Niagara on the Lake Is a Good and Bad Thing, Right?

Gerald: Niagara Falls has a 168 foot free fall, which is bad for cargo. He says it's good for industry because of its hydroelectric power station that was built into the side of the Escarpment. The Great Lakes are great for shipping as they're big freshwater lakes and can last forever. But if you want to go between two different lakes at different elevations, you need some canals in the region by late 1800s.