A RIVER DIVERSION

NIAGARA RIVER WATER DIVERSION

The International Boundary Waters Treaty (1909)
The Niagara River Water Diversion Treaty (1950)

&

NIAGARA RIVER WATER DIVERSION & WATER OUTFLOW CHARTS

 

 

International Boundary Water Treaty (1909)

Prior to 1909, there was no bilateral international agreement between Canada and the United States pertaining to the diversion, uses and/or pollution of waters along their shared borders of the Great Lakes. There were for the most part no rules.

The two countries soon recognized the problems associated to this lack of control and regulation and began negotiations to remedy the problem. From these came an agreement known the

"International Boundary Waters Treaty"

relating to the boundary waters and to questions arising along the boundary between Canada and the United States made between His Majesty, King Edward VII, and the United States, signed at Washington on January 11, 1909, and the protocol of May 5, 1910.

Highlights of this treaty included:

 

...The Boundary Water Treaty (BWT) of 1909 first established limits on the amount of water diverted from the Niagara River for hydro-electric power production.  Our two countries entered into a special agreement...the 1950 Niagara Treaty...which replaced certain paragraphs of the BWT and re-defined the diversion and division of water to protect the scenic beauty of the Falls and at the same time provide for increased hydro-electric power production. ....
 

Len Falkiner, Secretary, International Niagara Board of Control (IJC)
                                                                                  

 

 

Niagara River Water Diversion Treaty (1950)


The Niagara River Water Diversion Treaty between Canada and the United States concerning the uses of the waters of the Niagara River was signed on February 27th 1950 and came into force October 10th 1950. Its purpose is to preserve and enhance the scenic beauty of Niagara Falls and the Niagara River, while providing for the most beneficial use of the river waters.

Limitations on the amount of water diverted from the Niagara River for power generation purposes initially established by the Boundary Waters Treaty of 1909 were terminated and replaced by the 1950 treaty. Temporary diversion agreements for power generation in 1941 and 1948 agreements between the two Governments were rescinded.

The Niagara River Water Treaty of 1950 established new limitations of water diversion for power generation.

The amount of water available for diversion under the provisions of the latest treaty was specified to include:

1. the total outflow from Lake Erie through the Welland Canal

2. the total outflow from lake Erie through the Niagara River (including the Black Rock Canal)

3. not to include the amount of water used and necessary  for domestic/sanitary purposes and for the canals for navigation purposes.

In order to preserve the scenic beauty of the Falls, the Niagara River Water Diversion Treaty of 1950 stipulated that no water diversions for power generation would be allowed that would reduce the flow of water over Niagara Falls as follows:
 

no less than 100,000 cubic feet of water per second (cf/s) From April 1st to September 15th  (inclusive) between 8 a.m. and 10 p.m.

no less than 100,000 cubic feet of water per second (cf/s) from September 16th to October 31st (inclusive) between 8 a.m. and 8 p.m.

no less than 50,000 cubic feet of water per second (cf/s) from November 1st to March 31st (inclusive)

 

The specified rates of water flow over the Falls (listed above) are mandatory minimums. All water specified in this Treaty in excess of water reserved for scenic purposes may be diverted for power purposes.

On April 17th 1973, the governments agreed to use Eastern Daylight Savings Time as the basis of interpreting the hours specified by section IV of the treaty.

Under the terms of this treaty all excess waters available for water diversion for power generation shall be divided equally between Canada and the United States. An exception allows Canada to divert an additional 5,000 cubic feet of water per second from the Welland Canal or the Niagara River by a 1940 government agreement pertaining to the downstream use of waters from Canada's Long Lac and Ogoki water diversions into the Great Lakes. These water diversions are specifically excluded from the waters allocated in the Niagara River Water Diversion Treaty of 1950.

The 1950 Treaty stipulated: "Until such time as there are facilities in the territory of one party to use its full share of the diversions of water for power purposes agreed upon in this Treaty, the other party may use the portion of that share for the use of which facilities are not available".

In order to best utilize the water available for diversion, the New York State Power Authority and Ontario Power Generation signed an agreement on January 19th 1965 to share generation capacity. Both power companies have rented available power generating capacity from each other to maximize utilization of their respective shares of water available for power production. Original ownership of the water shares has been maintained. This agreement allows each company to minimize the costs of equipment outages and to provide for the handling of ice problems. In simple terms, when Ontario Power Generation (OPG) - Sir Adam Beck Power Stations (Canada) has surplus water shares available for diversion and no extra generation capacity, they rent the generation capacity available at New York State Power Authority (NYSPA) - Robert Moses Power Station for power generation. The power generated is for the use of Ontario Power Generation. This agreement is reciprocal and NYSPA does the same with their surplus water share.

