While most dams rely on spillways shaped like chutes or shafts to drain the overage, the dam at Lake Berryessa uses a funnel-like spillway due to lack of space, per local news outlet The Press ...

More than a mile long, the Grand Coulee Dam is the largest concrete structure in the U.S. In the fall of 2011, dam operators agreed to open the spillway just for American Experience. "It was very ...