Logging in the wilds of North America has produced some of the strangest steam machines I’ve ever come across. Take, for instance, the alligator boat. This is an alligator boat:

As you can see, it’s basically a low-hulled paddle steamer, a sort of tugboat. Alligator boats were used on rivers, lakes and ponds in Canada for hauling floats of logs, invented by a company called West and Peachey in approximately 1889. Like all side-wheeled paddleboats, they were highly manoeuvrable. In fact, they were even more manoeuvrable than your average paddleboat. For a start, they could do this:
Yes, they could actually travel on land. You see, the boat might be needed on more than one pond, and so to enable them to get from one to another, they were equipped with powerful winches. Anchored to something suitably solid, the boat would use this winch to haul itself across the ground. This, as I’m sure you’ve figured out, is how they came to be known as “alligators.”
The boats were eventually made obsolete by diesel-powered warping tugs, and by the 1940s they were in definite decline. Most were simply beached and left to rot away. Fortunately for historians and fans of strange machinery alike, there is one survivor – the W. D. Stalker in Simcoe, Ontario.
Source:
http://www.norfolkcounty.ca/living/heritage-culture/alligator-tug/







