243.14 243.16 244.09 244.91 245.42 245.58 245.29 244.74 

244.07 243.94 243.81 244.34 244.50 244.92 245.02 244.64 244.12 

243.46 243.49 243.24 243.94 244.63 244.98 244.73 244.24 243.54 

243.02 243.06 243.20 243.94 244.53 244.73 244.81 244.46 243.88 

243.50 243.29 243.62 244.23 244.73 244.68 244.54 244.19 243.88 

243.23 243.16 243.31 244.08 244.92 245.06 245.34 244.95 244.16 

245.13 245.78 246.24 247.32 247.76 248.10 247.97 247.44 246.62 

246.28 246.83 247.21 247.80 248.46 248.84 248.83 248.38 247.52 

246.51 246.76 247.10 247.62 247.88 247.91 247.43 246.60 245.88 

245.44 245.66 246.80 247.76 248.50 248.94 249.13 248.90 248.16 

246.11 245.48 245.65 246.39 246.47 245.94 245.68 245.26 244.72 

245.82 246.18 245.87 246.66 247.04 246.76 245.99 245.18 244.41 

243.44 243.47 243.85 244.80 245.10 245.04 244.75 244.40 244.08 

244.19 243.94 243.78 244.75 245.12 245.00 244.84 244.54 243.88 

243.32 243.23 243.79 243.85 244.24 244.62 244.73 244.54 244.11 

243.86 243.62 243.66 244.43 244.74 244.90 244.68 244.18 243.70 

244.06 244.07 243.94 244.29 245.05 245.14 244.68 244.34 243.82 

244.35 244.49 244.91 245.60 246.22 246.42 246.16 245.54 244.74 

244.22 244.18 244.89 245.55 245.63 245.54 245.27 244.68 244.15 

245.14 245.80 246.30 247.16 247.50 247.92 248.18 248.20 248.04 

250.18 250.64 250.88 251.65 251.71 251.49 251.18 250.34 249.47 

247.96 247.96 247.72 248.11 248.09 247.45 246.62 245.84 244.98 

243.44 243.24 243.23 244.00 244.72 245.21 245.00 244.38 243.80 

:==============================================================================

243.48 243.49 243.73 244.51 245.06 245.28 245.19 244.80 244.25 

1.27 1.36 1.36 1.33 1.24 1.17 1.13 1.09 1.03 

250.18 250.64 250.88 251.65 251.71 251.49 251.18 250.34 249.47 

240.88 240.68 240.90 241.59 242.47 242.75 242.86 242.62 242.37 
,_, 

__?._ __ _ . . __. __I - ..--. I-__-_.~X-a-~-_X _

Ca

Basis of Comparison, IJC Pha se II Levels Reference Stu

rdinal, Monthly Mean Levels, IGLD 1955, Without Deviat

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1900 242.49 242.58 242.52 243.20 243.51 243.70 243.66 243.47 242.64 2

1901 241.81 241.60 241.80 242.88 243.30 243.41 243.10 242.82 242.24 2

1902 241.85 241.80 242.30 242.77 243.27 243.96 244.38 243.38 242.34 2

1903 241.68 241.70 242.22 243.08 242.89 243.09 243.38 242.98 242.14 2

1904 240.94 241.34 241.88 242.97 243.57 243.86 243.61 242.63 241.84 2

1905 241.24 241.03 241.33 242.66 243.15 243.44 243.24 242.68 241.78 2

1906 241.96 241.60 241.55 242.30 243.06 243.63 243.59 242.96 242.21 2

1907 242.39 241.80 241.60 242.19 242.92 243.38 243.34 242.81 242.08 2

1908 242.32 241.74 241.96 242.69 243.27 243.36 242.98 242.28 241.64 2

1909 240.85 241.17 241.64 242.50 243.24 243.33 242.96 242.46 241.97 2

1910 241.44 241.67 242.14 242.64 243.18 243.40 243.35 243.00 242.39 2

1911 241.34 241.55 241.89 243.07 243.97 244.37 244.48 244.12 243.76 2

1912 242.72 242.39 242.38 243.36 244.10 244.60 243.82 243.00 242.48 2

1913 242.57 242.30 241.98 243.09 243.31 243.22 242.97 242.61 241.91 2

1914 241.67 241.50 241.68 242.61 243.10 243.20 243.03 242.80 242.26 2

1915 241.20 241.65 241.81 242.44 243.28 243.39 243.45 243.63 242.61 2

1916 241.90 241.68 241.70 242.62 243.27 244.02 243.76 242.41 241.73 2

1917 241.55 241.64 241.96 242.76 242.93 243.34 243.42 242.48 241.58 2

1918 241.54 241.37 241.68 242.13 242.46 242.88 243.00 242.58 242.07 2

1919 241.93 241.31 241.36 242.04 242.95 243.28 242.73 242.02 241.66 2

1920 241.34 241.30 241.64 242.60 243.35 243.78 244.16 243.46 242.58 2

1921 242.28 241.55 241.72 242.29 242.82 243.13 243.18 242.84 242.49 2

1922 241.82 241.94 242.16 243.00 243.43 243.48 243.23 242.66 242.00 2

1923 241.04 241.02 241.51 242.81 243.64 243.94 243.70 243.42 243.01 2

1924 242.30 242.13 242.18 243.02 243.67 243.75 243.49 243.03 242.42 2

1925 240.77 240.80 241.87 242.35 242.74 243.04 242.89 242.61 242.19 2

1926 241.32 241.03 241.01 242.49 243.49 243.76 243.70 243.53 243.35 2

1927 242.14 241.50 241.68 242.15 242.85 243.67 243.98 243.44 242.85 2

1928 243.47 242.94 242.66 243.21 243.50 243.80 243.75 243.18 242.16 2

1929 242.14 241.76 241.86 242.95 243.75 243.82 243.52 242.56 241.90 2

1930 242.38 242.45 242.80 243.04 243.12 243.26 243.12 242.48 241.83 24

1931 241.18 241.10 241.38 242.62 243.50 243.98 244.07 243.80 243.38 2
JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 242.82 242.88 242.82 243.34 243.64 243.95

1933 242.92

244.28 244.16 243.72 2

242.88 243.06 244.07 244.31 244.45 244.51 244.12 243.66 2

1934 242.13 241.95 241.94 243.11 243.92 244.05 244.00 243.50 243.08 2

1935 241.28 241.06 241.13 241.91 242.54 243.09 243.38 243.04 242.49 2

1936 240.68 240.16 240.79 243.02 243.53 243.52

1937 241.54

243.30 242.75 242.32 2

242.13 242.04 243.07 243.84 244.34

1938 241.96

243.96 243.42 242.94 2

242.30 242.42 242.91 243.20 243.82 243.88 243.95 243.41 2

1939 241.54 241.52 242.19 243.06 243.41 243.45

1940 241.37

243.58 243.66 243.20 2

241.00 241.00 242.56 243.49 243.57

1941 242.23

243.42 242.88 242.60 2

242.04 242.12 243.32 243.97 243.99

1942 242.05

243.92 243.60 243.14 2

242.01 242.58 243.37 243.67 243.75 243.61 243.18 242.54 2

1943 242.22 241.86 241.96 242.62 243.55 244.30

1944 241.46

243.88 242.96 241.95 2

241.33 241.53 242.43 243.17 243.36

1945 241.42

243.09 242.59 242.10 2

241.46 242.21 242.77 243.24 243.42

1946 242.24

243.10 242.39 241.89 2

241.60 241.72 241.60 242.30 243.03

1947 241.81

243.09 242.72 242.13 2

241.64 241.66 242.59 243.31 244.26

1948 241.68

244.13 243.40 242.22 2

241.40 241.83 242.55 242.83 242.92

1949 241.79

242.83 242.45 241.92 2

241.88 242.04 242.55 243.03 243.52 243.56 243.09 242.63 2

1950 242.17 242.32 242.39 243.23 243.23 243.34 243.29 243.00 242.36 2

1951 242.35 241.92 242.28 243.32 243.69 243.17

1952 242.37

243.04 242.52 241.88 2

242.44 242.46 243.20 243.48 243.48

1953 241.82

242.98 242.48 241.80 2

241.56 241.74 242.30 243.02 243.16 242.98 242.49 241.99 2

1954 241.69 241.82 242.20 242.90 243.46 243.19 242.90 242.59 242.12 2

1955 242.61 241.84 242.14 242.92 242.95 242.93 242.92 242.55 241.93 2

1956 241.54 241.37 241.48 242.19 242.99 243.08

1957 241.56

242.64 242.27 241.86 2

241.62 241.86 242.48 243.30 243.92 243.80 243.06 242.47 2

1958 241.96 242.02 242.45 243.58 244.31 244.54 244.53 244.40 244.10 2

1959 242.05 242.28 242.54 243.36 243.62 243.56 243.56 243.46 242.90 2

1960 242.60 242.40 242.32 243.23 243.91 243.75

1961 240.67

243.26 242.85 242.28 2

240.29 241.22 242.50 243.04 243.34 243.15 242.60 242.09 2

Ca

Basis of Comparison, IJC P hase II Levels Reference St

rdinal, Monthly Mean Level s, IGLD 1955, Without Devia
1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

