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The lake's water level fluctuates from month to month, with the highest lake levels in October and November. The normal high-water mark is 1.17 feet (0.36 m) above the datum (601.1 ft or 183.2 m). In the summer of 1985, Lake Superior reached its highest recorded level at 2.33 feet (0.71 m) above the datum.
This article lists lakes with a water volume of more than 100 km 3, ranked by volume. The volume of a lake is a difficult quantity to measure. [1] Generally, the volume must be inferred from bathymetric data by integration. Lake volumes can also change dramatically over time and during the year, especially for salt lakes in arid climates.
The Grand Sable Dunes today form a five-mile-long sand slope that rises from Lake Superior at a 35° angle. The summits of the tallest dunes are as high as 275 feet (85 m) above lake level. Glacial melt during the last major advance/retreat called the Marquette Readvance created the conditions for the formation of the Grand Sable Banks.
US and Canadian officials are investigating after a 689-foot ship collided with an underwater object and began taking on water in Lake Superior, the US Coast Guard says.
The water level of Lake Michigan–Huron had remained fairly constant over the 20th century. [36] Recent lake levels include record low levels in 2013 in Lakes Superior, Erie, and Michigan-Huron, [37] followed by record high levels in 2020 [38] in the same lakes. The water level in Lake Ontario has remained relatively constant in the same time ...
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The elevation change from Lake Superior to sea level is 601 feet (183 m). Together with the Saint Lawrence Seaway , the Waterway accommodates both ocean-going vessels and ore, grain, and coal-bearing lake freighters that travel from the system's saltwater outlet to its far interior .
Members of the Local Environmental Action Demanded (LEAD) Agency, an area advocacy group, worry that raising the water level will make flooding worse at the lake's upstream rivers.