On the morning of May 21, 2006, in a scheduled controlled demolition, the cooling tower used to cool water from the former Trojan Nuclear power plant near Rainier, Oregon, was imploded. The tower was one of the largest of its type reaching 499 feet high (kept under 500 feet to avoid issues with the Federal Aviation Administration) (FAA).
This was a natural draft cooling tower. Hot water was sprayed inside and up drafts from the vents at the base would draw the heat up, and most of the water condensed back to the bottom but some came out the top as a 'steam cloud' when the plant was in operation. The plant was closed in the early 1990's and is in the process of being dismantled.
A special thanks to Martha Dibblee for taking those photos and making them available.