%

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

=========

Average

Std.Dev

Maximum

Minimum

240.98

241.63

240.96

239.18

240.87

241.75

242.90

242.18

241.72

242.22

241.90

244.12

245.41

245.67

244.47

245.23

244.89

242.15

243.04

242.02

242.66

242.88

243.22

243.07

244.14

249.66

247.26

242.16

JAN FEB

-------- -----w-v

242.25

1.42

249.66

239.18

Basis of Comparison, IJC Phase II Level s Reference Stu

Cardinal, Monthly Mean Levels, IGLD 1955, Without Deviat

APR MAY JUN JUL

240.90 241.26 242.79 243.49 243.65

241.14 241.06 242.69 243.75 243.98

240.64 240.66 241.88 242.78 243.11

238.97 239.30 240.38 241.40 241.67

240.88 241.41 241.94 242.72 243.05

241.95 242.02 243.14 244.02 244.50

242.41 242.24 242.74 243.12 243.65

241.77 241.50 242.26 242.96 243.18

241.56 241.70 242.49 243.06 243.32

241.58 241.84 242.43 242.88 242.92

241.45 241.58 242.34 243.07 243.12

244.46 244.80 245.80 246.30 246.70

245.69 245.94 246.38 247.13 247.58

245.61 245.82 246.22 246.46 246.48

244.32 245.46 246.34 247.18 247.69

244.16 244.24 245.00 244.96 244.29

244.93 244.35 245.09 245.44 245.13

241.82 242.08 242.98 243.23 243.15

242.28 241.99 242.90 243.21 243.04

241.54 241.97 242.09 242.70 243.17

241.91 241.88 242.47 242.80 242.96

242.43 242.10 242.46 243.20 243.23

242.92 243.18 243.81 244.42 244.68

242.56 243.15 243.70 243.74 243.62

244.49 244.86 245.61 246.00 246.49

249.94 250.09 250.77 250.82 250.58

246.98 246.60 247.02 246.93 245.98

241.82 241.88 242.66 243.42 243.70

.--------------------------------------== .----__------------_----

242.08 242.28 243.10 243.64 243.86

1.44 1.41 1.34 1.26 1.21

249.94 250.09 250.77 250.82 250.58

238.97 239.30 240.38 241.40 241.67

243.47

243.79

243.02

241.71

242.91

244.54

243.65

242.76

243.30

242.92

243.42

246.55

247.56

245.92

247.91

244.09

244.16

242.97

242.92

243.19

242.70

242.76

244.36

243.29

246.80

250.24

245.10

243.26

:========

243.72

1.20

250.24

241.71

243.28 242.76 24

243.54 242.94 24

242.64 242.10 24

241.38 241.03 24

242.53 242.09 24

244.08 243.44 24

243.10 242.38 2

242.17 241.55 24

242.80 242.16 2

242.57 242.08 2

242.82 241.87 2

245.92 244.92 2

247.04 246.01 2

244.91 244.00 24

247.64 246.77 24

243.57 242.75 2

243.25 242.41 24

242.60 242.06 2

242.51 241.67 2

242.75 241.92 2

242.30 241.75 24

242.44 241.85 2

243.58 242.55 24

242.63 241.93 24

246.83 246.63 24

249.29 248.30 24

244.27 243.37 24

242.56 242.01 24

====================

243.24 242.61 24

1.19 1.15 

249.29 248.30 24

241.38 241.03 24
1900

1901

1902

1903

1904

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

JAN FEB MAR APR MAY JUN JUL AUG SEP 

242.16 242.24

241.44 241.21

242.10 242.76 243.05 243.28 243.25 243.04 242.16 2

241.49 241.46

241.46 242.45 242.81 242.90 242.58 242.33 241.73 2

241.32 241.29

241.92 242.34 242.90 243.65 243.98 242.78 241.70 2

240.55 240.98

241.73 242.54 242.31 242.60 242.91 242.45 241.54 2

240.86 240.65

241.49 242.45 243.00 243.27 242.99 241.91 241.11 2

241.57 241.10

240.98 242.31 242.74 242.96 242.67 242.03 241.09 2

242.02 241.27

241.08 241.89 242.70 243.28 243.14 242.44 241.69 2

241.93 241.20

241.06 241.66 242.46 242.93 242.85 242.25 241.49 2

240.45 240.80

241.40 242.08 242.63 242.70 242.31 241.57 241.02 2

241.06 241.32

241.26 242.11 242.71 242.77 242.38 241.86 241.42 2

240.97 241.19

241.75 242.22 242.72 242.94 242.92 242.53 241.87 2

242.35 241.99

241.55 242.81 243.71 244.08 244.18 243.78 243.42 2

242.20 241.77

242.00 242.95 243.62 244.11 243.24 242.40 241.90 2

241.30 241.07

241.41 242.49 242.69 242.56 242.36 242.03 241.33 2

240.82 241.28

241.28 242.16 242.59 242.69 242.52 242.32 241.72 2

241.52 241.20

241.38 242.11 243.02 243.07 243.10 243.24 242.05 2

241.18 241.27

241.23 242.12 242.73 243.45 243.12 241.67 241.09 2

241.14 240.92

241.56 242.25 242.40 242.80 242.80 241.75 240.82 2

241.54 240.79

241.14 241.52 241.89 242.38 242.50 242.07 241.52 2

240.97 240.94

240.83 241.52 242.39 242.65 242.05 241.34 241.04 2

241.90 241.04

241.28 242.24 243.02 243.46 243.82 242.98 242.02 2

241.46 241.59

241.20 241.75 242.32 242.68 242.75 242.42 242.08 2

240.66 240.64

241.74 242.54 242.92 242.95 242.62 242.08 241.42 2

241.93 241.71

241.16 242.54 243.36 243.56 243.29 243.02 242.62 2

240.37 240.42

241.80 242.66 243.25 243.28 243.01 242.52 241.92 2

240.94 240.65

241.51 241.94 242.38 242.70 242.54 242.24 241.80 2

241.75 241.04

240.64 242.22 243.20 243.46 243.37 243.19 242.98 24

243.13 242.45

241.20 241.68 242.48 243.36 243.67 243.02 242.42 24

241.75 241.23

242.14 242.71 242.99 243.36 243.25 242.60 241.54 24

242.00 241.92

241.32 242.37 243.12 243.17 242.86 241.82 241.21 24

240.80 240.73

242.21 242.40 242.46 242.64 242.49 241.88 241.24 24

241.02 242.36 243.24 243.67 243.74 243.46 243.02 24

Basis o f Compar ison, IJC Ph

Iroquois, Monthly Mean Levels

a se II Leve

IGLD 1955

1 s Reference Stu

Without Devia
Basis

Ir oquois

of Comparison,

, Monthly Mean

IJC Phase II

Levels, IGLD

Levels Reference S

1955, Without Dev

JAN

1932 242.49 242.46 242.38 242.88 243.17 243.56 243.96 243.83 243.38 

1933 242.58 242.56 242.76 243.77 243.92 244.09 244.20 243.80 243.33 

1934 241.78 241.61 241.60 242.86 243.69 243.80 243.73 243.22 242.78 

1935 240.90 240.68 240.77 241.64 242.28 242.83 243.08 242.72 242.16 

1936 240.28 239.75 240.42 242.74 243.21 243.20 242.97 242.42 241.96 

1937 241.17 241.77 241.64 242.79 243.51 244.01 243.52 242.96 242.52 

1938 241.60 241.94 241.99 242.46 242.76 243.49 243.55 243.61 243.02 

1939 241.17 241.16 241.86 242.69 242.97 243.03 243.21 243.32 242.85 

1940 240.99 240.62 240.64 242.30 243.16 243.15 242.97 242.40 242.19 

1941 241.84 241.62 241.75 243.08 243.73 243.71 243.63 243.28 242.80 

1942 241.70 241.66 242.25 242.96 243.24 243.28 243.16 242.70 242.05 

1943 241.84 241.36 241.43 242.09 243.00 243.68 243.22 242.23 241.21 

1944 241.09 240.93 241.13 242.04 242.72 242.87 242.54 242.05 241.58 

1945 241.04 241.10 241.84 242.27 242.71 242.83 242.46 241.73 241.27 

1946 241.86 241.06 241.17 241.02 241.88 242.63 242.66 242.26 241.64 

1947 241.43 241.15 241.18 242.08 242.74 243.64 243.50 242.70 241.46 

1948 241.31 240.99 241.39 242.00 242.24 242.31 242.26 241.90 241.38 

1949 241.42 241.45 241.58 242.09 242.61 243.18 243.22 242.73 242.25 

1950 241.82 241.89 241.94 242.70 242.66 242.82 242.80 242.52 241.84 

1951 241.97 241.39 241.70 242.73 243.06 242.46 242.36 241.88 241.24 

1952 241.99 241.92 241.85 242.57 242.82 242.80 242.29 241.82 241.15 

1953 241.42 241.06 241.24 241.76 242.51 242.58 242.43 241.91 241.42 

1954 241.32 241.42 241.69 242.38 242.86 242.56 242.31 242.07 241.58 

1955 242.24 241.31 241.56 242.31 242.29 242.33 242.40 242.02 241.39 

1956 241.18 240.97 241.00 241.68 242.41 242.46 242.01 241.68 241.26 

1957 241.20 241.22 241.43 242.08 242.96 243.58 243.36 242.56 241.98 

1958 241.61 241.68 242.14 243.33 244.05 244.24 244.23 244.08 243.77 

1959 241.70 241.95 242.17 242.92 243.14 243.08 243.14 243.11 242.54 

1960 242.23 241.95 241.85 242.78 243.40 243.17 242.68 242.33 241.79 

1961 240.26 239.89 240.86 242.21 242.62 242.87 242.64 242.10 241.58 

FEB MAR APR MAY JUN JUL AUG SEP 
Ir

Basis o f Comparison, IJC Phase II Level

oquois, Monthly Mean Levels,

.s Reference S

IGLD 1955, Without Devi

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

=========

Average

Std.Dev

Maximum

Minimum

240.59

241.26

240.56

238.72

240.48

241.39

242.54

241.79

241.35

241.84

241.51

243.80

245.13

245.40

244.16

244.94

244.60

241.77

242.68

241.63

242.29

242.52

242.87

242.71

243.81

249.48

247.03

241.77

========

241.88

1.45

249.48

238.72

240.52

240.76

240.26

238.51

240.50

241.61

241.93

241.24

241.11

241.05

240.93

244.01

245.29

245.20

243.87

243.73

244.50

241.32

241.76

241.02

241.38

241.90

242.40

242.04

244.04

249.68

246.63

241.40

.------__ ------__

241.65

1.46

249.68

238.51

JAN FEB MAR APR MAY JUN JUL AUG SEP 

240.91

240.70

240.28

238.87

241.02

241.68

241.76

240.96

241.24

241.28

241.03

244.30

245.49

245.35

244.98

243.77

243.83

241.52

241.42

241.38

241.32

241.51

242.60

242.57

244.36

249.78

246.19

241.48

-----___ --a---__

241.83

1.41

249.78

238.87

242.53

242.43

241.60

240.05

241.56

242.86

242.22

241.73

242.03

241.84

241.78

245.24

245.85

245.69

245.80

244.50

244.52

242.37

242.28

241.52

241.82

241.86

243.18

243.04

245.04

250.40

246.62

242.24

.-a--

.----====

242.64

1.34

250.40

240.05

243.21

243.51

242.52

241.11

242.44

243.74

242.67

242.41

242.58

242.26

242.45

245.76

246.62

245.92

246.67

244.43

244.84

242.59

242.56

242.22

242.14

242.57

243.78

243.08

245.43

250.45

246.50

243.00

---es---_ ---m---e_

243.17

1.26

250.45

241.11

243.34

243.68

242.84

241.37

242.73

244.21

243.24

242.57

242.86

242.34

242.45

246.17

247.09

245.94

247.20

243.71

244.54

242.51

242.37

242.70

242.31

242.57

244.06

242.94

245.95

250.20

245.43

243.19

w-s-- -----===

243.38

1.22

250.20

241.37

243.14

243.50

242.73

241.38

242.57

244.21

243.20

242.10

242.81

242.38

242.74

246.01

247.07

245.35

247.44

243.54

243.50

242.38

242.28

242.68

242.04

242.12

243.72

242.60

246.27

249.85

244.56

242.67

==z=====

243.23

1.23

249.85

241.38

242.94

243.21

242.33

241.03

242.17

243.68

242.61

241.49

242.25

242.05

242.09

245.36

246.52

244.29

247.15

242.98

242.59

242.00

241.83

242.15

241.68

241.82

242.89

241.94

246.30

248.87

243.73

241.97

-----___ ---m--w_

242.72

1.23

248.87

241.03

242.39

242.61

241.77

240.65

241.70

243.02

241.82

240.91

241.60

241.51

241.11

244.31

245.46

243.34

246.24

242.08

241.74

241.40

240.95

241.20

241.12

241.21

241.80

241.19

246.10

247.83

242.83

241.44

-----___

242.07

1.20

247.83

240.65
-. -------

1900 241.68 241.74 241.49 242.12 242.38 242.68 242.66 242.44 241.43 2

1901 240.89 240.65 240.97 241.83 242.09 242.15 241.79 241.61 240.96 2

1902 240.96 240.95 241.36 241.71 242.40 243.24 243.41 241.86 240.72 2

1903 240.78 240.68 241.00 241.73 241.44 241.88 242.22 241.66 240.61 2

1904 239.97 240.44 240.90 241.68 242.16 242.40 242.06 240.78 239.96 2

1905 240.29 240.09 240.46 241.82 242.16 242.28 241.82 241.04 239.99 2

1906 241.00 240.34 240.36 241.29 242.18 242.79 242.50 241.68 240.89 2

1907 241.47 240.45 240.22 240.87 241.78 242.28 242.14 241.41 240.58 2

1908 241.38 240.38 240.52 241.15 241.66 241.70 241.26 240.45 240.04 2

1909 239.86 240.25 240.68 241.54 241.94 241.94 241.49 240.93 240.57 2

1910 240.52 240.80 241.16 241.61 242.06 242.28 242.28 241.84 241.10 2

1911 240.42 240.67 241.07 242.47 243.36 243.70 243.77 243.34 242.95 2

1912 241.83 241.42 241.44 242.36 242.95 243.40 242.36 241.49 241.00 2

1913 241.67 240.98 240.54 241.58 241.74 241.58 241.42 241.14 240.42 

1914 240.76 240.41 240.70 241.49 241.84 241.93 241.76 241.61 240.89 2

1915 240.26 240.73 240.75 241.63 242.66 242.63 242.63 242.68 241.20 2

1916 240.96 240.48 240.52 241.38 241.92 242.60 242.14 240.52 240.08 2

1917 240.64 240.73 240.97 241.48 241.60 242.00 241.87 240.60 239.63 2

1918 240.55 240.25 240.30 240.56 241.02 241.64 241.78 241.29 240.66 2

1919 240.96 239.99 240.02 240.72 241.56 241.69 241.00 240.27 240.08 2

1920 240.42 240.40 240.76 241.75 242.57 243.03 243.36 242.26 241.16 2

1921 241.35 240.26 240.38 240.94 241.57 242.02 242.14 241.81 241.48 2

1922 240.94 241.10 241.14 241.87 242.17 242.16 241.71 241.18 240.54 2

1923 240.08 240.08 240.65 242.15 242.98 '243.04 242.69 242.46 242.05 

1924 241.39 241.10 241.23 242.15 242.65 242.61 242.30 241.75 241.16 2

1925 239.76 239.84 240.99 241.34 241.85 242.24 242.04 241.71 241.24 2

1926 240.38 240.09 240.10 241.8t1 242.81 243.06 242. 93 242.72 242.48 2

1927 241.19 240.32 240.46 240.98 241.96 242.92 243.24 242.42 241.80 2

1928 242.66 241.73 241.38 241.97 242.26 242.72 242.52 241.74 240.58 2

1929 241.19 240.41 240.47 241.48 242.16 242.20 241.85 240.66 240.12 2

1930 241.46 241.13 241.30 241.42 241.46 241.71 241.55 240.96 240.34 2

1931 240.23 240.18 240.51 242.01 242.88 243.24 243.30 243.00 242.53 2

JAN FEB MAR APR MAY JUN JUL AUG SEP 

Basis of Compari son,

Morrisburg, Monthly Mean

I JC Phase II Leve 1s Reference Stu

Levels, IGLD 195 5, Without Devi
Mor

Basis of Compa rison, IJC Phase II Levels Reference

risbu

Stud

cl, Month ly Mean Levels, IGLD 1955, Without Deviat

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 242.02 241.83 241.74 242.23 242.50 243.03 243.52 243.36 242.90 24

1933 242.12 242.12 242.35 243.37 243.38 243.60 243.78 243.36 242.86 24

1934 241.28 241.12 241.12 242.53 243.40 243.48 243.37 242.84 242.38 24

1935 240.34 240.12 240.24 241.25 241.93 242.48 242.69 242.27 241.69 24

1936 239.67 239.12 239.86 242.35 242.76 242.75 242.53 241.95 241.46 24

1937 240.62

241.25 241.04 242.42 243.05 243.55 242.92 242.31 241.92 24

1938 241.10 241.43 241.36 241.80 242.14 243.04 243.10 243.15 242.45 24

1939 240.62 240.64 241.40 242.17 242.33 242.42 242.68 242.86 242.35 24

1940 240.43 240.05 240.10 241.94 242.70 242.55 242.32 241.71 241.61 24

1941 241.29241.02 241.22 242.75 243.42 243.33 243.22 242.84 242.34 24

1942 241.19 241.18 241.79 242.36 242.62 242.60 242.51 242.00 241.31 24

1943 241.28 240.61 240.62 241.30 242.16 242.78 242.24 241.10 240.03 23

1944 240.54 240.34 240.55 241.47 242.06 242.15 241.73 241.25 240.79 24

1945 240.49240.58 241.32 241.54 241.92 241.96 241.50 240.70 240.30 23

1946 241.31 240.25 240.31 240.13 241.24 242.06 242.04 241.57 240.92 24

1947 240. aa 240.40 240.46 241.31 241.88 242.74 242.54 241.63 240.26 23

1948 240.77 240.37 240.73 241.17 241.34 241.38 241.40 241.07 240.57 24

1949 240.88 240.82 240.88 241.41 242.00 242.72 242.75 242.22 241.70 24

1950 241.32 241.26 241.28 241.92 241.79 242.05 242.09 241.82 241.05 24

1951 241.42 240.57 240.81 241.84 242.10 241.39 241.32 240.90 240.25 23

1952 241.44 241.12 240.92 241.60 241.82 241.75 241.23 240.81 240.12 23

1953 240.84240.30 240.48 240.96 241.75 241.72 241.60 241.03 240.54 24

1954 240.79 240.84 240.92 241.59 241.96 241.60 241.42 241.29 240.76 24

1955 241.71 240.49 240.67 241.37 241.29 241.42 241.63 241.22 240.56 24

1956 240.63 240.37 240.28 240.92 241.54 241.51 241.03 240.76 240.31 23

1957 240.66 240.63 240.81 241.51 242.48 243.12 242.72 241.82 241.24 24

1958 241.10 241.19 241.69 243.00 243.72 243.86 243.83 243.66 243.30 24

1959 241.19 241.48 241.65 242.30 242.45 242.40 242.54 242.64 242.02 24

1960 241.70 241.28 241.16 242.11 242.66 242.30 241.81 241.54 241.05 24

1961 239.66 239.27 240.34 241.82 242.02 242.20 241.89 241.33 240.81 24
- - _-. I-_R1__

1962 240.01 239.96 240.38 242.18 242.82 242.91 242.70 242.45 241.86 241

1963 240.72 240.21 240.16 242.08 243.19 243.31 243.10 242.77 242.14 241

1964 239.98 239.66 239.71 241.21 242.18 242.47 242.33 241.90 241.30 240

1965 237.97 237.77 238.19 239.57 240.69 240.94 240.91 240.51 240.08 239

1966 239.88 239.92 240.44 241.02 242.03 242.28 242.08 241.66 241.14 240

1967

1968 242.03 241.20 241.02 241.44 242.03 242.66 242.56 241.87 240.96 240

1969 241.24 240.41 240.14 240.92 241.58 241.65 241.07 240.42 239.92 239

1970

1971 241.28 240.24 240.41 240.94 241.31 241.45 241.59 241.27 240.62 239

1972 240.93 240.12 240.20 240.92 241.50 241.43 241.72 240.94 239.88 239

1973

1974 244.77 244.74 244.86 245.10 245.92 246.42 246.40 245.80 244.65 243

1975 245.05 244.66 244.71 244.94 245.16 245.18 244.54 243.38 242.33 241

1976

1977 244.57 243.10 243.08 243.81 243.66 242.86 242.74 242.12 241.06 240

1978 244.21 243.90 243.07 243.68 243.99 243.67 242.52 241.57 240.71 240

1979

1980 242.18 240.96 240.54 241.33 241.55 241.34 241.28 240.77 239.79 239

1981 241.06 240.22 249.48 240.66 241.48 242.01 241.93 241.24 240.05 239

1982

1983 242.01 241.11 240.59 240.94 241.60 241.56 241.13 240.85 240.21 239

1984 242.39 241.64 241.72 242.24 242.82 243.12 242.76 241.84 240.64 239

1985

1986 243.38 243.42 243.64 244.21 244.63 245.19 245.54 245.57 245.35 245

1987 249.28 249.36 249.40 249.96 249.99 249.73 249.36 248.32 247.22 246

1988 

1989 241.21 240.76 240.89 241.63 242.41 242.45 241.78 241.06 240.55 240

---------

--o---m--

Average

Std.Dev

Maximum

Minimum

Basis of Compa rison,

Morrisburg, Month ly Mea n

IJC Pha

Levels

se II Leve1s Re ference Study

IGLD 195 5, Wi thout Deviati

JAN FEB MAR APR MAY JUN JUL AUG SEP O

--------=========================================-------------------------------

----_---------_---------------

241.36 241.01 241.16 241.98 242.49 242.69 242.51 241.95 241.27 240.

