First Big Underwater Blast was at site of the powerhouse at The Dalles Dam. The blast didn't take place until 6:10 p.m. (ST) on March 31, more than two hours after the scheduled time with darkness rapidly coming on, and the photographer had to overdevelop the film to get this picture.
Water came over the spillway of The Dalles Dam soon after creation of Lake Celilo before the full complement of turbines and power generators were installed.