The power companies of both countries continue to upgrade their power generators to increase power capacity however their respective abilities to draw water are limited by not only the terms of this treaty but their capacity to draw available waters (refer below).
 

POWER STATION INTAKE CAPACITY

Power Station Name

Cubic Feet Per Second

Robert Moses Generating Station (NYSPA)

109,000

Sir Adam Beck Generating Stations (OPG)

64,400

DeCew Falls Generating Station (OPG)

8,000

Canadian Niagara Power (Fortis) - not producing

35


Ontario Power Generation has a combined water drawing capacity of 72,400 cubic feet per second (includes DeCew Falls Generating Station). At present, New York State Power Authority - Robert Moses Generating Station has a water drawing advantage of approximately 36,600 cubic feet per second.

There are occasions when power generation is reduced below actual capacity at times of low water flow rates in order to maintain the treaty minimal flow over the Falls.

There are occasions when the amount of water in the Niagara River available for diversion exceeds the ability of the power stations to draw this excess. Ontario Power Generation and the Ontario Government are currently studying methods upon which to increase their water share drawing capacity in order to increase power generation capacity.

 

"...The two countries share the water for power production as per Article VI.  This amount, of course, depends on the river flow which changes constantly.  When the level of Lake Erie, and its corresponding outflow, is low, there may not be sufficient water available for maximum power generation.....in either country.  On the other hand, when the opposite is true i.e. high lake levels and river flows the amount of water available for power production exceeds generation/diversion capacity and water will be "spilled" over the Falls (in other words in amounts greater than the required Falls flow minimum). 

A program of unit upgrades at both Ontario Power Generation's Sir Adam Beck and the New York Power Authority's Robert Moses Niagara Power Project, begun in the 1990s and due for completion in the next couple of years has been increasing this generation/discharge capacity.  While the tunnels on the U.S. side are capable of handling their diversions, in all but the most extreme case (short term storm events which can result in very high flow conditions), a new OPG tunnel or tunnels and additional generating station would increase the frequency of maximum water diversion for power generation on the Canadian side..."

Len Falkiner, Secretary, International Niagara Board of Control (IJC)
 

   

The Niagara River Water Diversion Treaty came into force upon the date of the exchange of ratifications [Oct. 10, 1950] and continues in force for a period of fifty (50) years and thereafter until one (1) year from the day on which either party shall give notice to the other party of its intention of terminating the Treaty.

Neither the Lake Erie outflow to the Niagara River nor the flow at Queenston are measured on a continuous, real-time basis.  They are calculated.

Values are calculated from rating tables that determine discharge from the plant generators, based on power output for the operating head, and the outflow from the Maid-of-the-Mist Pool which is determined from a rating curve for the Ashland Avenue gauge.....an equation established from field measurements and verified on a regular basis.

 

  

2002 NIAGARA RIVER WATER AVERAGE DIVERSION 2002
Cubic Feet of Water Per Second (cf/s)
MONTH

CANADIAN POWER

AMERICAN POWER

WATER RESOURCES

       

DeCew
Falls

Sir Adam Beck Group

Robert Moses

Total  Available

Horseshoe
Falls
American
Falls

Total Over Falls

Total Used For Power

Excess
Water
Available

Water Rental
to USA

January 6,109 59,787 71,088 198,397 51,877 9,500 61,377 137,020 1,377 847
February 5,862 60,599 74,937 208,497 57,951 9,111 67,062 141,434 10,062 565
March 5,968 60,847 74,231 207,990 62,401 4,132 66,532 141,258 16,532 388
April (day) 7,381 54,208 57,068 220,362 91,394 10,276 101,670 118,692 1,670 212
April (night) 7,275 58,975 80,234 208,461 52,089 9,853 61,942 146,520 11,942 4,308
May (day) 7,098 56,185 61,200 227,672 92,983 10,170 103,154 124,519 3,154 600
May (night 7,310 57,174 80,128 213,264 58,304 10,312 68,616 144,648 18,616 2,048
June (day) 7,275 55,832 57,280 221,810 91,429 9,959 101,388 120,422 1,388 176
June (night) 7,275 57,209 80,870 208,073 51,877 10,806 62,683 145,390 12,683 4,273
July (day) 7,098 51,383 51,945 211,322 90,829 10,029 90,264 110,464 MINUS 0
July (night) 7,168 58,587 76,456 198,715 45,485 10,983 56,468 142,247 6,468 4,450
August (day) 6,427 48,134 47,816 203,341 91,288 9,641 100,929 102,412 929 0
August (night) 6,498 57,810 70,982 190,310 44,531 10,453 54,985 135,325 4,985 2,896
September (day) 7,027 45,132 44,920 197,867 91,217 9,535 100,752 97,115 752 0
September (night) 7,027 56,221 68,051 185,295 43,613 10,347 53,960 131,335 3,960 2,225
October (day) 6,074 43,825 43,013 193,982 91,253 9,782 101,035 92,948 1,035 71
October (night) 6,251 55,373 65,226 183,212 45,626 10,700 56,327 126,885 6,327 1,130
November 5,827 58,198 72,077 192,323 46,650 9,535 56,185 136,137 6,185 3,920
December 5,721 59,399 71,759 193,771 47,321 9,535 56,856 136,914 6,850 2,931