1.52 1.50 1.43 1.37 1.32 1.29 1.32 1.34 1.32 1

249.28 249.36 249.40 249.96 249.99 249.73 249.36 248.32 247.22 246

237.97 237.77 238.19 239.57 240.69 240.94 240.91 240.27 239.63 239
Long

Basis of Compari son, IJC Pha se I I Leve 1 s Reference

Sault

Study

Dam, Month ly Mean Leve 1% IGLD 1 9 55, Without Devia

1900 241.28 241.34 240.98 241.59 241.82 242.18 242.17 241.94 240.84

1901 240.44 240.19 240.58 241.32 241.50 241.52 241.14 241.01 240.32

1902 240.52 240.54 240.90 241.20 241.98 242.90 242.95 241.11 239.90

1903 240.34 240.18 240.38 241.06 240.72 241.29 241.66 241.01 239.84

1904 239.48 240.00 240.42 241.04 241.46 241.69 241.29 239.84 239.00

1905 239.82 239.63 240.02 241.42 241.68 241.71 241.10 240.21 239.08

1906 240.52 239.71 239.76 240.79 241.76 242.38 241.98 241.04 240.23

1907 241.02 239.77 239.52 240.21 241.21 241.74 241.55 240.70 239.83

1908 240.94 239.70 239.80 240.38 240.85 240.87 240.39 239.52 239.23

1909 239.36 239.79 240.21 241.07 241.30 241.25 240.75 240.16 239.86

1910 240.06 240.38 240.69 241.10 241.50 241.74 241.77 241.27 240.46

1911 239.95 240.24 240.67 242.19 243.09 243.39 243.44 242.98 242.56

1912 241.40 240.94 240.97 241.87 242.40 242.82 241.64 240.73

1913

240.26

241.24 240.32 239.82 240.84 240.97 240.76 240.64 240.41 239.67

1914 240.32 239.87 240.21 240.94 241.22 241.30 241.14 241.02 240.21

1915 239.78 240.28 240.22 241.24 242.36 242.27 242.24 242.23 240.50

1916 240.50 239.88 239.93 240.77 241.25 241.90 241.32 239.55 239.24

1917 240.19 240.28 240.48 240.86 240.95 241.34 241.10 239.64 238.63

1918 240.06 239.69 239.60 239.77 240.30 241.03 241.18 240.65 239.94

1919 240.48 239.32 239.34 240.07 240.87 240.90 240.12 239.38 239.28

1920 239.95 239.95 240.34 241.34 242.20 242.67 242.98 241.68 240.44

1921 240.90 239.61 239.70 240.26 240.94 241.47 241.64 241.30 240.99

1922 240.51 240.69 240.64 241.32 241.55 241.52 240.96 240.44 239.80

1923 239.60 239.62 240.24 241.84 242.68 242.60 242.20 242.00 241.58

1924 240.94 240.60 240.77 241.73 242.16 242.06 241.72 241.11 240.53

1925 239.27 239.36 240.56 240.85 241.41 241.86 241.64 241.28 240.78

1926 239.92 239.63 239.65 241.57 242.50 242.73 242.57 242.34 242.06

1927 240.72 239.72 239.86 240.40 241.54 242.57 242.89 241.93 241.29

1928 242.28 241.14 240.74 241.36 241.65 242.19 241.93 241.02 239.78

1929 240.73 239.74 239.76 240.75 241.38 241.39 241.02 239.70 239.21

1930 241.01 240.47 240.54 240.60 240.62 240.94 240.76 240.20 239.58

1931 239.76 239.72 240.08 241.72 242.60 242.88 242.94 242.62 242.13

JAN FEB MAR APR MAY JUN JUL AUG SEP 

240

239

239

239

238

238

239

239

239

239

239

242

239

239

239

239

239

238

239

239

239

240

239

241

239

240

240

240

239

238

239

241
Long

Basis of Comparison, IJC Pha se I I Leve 1s Reference Stud

Sault Dam, Monthly Mean Leve 1st IGLD 1 955, Without Devi

JAN FEB MAR APR MAY JUN JUL AUG SEP 

1932 241.64 241.32 241.20 241.68 241.95 242.59 243.17 242.99 242.52 24

1933 241.75 241.76 242.02 243.04 242.94 243.19 243.45 243.00 242.48 24

1934 240.87 240.71 240.73 242.27 243.16 243.22 243.09 242.52 242.05 24

1935 239.88 239.66 239.80 240.93 241.64 242.19 242.36 241.91 241.30 24

1936 239.17 238.60 239.40 242.04 242.40 242.39 242.16 241.56 241.04 24

1937 240.18 240.82 240.55 242.11 242.68 243.18 242.41 241.76 241.42 24

1938 240.68 241.00 240.85 241.26 241.63 242.68 242.73 242.78 241.98 24

1939 240.17 240.21 241.02 241.73 241.80 241.92 242.25 242.49 241.94 24

1940 239.97 239.58 239.65 241.65 242.32 242.06 241.78 241.13 241.12 24

1941 240.83 240.51 240.78 242.48 243.16 243.03 242.90 242.47 241.94 24

1942 240.78 240.77 241.40 241.88 242.11 242.03 241.98 241.42 240.70 24

1943 240.83 239.98 239.94 240.64 241.48 242.03 241.42 240.17 239.05 23

1944 240.08 239.85 240.06 241.00 241.52 241.56 241.05 240.58 240.14 23

1945 240.03 240.14 240.88 240.93 241.26 241.22 240.71 239.84 239.49 23

1946 240.85 239.56 239.61 239.39 240.72 241.60 241.53 241.01 240.31 23

1947 240.42 239.77 239.86 240.67 241.17 241.99 241.76 240.74 239.26 23

1948 240.32 239.86 240.18 240.49 240.60 240.62 240.68 240.38 239.90 23

1949 240.44 240.30 240.30 240.85 241.50 242.34 242.37 241.80 241.26 24

1950 240.90 240.74 240.73 241.27 241.08 241.42 241.50 241.24 240.40 23

1951 240.98 239.89 240.06 241.10 241.31 240.48 240.45 240.09 239.43 23

1952 241.00 240.46 240.15 240.80 240.99 240.88 240.34 239.97 239.27 23

1953 240.35 239.66 239.85 240.28 241.12 241.00 240.92 240.30 239.81 23

1954 240.35 240.36 240.29 240.94 241.22 240.80 240.68 240.64 240.08 23

1955 241.28 239.81 239.93 240.59 240.45 240.66 240.98 240.56 239.86 23

1956 240.18 239.87 239.68 240.29 240.82 240.72 240.22 239.99 239.53 23

1957 240.21 240.13 240.29 241.04 242.09 242.74 242.20 241.21 240.63 240

1958 240.68 240.79 241.32 242.73 243.45 243.54 243.50 243.32 242.92 241

1959 240.78 241.08 241.22 241.78 241.88 241.84 242.05 242.24 241.60 24

1960 241.26 240.74 240.59 241.56 242.04 241.59 241.09 240.88 240.44 24

1961 239.15 238.75 239.90 241.49 241.52 241.65 241.27 240.70 240.18 24
Long

Basis of Compa rison, IJC Phase II Leve 1s Refe rence

Sault Dam, Monthly Me an Levels,

Stud

IGLD 1 955 , Without Devi

1962 239.52

1963 240.28

1964 239.49

1965 237.36

1966 239.39

1967 240.43

1968 241.62

1969 240.78

1970 240.34

1971 240.83

1972 240.45

1973 243.02

1974 244.48

1975 244.77

1976 243.42

1977 244.27

1978 243.89

1979 240.75

1980 241.78

1981 240.59

1982 241.33

1983 241.60

1984 241.99

1985 241.81

1986 243.03

1987 249.11

1988 246.52

1989 240.75

:================

Average 240.92

Std.Dev 1.58

Maximum 249.11

Minimum 237.36

239.48

239.75

239.18

237.16

239.45

240.70

240.60

239.72

239.86

239.56

239.45

242.86

244.30

244.20

242.70

242.58

243.41

239.89

240.30

239.56

239.86

240.46

241.01

240.62

242.90

249.10

245.80

240.23

239.95 241.90 242.52

239.72 241.80 242.93

239.24 240.89 241.90

237.62 239.17 240.35

239.96 240.56 241.70

240.82 242.18 243.09

240.40 240.80 241.50

239.44 240.24 240.90

240.00 240.80 241.30

239.69 240.20 240.52

239.51 240.20 240.70

242.98 243.76 244.35

244.34 244.48 245.34

244.19 244.34 244.54

243.77 244.42 245.40

242.51 243.24 243.02

242.44 243.00 243.28

239.94 240.67 240.80

239.81 240.54 240.71

239.73 239.94 240.87

239.74 239.96 240.29

239.83 240.17 240.80

241.00 241.47 242.03

240.96 241.25 241.24

243.05 243.54 243.97

249.10 249.60 249.62

245.19 245.65 245.45

240.40 241.13 241.92

.------------------------

240.61 241.43 241.93

1.47 1.42 1.38

249.10 249.60 249.62

237.62 239.17 240.29

mm----__ -----___

240.49

1.54

249.10

237.16

FEB MAR APR MAY JUN JUL AUG SEP 

242.57 242.32 242.06

243.00 242.76 242.41

242.16 242.01 241.54

240.59 240.52 240.08

241.93 241.69 241.23

243.52 243.38 242.67

242.18 242.03 241.26

240.89 240.22 239.52

241.64 241.48 240.76

240.71 240.94 240.62

240.58 240.86 239.99

244.82 244.64 243.88

245.88 245.86 245.22

244.56 243.88 242.63

246.00 246.27 245.95

242.16 242.07 241.40

242.96 241.70 240.72

240.71 240.72 240.34

240.48 240.45 239.89

241.44 241.31 240.49

240.45 240.15 239.94

240.73 240.31 240.05

242.36 241.96 240.96

241.07 240.67 239.96

244.56 244.94 244.98

249.35 248.97 247.88

244.01 243.14 242.28

241.84 241.04 240.30

------------------------ --------------

242.11 241.91 241.32

1.37 1.42 1.45

249.35 248.97 247.88

240.45 240.12 239.38

241.43

241.75

240.92

239.61

240.68

241.93

240.25

239.08

240.06

239.89

238.87

242.65

243.99

241.50

244.91

240.20

239.84

239.50

238.83

239.10

239.33

239.38

239.66

239.03

244.74

246.72

241.37

239.82

:========

240.60

1.44

246.72

238.63

24

24

24

23

24

24

23

23

23

23

23

24

24

24

24

23

23

23

23

23

23

23

23

23

24

24

24

23

===

24

24

23
1981 67.95

1982 67.85

1983 68.50

1984 67.98

1985 68.41

1986 67.95

1987 68.01

1988 68.04

1989 68.14

JAN

Basis of Comparison,

Pointe Claire,

IJC Phase II Levels Reference Stu

Monthly Mean Levels, IGLD 1955, Without Dev

FEB MAR APR MAY JUN JUL AUG SEP 

69.78 70.57 71.13 69.88 69.69

68.96

69.26

69.39

69.62 70.51

71.39 70.87

70.28

70.01

69.62

69.32

70.28

69.19

70.80

72.51

71.29

69.59

69.88 69.55

70.31

69.32

72.28

71.72

71.29 70.87

69.46

70.64

70.70

70.57

71.92

72.01

70.64

69.29

70.44

70.11

70.41 70.24

71.98 71.49

71.16

69.23

70.70 70.80

70.24

70.80

71.78

70.54

70.57 70.41

69.36

70.31

69.72

70.28

71.13

70.80 70.37

68.37

69.82 69.69

68.11

69.42

69.55 69.59

70.14 69.75 69.39 68.93 

=============,------ Average 67.93 -------we----_--__ 68.66 ----------------====z---------------- ----- ______-------------==-----------------------

69.23 70.75 70.57 ------------

Std.Dev 0.34 0.83 69.89 69.55 69.31

Maximum 68.50 69.78 1.19 1.62 1.70 1.37 1.21

69.25 

1.12

Minimum 67.26 67.09 71.52 73.43 73.72 72.34 71.13

1.06 

67.09 67.13

71.10

67.16 66.77 66.73 66.83

70.80 

66.86 
_ _- -- - ^-

----x--

1950 18.70 18.93 19.19 23.16 22.83 21.19 19.88 19.26 19.49 19

1951 19.00 20.05 21.52 28.05 24.64 22.01 21.98 20.60 20.31 20

1952 19.55 20.70 21.46 25.69 25.00 23.59 21.88 21.33 20.54 20

1953 19.09 20.14 21.75 24.61 22.15 20.73 20.01 19.78 19.36 18

1954 17.59 18.24 20.70 24.80 23.59 22.97 21.16 19.78 20.08 21

1955 19.52 20.18 21.42 26.44 23.16 20.93 19.59 19.23 19.09 19

1956 18.01 18.08 18.80 22.51 23.69 22.57 21.26 20.57 21.00 20

1957 18.34 18.70 19.55 20.08 19.59 18.96 21.85 19.78 19.62 19

1958 19.26 18.77 18.86 21.46 18.96 18.86 18.80 18.37 18.96 20

1959 18.31 18.14 18.54 23.06 21.98 20.24 19.06 18.08 18.27 18

1960 19.23 20.11 19.98 25.43 25.85 21.98 21.92 20.34 19.16 18

1961 17.78 17.81 18.21 20.05 21.06 20.18 20.47 19.95 19.85 18

1962 18.04 17.98 17.88 20.70 20.18 18.44 17.98 17.98 17.68 17

1963 17.45 17.22 17.42 21.10 19.52 18.18 17.42 17.52 17.88 17

1964 18.14 17.95 18.67 19.78 18.70 17.95 17.32 16.96 16.93 16

1965 17.78 17.72 17.78 18.44 19.23 17.39 16.93 17.45 18.27 20

1966 19.00 18.60 20.31 21.33 19.75 19.13 18.01 18.24 18.01 17

1967 18.96 18.83 18.14 22.01 21.49 20.51 19.75 19.09 19.00 20

1968 19.16 20.05 20.90 23.52 20.21 19.49 19.85 19.52 19.69 19

1969 18.54 19.98 19.98 23.82 24.25 22.01 21.33 21.00 19.98 19

1970 18.37 18.93 19.19 22.47 23.49 20.87 20.73 20.31 19.69 19

1971 18.41 19.46 20.28 24.02 25.16 20.96 19.55 19.26 19.55 19

1972 18.24 19.06 19.52 23.16 26.64 23.16 22.97 22.70 21.95 21

1973 19.55 21.16 24.18 25.82 25.26 23.49 22.60 21.88 21.62 21.

1974 19.26 20.47 22.24 25.69 28.58 25.26 22.70 21.56 21.23 21.

1975 19.19 20.28 21.65 24.25 24.54 22.64 21.16 20.83 20.93 21

1976 18.64 20.47 22.60 27.85 25.46 22.51 22.18 21.82 21.52 21

1977 18.37 19.46 22.24 24.70 22.51 20.83 20.31 20.18 20.64 22.

1978 19.49 20.67 20.96 24.80 24.67 22.01 21.23 20.73 20.21 20.

1979 18.60 19.49 22.18 25.26 25.56 22.28 20.73 20.18 20.87 21.

JAN FEB MAR APR MAY JUN JUL AUG SEP O

Montre

Basis of compari son, IJC Phase II Levels

al Ha rbour , Mont hlY Mean Level St IGLD 19

Reference Study

5, Without Devia
Basis of Comparison, IJC Phase II Levels Reference Study

Montreal Harbour, Monthly Mean Levels, IGLD 1955, Without Devia

JAN FEB MAR APR MAY JUN JUL AUG SEP O

1980 19.69 20.24 20.96 24.11 22.93 21.29 20.96 21.13 21.10 21.

1981 18.60 21.69 22.67 24.28 22.21 21.65 20.24 20.47 21.62 21.

1982 18.44 19.65 20.37 24.21 22.93 21.26 20.70 19.75 19.65 19.

1983 19.78 20.87 21.98 23.46 26.64 23.56 20.67 20.11 19.75 19.

1984 18.83 20.87 21.78 25.79 24.11 23.13 22.28 21.59 21.36 20.

1985 19.46 20.54 22.51 24.77 24.61 21.75 21.39 21.39 20.90 20.

1986 18.70 20.18 21.36 24.97 23.59 22.60 21.65 21.85 22.05 22.

1987 18.80 19.98 21.49 24.38 21.52 21.69 21.16 20.83 20.87 21.

1988 18.93 20.34 20.67 24.02 22.77 21.19 20.37 20.51 20.14 20.

1989 19.13 19.36 19.16 21.98 22.01 21.85 20.47 19.85 19.36 19.

=============================================--------------------------~-------------------

Average 18.75 19.53 20.48 23.65 23.03 21.28 20.51 20.04 19.95 20.

Std.Dev 0.60 1.09 1.62 2.15 2.36 1.74 1.50 1.34 1.24 1.

Maximum 19.78 21.69 24.18 28.05 28.58 25.26 22.97 22.70 22.05 22.

Minimum 17.45 17.22 17.42 18.44 18.70 17.39 16.93 16.96 16.93 16.
1950 12.27 12.11 12.30 16.31 15.65 14.14 12.83 12.24 12.37 1

1951 12.30 12.96 14.21 20.67 17.13 14.40 14.30 13.19 12.93 1

1952 12.83 13.45 14.01 18.50 17.62 16.14 14.34 13.85 13.16 1

1953 12.43 13.25 14.96 17.78 15.35 13.52 12.80 12.50 12.17 1

1954 11.02 11.58 13.78 17.95 16.67 15.85 13.85 12.63 13.06 1

1955 12.83 13.12 14.30 19.19 16.11 13.68 12.47 12.14 12.01 1

1956 11.42 11.38 11.91 15.68 16.67 15.16 13.81 13.22 13.58 1

1957 11.75 11.98 12.89 13.68 13.09 12.34 14.73 12.63 12.53 1

1958 12.83 12.27 12.40 15.88 13.19 12.66 12.43 11.94 12.43 1

1959 11.78 11.75 12.07 16.60 15.06 13.32 12.27 11.58 11.71 1

1960 12.60 13.29 13.12 18.73 18.54 14.57 14.34 13.12 12.17 1

1961 11.19 11.15 11.91 14.34 14.83 13.42 13.42 12.93 12.86 1

1962 11.45 11.45 11.48 15.12 14.40 12.07 11.48 11.52 11.09 1

1963 10.89 10.76 11.06 15.58 13.91 11.84 10.93 11.09 11.48 1

1964 11.68 11.55 12.43 14.21 13.02 11.88 11.06 10.56 10.56 1

1965 11.32 11.29 11.48 12.47 13.19 11.22 10.60 11.06 11.81 1

1966 12.47 12.11 13.88 15.16 13.81 12.76 11.48 11.78 11.42 1

1967 12.40 12.24 11.75 15.85 15.22 14.07 13.16 12.30 12.14 1

1968 12.53 13.06 14.01 16.90 13.52 12.66 12.76 12.34 12.40 1

1969 11.91 12.99 12.99 17.19 17.78 14.73 13.85 13.48 12.83 1

1970 11.84 12.24 12.53 16.11 17.16 13.94 13.65 12.99 12.60 1

1971 11.71 12.47 13.25 16.90 18.37 13.81 12.43 12.20 12.50 1

1972 11.65 12.07 12.57 16.14 19.78 16.01 15.58 15.19 14.30 1

1973 12.99 14.21 16.99 18.50 17.95 15.88 15.06 14.37 13.98 1

1974 12.93 13.55 15.03 18.47 21.52 17.78 15.12 13.98 13.55 1

1975 12.66 13.16 14.44 16.83 17.29 15.12 13.42 13.09 13.29 1

1976 12.07 13.52 15.62 20.60 18.27 14.93 14.70 14.57 14.04 1

1977 11.84 12.40 15.09 17.85 15.39 13.48 12.93 12.80 13.16 1

1978 13.06 13.62 13.65 17.68 17.59 14.63 13.65 13.12 12.70 1

1979 12.11 12.60 15.35 18.27 17.95 14.96 13.35 12.80 13.52 1

JAN FEB MAR APR MAY JUN JUL AUG SEP 

Basis of Comparison, IJC Phase II Levels Reference Stud

Lake St. Pierre, Monthly Mean Levels, IGLD 1955, Without Dev
JAN

1980 13.06

1981 11.91

1982 11.88

1983 13.02

1984 12.30

1985 12.70

1986 12.07

1987 12.17

1988 12.30

1989 12.43

Basis of Comparison, IJC Phase II Levels Reference Stud

Lake St. Pierre, Monthly Mean Levels, IGLD 1955, Without Dev<

FEB MAR APR MAY JUN JUL AUG SEP 

13.12 13.68 16.77 15.35 13.68

14.83

13.39

15.55

13.58 13.62

17.39

1

15.65

14.96

12.63

13.16

13.35

13.25 14.04

17.32

1

15.9813.81

13.75

13.16 12.37

14.76

12.34

16.63

1

19.95 16.27

13.88

13.19 12.66

14.57

12.40

18.54

1

16.7715.65

13.32

14.76

15.12

13.88

17.36

13.58

17.03

1

14.17

13.06

13.85 13.85

14.17

13.22

17.85

1

16.21

14.90

12.83

14.01 14.21

14.17

14.47

17.03 13.94

1

14.17 13.52

13.19 13.32

13.09 13.19

17.03

1

15.45

13.55

12.57

12.83

12.63

13.16 12.86

15.58

1

15.68

14.67 13.02 12.50 12.17 1

-----_--_-__-______-____________ Average __------_-__-____---________________ 12.16 12.67 13.57 -------we---- 16.92 -----------------------------------------------_-

__---_

Std.Dev 16.20 14.17 0.58 0.90

1.36 1.70 2.02

13.29 12.84 12.76 1

Maximum 13.06 14.83

16.99 20.67 21.52

1.39 1.15 0.99 0.88 

Minimum 10.89 10.76

11.06 12.47 13.02

17.78 15.58 15.19 14.47 1

11.22 10.60 10.56 10.56 1
APPENDIX C - Lake Ontario and St. Lawrence River Levels and Flows with Past

Discretionary Actions Tables and Graphs
Lake Ontario with Discretionary Actions

Basis of Comparison, 1930-l 960

In

252-/.................. - . . . . . . . . . . ..-_...........................-....._._........_.............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . .._......... _... I

3 246

5 244

%:

-I 242

2

“PLY 9 l&d ’ ’ ’i&d ’ ’ i!& ’ ’ ‘&(j ’ ’ ’195s ’

’ ’ ’1960 ’

Year

-EOC Levels ----- Master Gage

Lake Ontario with Discretionary Actions

Basis of Comparison, 1960-I 990

3

252 . . . . . . . . . . . . - . . . . . . -.-..-, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -..-..-..- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . .

F 250 ..~........~.....................~.~......_...................._.............._...........~~..........__.........._. ._........_..................

9

(3 246 . . . . . . . . . . . . . . . . . . ..-.............~.~.~...........~........ ~~‘.~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..-..................... _ . . . . .._...... -

$ 246

c

5 244

3

. 242

24

Pko”” ’ 196$“’1970““’1975 ““““’ 1960 196fi ’ ’

I

1990’

Year

-EIOC Levels -.-mm Ma!dZZ~

82
Year

Lake Ontario with Discretionary Actions

Basis of Comparison, 19304 960

...-....................

........ .....I.... .I..............................

......... .. .-.. .......... .. ...”.......“...”..

