A ship built to endure tsunami size waves travels on a highway unlike any other in North America; a fleet of machines combats a huge flood in the Arctic Circle; the biggest, most powerful wind turbines in Alaska.

The Yeti, a machine with 588 sharp teeth, helps keep an airport running. Tugboats break the ice in an Alaskan port. Soldiers stationed at the coldest army post in the US.

Alaskan engineers build a massive dam to power an entire town; the world's largest helicopters; Alaska's largest boat lift hauls a 400-ton fishing ship in high winds.