Shoreline Conditions Statement – Lake Superior Flood Watch

Issued April 26, 2021@ 1:00 pm

The Sault Ste. Marie Region Conservation Authority (SSMRCA) is advising that Lake Superior water levels remain above average, the risk of high-water impacts remains in effect.

Last month, Lake Superior declined 2 cm, while on average (1918 - 2020) it declines 1 cm in March. Water levels of Lake Superior appear to be near its seasonal low points and is expected to begin its seasonal rise. However, there will continue to be an increased risk of shoreline erosion, lakeshore flooding and coastal damages over the next several weeks and potentially throughout the spring.

Currently, the Lake Superior water level is approximately 183.42 m IGLD85. This level is 18 cm above the average (1918 - 2020), 18 cm below the level seen during the same time period in 2020 and 20 cm below its record-high level of 1986. For additional reference, the SSMRCA shoreline flooding hazard level used for planning and development review is 184.2 m.

SSMRCA advises all shoreline property owners to prepare for potential coastal impacts such as erosion, lakeshore flooding, crawl space and septic system inundation especially during periods of strong winds and high waves.

SSMRCA staff continue to monitor Lake Superior wind conditions and lake levels closely.

This statement is in effect until (or updated before) May 25, 2021.

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