1

BP"" ho 193!i " """"'4C"""" 1940 19 1950 1955 "Ild60

Year

Lake Ontario with Discretionary Actions

Basis of Comparison, 1960-l 990

,

360./m.......-............-.........w. . . . _ . . . . . . . . . . . . . . . . . . . . . . ..-...................-.....-........ _.".. . . . . . . . . . . . . . ..-.......--.--.-... -... I

Year

90

83
Basis of Comparison, IJC Phas

Lake Ont:ario Monthly Mean Level

e1 I LeveIs Refe rence Study

.SI IGLD 1 955, Wi th Deviations

00

P

1900 244.15

1901 243.66

1902 243.66

1903 243.50

1904 242.93

1905 243.16

1906 243.89

1907 244.23

1908 244.16

1909 242.86

1910 243.31

1911 243.24

1912 244.48

1913 244.37

1914 243.51

1915 243.13

1916 243.78

1917 243.40

1918 243.53

1919 243.86

1920 243.24

1921 244.14

1922 243.61

1923 243.01

1924 244.13

1925 242.79

1926 243.22

1927 244.02

1928 245.09

1929 244.02

1930 244.22

1931 243.11

JAN FEB MAR

244.28 244.52

243.49 243.50

243.55 244.17

243.73 244.54

243.18 243.85

242.94 243.13

244.00 243.86

244.35 244.18

244.28 244.63

243.05 243.58

243.45 244.08

243.35 243.58

244.30 244.27

244.76 244.64

243.65 243.64

243.52 243.90

243.98 243.98

243.48 243.94

243.56 244.28

243.82 243.89

243.16 243.42

244.00 244.26

243.66 244.15

242.94 243.27

244.14 244.07

242.77 243.66

242.94 242.88

243.81 244.01

245.19 245.04

244.29 244.47

244.92 245.53

243.00 243.16

245.26 245.65 245.66

244.90 245.56 245.74

244.80 245.00 245.42

245.56 245.52 245.35

245.36 246.12 246.46

244.36 245.07 245.61

244.30 244.79 245.30

244.66 245.09 245.46

245.46 246.12 246.27

244.39 245.62 245.86

244.65 245.31 245.50

244.36 245.24 245.73

245.30 246.22 246.80

245.78 246.09 246.11

244.76 245.44 245.57

244.10 244.60 244.93

244.94 245.75 246.56

245.12 245.38 245.79

244.98 245.11 245.20

244.50 245.48 246.11

244.31 244.92 245.31

244.81 245.16 245.24

245.13 245.75 245.88

244.22 245.00 245.70

244.75 245.61 245.87

244.32 244.53 244.64

243.82 244.88 245.19

244.39 244.61 245.19

245.52 245.78 245.84

245.62 246.54 246.66

245.94 246.06 246.02

243.94 244.79 245.49

245.60 245.44 244.92 Ht.;;

245.52 245.10 244.64 .

246.21 246.09 245.26 244.51

245.54 245.41 244.92 244.32

246.36 245.86 245.15 244.46

245.83 245.60 244.98 244.24

245.63 245.34 244.69 244.29

245.57 245.39 244.82 244.43

246.02 245.50 244.56 243.93

245.62 245.23 244.58 243.93

245.38 245.18 244.80 244.29

245.92 245.66 245.36 245.09

246.43 245.74 245.18 244.71

245.75 245.27 244.66 244.12

245.38 245.06 244.80 244.21

245.08 245.46 245.20 244.62

246.62 245.71 244.72 244.00

246.18 245.78 245.02 244.39

245.27 245.00 244.70 244.33

245.79 245.15 244.54 244.02

245.74 245.70 245.21 244.62

245.17 244.84 244.46 244.14

245.95 245.35 244.70 244.09

245.64 245.28 244.89 244.46

245.71 245.40 244.80 '2;;.;;

244.58 244.40 244.09 .

245.24 245.14 245.06 244.88

245.48 245.40 244.88 244.48

246.01 245.78 245.02 244.37

246.44 245.85 245.08 244.44

245.91 245.24 244.58 243.94

245.60 245.39 245.06 244.66

APR MAY JUN JUL AUG SEE' OCT

243.92

243.54

243.94

243.73

243.73

243.68

244.11

244.09

243.44

243.57

243.74

244.71

244.26

243.83

243.63

243.86

243.62

244.13

244.05

243.72

244.08

243.92

243.56

244.16

243.67

243.64

244.67

244.18

244.05

243.97

243.45

244.33

243.99 244

243.54 244

243.58 244

243.30 244

243.22 244

243.58 244

243.79 244

243.77 244

243.05 244

243.41 244

243.45 244

244.51 244

243.92 245

243.59 244

243.24 244

243.49 244

243.42 244

243.75 244

243.71 244

243.45 244

244.01 244

243.74 244

243.10 244

244.14 244

243.17 244

243.65 243

244.39 244

244.62 244

243.91 245

243.66 245

243.27 244

244.14 244

NOV DEC 
00VI

JAN FEB MAR APR MAY JUN JUL AUG SEE' 

La

Basis of Compar,ison, IJC Phase II Levels

ke Ont ario Mont hly Mean Levels IGLD 195 5

Refe rence S tud

, With Devi atio

1932 244.46 244.91 244.91 245.45 245.76 245.73 245.79 245.75 245.34 244

1933 244.51 244.43 244.52 245.51 246.10 246.11 245.96 245.64 245.27 244

1934 243.86 243.67 243.61 244.35 245.05 245.25 245.28 244.88 244.52 244

1935 243.19 242.96 242.97 243.34 243.87 244.40 244.80 244.59 244.12 243

1936 242.73 242.28 242.71 244.42 245.07 245.08 244.85 244.40 244.05 243

1937 243.39 243.90 244.02 244.44 245.43 245.91 245.91 245.53 244.91 244

1938 243.72 244.06 244.46 245.02 245.21 245.36 245.44 245.54 245.27 244

1939 243.39 243.33 243.81 244.84 245.47 245.42 245.35 245.25 244.90 244

1940 243.25 242.91 242.87 243.88 245.08 245.52 245.52 245.09 244.53 244

1941 244.10 244.05 243.93 244.56 245.15 245.34 245.35 245.15 244.78 244

1942 243.79 243.71 244.20 245.30 245.67 245.91 245.68 245.40 244.86 24

1943 244.09 244.25 244.48 245.09 246.07 246.97 246.74 246.18 245.32 244

1944 243.33 243.30 243.49 244.33 245.28 245.61 245.58 245.08 244.55 243

1945 243.30 243.28 244.01 245.08 245.67 246.04 245.94 245.41 244.79 24

1946 244.11 244.14 244.35 244.32 244.37 244.92 245.11 244.90 244.45 24

1947 243.68 244.03 243.97 244.99 245.89 246.93 246.91 246.48 245.64 24

1948 243.52 243.46 243.98 245.08 245.54 245.68 245.44 245.01 244.44 243

1949 243.63 243.96 244.27 244.74 245.02 245.13 245.16 244.82 244.45 24

1950 243.91 244.39 244.53 245.65 245.83 245.71 245.52 245.22 244.82 24

1951 244.19 244.46 244.99 246.00 246.49 246.28 246.06 245.42 244.81 244

1952 244.21 244.92 245.24 246.04 246.39 246.50 246.06 245.46 244.84 244

1953 243.78 2‘43.96 244.14 244.81 245.39 245.77 245.51 245.17 244.66 244

1954 243.51 243.77 244.59 245.33 246.15 246.02 245.58 245.02 244.66 244

1955 244.40 244.39 244.84 245.71 245.89 245.66 245.32 245.02 244.50 244

1956 243.39 243.38 243.79 244.58 245.62 245.89 245.53 245.04 244.70 24

1957 243.41 243.61 243.92 244.38 244.95 245.50 245.85 245.37 244.79 244

1958 243.72 243.72 244.03 244.83 245.53 245.90 245.96 245.85 245.69 245

1959 243.80 243.93 244.32 245.37 245.80 245.71 245.50 245.10 244.64 244

1960 244.39 244.54 244.52 245.35 246.20 246.34 245.88 245.29 244.60 243

1961 242.68 242.34 243.01 243.92 245.07 245.59 245.60 245.21 244.75 244
Basis of Compa risen, IJC Phase II Levels

Lake Ontario Monthly Mean Levels, IGLD 195 5

Reference

, With De

Study

,iations

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

242.88

243.35

242.52

241.66

243.97

244.17

244.31

244.16

243.65

244.11

243.94

245.41

244.17

243.07

244.06

243.74

245.60

244.00

243.87

243.80

243.97

244.24

244.63

244.50

245.28

246.10

243.94

243.58

E%

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

=========

Average

Std.Dev

Maximum

Minimum

==z======

243.79

0.67

246.10

241.66

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT 

242.77 243.00 244.02

242.91 242.85 243.97

242.24 242.26 243.11

241.76 242.26 242.97

243.91 244.32 244.63

244.24 244.20 245.00

244.21 244.23 244.90

244.34 244.16 244.85

243.78 243.94 244.71

244.06 244.50 245.16

244.20 244.54 245.29

245.91 246.22 247.16

244.72 245.02 245.58

243.44 243.90 244.47

244.36 245.56 246.57

243.62 244.30 245.15

245.77 245.35 246.13

244.21 244.70 245.71

243.81 243.86 245.12

243.83 244.60 244.67

243.99 244.18 245.22

244.61 244.70 245.11

244.79 245.30 246.11

244.63 245.45 246.22

245.70 246.04 246.88

246.23 246.13 246.84

244.09 244.13 244.75

243.60. 243.63 244.68

.--------------- .---------------======zz

243.88 244.15 244.96

0.78 0.77 0.76

246.23 246.22 247.16

241.76 242.26 242.97

244.79

244.94

243.97

243.89

244.89

245.72

245.05

245.58

245.33

245.74

246.21

247.32

246.20

244.80

247.12

245.30

246.56

246.13

245.63

245.03

245.58

246.02

246.86

246.40

246.94

246.65

245.21

245.62

--a----__ ------___

245.53

0.67

247.32

243.87

245.06

245.33

244.38

244.31

245.30

246.16

245.55

246.01

245.52

245.64

246.41

247.19

246.47

244.85

247.18

245.06

246.25

246.04

245.69

245.39

245.75

246.19

247.04

246.34

247.12

246.33

245.36

246.33

.-----___ -----___

245.77

0.61

247.19

244.31

244.96 244.88

245.20 244.97

244.38 244.06

244.48 244.27

245.26 244.99

246.34 246.10

245.78 245.49

245.85 245.39

245.65 245.37

245.44 245.08

246.63 246.28

246.58 245.72

246.18 245.44

244.59 244.33

246.85 246.26

245.12 245.06

245.64 245.14

245.66 245.32

245.69 245.57

245.56 245.51

245.56 245.01

245.70 245.34

246.80 246.24

246.09 245.51

247.11 246.88

246.04 245.35

245.20 244.97

246.30 245.71

.----- .-----===========

245.70 245.35

0.54 0.47

247.11 246.88

244.38 244.06

244.47

244.44

243.60

244.10

244.67

245.55

245.08

244.62

244.82

244.86

245.54

244.88

244.52

244.17

245.51

244.90

244.62

245.09

245.03

245.27

244.57

244.85

245.53

245.06

246.50

244.78

244.51

245.12

========

244.84

0.41

246.50

243.60

244.2

243.7

242.8

243.8

244.2

245.1

244.4

243.9

244.4

244.3

244.7

244.1

243.6

244.1

244.9

244.9

244.1

244.7

244.3

244.8

244.1

244.3

244.8

244.5

246.7

244.3

244.1

244.5

'======

244.3

0.4

246.7

242.8
1900

1901

1902

1903

1904

1905

1906

1907

1908

1909

1910

1911

?i 1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

JAN FEB MAR APR MAY JUN JUL AUG SEP 

210.00 213.50 232.50 245.00 254.50 246.00 243.80 243.50 250.50 241

213.50 213.50 204.00 238.20 259.20 265.20 266.00 253.20 252.00 237

211.20 207.00 220.80 237.80 224.80 214.50 246.00 287.80 282.80 26

210.00 222.50 247.00 269.20 275.20 255.80 254.50 264.80 271.80 261

210.00 207.00 221.00 262.50 281.20 288.80 293.80 305.00 295.50 27

210.00 207.00 204.00 214.50 235.50 255.80 278.20 288.50 288.20 27

220.00 242.20 236.50 228.50 222.50 225.80 250.00 261.20 255.80 24

220.00 253.00 252.50 255.00 247.80 249.50 258.20 270.50 268.80 26

220.00 252.00 262.50 280.00 294.50 299.50 300.00 298.20 271.20 25

210.00 207.00 216.00 225.00 266.00 276.00 278.20 276.20 259.50 24

210.00 207.00 222.80 234.20 249.50 250.80 245.50 250.00 254.80 24

210.00 207.00 204.80 191.20 200.20 212.50 219.50 223.00 223.00 22

220.00 225.00 223.00 239.50 262.50 275.00 288.20 283.00 272.50 26

220.00 255.80 262.20 282.20 290.80 295.80 285.00 272.80 266.00 25

211.00 226.50 218.20 242.20 261.00 264.20 260.80 251.20 260.00 25

210.00 212.50 227.50 209.00 195.80 213.80 220.20 236.00 268.20 26

216.80 238.00 237.00 253.20 272.00 288.00 302.50 305.00 276.20 24

210.00 210.80 222.80 257.50 265.00 271.50 290.80 305.50 297.50 28

218.20 227.20 254.20 275.20 269.20 256.50 255.50 257.80 261.80 26

220.00 244.20 246.20 252.50 270.50 293.00 297.00 288.80 269.50 25

210.00 207.00 207.20 214.50 215.20 217.20 226.20 260.00 269.80 26

220.00 244.50 251.50 259.20 257.00 247.50 240.50 236.50 229.80 22

210.00 207.00 226.50 247.00 265.20 271.00 285.80 275.00 265.00 24

210.00 207.00 204.00 196.50 203.80 235.80 244.80 235.80 231.20 22

218.50 227.20 220.80 221.50 244.20 257.50 259.50 262.20 253.00 25

210.00 20'7.00 210.50 227.80 221.20 213.50 217.80 220.00 221.20 21

210.00 207.00 204.00 188.20 204.20 210.50 217.20 220.20 225.00 25

220.00 235.20 239.80 241.20 221.00 215.50 218.00 242.20 238.50 23

220.00 253.50 257.20 260.80 264.00 252.80 266.00 277.80 276.20 25

220.00 251.80 257.80 278.20 298.80 303.20 302.50 307.00 289.20 274

220.00 258.20 279.00 293.00 296.80 289.00 288.50 276.00 265.20 24

210.00 207.00 204.00 188.00 196.80 218.50 221.80 222.50 223.00 221

Basis of Comparison, IJC Phase II Levels Reference Study

Lake Ontario Monthly Mean outflows , TCFS, With Devi.ations
_ . . - -- _ - - _.- _ -- - - -_ i - .- _ -. .- . _ .,.

1932 212.50

1933 211.50

238.80 241.50 250.00 255.80 237.00 222.50 226.50

1934

208.00 204.00 213.80 243.00 235.50 220.80 221.20

210.00

1935

207.00 204.00 188.00 188.50 196.00 202.50 203.50

210.00

1936

207.00 204.00 188.00 188.00 193.00 205.00 210.00

210.00

1937 210.00

207.00 204.00 199.20 215.20 216.20 213.20 212.20

1938

212.80 224.20 197.50 222.20 227.50 249.80 251.50

210.00

1939

214.20 233.20 244.50 242.50 219.20 221.20 224.00

210.00

1940

207.00 204.20 225.00 248.20 243.20 231.20 220.50

210.00

1941 220.00

207.00 204.00 188.00 217.80 243.50 250.80 250.20

1942

226.00 215.00 190.00 193.20 207.00 211.80 216.50

210.00

1943

207.00 209.00 239.20 248.00 259.80 251.80 254.80

220.00

1944

245.20 254.20 261.20 279.00 300.80 305.20 310.00

210.00

1945 210.00

214.80 216.50 224.50 248.00 259.50 270.20 262.00

1946

207.00 215.20 254.20 269.00 283.50 290.50 289.00

220.00

1947

250.20 256.80 259.80 232.50 232.00 241.00 245.80

214.80

1948

242.20 238.00 256.80 279.00 300.20 304.50 310.00

211.20

1949

220.20 231.50 264.20 278.50 283.20 273.20 263.80

212.50

1950

228.00 239.00 243.50 238.20 220.00 220.00 222.50

211.00 233.50 238.80 267.20 278.80 266.80 257.20 252.50

1951 220.00 254.20 269.80 284.80 298.50 307.20 300.00 284.50

1952 220.00

1953

258.80 276.80 292.80 301.50 307.50 302.20 288.20

220.00 242.00 244.20 258.80 261.80 278.00 270.80 271.20

1954 210.00 219.50 250.80 263.50 287.50 291.50 278.20 258.80

1955 220.00 253.50 267.00 285.00 294.00 281.20 262.00 260.20

1956 210.00

1957

217.00 235.50 250.50 276.50 288.50 285.80 273.00

210.00 219.00 226.50 225.50 219.20 223.50 252.50 258.80

1958 210.00 207.00 204.00 194.00 200.80 215.50 219.20 220.20

1959 210.00 207.00 218.50 245.00 259.20 256.50 243.00 221.20

1960 220.00 238.80 241.50 249.80 270.80 286.50 280.20 263.20

1961 210.00 207.00 204.00 195.50 222.00 256.80 255.00 250.50

JAN FEB MAR APR MAY JUN JUL AUG SEP O

Basis of Comparison, IJC Phase II Levels Reference

Lake Onta rio Monthly

Study

Mean Outflows , TCFS, With Devi.ations

223.00 217

221.50 214

202.80 197

208.50 199

212.80 206

236.00 221

235.00 254

221.80 221

229.20 226

216.80 209

251.50 245

300.80 272

252.80 239

274.20 291

245.20 242

307.80 279

254.00 239

222.80 221

256.50 248

276.00 260

280.00 266

263.50 249

257.80 260

256.50 255

270.20 256

250.50 232

225.80 247

220.80 219

247.80 233

251.00 236
Basis of Comparison, IJC Phase II Levels Reference Study

Lake Ontario Monthly Mean Outflows, TCFS, With Deviations

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

cz

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

--------- ---------

Average

Std.Dev

Maximum

Minimum

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

210.00

208.50

210.00

184.80

210.80

210.00

243.50

231.80

220.00

234.50

221.00

250.20

238.80

254.80

244.80

220.00

249.20

220.20

253.20

235.00

237.50

230.00

238.20

230.20

246.50

298.20

235.50

208.80

-------- _-------

219.21

14.83

298.20

184.80

207.00

207.20

206.80

182.00

210.00

213.80

247.20

250.50

229.00

243.20

227.00

284.50

268.50

249.50

258.20

212.80

290.50

245.80

251.50

239.20

247.50

240.00

270.00

259.80

287.50

283.50

249.20

217.80

229.75

23.07

290.50

182.00

204.00 189.80 203.00 213.20 216.20 220.20 221.20 218.

