The 1960s and 1970s were a time of rapid suburban growth. City planners in these decades were frustrated with the growing problems of pollution, traffic, and creating new neighborhoods as cities spread. One solution to this idea was the "new town" movement. Designed as planned communities, these "towns" tried to organize the design and growth of the town in advance to better deal with urban sprawl. The community of Jonathan, located within the existing city of Chaska, was built along these concepts.
On the evening of May 2, 1878, the Washburn A Mill exploded in a fireball, hurling debris hundreds of feet into the air. In a matter of seconds, a series of thunderous explosions—heard ten miles away in St. Paul—destroyed what had been Minneapolis' largest industrial building, and the largest mill in the world, along with several adjacent flour mills. It was the worst disaster of its type in the city's history, prompting major safety upgrades in future mill developments.