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 ...

The Morning Glory Spillway, also known locally as the "Glory Hole," is a 72-foot-diameter concrete funnel built into the lake that drops 200 feet into a narrow shaft. When the lake is full ...

HARRISBURG, S.D. (KELO) — The spillway replacement project at the Lake Alvin Recreation Area south of Sioux Falls is nearing its completion. It’s a case of out with the old, in with the new at ...