Superior is the largest of the 5 Great Lakes fed by diversions
through Long Lake in Long Lac, Ontario and Lake Nipigon in Ogoki,
Ontario. An average of 5.300 cubic feet of water per second enters her
Northern shoreline through these 2 diversions. Both diversions have been in operation since the
early 1940's with water coming from the Hudson Bay watershed. The
outflow of this water is controlled by a 16 gate control structure, 5
navigation locks, 3 hydropower plants and the St. Mary's Rapids in
Sault Ste. Marie, Ontario and Michigan. Lake Superior has an average
outflow of 76,000 cubic feet per second.
601 ft. above sea
level Maximum Depth:
350 miles Max.
Width: 160 miles
Volume: 2,935 cubic miles