Canadian Niagara Power (Not Producing) uses 1 cm/s (35 cf/s)

Data Source - International Niagara Committee "Report of Niagara River Diversions - 2002"

At this time the Welland Canal diverts 9,500 cubic feet of water per second from Lake Erie. The New York Barge (Black Rock) Canal diverts 1,100 cubic feet of water per second from the Niagara River.

2003 NIAGARA RIVER WATER AVERAGE DIVERSION 2003
Cubic Feet of Water Per Second (cf/s)
MONTH

CANADIAN POWER

AMERICAN POWER

WATER RESOURCES

       

DeCew
Falls

Sir Adam Beck Group

Robert Moses

Total  Available

Horseshoe
Falls
American
Falls

Total Over Falls

Total Used For Power

Excess
Water
Available

Water Rental
to USA

January 5,791 56,327 61,800 185,329 53,113 8,263 61,376 123,953 11,953

459

February 5,791 57,527 58,551 180,172 49,793 8,475 58,268 121,904 8,263  
March 5,971 60,423 64,414 185,016 44,885 9,288 54,173 130,843 4,174 1,024
April (day) 6,321 44,178 43,931 195,535 91,147 9,923 101,070 94,465 1,070  
April (night) 6,180 55,479 62,012 179.679 45,697 10,276 55,973 123,706 5,973 494
May (day) 6,922 49,687 50,429 208,213 90,334 10,806 101,140 107,073 1,140  
May (night 7,063 59,364 66,709 194,018 49,652 11,195 60,847 133,171 10,847 353
June (day) 6,923 49,581 49,723 207,155 91,111 9,782 100,893 106,262 893  
June (night) 7,133 60,070 69,075 192,322 45,238 10,771 56,009 136,313 6,009 953
July (day) 7,381 49,723 50,288 208,427 90,370 10,630 101,000 107,427 1,000  
July (night) 7,381 59,116 71,759 194,191 44,108 11,795 55,903 138,288 5,903 1,942
August (day) 6,392 52,301 52,513 208,356 86,768 10,347 97,115 111,241 MINUS 35
August (night) 6,992 58,799 72,960 195,820 45,910 11,124 57,034 138,786 7,034 3,319
September (day) 7,169 46,438 47,004 201,751 90,829 10,276 101,105 100,646 1,105  
September (night) 7,098 55,232 66,674 187,414 47,463 10,912 58,375 129,039 8,375 1,130
October (day) 6,886 46,121 46,262 200,232 90,793 10,135 100,928 99,304 928  
October (night) 7,063 58,516 66,215 188,332 45,838 10,665 56,503 131,829 6,503 565
November 6,074 60,423 71,582 196,948 48,946 9,888 58,834 138,114 8,834 2,048
December 6,109 60,105 73,172 199,279 50,041 9,817 59,858 139,421 9,858 2,625

Canadian Niagara Power (Not Producing) uses 1 cm/s (35 cf/s)

Data Source - International Niagara Committee "Report of Niagara River Diversions - 2003"

At this time the Welland Canal diverts 9,500 cubic feet of water per second from Lake Erie. The New York Barge (Black Rock) Canal diverts 1,100 cubic feet of water per second from the Niagara River.