197.80 187.20 192.50 207.80 215.20 220.20 218.80 214.

193.20 177.00 183.80 196.50 201.80 207.20 208.00 205.

179.00 181.80 176.20 189.50 201.00 204.80 201.50 203.

229.00 226.00 203.80 209.80 215.50 217.20 219.20 212.

204.00 206.50 213.50 218.00 233.50 245.50 243.80 257.

232.80 254.20 234.50 232.00 248.20 258.50 266.50 257.

247.50 258.80 270.20 286.50 294.50 291.50 273.50 251.

231.80 239.00 252.80 251.50 260.20 266.20 261.20 263.

258.80 270.00 285.80 276.00 263.20 258.20 265.80 263.

250.00 269.00 288.80 301.80 311.00 310.00 307.50 300.

298.20 324.20 336.80 349.80 350.00 323.50 317.00 306.

300.20 308.50 308.20 327.50 336.00 330.50 314.20 303.

286.80 301.80 304.80 309.00 275.50 268.20 272.50 282.

289.00 306.00 328.20 348.20 349.80 326.00 309.20 301.

247.20 277.50 284.20 266.50 253.00 261.50 276.00 299.

298.80 292.80 314.50 308.50 291.50 278.20 272.80 262.

268.50 282.20 291.00 297.00 280.50 275.80 284.50 290.

245.20 272.80 292.00 281.20 280.00 285.20 293.20 280.

261.00 258.00 249.00 252.80 262.00 278.00 296.50 297.

249.80 279.00 292.50 295.20 291.50 275.20 271.00 266.

265.80 273.50 282.20 298.80 289.00 281.50 277.00 271.

279.80 284.80 309.80 310.50 309.50 310.00 308.00 284.

278.20 300.00 301.20 307.00 305.80 299.20 298.50 293.

298.50 316.80 331.50 325.20 334.20 327.20 325.00 324.

314.50 313.50 329.20 313.50 305.50 298.00 286.50 282.

258.00 252.00 240.00 250.50 244.50 246.00 242.50 236.

214.00 204.80 230.50 264.50 280.50 274.50 266.20 257.

_-_---__-_---_______----~-~-~-~~~--~-----------~~~~~~~-~-- ________________________________________------------------------

---

237.05 245.73 255.26 260.39 262.36 262.13 258.92 252.

29.03 36.21 38.58 37.81 35.32 31.94 29.16 27.

314.50 324.20 336.80 349.80 350.00 330.50 325.00 324.

179.00 177.00 176.20 189.50 201.00 203.50 201.50 197.
241: ,

1900 ' ' 'ldo!i 1910 ' ' ' ' ' ' ' '191fs ' ' ' '1920 ' '

' ' '192s ' ' ' '1930 '

Year

Ogdensburg, with Discretionary Actions

Basis of Comparison, 1930-l 960

247r---I

""'1940 "I' 1946

Year

Ogdensburg, with Discretionary Actions

Basis of Comparison, 1960-l 990

2474

.....................”................. ....- . ........”..... ... .. ..... ..... ..... .... ...... ......... ......... .

Year

90
Basis of Comparison, IJC Phase II Levels Reference Study

Ogdensburg I Monthly Mean Levels, IGLD 1955, With Deviations

1900 243.63 243.74 243.88 244.57 244.92 245.00 244.96 244.78

1901 243.08 242.90 242.97 244.23 244.80 244.94 244.70 244.34

1902 243.09 243.01 243.58 244.14 244.44 244.94 245.59 245.15

1903 242.93 243.09 243.78 244.72 244.62 244.59 244.82 244.58

1904 242.32 242.62 243.22 244.56 245.24 245.54 245.40 244.74

1905 242.56 242.35 242.58 243.82 244.44 244.88 244.94 244.60

1906 243.28 243.22 243.12 243.66 244.23 244.76 244.94 244.54

1907 243.64 243.52 243.34 243.84 244.36 244.77 244.82 244.51

1908 243.58 243.44 243.74 244.52 245.13 245.25 244.96 244.40

1909 242.24 242.47 242.97 243.78 244.81 244.99 244.72 244.29

1910 242.73 242.89 243.46 244.00 244.60 244.79 244.70 244.45

1911 242.65 242.79 243.06 243.96 244.84 245.29 245.44 245.15

\o 1912 243.91 243.68 243.66 244.65 245.49 246.03 245.52 244.80 c1 1913 243.79 243.94 243.75 244.86 245.12 245.10 244.79 244.37

1914 242.94 242.96 243.02 244.05 244.64 244.77 244.58 244.30

1915 242.53 242.94 243.23 243.58 244.18 244.44 244.55 244.85

1916 243.19 243.24 243.24 244.18 244.90 245.67 245.62 244.57

1917 242.82 242.91 243.31 244.33 244.55 244.95 245.22 244.64

1918 242.91 242.86 243.42 244.02 244.22 244.42 244.50 244.19

1919 243.25 243.01 243.07 243.69 244.62 245.13 244.74 244.09

1920 242.65 242.58 242.87 243.76 244.42 244.81 245.22 244.94

1921 243.55 243.20 243.43 243.97 244.38 244.54 244.51 244.18

1922 243.05 243.12 243.51 244.42 244.96 245.06 245.01 244.44

1923 242.40 242.34 242.73 243.78 244.57 245.12 244.99 244.67

1924 243.55 243.49 243.47 244.19 244.96 245.15 244.96 244.60

1925 242.17 242.16 243.10 243.68 243.96 244.12 244.04 243.82

1926 242.63 242.35 242.31 243.42 244.44 244.73 244.74 244.62

1927 243.42 243.06 243.26 243.66 244.04 244.70 244.99 244.75

1928 244.56 244.44 244.24 244.74 245.00 245.15 245.23 244.88

1929 243.42 243.46 243.61 244.71 245.56 245.66 245.42 244.71

1930 243.63 244.09 244.60 244.94 245.04 245.07 244.95 244.30

1931 242.51 242.42 242.61 243.54 244.39 245.00 245.10 244.87

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT 

244.16 243.62 

243.85 243.29 

244.27 243.56 

243.99 243.41 

244.02 243.41 

243.90 243.23 

243.87 243.50 

243.90 243.46 

243.59 243.04 

243.72 243.14 

244.00 243.49 

244.84 244.54 

244.27 243.76 

243.74 243.26 

243.95 243.36 

244.33 243.73 

243.72 243.17 

243.85 243.30 

243.82 243.41 

243.58 243.13 

244.32 243.71 

243.82 243.52 

243.80 243.28 

244.28 243.87 

244.01 243.56 

243.48 243.11 

244.50 244.08 

244.22 243.78 

244.05 243.48 

244.00 243.42 

243.67 243.09 

244.52 244.10 
Basis of Comparison, IJC Phase II Levels Reference Study

Ogdensburg, Monthly Mean Levels, IGLD 1955, With Deviations

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

1932 243.94 244.24 244.22 244.74 245.04 245.14 245.29 245.23 244.81 244.4

1933 244.00 243.94 244.06 245.04 245.50 245.55 245.48 245.14 244.75 244.1

1934 243.32 243.13 243.09 243.96 244.70 244.87 244.88 244.45 244.06 243.7

1935 242.60 242.38 242.41 242.91 243.47 244.00 244.35 244.10 243.61 243.1

1936 242.10 241.64 242.12 243.99 244.58 244.58 244.35 243.88 243.50 243.2

1937 242.81243.34 243.39 244.02 244.92 245.39 245.25 244.82 244.26 243.8

1938 243.18 243.51 243.80 244.32 244.54 244.86 244.93 245.02 244.66 244.0

1939 242.81242.77 243.31 244.26 244.78 244.77 244.76 244.74 244.35 243.9

1940 242.67242.32 242.30 243.48 244.57 244.86 244.82 244.36 243.90 243.5

1941 243.50

243.40 243.36 244.18 244.78 244.91 244.89 244.64 244.25 243.9

1942 243.25 243.18 243.70 244.66 245.00 245.18 244.98 244.65 244.09 243.5

1943 243.50 243.47 243.65 244.26 245.20 246.02 245.73 245.06 244.18 243.4

1944 242.75 242.69 242.88 243.72 244.58 244.85 244.74 244.24 243.74 243.2

1945 242.72 242.72 243.44 244.31 244.85 245.14 244.95 244.38 243.82 243.6

1946 243.51 243.31 243.49 243.42 243.70 244.30 244.44 244.18 243.69 243.3

1947 243.10 243.26 243.22 244.18 245.00 245.98 245.93 245.40 244.47 243.5

1948 242.94 242.82 243.29 244.23 244.62 244.74 244.56 244.15 243.61 243.1

1949 243.06 243.30 243.54 244.02 244.36 244.61 244.64 244.26 243.87 243.5

1950 243.36 243.72 243.83 244.82 244.93 244.90 244.77 244.48 244.00 243.5

1951 243.60 243.62 244.08 245.08 245.51 245.19 245.00 244.43 243.82 243.2

1952 243.62 244.09 244.30 245.06 245.38 245.44 244.98 244.44 243.82 243.2

1953 243.16 243.18 243.36 243.97 244.60 244.87 244.65 244.26 243.77 243.2

1954 242.94 243.15 243.80 244.51 245.22 245.04 244.66 244.21 243.82 243.5

1955 243.82 243.55 243.93 244.76 244.87 244.72 244.51 244.19 243.65 243.4

1956 242.82 242.75 243.04 243.79 244.72 244.92 244.54 244.11 243.75 243.1

1957 242.84 242.98 243.25 243.76 244.42 244.98 245.15 244.59 244.02 243.4

1958 243.18 243.19 243.54 244.44 245.14 245.46 245.49 245.37 245.17 244.5

1959 243.25 243.42 243.75 244.70 245.06 244.98 244.85 244.57 244.08 243.7

1960 243.82 243.84 .243.80 244.64 245.41 245.44 244.98 244.47 243.84 243.2

1961 242.05 241.70 242.44 243.47 244.53 244.84 244.86 244.48 243.97 243.3
Basis of Comparison, IJC Phase II Levels Reference Study

Ogdensburg, Monthly Mean Levels, IGLD 1955 , With Deviations

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973 z? 1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

242.27

242.79

241.88

241.14

243.43

243.65

243.54

243.48

243.02

243.40

243.33

244.70

243.44

242.07

243.27

243.12

244.91

243.40

242.96

243.06

243.22

243.58

243.94

243.86

244.59

245.02

243.22

243.03

--------- ---------

243.18

0.65

245.02

241.14

--------- ---------

Average

Std.Dev

Maximum

Minimum

FEB MAR APR MAY JUN JUL AUG SEP OC

242.17

242.32

241.59

241.27

243.37

243.69

243.41

243.52

243.08

243.28

243.56

244.97

243.79

242.53

243.49

243.05

244.77

243.42

242.92

243.06

243.17

243.90

243.85

243.77

244.71

245.33

243.26

242.98

-------- --------

243.19

0.70

245.33

241.27

242.43 243.62

242.32 243.58

241.72 242.73

241.82 242.55

243.68 244.03

243.72 244.56

243.55 244.11

243.36 244.02

243.24 244.02

243.63 244.26

243.74 244.42

245.20 246.04

243.83 244.38

242.69 243.19

244.54 245.53

243.50 244.19

244.21 245.15

243.77 244.78

243.04 244.20

243.72 243.82

243.36 244.26

243.80 244.18

244.33 245.20

244.52 245.19

245.00 245.78

244.96 245.76

243.23 243.96

243.04 244.22

================

243.43 244.23

0.65 0.62

245.20 246.04

241.72 242.55

244.35 244.58 244.45 244.34

244.57 244.90 244.71 244.44

243.59 243.95 243.92 243.54

243.56 243.92 244.03 243.80

244.45 244.84 244.78 244.48

245.27 245.71 245.81 245.48

244.42 244.97 245.12 244.72

244.73 245.07 244.82 244.33

244.60 244.81 244.89 244.53

244.78 244.74 244.63 244.27

245.28 245.40 245.56 245.17

246.11 245.84 245.13 244.41

245.09 245.23 244.81 244.01

243.54 243.54 243.58 243.36

245.95 245.84 245.46 245.00

244.30 244.19 244.36 244.23

245.45 245.14 244.62 244.17

245.16 245.01 244.74 244.39

244.61 244.75 244.77 244.59

244.29 244.66 244.77 244.58

244.54 244.70 244.52 244.05

245.11 245.17 244.71 244.37

245.82 246.01 245.75 245.13

245.38 245.26 244.99 244.40

245.72 245.98 245.89 245.68

245.41 245.20 244.94 244.23

244.56 244.64 244.51 244.25

245.07 245.59 245.44 244.84

:================================

244.77 244.99 244.91 244.52

0.52 0.48 0.43 0.41

246.11 246.03 245.93 245.68

243.47 243.54 243.58 243.36

243.89

243.88

243.05

243.63

244.12

244.90

244.21

243.64

243.96

243.96

244.35

243.51

243.12

243.14

244.30

243.92

243.64

244.06

243.92

244.15

243.60

243.86

244.34

243.89

245.28

243.70

243.78

244.26

.--------

243.99

0.40

245.28

243.05

243.7

243.2

242.2

243.3

243.6

244.3

243.5

243.1

243.5

243.4

243.5

242.8

242.2

243.0

243.7

243.7

243.1

243.5

243.2

243.6

243.2

243.3

243.7

243.3

245.5

243.2

243.4

243.7

-------

-s----w

243.5

0.4

245.5

242.2
Year

Cardinal, with Discretionary Actions

Basis of Comparison, 1930-l 960

Cardinal, with Discretionary Actions

Basis of Comparison, 1960-l 990

Year

Year

94
Basis of Comparison, IJC Phase II Levels Refer'ence Study

Cardinal, Monthly Mean Levels, IGLD 1955, With Devi ations

JAN FEB MAR APR MAY JUN JUL AUG SEP O

1900 242.49 242.58 242.52 243.20 243.51 243.70 243.66 243.47 242.64 242.

1901 241.81 241.60 241.80 242.88 243.30 243.41 243.10 242.82 242.24 241.

1902 241.85 241.80 242.30 242.77 243.27 243.96 244.38 243.38 242.34 241.

1903 241.68 241.70 242.22 243.08 242.89 243.09 243.38 242.98 242.14 241.

1904 240.94 241.34 241.88 242.97 243.57 243.86 243.61 242.63 241.84 241.

1905 241.24 241.03 241.33 242.66 243.15 243.44 243.24 242.68 241.78 241.

1906 241.96 241.60 241.55 242.30 243.06 243.63 243.59 242.96 242.21 241.

1907 242.39 241.80 241.60 242.19 242.92 243.38 243.34 242.81 242.08 241.

1908 242.32 241.74 241.96 242.69 243.27 243.36 242.98 242.28 241.64 241.

1909 240.85 241.17 241.64 242.50 243.24 243.33 242.96 242.46 241.97 241.

1910 241.44 241.67 242.14 242.64 243.18 243.40 243.35 243.00 242.39 241.

1911 241.34 241.55 241.89 243.07 243.97 244.37 244.48 244.12 243.76 243.

s

1912 242.72 242.39 242.38 243.36 244.10 244.60 243.82 243.00 242.48 241.

1913 242.57 242.30 241.98 243.09 243.31 243.22 242.97 242.61 241.91 241.

1914 241.67 241.50 241.68 242.61 243.10 243.20 243.03 242.80 242.26 241.

1915 241.20 241.65 241.81 242.44 243.28 243.39 243.45 243.63 242.61 241.

1916 241.90 241.68 241.70 242.62 243.27 244.02 243.76 242.41 241.73 241.

1917 241.55 241.64 241.96 242.76 242.93 243.34 243.42 242.48 241.58 241.

1918 241.54 241.37 241.68 242.13 242.46 242.88 243.00 242.58 242.07 241.

1919 241.93 241.31 241.36 242.04 242.95 243.28 242.73 242.02 241.66 241.

1920 241.34 241.30 241.64 242.60 243.35 243.78 244.16 243.46 242.58 241.

1921 242.28 241.55 241.72 242.29 242.82 243.13 243.18 242.84 242.49 242.

1922 241.82 241.94 242.16 243.00 243.43 243.48 243.23 242.66 242.00 241.

1923 241.04 241.02 241.51 242.81 243.64 243.94 243.70 243.42 243.01 242.

1924 242.30 242.13 242.18 243.02 243.67 243.75 243.49 243.03 242.42 241.

1925 240.77 240.80 241.87 242.35 242.74 243.04 242.89 242.61 242.19 241.

1926 241.32 241.03 241.01 242.49 243.49 243.76 243.70 243.53 243.35 242.

1927 242.14 241.50 241.68 242.15 242.85 243.67 243.98 243.44 242.85 242.

1928 243.47 242.94 242.66 243.21 243.50 243.80 243.75 243.18 242.16 241.

1929 242.14 241.76 241.86 242.95 243.75 243.82 243.52 242.56 241.90 241.

1930 242.38 242.45 242.80 243.04 243.12 243.26 243.12 242.48 241.83 241.

