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Lake Superior higher than it was a year ago at this time

Monday, April 02, 2012   by: Staff




Update on Lake Superior outflow
The International Lake Superior Board of Control, under authority granted to it by the  International Joint Commission, has set the Lake Superior outflow to 1,560 cubic meters per second (m3/s) (55.1 thousand cubic feet per second (tcfs)) for the month of April, effective April 3, 2012. 

This is an increase from the March outflow, which was 1,500 m3/s (53.0 tcfs). 

This outflow is as  prescribed by Plan 1977-A.  
The April outflow will be released by discharging about 1,456 m3/s (51.4 tcfs) through the  three hydropower plants and passing most of the remaining flow through the control structure at the  head of the St. Marys rapids. 

The gate setting of the control structure will be maintained at the  existing setting equivalent to one-half gate open (four gates open 20 centimeters (cm), or about eight inches each). 

There will be no change to the setting of Gate No. 1 that supplies the Fishery Remedial Works.  
This past month the water supplies to the lakes Superior and Michigan-Huron basins were above normal. 

Lake Superior is currently 22 cm (nine inches) below chart datum level. 

The level of  Lake Superior is expected to rise in April. 

Currently, the Lake Superior level is about 25 cm (10 inches) below its long-term average beginning-of-April level, and is 12 cm (five inches) higher than the level recorded a year ago. 

This past month the level of Lake Superior rose six cm (two inches), while on average it falls one cm (zero inches) in March. 

The level of Lakes Michigan-Huron rose 10 cm (four inches) this March, while on average it rises four cm (two inches) in March. 

The level of Lakes Michigan-Huron is now about 28 cm (11 inches) below its long-term average beginning-of-April level, and is 20 cm (eight inches) higher than it was a year ago. 

Currently, Lakes Michigan-Huron is four cm (two inches) above its chart datum level. 

The level of Lakes Michigan-Huron is expected to rise in April. 

The board continues to monitor conditions both on Lake Superior and downstream and will advise the International Joint Commission accordingly on those conditions.
BG Margaret Burcham is the United States board member. 

Mr. David Fay is the board member for Canada.
For further information, please contact Melissa Kropfreiter as indicated above.
Additional information can be found on the Internet here or here.


Note: Comments that appear on the site are not the opinion of If you see an abusive post, please click the link beside the post to report it.
mallet 4/2/2012 7:17:51 PM Report

I am not sure, but I have told the Canadian reps on the IJC, that from the look of the rocks showing on the beach in front of my place that there is a distinct possibility that either they are using and "ELASTIC TAPE MEASURE" or that someone is mistaking "INCHES FOR CENTIMETERS". IMHO the lake is down some 23 to 27inches from last year, all I can go by is how big the rocks are that are normally covered with water.
derek 4/3/2012 4:19:42 PM Report

Your dead right.

I have beach this year in Goulais where last year I had how are they measuring...maybe should leave their office!
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