On October 26th 2011, a hole was blasted in the base of 125′ tall Condit Dam on the White Salmon River in Washington. In less than 2 hours, the reservoir behind the dam drained completely and the White Salmon flowed unimpeded by a dam for the first time in 100 years.
Condit Dam Removal
Good news for salmons and steelhead, able again to spawn in the river.
…For 98 years, the 125-foot high Condit Dam in southeastern Washington State held back the White Salmon River, creating a serene lake, but choking off the waterway to salmon. Wednesday, in an historic effort, the dam was dramatically breached, and ecologists hope the increased flow of water will restore the waterway to fish and other aquatic organisms, as well as the birds and mammals that rely on them…[Read more on the National Geographic News site here]
Restoration of the White Salmon River
…The video begins by showing a black dog wandering down to the shore for a drink, and then beating a fast retreat at the exact time of the explosion. He may have even felt the shock wave of the explosion in his tongue, although nothing was visible to those of us along the lake. The dog wore a surprisingly guilty expression during the remainder of the day, as he had wrongly assumed responsibility for a catastrophe.
The rest of the video speaks for itself. The first several minutes of the flush were characterized by the movement of relatively clean reservoir water through the drain tunnel…. [read more on]
Condit Dam Removal video is a combination of video and timelapse photography captured throughout the day. The technical stuff:
Video was shot with a Sony FS100, a Sony EX1 recording to a KiPro HDD recorder, and a Canon 5D.
The timelapse photography was done with 2 Canon Rebel T2is and a Canon 7D. Additional cameras used include GoPro Hero 2s, GoPro HD Heros and a Canon 1D Mark 4.