 


LAKE ERIE WEEKLY AVERAGE OUTFLOW DATA
 

DATE (WEEK OF)

RATE OF FLOW
cubic feet per second

LAKE LEVEL

December  4th 2003 210,100  
December 11th 2003 186,500 570.67 feet
December 18th 2003 201,300 570.63 feet
December 26th 2003 204,500 570.70 feet
January 1st 2004 209,100 570.77 feet
January 8th 2004 208,400 570.92 feet
January 15th 2004 200,900 571.03 feet
January 22nd 2004 198,500 570.70 feet
January 29th 2004 202,000 570.50 feet
February 5th 2004 200,200 570.54 feet
February 12th 2004 190,300 570.47 feet
February 19th 2004 187,500 570.38 feet
February 26th 2004 187,900 570.49 feet
March 4th 2004 191,000 570.59 feet
March 11th 2004 203,400 570.80 feet
March 18th 2004 196,300 570.85 feet
March 25th 2004 201,600 570.90 feet
April 1st 2004 202,300 571.31 feet
April 15th 2004 205,700 571.33 feet
April 22nd 2004 211,500 571.39 feet
April 29th 2004 210,500 571.39 feet
May 6th 2004 211,200 571.45 feet
May 13th 2004 210,800 571.57 feet
May 20th 2004 213,300 571.61 feet
May 27th 2004 221,800 572.04 feet
June 3rd 2004 223,900 572.07 feet
June 10th 2004 217,900 572.12 feet
June 17th 2004 211,200 572.28 feet
June 24th 2004 218,600 572.20 feet
July 8th 2004 216,800 571.92 feet
July 15th 2004 222,000 571.95 feet
July 22nd 2004 220,000 571.88 feet
Aug 5th 2004 219,700 572.17 feet
August 12th 2004 216,100 571.82 feet
     
     

Data Source - US Army Corps of Engineers - Buffalo, New York

 


NIAGARA RIVER MONTHLY AVERAGE OUTFLOW DATA - QUEENSTON
 

DATE

RATE OF FLOW
cubic feet per second

September 2000 191,090
October 2000 186,710
November 2000 189,460
December 2000 188,160
January 2001 178,200
February 2001 183,670
March 2001 187,590
April 2001 190,490
May 2001 193,030
June 2001 187,700
July 2001 180,700
August 2001 180,600
September 2001 172,720
October 2001 182,890
November 2001 180,560
December 2001 192,390
January 2002 192,680
February 2002 202,280
March 2002 201,580
April 2002 208,430
May 2002 214,920
June 2002 208,250
July 2002 199,420
August 2002 191,300
September 2002 184,870
October 2002 182,890
November 2002 185,820
December 2002 187,838
January 2003 180,030
February 2003 174,060
March 2003 178,970
April 2003 183,210
May 2003 195,010
June 2003 193,770
July 2003 195,640
August 2003 195,850
September 2003 187,940
October 2003 187,560
November 2003 190,630
December 2003 193,280
January 2004 196,630
February 2004 183,040

Data Source - International Niagara Board of Control - International Joint Commission

 


NIAGARA RIVER YEARLY AVERAGE FLOW
1860 - 2000
 

CUBIC FEET PER SECOND (CF/S)

