What It Takes To Power Michigan’s Famous Mackinac Bridge

This weekend my wife and I are heading to Sault Ste. Marie. And while my wife is not the biggest fan of bridges, I am fascinated and awestruck every time I get to go over the Mackinac Bridge. It truly is a magnificent landmark that spans the Straits of Mackinac. But at more than 26,000 feet long, how do they power the Mighty Mac?

What Keeps The Mighty Mac Running Every Day

Honestly, it’s something most of us probably never even think about while driving across it. You’re focused on the water, the view, the height, maybe gripping the steering wheel a little tighter depending on which lane you’re in. Meanwhile, there’s an entire electrical system quietly keeping this Michigan icon running every single day.

READ MORE: Huge Changes Coming to Mackinac Island in 2026

According to Consumers Energy, they’re responsible for powering the south side of the Mackinac Bridge, including the lighting, traffic systems, weather instrumentation, and electrical equipment that helps keep the bridge operating safely. And with around 20,000 vehicles crossing daily, keeping that power reliable is a huge deal.

Recent Power Upgrades Near Mackinaw City

The bridge itself first opened back in 1957, and now Consumers says crews have been upgrading aging underground power lines feeding the bridge near Mackinaw City. They’ve also been separating power service to Colonial Michilimackinac and the welcome center area so issues in one spot won’t impact the bridge system itself.

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When you really stop and think about it, the numbers behind the Mighty Mac are insane. The bridge stretches 26,372 feet long, the towers rise 552 feet above the water, and each main cable contains more than 12,000 wires. Even crazier? There are roughly 42,000 miles of cable wire inside those cables combined. That’s enough wire to wrap around the Earth more than once.

Why Reliability Matters On The Mackinac Bridge

And somehow, despite brutal winters, high winds, ice, storms, and nonstop traffic, this thing just keeps going.

READ MORE: Soon You Might Not Be Able To Get To Mackinac Island

It’s easy to take the Mackinac Bridge for granted if you live in Michigan. But every time you cross it, you’re driving across one of the greatest engineering achievements in the country, and there’s an entire team behind the scenes making sure the lights stay on and traffic keeps moving safely between the Upper and Lower Peninsulas.