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Great Lakes Article:

Water levels in lakes Superior, Michigan-Huron remain well below average
The Sault Star
09/05/03


The August water supply for Lakes Superior and Michigan-Huron were well below average for the month. Lake Superior is about 28 centimetres below its long-time average beginning-of-September level and about 11 centimetres below the level recorded in 2002.

Lake Superior fell one centimetre in August compared to a normal increase of one centimetre.

The lake is now eight centimetres above its chart datum level.

The level of Lakes Michigan-Huron fell by six centimetres in August. That is three centimetres more than usual.

The level of Lakes Michigan-Huron is about 58 centimetres below its long-term average beginning of September level and is now about 31 centimetres below the level recorded in 2002.

Lakes Michigan-Huron is now one centimetre below its chart datum level, but 23 centimetres above its record low beginning of September level.

The International Lake Superior Board of Control has decreased the lake’s outflow to 2,010 cubic metres per second for September.

That outflow compares to 2,110 cubic metres per second in August.

The outflow will be released by discharging approximately 1,890 cubic metres per second through the three hydropower plants and passing most of the remaining flow through the control structure at the head of the St. Mary’s Rapids.

The gate setting of the control structure will be maintained at the existing setting equivalent to one-half gate open, according to a press release issued by the International Lake Superior Board of Control.

There will be no change to the setting of Gate No. 1 that supplies the fishery remedial works.

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