YEAR MINIMUM MONTHLY FLOW MAXIMUM MONTHLY FLOW AVERAGE FLOW
1860 218,985 252,004 237,172
1861 205,989 252,004 236,924
1862 224,989 255,995 241,160
1863 220,009 239,008 231,875
1864 204,012 239,997 220,265
1865 186,001 224,000 210,580
1866 189,992 226,013 214,005
1867 198,997 236,996 215,665
1868 176,996 230,992 207,825
1869 189,003 230,992 215,312
1870 217,996 239,997 230,003
1871 201,010 230,003 216,583
1872 182,011 204,965 196,006
1873 179,009 227,002 209,732
1874 207,014 230,992 220,503
1875 183,000 215,983 204,682
1876 208,991 255,006 236,924
1877 202,988 224,000 217,360
1878 215,983 236,996 226,401
1879 201,999 217,996 208,496
1880 205,989 223,011 214,076
1881 188,014 226,013 210,262
1882 214,995 243,988 230,815
1883 205,989 243,988 226,436
1884 217,008 245,012 227,990
1885 192,994 242,010 226,083
1886 208,991 239,997 228,334
1887 213,017 242,010 225,836
1888 192,676 220,998 210,721
1889 192,994 217,996 205,671
1890 210,015 240,986 221,068
1891 189,992 208,002 200,339
1892 170,004 224,989 200,586
1893 176,007 224,989 200,762
1894 188,014 218,985 199,986
1895 169,015 186,990 178,832
1896 166,013 195,995 182,152
1897 173,994 211,004 194,582
1898 195,007 214,995 210,151
1899 181,658 208,002 194,900
1900 185,048 205,883 195,642
1901 169,863 189,992 182,823
1902 167,037 210,121 193,452
1903 187,167 217,890 205,459
1904 174,100 230,957 207,775
1905 180,104 222,834 203,411
1906 187,873 209,062 202,316
1907 199,880 226,013 213,793
1908 198,114 230,957 212,557
1909 183,988 220,009 200,656
1910 173,041 209,062 193,412
1911 169,863 194,936 184,306
1912 170,922 208,002 196,984
1913 203,058 239,079 215,912
1914 181,163 216,831 199,103
1915 174,100 199,880 188,085
1916 188,932 222,834 204,082
1917 179,044 234,135 212,098
1918 185,048 206,943 199,809
1919 198,114 229,897 211,569
1920 149,027 204,824 191,687
1921 186,107 215,065 198,961
1922 171,982 210,827 192,923
1923 165,978 194,936 180,351
1924 171,982 200,939 188,826
1925 157,856 180,104 171,028
1926 139,845 197,055 170,851
1927 169,863 203,058 185,577
1928 179,044 209,062 194,724
1929 187,873 247,908 220,574
1930 193,170 234,841 215,736
1931 165,978 185,048 177,243
1932 167,037 193,170 181,092
1933 157,856 193,877 172,581
1934 140,905 158,915 152,134
1935 143,024 168,097 157,008
1936 115,831 175,866 159,550
1937 173,041 206,943 187,272
1938 157,856 197,055 183,670
1939 165,978 199,880 184,412
1940 158,915 199,174 181,763
1941 169,863 185,048 177,208
1942 159,975 199,880 188,367
1943 183,988 238,020 211,004
1944 187,167 221,069 201,080
1945 175,160 220,009 208,143
1946 193,877 216,831 204,153
1947 177,985 224,023 209,309
1948 193,170 232,016 209,697
1949 180,104 204,118 194,053
1950 194,936 218,950 203,799
1951 200,939 232,016 215,383
1952 212,946 251,086 231,415
1953 204,824 224,953 217,113
1954 193,877 228,838 214,888
1955 204,118 236,960 220,468
1956 181,163 222,128 202,528
1957 185,048 212,946 197,690
1958 171,982 188,932 180,739
1959 164,919 197,055 182,339
1960 182,929 212,946 198,644
1961 179,044 224,953 200,233
1962 169,863 193,877 181,092
1963 155,031 185,048 169,615
1964 139,139 182,929 160,822
1965 152,912 182,929 171,204
1966 174,100 197,055 185,330
1967 180,104 205,883 193,841
1968 192,111 214,006 206,236
1969 198,114 236,996 218,808
1970 195,995 218,950 209,132
1971 204,824 226,013 212,240
1972 204,824 236,960 228,237
1973 232,016 263,093 247,024
1974 223,894 264,859 242,151
1975 232,016 245,083 236,995
1976 223,046 257,019 236,183
1977 189,992 227,990 214,182
1978 202,988 236,996 217,325
1979 196,984 233,005 220,998
1980 217,008 242,999 230,850
1981 201,010 229,014 219,585
1982 207,014 237,984 220,927
1983 214,995 239,997 227,672
1984 211,357 233,005 226,330
1985 199,986 261,009 240,173
1986 224,000 268,002 252,002
1987 217,008 252,958 237,172
1988 198,008 220,009 207,684
1989 186,001 224,000 204,753
1990 192,994 220,998 211,004
1991 193,170 226,013 211,110
1992 191,051 228,838 213,123
1993 212,593 243,670 227,036
1994 199,527 231,663 215,171
1995 199,974 219,656 210,085
1996 194,583 226,013 215,887
1997 230,604 260,268 244,658
1998 199,174 251,439 230,886
1999 184,695 207,296 193,735
2000 173,747 210,999 188,493
       

NIAGARA RIVER 140 YEAR AVERAGE FLOW = 207,838 CUBIC FEET PER SECOND
 


Data Source - NOAA - Tim Hunter
 

 

Ontario Power Generation are upgrading their generators at Sir Adam Beck Generating Station #2 that will increase the total generating capacity by approximately 148 megawatts (MW). The New York State Power Authority have upgraded the generators at Robert Moses Generating Station which increased the maximum output of each from 175 megawatts to 200 megawatts. This upgrade has increased the generation capacity from 2,275 MW to 2,600 MW.

To learn more about the history of hydro-electric power generation visit The History of Power

Here are more Educational Web Sites about this subject, please visit:

International Joint Commission

International Niagara Board of Control 

US Army Corps of Engineers - Buffalo

 

 





 

 NIAGARA FALLS THUNDER ALLEY NAVIGATOR


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HISTORICAL ARCHIVE

 


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SITE MAP

 

 

 

The following locations and facts about them are but a few of many famous sites & attractions to be found in Niagara Falls. The best of it is FREE to see...so think of Niagara Falls when planning your next vacation. If you have questions of a current or historical nature about the Niagara Falls area or suggestions feel free to e-mail Rick at

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