In 2011, restoration began on the White Salmon River in Washington state. Part of the process included the disabling of the 100-year-old Condit Dam by setting off explosives within the structure. While the explosions didn’t tear the dam down, they did release the water from its reservoir, unleashing a torrent of water. It ultimately took 2 hours for the reservoir to drain but, thanks to the power of time-lapse photography, you can watch the whole process in just two minutes. 
Further demolition happened in 2012, and the restoration process continues to this day. If you’d like to see more time-lapse footage from how the Condit Dam project has moved forward over the years head over to White Salmon Time-Lapse.