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 swirling concrete vortex at Lake Berryessa, known as the “glory hole”, has come to life once more. For the first time in ...

Workers pour a new concrete spillway on Monday, March 3, 2025, at Potter Lake on the University of Kansas campus. Construction projects were back in full swing on the University of Kansas campus ...

Plane 9 holds 120 million gallons. The size of the void at the top of the spillway is only an estimate, based on bore holes through the concrete that enabled workers to probe beneath it to detect ...

The Altoona Water Authority expects to hear in April whether it will receive a $350,000 Federal Emergency Management Agency grant for a full assessment of the Plane 9 dam — the condition of which came ...

The Department of the Interior’s Bureau of Reclamation has awarded a contract valued at $115 million to Ames Federal to replace a Hyrum Dam spillway in Cache County, Utah. According to an award notice ...