1931 241.18 241.10 241.38 242.62 243.50 243.98 244.07 243.80 243.38 242.
1932 242.82 242.88 242.82 243.34 243.64 243.95

1933 242.92 242.88 243.06 244.07

244.28 244.16 243.72 243

244.31 244.45

1934 242.13 241.95 241.94 243.11

244.51 244.12 243.66 243

243.92 244.05

1935 241.28 241.06 241.13 241.91 242.54 243.09

244.00 243.50 243.08 242

1936 240.68 240.16 240.79 243.02

243.38 243.04 242.49 242

243.53 243.52

1937 241.54 242.13 242.04 243.07

243.30 242.75 242.32 242

243.84 244.34

1938 241.96 242.30 242.42 242.91

243.96 243.42 242.94 242

243.20 243.82

1939 241.54 241.52 242.19 243.06

243.88 243.95 243.41 242

243.41 243.45

1940 241.37 241.00 241.00 242.56

243.58 243.66 243.20 242

243.49 243.57

1941 242.23 242.04 242.12 243.32

243.42 242.88 242.60 242

243.97 243.99

1942 242.05 242.01 242.58 243.37

243.92 243.60 243.14 242

243.67 243.75

1943 242.22 241.86 241.96 242.62

243.61 243.18 242.54 241

243.55 244.30

1944 241.46 241.33 241.53 242.43

243.88 242.96 241.95 241

243.17 243.36

1945 241.42 241.46 242.21 242.77

243.09 242.59 242.10 241

243.24 243.42

1946 242.24 241.60 241.72 241.60

243.10 242.39 241.89 241

242.30 243.03

1947 241.81 241.64 241.66 242.59

243.09 242.72 242.13 241

243.31 244.26

1948 241.68 241.40 241.83 242.55

244.13 243.40 242.22 241

242.83 242.92

1949 241.79 241.88 242.04 242.55

242.83 242.45 241.92 241

243.03 243.52

s? 1950 242.17 242.32

243.56 243.09 242.63 242

242.39 243.23 243.23 243.34

1951 242.35 241.92

243.29 243.00 242.36 241

242.28 243.32 243.69 243.17

1952 242.37 242.44 242.46 243.20

243.04 242.52 241.88 241

243.48 243.48

1953 241.82 241.56 241.74 242.30

242.98 242.48 241.80 241

243.02 243.16

1954 241.69 241.82 242.20 242.90

242.98 242.49 241.99 241

243.46 243.19

1955 242.61 241.84 242.14 242.92

242.90 242.59 242.12 241

242.95 242.93

1956 241.54 241.37

242.92 242.55 241.93 241

241.48 242.19 242.99 243.08

1957 241.56 241.62 241.86 242.48

242.64 242.27 241.86 241

243.30 243.92

1958 241.96 242.02

243.80 243.06 242.47 241

242.45 243.58 244.31 244.54

1959 242.05 242.28

244.53 244.40 244.10 243

242.54 243.36 243.62 243.56

1960 242.60 242.40

243.56 243.46 242.90 242

242.32 243.23 243.91 243.75

1961 240.62 240.24

243.26 242.85 242.28 241

241.18 242.48 243.41 243.38 243.44 243.02 242.40 241

JAN FEB MAR APR MAY JUN JUL AUG SEE' 

Basis of Comparison, IJC Phase II Levels Reference

Cardinal, Monthly Mea

Study

n Levels, IGLD 1955, With Devi ation
Basis of Comparison, IJC Phase II Levels Reference Study

Cardinal, Monthly Mean Le vels, IGLD 1955, With Deviations

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

5 1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

------es- -------em

Average

Std.Dev

Maximum

Minimum

240.88

241.52

240.41

239.89

242.26

242.52

241.98

242.06

241.66

241.93

242.01

243.29

241.91

239.91

241.61

241.77

243.54

242.10

241.07

241.49

241.62

242.19

242.53

242.53

243.20

242.94

241.68

241.81

._------- .-_----em

241.85

0.69

243.54

239.89

240.80

240.99

240.11

240.08

242.20

242.53

241.76

241.86

241.62

241.66

242.20

243.19

241.92

240.62

241.70

241.78

242.86

241.80

241.08

241.44

241.46

242.46

242.00

242.03

242.84

243.64

241.55

241.64

FEB

241.16 242.70

241.11 242.68

240.47 241.83

240.77 241.57

242.33 242.78

242.67 243.60

242.13 242.54

241.70 242.36

241.76 242.62

241.88 242.50

242.14 242.71

243.31 244.02

241.50 242.10

240.19 240.60

242.60 243.62

241.88 242.32

242.03 243.32

241.91 242.99

241.32 242.40

241.96 242.12

241.66 242.38

241.98 242.36

242.46 243.48

242.72 243.26

243.04 243.79

242.75 243.80

241.38 242.38

241.76 243.23

.---_--____---------------- .___-________---____---- _--__--___-_-______-------------- -------_-----__---------~~---~~~~~~~~~-

241.92 242.76 243.30 243.50 243.37 242.91 242.30 241.

0.56 0.56 0.49 0.53 0.54 0.58 0.64 0.

243.31 244.07 244.34 244.80 244.77 244.40 244.10 243.

240.19 240.60 241.03 240.96 241.56 241.24 240.27 239.

_------- --------

241.73

0.65

243.64

240.08

JUL

243.40 243.55 243.38 243.20

243.74 243.97 243.68 243.32

242.73 243.01 242.92 242.43

242.76 243.04 243.05 242.74

243.50 243.89 243.76 243.40

244.34 244.80 244.77 244.27

243.14 243.82 243.81 243.22

243.08 243.30 242.88 242.30

243.14 243.42 243.40 242.88

242.94 243.03 243.05 242.67

243.52 243.50 243.58 243.11

243.95 243.42 242.45 241.90

243.02 242.93 242.24 241.24

241.03 240.96 241.56 241.40

243.86 243.43 242.90 242.66

242.36 242.46 242.84 242.58

243.40 243.10 242.66 242.28

243.35 243.08 242.96 242.59

242.64 242.97 243.01 242.72

242.82 243.22 243.24 242.80

242.55 242.71 242.53 242.16

243.40 243.26 242.81 242.48

243.94 244.17 243.86 243.05

243.49 243.26 242.93 242.27

243.51 243.94 243.70 243.53

243.15 243.09 242.87 242.07

243.25 243.22 243.14 242.80

243.94 244.19 243.83 243.17

242.68

242.68

241.84

242.58

242.97

243.60

242.48

241.66

242.25

242.19

242.07

240.77

240.27

241.03

241.99

242.00

241.68

242.05

241.72

241.98

241.66

241.90

242.05

241.61

243.03

241.54

242.28

242.55

OC

242.

241.

240.

242.

242.

242.

241.

241.

241.

241.

241.

239.

239.

240.

241.

241.

241.

241.

241.

241.

241.

241.

241.

240.

243.

240.

241.

242.
Iroquois, with Discretionary Actions

Basis of Comparison, 1930-l 960

239 . ..-...- . . . . . . - . . . ..-. _* . . . . _...-..._ . . . . - . . . ..-.-.. - . . . . . __ . . . . . . . . . _ _....._.._....._._._.-.. _ *_.._.__...._......._.._. _ .._..__.____.__.__

2.TJ93d ’ ’ 193s ’ ’ ’ ’ ’ 19'46 " 'ld45 " "1950""I195d '

I

' '1960

Year

Iroquois, with Discretionary Actions

Basis of Comparison, 1960-1990

Year

98
JAN FEB MAR APR MAY JUN JUL AUG SEP OC

1900 242.16 242.24

1901 241.44 241.21

1902 241.49 241.46

1903 241.32 241.29

1904 240.55 240.98

1905 240.86 240.65

1906 241.57 241.10

1907 242.02 241.27

1908 241.93 241.20

1909 240.45 240.80

1910 241.06 241.32

1911 240.97 241.19

z3

1912 242.35 241.99

1913 242.20 241.77

1914 241.30 241.07

1915 240.82 241.28

1916 241.52 241.20

1917 241.18 241.27

1918 241.14 240.92

1919 241.54 240.79

1920 240.97 240.94

1921 241.90 241.04

1922 241.46 241.59

1923 240.66 240.64

1924 241.93 241.71

1925 240.37 240.42

1926 240.94 240.65

1927 241.75 241.04

1928 243.13 242.45

1929 241.75 241.23

1930 242.00 241.92

1931 240.80 240.73

Basis of Comparison, IJC Phase II Levels Reference Study

Iroquois, Monthly Mean Levels, IGLD 1955, With Deviations

242.10 242.76 243.05 243.28 243.25 243.04 242.16 241.6

241.46 242.45 242.81 242.90 242.58 242.33 241.73 241.2

241.92 242.34 242.90 243.65 243.98 242.78 241.70 241.0

241.73 242.54 242.31 242.60 242.91 242.45 241.54 240.9

241.49 242.45 243.00 243.27 242.99 241.91 241.11 240.6

240.98 242.31 242.74 242.96 242.67 242.03 241.09 240.5

241.08 241.89 242.70 243.28 243.14 242.44 241.69 241.3

241.06 241.66 242.46 242.93 242.85 242.25 241.49 240.9

241.40 242.08 242.63 242.70 242.31 241.57 241.02 240.6

241.26 242.11 242.71 242.77 242.38 241.86 241.42 241.0

241.75 242.22 242.72 242.94 242.92 242.53 241.87 241.3

241.55 242.81 243.71 244.08 244.18 243.78 243.42 243.0

242.00 242.95 243.62 244.11 243.24 242.40 241.90 241.2

241.41 242.49 242.69 242.56 242.36 242.03 241.33 240.9

241.28 242.16 242.59 242.69 242.52 242.32 241.72 241.0

241.38 242.11 243.02 243.07 243.10 243.24 242.05 241.3

241.23 242.12 242.73 243.45 243.12 241.67 241.09 240.9

241.56 242.25 242.40 242.80 242.80 241.75 240.82 240.4

241.14 241.52 241.89 242.38 242.50 242.07 241.52 240.9

240.83 241.52 242.39 242.65 242.05 241.34 241.04 240.7

241.28 242.24 243.02 243.46 243.82 242.98 242.02 241.3

241.20 241.75 242.32 242.68 242.75 242.42 242.08 241.7

241.74 242.54 242.92 242.95 242.62 242.08 241.42 241.0

241.16 242.54 243.36 243.56 243.29 243.02 242.62 242.2

241.80 242.66 243.25 243.28 243.01 242.52 241.92 241.3

241.51 241.94 242.38 242.70 242.54 242.24 241.80 241.4

240.64 242.22 243.20 243.46 243.37 243.19 242.98 241.9

241.20 241.68 242.48 243.36 243.67 243.02 242.42 241.8

242.14 242.71 242.99 243.36 243.25 242.60 241.54 241.1

241.32 242.37 243.12 243.17 242.86 241.82 241.21 240.7

242.21 242.40 242.46 242.64 242.49 241.88 241.24 240.7

241.02 242.36 243.24 243.67 243.74 243.46 243.02 242.5
1932 242.49 242.46 242.38 242.88 243.17 243.56 243.96

1933 242.58

243.83

242.56 242.76 243.77 243.92 244.09 244.20

1934

243.80

241.78 241.61 241.60 242.86 243.69 243.80 243.73

1935

243.22

240.90 240.68 240.77 241.64 242.28 242.83 243.08 242.72

1936 240.28 239.75 240.42 242.74 243.21 243.20 242.97

1937 241.17

242.42

241.77 241.64 242.79 243.51 244.01 243.52

1938

242.96

241.60 241.94 241.99 242.46 242.76 243.49 243.55

1939

243.61

241.17 241.16 241.86 242.69 242.97 243.03 243.21

1940

243.32

240.99 240.62 240.64 242.30 243.16 243.15 242.97

1941 241.84

242.40

241.62 241.75 243.08 243.73 243.71 243.63

1942

243.28

241.70 241.66 242.25 242.96 243.24 243.28 243.16 242.70

1943 241.84 241.36 241.43 242.09 243.00 243.68 243.22

1944

242.23

241.09 240.93 241.13 242.04 242.72 242.87 242.54

1945 241.04

242.05

241.10 241.84 242.27 242.71 242.83 242.46

1946

241.73

241.86 241.06 241.17 241.02 241.88 242.63 242.66

1947 241.43

242.26

241.15 241.18 242.08 242.74 243.64 243.50

1948 241.31

242.70

-240.99 241.39 242.00 242.24 242.31 242.26

1949 241.42

241.90

241.45 241.58 242.09 242.61 243.18 243.22 242.73

1950 241.82 241.89 241.94 242.70 242.66 242.82 242.80 242.52

1951 241.97 241.39 241.70 242.73 243.06 242.46 242.36 241.88

1952 241.99 241.92 241.85 242.57 242.82 242.80 242.29

1953

241.82

241.42 241.06 241.24 241.76 242.51 242.58 242.43 241.91

1954 241.32 241.42 241.69 242.38 242.86 242.56 242.31 242.07

1955 242.24 241.31 241.56 242.31 242.29 242.33 242.40 242.02

1956 241.18 240.97 241.00 241.68 242.41 242.46 242.01 241.68

1957 241.20 241.22 241.43 242.08 242.96 243.58 243.36 242.56

1958 241.61 241.68 242.14 243.33 244.05 244.24 244.23 244.08

1959 241.70 241.95 242.17 242.92 243.14 243.08 243.14 243.11

1960 242.23 241.95 241.85 242.78 243.40 243.17 242.68

1961 240.22

242.33

239.84 240.82 242.19 243.06 242.91 242.97 242.56

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

Basis of Comparison, IJC Phase II Levels Reference

Iroquois, Monthly Mean

Study

Levels, IGLD 1955, With Devi ations

243.38 243.

243.33 242.

242.78 242.

242.16 241.

241.96 241.

242.52 242.

243.02 241.

242.85 242.

242.19 241.

242.80 242.

242.05 241.

241.21 240.

241.58 241.

241.27 240.

241.64 241.

241.46 240.

241.38 241.

242.25 241.

241.84 241.

241.24 240.

241.15 240.

241.42 240.

241.58 241.

241.39 241.

241.26 240.

241.98 241.

243.77 242.

242.54 242.

241.79 241.

241.91 241.
1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

s

1974

c1 1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

=========

Average

Std.Dev

Maximum

Minimum

240.49

241.16

240.00

239.57

241.91

242.19

241.50

241.62

241.26

241.48

241.62

242.84

241.44

239.26

241.11

241.37

243.10

241.71

240.49

241.02

241.14

241.76

242.09

242.12

242.74

242.23

241.21

241.45

=======c

241.45

0.69

243.13

239.26

240.42

240.61

239.70

239.77

241.85

242.18

241.25

241.34

241.17

241.16

241.80

242.60

241.32

240.04

241.15

241.40

242.22

241.30

240.52

240.95

240.93

242.00

241.40

241.48

242.20

243.06

241.02

241.24

JAN

240.80 242.44

240.77 242.42

240.12 241.58

240.49 241.30

241.92 242.40

242.36 243.31

241.69 242.03

241.18 241.84

241.32 242.18

241.32 241.93

241.63 242.15

242.66 243.30

240.73 241.34

239.42 239.77

241.95 242.94

241.38 241.70

241.30 242.69

241.32 242.38

240.81 241.80

241.40 241.58

241.13 241.76

241.40 241.76

241.84 242.89

242.11 242.60

242.37 243.08

241.99 243.10

240.80 241.88

241.38 242.94

================

241.45 242.29

0.55 0.58

242.76 243.77

239.42 239.77

_-------

_----me241.29

0.63

243.06

239.70

Basis of

Iroquois,

Comparison, IJC Phase

Monthly Mean Levels,

II Levels

IGLD 1955,

Reference Study

With Deviations

MAR APR MAY JUN JUL AUG SEP OC

243.11

243.50

242.49

242.54

243.21

244.04

242.73

242.54

242.67

242.32

242.92

243.16

242.31

240.21

243.10

241.72

242.68

242.73

241.97

242.34

241.88

242.82

243.27

242.83

242.72

242.34

242.83

243.58

.======z=

242.81

0.55

244.05

240.21

243.24

243.68

242.73

242.78

243.60

244.50

243.45

242.69

242.96

242.45

242.84

242.54

242.12

240.12

242.56

241.90

242.39

242.42

242.37

242.74

242.04

242.60

243.51

242.57

243.20

242.36

242.76

243.72

___----- _---m-v243.01

0.61

244.50

240.12

243.04 242.85 242.31

243.36 242.98 242.32

242.62 242.10 241.49

242.76 242.43 242.28

243.44 243.06 242.61

244.43 243.87 243.18

243.38 242.73 241.93

242.22 241.62 241.03

242.91 242.34 241.70

242.53 242.16 241.62

242.89 242.40 241.30

241.50 241.04 239.87

241.35 240.30 239.36

240.92 240.77 240.38

241.98 241.84 241.21

242.36 242.05 241.37

242.00 241.66 241.05

242.36 241.99 241.39

242.42 242.08 241.00

242.74 242.20 241.26

241.87 241.55 241.04

242.17 241.86 241.26

243.19 242.34 241.28

242.23 241.55 240.86

242.91 242.76 242.24

242.16 241.34 240.85

242.70 242.34 241.81

243.28 242.61 242.00

========================

242.86 242.38 241.75

0.64 0.69 0.75

244.43 244.08 243.77

240.92 240.30 239.36

242.

241.

240.

241.

242.

242.

241.

240.

241.

241.

240.

239.

238.

240.

240.

240.

240.

240.

240.

240.

240.

240.

240.

240.

242.

240

241

241

-----

---we

241

0

243

238
Year

Morrisburg, with Discretionary Actions

Basis of Comparison, 1930-l 960

245

I

Morrisburg, with Discretionary Actions

Basis of Comparison, ‘1960-l 990

2451. ____.. . - .-

I

244 . A

. . . . . . . . . . . . . . . -- . . . . . . . . . ............... I

237- . ..~...-..........-............~..................~~........~.....~...~....-................~.......-..-.......................................

~~llll~lllllllllrlllllllil P 1970 1975 1980 1986 "I1990

Year

102
Basis of Comparison, IJC Phase II Levels Reference Study

Morrisburg I Monthly Mean Levels, IGLD 1955 , With Deviation

JAN FEB MAR APR MAY JUN JUL AUG SEP O

1900 241.68 241.74 241.49 242.12 242.38 242.68 242.66 242.44 241.43 240.

1901 240.89 240.65 240.97 241.83 242.09 242.15 241.79 241.61 240.96 240.5

1902 240.96 240.95 241.36 241.71 242.40 243.24 243.41 241.86 240.72 240.

1903 240.78 240.68 241.00 241.73 241.44 241.88 242.22 241.66 240.61 240.

1904 239.97 240.44 240.90 241.68 242.16 242.40 242.06 240.78 239.96 239.

1905 240.29 240.09 240.46 241.82 242.16 242.28 241.82 241.04 239.99 239.

