A strange and disturbing phenomena is happening along the magnificent 120-mile Hiawatha Water Trail that follows the southern shoreline of mighty Lake Superior, one of the world's greatest remnants of the last Ice Age: the water level is dropping and its temperature is rapidly heating up, baffling scientists.
http://www.dailygalaxy.com/my_weblog/2007/07/is-climate-chan.html
Lake Superior, the coldest and deepest of the Great Lakes, with an average depth is 483 feet and 1,332 feet at the deepest point, is the biggest freshwater lake on the planet, harboring 20 percent of the world's fresh surface water. But something seems amiss.
http://www.dailygalaxy.com/my_weblog/2007/07/is-climate-chan.html
Water level: depends on precipitation and the season. Typically, the lake is just over a foot (32 cm) higher in September than it is in March (NOAA's Great Lakes Water Level Observations). The annual average is 601.8 ft (183.4 m) above sea level.
http://www.seagrant.umn.edu/superior/facts
1 Typically, the lake is just over a foot (32 cm) higher in September than it is in March (NOAA's Great Lakes Water Level Observations). The annual average is 601.8 ft (183.4 m) above sea level.  Water budget: reflects about a 4-foot (125-cm) exchange of incoming and outgoing water each year.
http://www.seagrant.umn.edu/superior/facts
1 In Lake Superior, seiches take roughly 8 hours to cross the basin and come back again, sometimes changing nearshore water levels by more than 3 ft (91 cm).  Water Temperature: exceptionally cold (average 40 °F (4 °C)) but swimmable in summer when the surface water warms.
http://www.seagrant.umn.edu/superior/facts
Lake Baikal is the largest freshwater lake by volume in the world, containing roughly 20% of the world's unfrozen surface fresh water. With 23,615.39 km3 (5,700 cu mi) of fresh water, it contains more water than all the North American Great Lakes combined. With a maximum depth of 1,642 m (5,387 ft), Baikal is the world's deepest lake. It is considered among the world's clearest lakes and is considered the world's oldest lake — at 25 million years. It is the seventh-largest lake in the world by surface area.
https://en.wikipedia.org/wiki/Lake_Baikal
Currently, the worst Lake Superior offender is the sea lamprey. In vampirish fashion, they attach to large fish and suck their blood and body fluids out. They can consume roughly 40 lbs (18 kg) of fish in 12 to 18 months.
http://www.seagrant.umn.edu/superior/facts
Not only is Lake Superior the largest of the Great Lakes, it also has the largest surface area of any freshwater lake in the world. It contains almost 3,000 cubic miles of water, an amount that could fill all the other Great Lakes plus three additional Lake Eries. With an average depth approaching 500 feet, Superior also is the coldest and deepest (1,332 feet) of the Great Lakes. The lake stretches approximately 350 miles from west to east, and 160 miles north to south, with a shoreline almost 2,800 miles long. The drainage basin, totaling 49,300 square miles, encompasses parts of Michigan, Minnesota, Wisconsin and Ontario. Most of the Superior basin is sparsely populated, and heavily forested, with little agriculture because of a cool climate and poor soils.
http://www.great-lakes.net/lakes/superior.html
It is deep enough to hold all the other Great Lakes together, plus three Lake Eries -in an era of global warming and water shortage crisis throughout much of the planet, Lake Superior could be the U.S. and Canada's equivalent of Saud Arabia's importance to the oil consuming world. But something seems amiss.
http://www.dailygalaxy.com/my_weblog/2007/07/is-climate-chan.html
The bottom of the lake is 1,186.5 m (3,893 ft) below sea level, but below this lies some 7 km (4.3 mi) of sediment, placing the rift floor some 8–11 km (5.0–6.8 mi) below the surface: the deepest continental rift on Earth.
https://en.wikipedia.org/wiki/Lake_Baikal
what is the deepest depth of lake superior
The deepest depth of lake superior is 483 feet. The deepest depth of the lake superior is 483 feet.