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Find out how fast it's going to flow

Wednesday, April 02, 2014   by: Staff



The International Lake Superior Board of Control, under authority granted to it by the International Joint Commission, has set the Lake Superior outflow to 2,040 cubic meters per second (m3/s) (72.0 thousand cubic feet per second (tcfs)) for the month of April, effective April 3, 2014.

The outflow is as prescribed by Plan 1977-A and is 60 m3/s (2,120 cfs) more than the March outflow.

The April outflow will be released by discharging approximately 1,942 m3/s (68.6 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 for the month of April will be maintained at the equivalent of one-half gate open (four gates open 20 centimeters (cm) each), effective April 3.

There will be no change to the setting of Gate #1 that supplies the Fishery Remedial Works.

The monthly mean water level of Lake Superior in March was 183.23 m (601.15 ft).

This is 1 cm (0.4 in) above the long-term (1918-2013) March average and the highest March level since 1998.

This past month the water supplies to Lake Superior were above average, while water supplies to Lakes Michigan-Huron were below average.

The level of Lake Superior declined 1 cm (0.4 inches) last month, while on average the lake declines 2 cm (1 in) in March.

The Lake Superior level at the beginning-of- April is 1 cm (0.4 in) above the long-term average, and 33 cm (13 in) above the level recorded a year ago.

It is 3 cm (1 in) above its chart datum level.

The level of Lake Superior is expected to begin its seasonal rise during April.

The level of Lake Michigan-Huron rose 2 cm (1 in) this past month, while on average the lake rises 4 cm (2 in) in March.

The level of Lake Michigan-Huron is approximately 34 cm (13 inches) below its long-term average beginning-of-April level, but is 33 cm (13 inches) higher than it was a year ago.

Lake Michigan-Huron is now 3 cm (1 in) below its chart datum level. The level of Lake Michigan-Huron is expected to continue its seasonal rise in April.

BG Margaret Burcham is the United States Board Member and Mr. Jaymie Gadal is the Board Member for Canada.

Additional information can be found on the Board’s homepage or U.S. Army Corps of Engineers, Detroit District Superior Regulation webpage.


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.
Alystr 4/2/2014 4:55:53 PM Report

I think the people doing these calculations are in denial or just plain stupid.
Brietsy 4/2/2014 5:04:31 PM Report

really? it's been a really wet year this year. Water levels are up. what's wrong with the calculations?
S.M.A.R.T. 4/2/2014 5:18:23 PM Report

Re. Shocking Spanish Video add on Wow! What a way to grab a guy's attention to learn a language. Don't know how many language concepts I'd absorb if she were the teacher. I'm afraid I'd be too busy absorbing the view.
Gater 4/2/2014 5:34:50 PM Report

Wow.. Read the report check out the video. Take 2 extra strength Tylenol and call it a day.
northshoremb 4/2/2014 5:53:38 PM Report

Just like last fall these stats amaze me. Superior is still below there long term water height but just because the others are low they are going to let all our crystal clear water out of superior to raise the other Lakes. Once you let the water out and down the rapids you cant get it back. Plus they keep doing this during the spawning monthes of all the species of fish who spawn in the rapids which takes away there chance at reproduction. If your going to let out water then should have done it in Jan-march when only Lake trout are in there. Any other time there fish spawning and will wash away the eggs and any fry that hatch wont have a chance
SharingNeedles 4/2/2014 6:39:21 PM Report

why does 2cm and 3cm both = 1in ?
but 4cm = 2in !

when .4in = 1cm ?

Sorry...just cant stand lazy math people.
rockbanger 4/2/2014 7:35:58 PM Report

According to Jesse Ventura

Some butt-clowns with money are pulling excessive amounts of water off of Lake Michigan and selling it to China.

Sounds crazy eh!!

Crazy like a fox, particularly if your the butt-clown selling our water. Good business..Pay nothing for the product and sell it at a decent rate.

Gotta Love Jesse.
Moonshiner 4/3/2014 7:13:25 AM Report

its way up...Jessie makes his living educating morons.
Alystr 4/3/2014 11:13:25 PM Report

Not so Britesy, you must be young and clueless. Have you ever been to the locks, the rapids or anywhere near the Superior shorelines? The water is down 3 or 4 feet lol. Wake up and stop listening to the voices in your head.
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.
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