Katy and the Big Snow (Hardcover, New edition)

Katy, a red crawler tractor, can do a lot of things. In the summer she is a bulldozer, in the winter, she turns into a snowplough, waiting and waiting for her chance to be useful. Most of the winters, though, the snowfalls are mild and the town doesn't need Katy. But when the big one finally hits, the entire community is dependent on one little snowplough.