1906 241.00 240.34 240.36 241.29 242.18 242.79 242.50 241.68 240.89 240.

1907 241.47 240.45 240.22 240.87 241.78 242.28 242.14 241.41 240.58 239.9

1908 241.38 240.38 240.52 241.15 241.66 241.70 241.26 240.45 240.04 239.

1909 239.86 240.25 240.68 241.54 241.94 241.94 241.49 240.93 240.57 240.

1910 240.52 240.80 241.16 241.61 242.06 242.28 242.28 241.84 241.10 240.

1911 240.42 240.67 241.07 242.47 243.36 243.70 243.77 243.34 242.95 242.

5

1912 241.83 241.42 241.44 242.36 242.95 243.40 242.36 241.49 241.00 240.

1913 241.67 240.98 240.54 241.58 241.74 241.58 241.42 241.14 240.42 240.

1914 240.76 240.41 240.70 241.49 241.84 241.93 241.76 241.61 240.89 240.2

1915 240.26 240.73 240.75 241.63 242.66 242.63 242.63 242.68 241.20 240.

1916 240.96 240.48 240.52 241.38 241.92 242.60 242.14 240.52 240.08 240.

1917 240.64 240.73 240.97 241.48 241.60 242.00 241.87 240.60 239.63 239.

1918 240.55 240.25 240.30 240.56 241.02 241.64 241.78 241.29 240.66 240.0

1919 240.96 239.99 240.02 240.72 241.56 241.69 241.00 240.27 240.08 239.

1920 240.42 240.40 240.76 241.75 242.57 243.03 243.36 242.26 241.16 240.4

1921 241.35 240.26 240.38 240.94 241.57 242.02 242.14 241.81 241.48 241.

1922 240.94 241.10 241.14 241.87 242.17 242.16 241.71 241.18 240.54 240.

1923 240.08 240.08 240.65 242.15 242.98 243.04 242.69 242.46 242.05 241.6

1924 241.39 241.10 241.23 242.15 242.65 242.61 242.30 241.75 241.16 240.4

1925 239.76 239.84 240.99 241.34 241.85 242.24 242.04 241.71 241.24 240.

1926 240.38 240.09 240.10 241.86 242.81 243.06 242.93 242.72 242.48 241.

1927 241.19 240.32 240.46 240.98 241.96 242.92 243.24 242.42 241.80 241.

1928 242.66 241.73 241.38 241.97 242.26 242.72 242.52 241.74 240.58 240.

1929 241.19 240.41 240.47 241.48 242.16 242.20 241.85 240.66 240.12 239.

1930 241.46 241.13 241.30 241.42 241.46 241.71 241.55 240.96 240.34 239.9

1931 
Basis of Comparison, IJC Phase II Levels Reference Study

Morrisburg I Monthly Mean Levels, IGLD 1955, With Deviations

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

1932 242.02 241.83

1933 242.12 242.12

1934 241.28 241.12

1935 240.34 240.12

1936 239.67 239.12

1937 240.62 241.25

1938 241.10 241.43

1939 240.62 240.64

1940 240.43 240.05

1941 241.29 241.02

1942 241.19 241.18

1943 241.28 240.61

1944 240.54 240.34

1945 240.49 240.58

1946 241.31 240.25

1947 240.88 240.40

1948 240.77 240.37

E

1949 240.88 240.82

1950 241.32 241.26

1951 241.42 240.57

1952 241.44 241.12

1953 240.84 240.30

1954 240.79 240.84

1955 241.71 240.49

1956 240.63 240.37

1957 240.66 240.63

1958 241.10 241.19

1959 241.19 241.48

1960 241.70 241.28

1961 239.61 239.22

241.74 242.23 242.50 243.03 243.52 243.36 242.90 242.

242.35 243.37 243.38 243.60 243.78 243.36 242.86 242.

241.12 242.53 243.40 243.48 243.37 242.84 242.38 242.

240.24 241.25 241.93 242.48 242.69 242.27 241.69 241.

239.86 242.35 242.76 242.75 242.53 241.95 241.46 241.

241.04 242.42 243.05 243.55 242.92 242.31 241.92 241.

241.36 241.80 242.14 243.04 243.10 243.15 242.45 241.

241.40 242.17 242.33 242.42 242.68 242.86 242.35 241.

240.10 241.94 242.70 242.55 242.32 241.71 241.61 241.

241.22 242.75 243.42 243.33 243.22 242.84 242.34 242.

241.79 242.36 242.62 242.60 242.51 242.00 241.31 240.

240.62 241.30 242.16 242.78 242.24 241.10 240.03 239.

240.55 241.47 242.06 242.15 241.73 241.25 240.79 240.

241.32 241.54 241.92 241.96 241.50 240.70 240.30 239.

240.31 240.13 241.24 242.06 242.04 241.57 240.92 240.

240.46 241.31 241.88 242.74 242.54 241.63 240.26 239.

240.73 241.17 241.34 241.38 241.40 241.07 240.57 240.

240.88 241.41 242.00 242.72 242.75 242.22 241.70 241.

241.28 241.92 241.79 242.05 242.09 241.82 241.05 240.

240.81 241.84 242.10 241.39 241.32 240.90 240.25 239.

240.92 241.60 241.82 241.75 241.23 240.81 240.12 239.

240.48 240.96 241.75 241.72 241.60 241.03 240.54 240.

240.92 241.59 241.96 241.60 241.42 241.29 240.76 240.

240.67 241.37 241.29 241.42 241.63 241.22 240.56 240.

240.28 240.92 241.54 241.51 241.03 240.76 240.31 239.

240.81 241.51 242.48 243.12 242.72 241.82 241.24 240.

241.69 243.00 243.72 243.86 243.83 243.66 243.30 241.9

241.65 242.30 242.45 242.40 242.54 242.64 242.02 241.

241.16 242.11 242.66 242.30 241.81 241.54 241.05 240.6

240.29 241.79 242.57 242.21 242.28 241.87 241.16 240.
1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

--------- _--------

Average

Std.Dev

Maximum

Minimum

JAN FEB MAR APR MAY JUN JUL AUG SEP O

239.90 239.84 240.27 242.08 242.72 242.81 242.59 242.36 241.77 241

240.63 240.04 240.28 242.08 243.18 243.31 242.93 242.50 241.81 241

239.37 239.07 239.61 241.24 242.16 242.36 242.22 241.63 240.98 240

239.07 239.31 240.08 240.93 242.25 242.45 242.37 242.00 241.86 241

241.41 241.36 241.32 241.84 242.83 243.20 243.02 242.60 242.12 241

241.71 241.68 241.93 242.92 243.66 244.12 243.96 243.31 242.58 241

240.76 240.47 241.04 241.27 242.15 242.94 242.77 242.00 241.08 240

240.98 240.54 240.39 241.03 241.72 241.78 241.20 240.56 240.04 239

240.65 240.51 240.65 241.53 241.98 242.30 242.19 241.54 240.87 240

240.80 240.40 240.47 241.06 241.38 241.59 241.76 241.39 240.75 240

241.04 241.20 240.86 241.30 242.02 241.84 241.83 241.29 240.08 239

242.17 241.68 241.66 242.18 241.95 241.15 239.97 239.66 238.39 237

240.74 240.40 239.50 240.11 241.20 240.85 239.91 238.76 237.82 236

238.20 239.12 238.12 238.40 238.88 238.74 239.90 239.79 239.32 238

240.32 240.28 240.94 241.92 241.94 241.18 240.52 240.54 239.96 239

240.78 240.86 240.60 240.75 240.72 241.05 241.64 241.24 240.40 239

242.46 241.23 240.15 241.73 241.57 241.28 240.98 240.70 240.07 239

241.14 240.53 240.39 241.48 241.79 241.41 241.46 241.09 240.35 239

239.56 239.64 240.00 240.90 240.95 241.46 241.52 241.12 239.86 239

240.30 240.20 240.53 240.76 241.64 242.06 241.98 241.30 240.12 239

240.40 240.12 240.33 240.81 240.84 241.00 240.83 240.60 240.07 239

241.14 241.33 240.51 240.84 241.95 241.60 241.18 240.90 240.28 239

241.44 240.47 240.89 242.01 242.26 242.52 242.17 241.22 240.06 239

241.52 240.63 241.20 241.59 241.83 241.50 241.13 240.42 239.66 238

242.09 241.24 241.34 242.00 241.48 242.08 241.68 241.57 241.00 241

241.11 242.19 240.80 242.04 241.08 241.22 241.06 240.20 239.74 239

240.51 240.20 239.90 241.12 242.22 242.09 242.06 241.66 241.11 240

240.94 240.65 240.83 242.54 243.08 243.04 242.46 241.77 241.15 240

._------- ----------------------------------------------------========------------

__________-_________--------------------------------

240.87 240.63 240.75 241.60 242.10 242.27 242.11 241.58 240.92 240

0.73 0.64 0.60 0.69 0.72 0.81 0.85 0.90 0.98 1

242.66 242.19 242.35 243.37 243.72 244.12 243.96 243.66 243.30 242

238.20 239.07 238.12 238.40 238.88 238.74 239.90 238.76 237.82 236

Basis of Comparison, IJC Phase II Levels Reference Study

Morrisburg, Monthly Mean Levels, IGLD 1955, With Deviation
Long Sad, with Discretionary Actions

Basis of Comparison, 1930-i 9&I

Year

Long Sault, with Discretionary Actions

Basis of Comparison, 1960-l 990

.............................................................................................

... .. ....- ................................... ...... .....................................................................

23 '19'ss ' "19'76 ' ' '19175 ” ”1980” ’ ”1985 ' ' '1990 '

Year

106
1900

1901

1902

1903

1904

1905

1906

1907

1908

1909

1910

1911

c1

s

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

JAN FEB

241.28 241.34 240.98 241.59 241.82 242.18 242.17 241.94 240.84 24

240.44 240.19 240.58 241.32 241.50 241.52 241.14 241.01 240.32 23

240.52 240.54 240.90 241.20 241.98 242.90 242.95 241.11 239.90 23

240.34 240.18 240.38 241.06 240.72 241.29 241.66 241.01 239.84 23

239.48 240.00 240.42 241.04 241.46 241.69 241.29 239.84 239.00 23

239.82 239.63 240.02 241.42 241.68 241.71 241.10 240.21 239.08 23

240.52 239.71 239.76 240.79 241.76 242.38 241.98 241.04 240.23 23

241.02 239.77 239.52 240.21 241.21 241.74 241.55 240.70 239.83 23

240.94 239.70 239.80 240.38 240.85 240.87 240.39 239.52 239.23 23

239.36 239.79 240.21 241.07 241.30 241.25 240.75 240.16 239.86 23

240.06 240.38 240.69 241.10 241.50 241.74 241.77 241.27 240.46 239

239.95 240.24 240.67 242.19 243.09 243.39 243.44 242.98 242.56 24

241.40 240.94 240.97 241.87 242.40 242.82 241.64 240.73 240.26 23

241.24 240.32 239.82 240.84 240.97 240.76 240.64 240.41 239.67 239

240.32 239.87 240.21 240.94 241.22 241.30 241.14 241.02 240.21 23

239.78 240.28 240.22 241.24 242.36 242.27 242.24 242.23 240.50 23

240.50 239.88 239.93 240.77 241.25 241.90 241.32 239.55 239.24 23

240.19 240.28 240.48 240.86 240.95 241.34 241.10 239.64 238.63 23

240.06 239.69 239.60 239.77 240.30 241.03 241.18 240.65 239.94 23

240.48 239.32 239.34 240.07 240.87 240.90 240.12 239.38 239.28 239

239.95 239.95 240.34 241.34 242.20 242.67 242.98 241.68 240.44 23

240.90 239.61 239.70 240.26 240.94 241.47 241.64 241.30 240.99 24

240.51 240.69 240.64 241.32 241.55 241.52 240.96 240.44 239.80 23

239.60 239.62 240.24 241.84 242.68 242.60 242.20 242.00 241.58 241

240.94 24'0.60 240.77 241.73 242.16 242.06 241.72 241.11 240.53 239

239.27 239.36 240.56 240.85 241.41 241.86 241.64 241.28 240.78 24

239.92 239.63 239.65 241.57 242.50 242.73 242.57 242.34 242.06 240

240.72 239.72 239.86 240.40 241.54 242.57 242.89 241.93 241.29 24

242.28 241.14 240.74 241.36 241.65 242.19 241.93 241.02 239.78 239

240.73 239.74 239.76 240.75 241.38 241.39 241.02 239.70 239.21 238

241.01 240.47 240.54 240.60 240.62 240.94 240.76 240.20 239.58 239

239.76 239.72 240.08 241.72 242.60 242.88 242.94 242.62 242.13 241

Basis of Comparison, IJC Phase II Leve Is Reference Stud

Long Sault Dam, Monthly Mean Level.SI IGLD 1955, With Deviat

MAY JUN JUL
1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Y 1949

9 1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961

JAN FEB MAR APR MAY JUN JUL AUG SEP 

241.64 241.32 241.20 241.68 241.95

241.75 241.76

242.59 243.17 242.99 242.52 242

242.02 243.04 242.94

240.87 240.71

243.19 243.45 243.00 242.48 241

240.73 242.27 243.16

239.88 239.66

243.22 243.09 242.52 242.05 241

239.80 240.93 241.64

239.17 238.60

242.19 242.36 241.91 241.30 240

239.40 242.04 242.40

240.18 240.82 240.55 242.11 242.68

242.39 242.16 241.56 241.04 240

240.68 241.00

243.18 242.41 241.76 241.42 241

240.85 241.26 241.63

240.17

242.68 242.73 242.78 241.98 240

240.21 241.02 241.73 241.80

239.97 239.58

241.92 242.25 242.49 241.94 241

239.65 241.65 242.32

240.83 240.51

242.06 241.78 241.13 241.12 240

240.78 242.48 243.16

240.78 240.77

243.03 242.90 242.47 241.94 241

241.40 241.88 242.11

240.83 239.98

242.03 241.98 241.42 240.70 240

239.94 240.64 241.48

240.08 239.85

242.03 241.42 240.17 239.05 238

240.06 241.00 241.52

240.03 240.14

241.56 241.05 240.58 240.14 239

240.88 240.93 241.26

240.85 239.56

241.22 240.71 239.84 239.49 238

239.61 239.39 240.72

240.42 239.77

241.60 241.53 241.01 240.31 239

239.86 240.67 241.17

240.32 239.86

241.99 241.76 240.74 239.26 238

240.18 240.49 240.60

240.44 240.30

240.62 240.68 240.38 239.90 239

240.30 240.85 241.50

240.90

242.34 242.37 241.80 241.26 240

240.74 240.73 241.27 241.08

240.98 239.89

241.42 241.50 241.24 240.40 239

240.06 241.10 241.31

241.00 240.46

240.48 240.45 240.09 239.43 239

240.15 240.80 240.99

240.35 239.66

240.88 240.34 239.97 239.27 238

239.85 240.28 241.12

240.35

241.00 240.92 240.30 239.81 239

240.36 240.29 240.94 241.22

241.28

240.80 240.68 240.64 240.08 239

239.81 239.93 240.59 240.45

240.18 239.87

240.66 240.98 240.56 239.86 239

239.68 240.29 240.82

240.21 240.13

240.72 240.22 239.99 239.53 239

240.29 241.04 242.09

240.68

242.74 242.20 241.21 240.63 240

240.79 241.32 242.73 243.45

240.78

243.54 243.50 243.32 242.92 241

241.08 241.22 241.78 241.88

241.26

241.84 242.05 242.24 241.60 241

240.74 240.59 241.56 242.04

239.10 238.70

241.59 241.09 240.88 240.44 240

239.85 241.46 242.17 241.64 241.72 241.30 240.54 240

Basis of Comparison, IJC Phase II

Long Saul t Dam, Monthly

Levels Reference Study

Mean Levels, IGLD 1955, With Deviat
JAN FEB MAR APR MAY JUN JUL AUG SEP OC

1962 239.41

1963 240.19

1964 238.84

1965 238.66

1966 241.00

1967 241.32

1968 240.16

1969 240.45

1970 240.16

1971 240.25

1972 240.56

1973 241.62

1974 240.15

1975 237.32

1976 239.68

1977 240.29

1978 241.92

1979 240.68

1980 238.80

1981 239.71

1982 239.78

1983 240.62

1984 240.90

1985 241.02

1986 241.55

1987 240.17

1988 239.92

1989 240.51

Average 240.39

Std.Dev 0.77

Maximum 242.28

Minimum 237.32

Basis of Comparison, IJC Phase II Levels Reference Study

Long Sault Dam, Monthly Mean Levels, IGLD 1955, With Deviatio

239.36 239.83 241.80 242.41 242.46 242.22 241.96 241.34 241.1

239.58 239.87 241.79 242.92 243.00 242.58 242.10 241.39 240.5

238.54 239.19 240.98 241.90 242.06 241.89 241.25 240.57 239.5

238.92 239.75 240.62 242.02 242.17 242.05 241.65 241.51 241.1

240.94 240.81 241.39 242.51 242.88 242.67 242.23 241.71 241.3

241.28 241.57 242.60 243.34 243.80 243.59 242.85 242.09 240.9

239.82 240.51 240.64 241.67 242.52 242.26 241.40 240.37 239.7

239.88 239.74 240.36 241.05 241.03 240.35 239.67 239.22 239.2

239.96 240.10 241.00 241.40 241.75 241.60 240.87 240.18 239.5

239.78 239.76 240.33 240.60 240.87 241.12 240.75 240.03 239.3

240.70 240.23 240.60 241.27 241.01 240.95 240.36 239.06 237.9

240.93 240.84 241.27 240.94 239.99 238.69 238.51 237.14 236.3

239.62 238.46 239.09 240.28 239.80 238.70 237.47 236.53 235.3

238.35 237.04 237.25 237.76 237.58 239.05 238.98 238.44 237.8

239.56 240.11 241.08 240.98 240.04 239.30 239.46 238.92 238.2

240.42 239.97 239.96 239.89 240.34 241.04 240.58 239.58 238.3

240.41 239.18 240.94 240.65 240.37 240.13 239.90 239.25 238.8

239.90 239.62 240.72 241.01 240.57 240.71 240.34 239.49 238.4

238.90 239.32 240.15 240.09 240.71 240.78 240.32 238.90 238.3

239.58 239.81 240.08 241.07 241.49 241.37 240.55 239.17 238.1

239.44 239.66 240.02 239.98 240.13 239.98 239.82 239.26 238.7

240.77 239.76 240.08 241.23 240.76 240.37 240.10 239.45 238.9

239.70 240.10 241.28 241.42 241.70 241.32 240.29 239.03 239.0

239.94 240.44 240.74 241.01 240.62 240.22 239.48 238.65 237.9

240.43 240.49 241.10 240.46 241.15 240.66 240.58 239.96 240.4

241.47 239.80 241.15 240.04 240.28 240.14 239.25 238.81 238.1

239.52 239.15 240.49 241.73 241.54 241.53 241.10 240.53 240.2

240.17 240.38 242.20 242.67 242.48 241.79 241.08 240.46 239.9

____________________---------------------------------------------------- ____-_-_-___________---------------------------------------------------- 

240.08 240.17 241.02 241.50 241.67 241.48 240.92 240.23 239.7

0.66 0.68 0.82 0.90 1.00 1.05 1.10 1.18 1.2

241.76 242.02 243.04 243.45 243.80 243.59 243.32 242.92 242.1

238.35 237.04 237.25 237.76 237.58 238.69 237.47 236.53 235.3
Yew

Montreal Harbour, Discretionary Actions

Basis of Comparison, 1950-l 990

.............I...................................................................... ............................................

