Water Levels

This is a recent report from John Lavis, a Bayfield Inlet cottager who is one of the BNIA’S two representatives to the Georgian Bay Association, where John is now chair of its Water Levels committee.

After a year on the GBA board, I took over the role of chair of the water committee in 2020, which addresses both water levels and water quality. For the past year, the big issue has been water levels.

As a new islander, I bought in at the lowest of lows (2012) and last summer found myself at the highest of highs. This spring (2021) it felt like someone pulled the plug and — at least for now — water levels are way down (about a foot) compared to last year.

I was keen to understand what the science could tell us about what was causing these dramatic fluctuations and what could be done about it. In October 2020, the GBA hosted a water-levels symposium that brought together leading scientists and key decision-makers from both Canada and the U.S..

I learned four key things:

1. Increases in precipitation have been the prime driver of the high water levels we’ve seen recently.
2. The highs may be higher and the lows lower in future, and we’re likely to cycle between the two extremes more frequently in future.
3. There are only seven control works (dams and diversions) across the entire Great Lakes – St. Lawrence River basin and the ones upstream of us can play only a tiny role in helping manage these extremes.
4. We’d better start planning now for these higher highs and lower lows.

If you want to read more about what we learned from the symposium check out the GBA website.

What can you do about water levels?

• Make sure your septic system is not vulnerable to flooding and/or higher water levels.
• Consider floating docks and replacing unencapsulated blue foam with other more environmentally friendly material.
• Make sure vulnerable shoreline structures are raised or removed where necessary/possible to avoid high water threats.
• Make sure your shoreline is cleaned up, removing dead or dying vegetation so that it is not swept away by flooding and higher water levels.

To see an analysis of current water levels in Lake Michigan-Huron, go to this page and scroll to the bottom.