Unless you like an obnoxious amount of hiking (or own a helicopter), skiing is impossible without ski lift. And while these simple yet impressive pieces of engineering seem like a natural part of the mountainside when you visit your favorite slope, building one requires an impressive amount of coordination to lug 8,000-pound columns up to higher altitudes. Here's how they do it. This Photos comes to us from the distant digital past (actually just 2011), but it's a remarkable look into the process behind building a ski lift on Vail Mountain in Colorado. Using helicopters to lug up the huge columns and other equipment, the workers on the ground use what they call "Mark 1 Eyeballs," meaning they don't use radio or other communication equipment—just hand signals and their own two eyes. ***prbxselfnetwork***
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