......................-. .........

‘9!3J B’ 1 I

1980

1

19170

I

ld80

I I

1990

Yi3X

Lake St. Pierre, Discretionary Actions

Basis of Comparison, 1950-l 990

Year

110
1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961

w

c1 1962

w 1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

Basis of Comparison, IJC Phase I

Pointe Clai ret Monthly Mean Levels,

I Leve 1 s Reference Study

IGLD 1 955, With Deviatio

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

67.78 68.27 68.50 70.67 70.73 69.78 69.03 68.70 68.90 68.

68.18 69.19 70.18 73.43 71.95 70.77 70.73 69.82 69.55 69.

68.41 69.55 70.21 72.21 72.08 71.49 70.64 70.18 69.72 69.3

68.18 69.00 69.72 71.29 70.14 69.72 69.29 69.26 68.93 68.

67.29 67.78 69.39 71.49 71.13 70.90 69.95 69.06 69.19 70.0

68.37 69.19 70.01 72.67 70.96 69.88 68.96 68.80 68.67 68.

67.49 67.62 68.21 70.24 71.10 70.83 70.14 69.65 69.85 69.

67.65 68.01 68.47 68.47 68.27 68.01 69.91 69.03 68.83 68.3

67.98 67.75 67.75 68.50 67.49 67.75 67.81 67.68 68.01 68.

67.59 67.42 67.75 70.28 70.05 69.16 68.37 67.55 67.65 67.7

68.21 68.90 68.86 71.62 72.34 70.51 70.47 69.39 68.57 68.1

67.42 67.39 67.45 67.88 68.50 69.16 69.13 68.83 68.93 68.

67.52 67.42 67.29 68.11 68.08 67.59 67.45 67.52 67.45 67.4

67.19 67.09 66.86 68.24 67.59 67.39 67.29 67.39 67.52 67.4

67.45 67.32 67.22 67.19 67.03 67.06 66.90 66.96 66.99 66.

66.44 66.37 66.24 66.90 67.06 66.63 66.73 67.03 67.26 68.1

67.95 67.81 69.09 69.26 68.08 67.88 67.49 67.59 67.59 67.

67.95 68.11 67.42 69.39 69.26 68.73 68.60 68.50 68.44 69.

69.00 69.06 68.93 70.44 68.64 68.27 68.83 68.93 69.16 68.

68.31 69.03 68.96 70.80 71.03 70.51 70.28 70.11 69.32 68.6

67.88 68.14 68.31 69.82 70.44 69.42 69.49 69.42 69.03 69.

68.34 68.64 69.26 71.33 71.82 69.78 68.93 68.77 69.00 68.

67.78 67.91 68.73 70.96 72.51 71.16 71.33 71.10 70.83 70.6

69.39 70.51 72.01 72.87 72.93 72.54 72.11 71.10 70.80 70.7

68.80 69.65 71.13 72.44 73.69 72.77 71.82 71.19 70.60 70.4

69.32 68.96 70.41 71.75 71.69 71.00 69.39 68.96 69.13 69.

68.73 69.36 70.93 73.39 72.80 72.08 71.92 71.06 70.51 70.4

67.81 67.45 69.78 71.49 70.54 69.13 68.67 68.86 69.39 70.4

69.26 70.47 70.47 71.72 71.95 70.70 69.85 69.42 69.19 69.3

67.85 68.67 70.34 71.82 72.34 70.73 69.75 69.46 69.88 70.3

69.52 69.13 69.16 71.06 70.96 69.82 69.72 69.91 70.14 70.2
-~-_ . --. - -

..__---_- ^

--- ---- --- _- -7

___ -.-

1981 68.47 69.55 70.41 71.00 69.75 69.69 69.26 69.62 70.51 70.5

1982 68.47 68.73 69.03 71.13 70.87 70.28 69.95 69.26 69.13 69.2

1983 68.86 69.03 70.14 70.73 72.21 71.33 69.88 69.55 69.32 69.2

1984 68.60 69.95 70.28 71.95 71.72 71.29 70.87 70.64 70.54 69.8

1985 68.77 69.55 70.67 71.88 71.88 70.64 70.44 70.41 70.18 69.9

1986 68.83 70.21 70.67 72.21 72.08 71.59 71.36 71.26 71.19 71.3

1987 70.51 69.95 71.23 71.95 71.06 70.67 70.31 69.95 69.55 69.6

1988 68.60 69.06 69.23 70.37 69.39 68.64 68.21 68.44 68.44 68.8

1989 67.75 68.01 67.85 68.60 69.23 70.05 69.65 69.32 69.00 68.7

--------- --------- --------------------________________I___------------------------------------------

------------------------------------------------------------------------------

Basis of Comparison, IJC Phase II Levels Reference Study

Pointe Claire, Monthly Mean Levels, IGLD 1955, With Deviation

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

Average 68.25 68.63 69.21 70.69 70.53 69.88 69.52 69.24 69.17 69.1

Std.Dev 0.76 1.00 1.35 1.67 1.78 1.51 1.34 1.15 1.05 1.0

Maximum 70.51 70.51 72.01 73.43 73.69 72.77 72.11 71.26 71.19 71.3

Minimum 66.44 66.37 66.24 66.90 67.03 66.63 66.73 66.96 66.99 66.9
1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961 c1

t;

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

JAN FEB MAR APR MAY JUN JUL AUG SEP OC

18.70 18.93 19.19 23.16 22.83 21.19 19.88 19.26 19.49 19.

19.00 20.05 21.52 28.05 24.64 22.01 21.98 20.60 20.31 20.

19.55 20.70 21.46 25.69 25.00 23.59 21.88 21.33 20.54 20.

19.09 20.14 21.75 24.61 22.15 20.73 20.01 19.78 19.36 18.

17.59 18.24 20.70 24.80 23.59 22.97 21.16 19.78 20.08 21.

19.52 20.18 21.42 26.44 23.16 20.93 19.59 19.23 19.09 19.

18.01 18.08 18.80 22.51 23.69 22.57 21.26 20.57 21.00 20.

18.34 18.70 19.55 20.08 19.59 18.96 21.85 19.78 19.62 19.

19.26 18.77 18.86 21.46 18.96 18.86 18.80 18.37 18.96 20.

18.31 18.14 18.54 23.06 21.98 20.24 19.06 18.08 18.27 18.

19.23 20.11 19.98 25.43 25.85 21.98 21.92 20.34 19.16 18.

17.78 17.81 18.21 20.01 20.54 20.37 20.28 19.72 19.88 19.

18.04 17.98 17.88 20.70 20.18 18.44 17.98 17.98 17.68 17.

17.39 17.26 17.16 21.06 19.52 18.14 17.59 17.72 18.08 17.

18.14 17.95 18.27 19.36 18.54 17.95 17.32 17.13 17.09 17.

16.77 16.67 16.77 18.18 18.80 17.22 16.93 17.45 18.01 20.

19.03 18.70 20.83 21.69 19.95 19.13 18.01 18.24 18.01 18.

18.96 19.09 18.14 22.28 21.82 20.64 19.91 19.23 19.09 20.

20.08 20.08 20.34 23.33 19.85 19.13 19.69 19.49 19.69 19.

18.93 19.88 19.85 23.82 24.25 22.05 21.33 21.00 20.01 19.

18.57 18.86 19.16 22.38 23.49 20.87 20.73 20.31 19.69 19.

18.93 19.26 20.21 23.95 25.16 20.90 19.49 19.26 19.55 19.

18.27 18.34 19.42 23.29 26.64 23.26 23.20 22.70 22.05 22.

20.64 22.01 24.70 26.28 26.02 24.67 23.82 22.34 21.85 21.

19.95 20.77 22.87 25.75 28.51 25.75 23.52 22.24 21.36 21.

20.51 19.91 21.85 24.25 24.44 22.60 20.01 19.32 19.59 20.

19.55 20.44 22.87 27.82 25.98 23.69 23.43 22.38 21.52 21.

18.41 17.85 21.52 24.67 22.34 19.91 19.23 19.36 20.01 21.

20.57 21.75 21.59 24.61 24.80 22.05 20.64 19.91 19.59 20.

18.57 19.42 22.38 25.20 25.46 22.38 20.73 20.14 20.87 21.

20.96 20.08 20.31 23.65 22.74 20.67 20.54 20.80 21.06 21.

Basis of Comparison, IJC Phase II LevelS Reference Study

Montreal Harbour, Monthly Mean LeveIs, IGLD 1 955, With Deviati
JAN FEB MAR APR MAY JUN JUL AUG SEP OC

1981 19.16 21.46 22.47 24.11 22.05 21.65 20.24 20.47 21.62 21.8

1982 19.16 19.39 19.98 23.95 22.93 21.26 20.60 19.65 19.55 19.8

1983 20.18 20.28 21.82 23.36 26.35 23.56 20.64 20.11 19.75 19.8

1984 19.52 21.26 21.75 25.39 24.08 23.13 22.28 21.59 21.33 20.4

1985 19.85 20.64 22.44 24.70 24.44 21.75 21.39 21.39 20.83 20.7

1986 19.62 21.19 21.95 25.23 24.28 23.06 22.44 22.41 22.54 22.7

1987 21.59 20.77 22.64 24.57 22.15 21.78 21.03 20.41 20.01 20.3

1988 19.55 20.05 20.11 23.26 21.29 19.26 18.57 19.09 19.06 20.1

1989 18.70 19.00 18.86 21.00 21.62 21.72 20.37 19.78 19.39 19.3

Basis of Comparison, IJC Phase II Levels Reference Study

Montreal Harbour, Monthly Mean Levels, IGLD 1955, With Deviati

-------------w-s----- ----------------------------------------------------------------------------------------

------------------------------------------------------------------

Average 19.10 19.50 20.45 23.58 22.99 21.28 20.48 19.97 19.87 20.1

Std.Dev 1.01 1.29 1.79 2.20 2.44 1.92 1.69 1.40 1.25 1.3

Maximum 21.59 22.01 24.70 28.05 28.51 25.75 23.82 22.70 22.54 22.7

Minimum 16.77 16.67 16.77 18.18 18.54 17.22 16.93 17.13 17.09 17.1
1950 12.27 12.11 12.30 16.31 15.65 14.14 12.83 12.24 12.37 12.17 

1951 12.30 12.96 14.21 20.67 17.13 14.40 14.30 13.19 12.93 13.06 

1952 12.83 13.45 14.01 18.50 17.62 16.14 14.34 13.85 13.16 13.02 

1953 12.43 13.25 14.96 17.78 15.35 13.52 12.80 12.50 12.17 11.84 

1954 11.02 11.58 13.78 17.95 16.67 15.85 13.85 12.63 13.06 14.99 

1955 12.83 13.12 14.30 19.19 16.11 13.68 12.47 12.14 12.01 12.27 

1956 11.42 11.38 11.91 15.68 16.67 15.16 13.81 13.22 13.58 13.39 

1957 11.75 11.98 12.89 13.68 13.09 12.34 14.73 12.63 12.53 12.34 

1958 12.83 12.27 12.40 15.88 13.19 12.66 12.43 11.94 12.43 13.35 

1959 11.78 11.75 12.07 16.60 15.06 13.32 12.27 11.58 11.71 12.14 

1960 12.60 13.29 13.12 18.73 18.54 14.57 14.34 13.12 12.17 11.84 

1961 11.19 11.15 11.91 14.34 14.53 13.55 13.29 12.76 12.86 12.20 

1962 11.45 11.45 11.48 15.12 14.40 12.07 11.48 11.52 11.09 11.55 

1963 10.86 10.76 10.89 15.58 13.91 11.84 11.02 11.22 11.58 11.42 

1964 11.68 11.55 12.20 13.94 12.93 11.88 11.06 10.66 10.66 10.73 

1965 10.63 10.63 10.83 12.30 12.93 11.12 10.60 11.06 11.68 13.75 

1966 12.50 12.17 14.21 15.35 13.91 12.76 11.48 11.78 11.42 11.58 

1967 12.40 12.40 11.75 16.01 15.42 14.14 13.25 12.37 12.17 13.98 

1968 13.09 13.06 13.68 16.80 13.29 12.43 12.66 12.34 12.40 12.17 

1969 12.14 12.93 12.89 17.19 17.78 14.73 13.85 13.48 12.83 12.24 

1970 12.01 12.20 12.50 16.08 17.16 13.94 13.65 12.99 12.60 12.93 

1971 12.07 12.34 13.22 16.86 18.37 13.78 12.40 12.20 12.50 12.40 

1972 11.68 11.58 12.50 16.24 19.78 16.04 15.72 15.19 14.37 14.57 

1973 13.68 14.76 17.32 18.80 18.41 16.67 15.88 14.67 14.14 14.30 

1974 13.32 13.75 15.45 18.54 21.52 18.08 15.68 14.44 13.65 13.58 

1975 13.52 12.93 14.57 16.83 17.22 15.09 12.66 12.07 12.37 13.06 

1976 12.70 13.52 15.78 20.60 18.60 15.72 15.52 14.93 14.04 14.30 

1977 11.84 11.35 14.63 17.81 15.26 12.89 12.20 12.24 12.76 14.86 

1978 13.71 14.30 14.07 17.55 17.68 14.67 13.25 12.57 12.27 12.70 

1979 12.11 12.57 15.45 18.24 17.91 15.03 13.35 12.80 13.52 14.37 

1980 13.91 13.02 13.25 16.50 15.22 13.29 13.09 13.35 13.62 14.47 

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT 

Basis of Comparison, IJC Phase II Levels Reference Study

Lake St. Pierre, Monthly Mean Levels, IGLD 1955, With Deviation
1981 12.27 

1982 12.37 

1983 13.29 

1984 12.73 

1985 12.93 

1986 12.63 

1987 14.04 

1988 12.73 

1989 12.14 

========================================----===---------------------------------------

Average 12.39 12.65 13.56 16.88 16.18 14.17 13.27 12.79 12.70 13.02 

Std.Dev 0.82 1.03 1.46 1.73 2.06 1.51 1.30 1.05 0.90 1.08 

Maximum 14.04 14.76 17.32 20.67 21.52 18.08 15.88 15.19 14.80 15.03 

Minimum 10.63 10.63 10.83 12.30 12.93 11.12 10.60 10.66 10.66 10.73 

Basis of Comparison, IJC Phase II Levels Reference Study

Lake St. Pierre, Monthly Mean Levels, IGLD 1955, With Deviations

FEB MAR APR MAY JUN JUL AUG SEP OCT 

14.70 15.42 17.29 15.55 14.96 13.16 13.25 14.04 14.44 

12.47 13.09 17.16 15.98 13.81 13.09 12.30 12.27 12.53 

13.32 14.67 16.60 19.78 16.27 13.19 12.66 12.40 12.50 

14.14 14.57 18.34 16.73 15.68 14.76 13.88 13.55 12.86 

13.39 15.09 17.36 16.93 14.17 13.85 13.85 13.19 13.35 

13.71 14.57 18.01 16.63 15.22 14.53 14.60 14.80 15.03 

13.35 14.96 17.16 14.40 14.24 13.42 12.83 12.63 12.99 

12.99 12.96 16.57 14.50 12.27 11.61 12.24 12.14 13.32 

12.30 12.43 14.99 15.45 14.57 12.96 12.43 12.20 12.40 

JAN 
APPENDIX D - The Difference in the Basis of Comparison Levels and Flows with and

without Criterion C

117
1 ....-.-..' Michigan-Huron - Superior I

Differences in BOC Outflows

With minus Without Criterion C

Differences in BOC Levels

With minus Without Criterion C

Year

r. ..I.. Sup& - Mkhlgan-Huron 1

-.-

5 0.2 -........-.................................................._ _._ ....._.......................~...................................................

$ 0.1 ...........I...............-_ ..........................”.-.................................................................._..................

.a

-0.3

-I

. . . . . . . . . . . . . . . . ..~..............~..........~..._~.............__._.............._........~....................~..............._............

I

-0.4 ,iho I 1910 I 1920 I 1930 19401 I

1950

I

1960 1970

I

1980 1990

Year

. . . . . . . . . . St. Cl&r -E&

118
Differences in BOC Levels

With minus Without Criterion C

-Erie ---~ St. Clair

-0.4 l&IO I I . . . . .

Id30

1 I r I

1910 1920 1940 1950 1960 1970 1980 1990

Year

-.....- mati -Ontario,deviatkms

. --

Differences in BOC Outflows

With minus Without Criterion C

t&) _,.._.... _ . . . . . . . . . . . _ . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2g 1o- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..*...........-..........-.. * . . . . . . . . . . . . . . . . . . . . . . . . . ..*..................-....................... -...- . . . . K

-20 _,_..__.__..._.........-..........” . . . . . . . . . . . . . . . . . . ..-........-..-.......................-.............................--....-....- _ . . ..--..-.....

-3

PI 1 I , I

900 l&O l&O 19bO 1940 1950 1960 1970 1980 1990

Year

- Ontario --~~~ Ontario, deviations

*u.s COVERNMENTPRlNTINCOFFlCE1993 -757 -952/60339

119