It's Surprisingly Easy to Turn Off Niagara Falls

Illustration for article titled Its Surprisingly Easy to Turn Off Niagara Falls

New York State Parks is holding a hearing this week about what might seem like a controversial topic: Whether or not to turn off Niagara Falls. This is a process called dewatering, and yes, it’s happened before.

The falls—at least part of them—would need to be dewatered to allow for the reconstruction of several historic bridges in Niagara Falls State Park, some of which were built as early as 1901.

If it happens, this won’t be the first time Niagara’s gone dry. In 1969, the American side of the falls (called American Falls) were dewatered. The water was simply diverted using what’s called a cofferdam, so it fell over the bigger, more famous Horseshoe Falls instead. The 600-foot cofferdam was created by dumping 27,800 tons of rock and dirt until the flow was stopped completely.

Illustration for article titled Its Surprisingly Easy to Turn Off Niagara Falls

The Army Corps of Engineers studied the dry falls for five months, which ended up becoming a tourist attraction in themselves. The plan was to pick up the trash (including some bodies), study how erosion might be affecting flow, and decide if an intervention might improve the falls, structurally and aesthetically. In the end though, engineers realized they could not improve upon Mother Nature.

[NY State Parks via Discovery]

Photos from Russ Glasson’s Flickr stream

Follow the author at @awalkerinLA

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I love how you call yours Niagara Falls and ours (Canadian’s) Horseshoe Falls.... In Canada its called Niagara Falls and the “American One” isn’t referred to in any conversation or literature usually. We generally have to go out of our way to inform people there are two falls, “Niagara Falls, and that other one on the American Side” is usually how the conversation goes.