Dams are crucial engineering structures to our modern infrastructure. They allow the steady supply of water, production of power, and the reshaping of agrarian landscapes. The civil engineers that create these massive structures have to engineer fail-safes throughout the designs. One of the fail-safes used in times of high water or excessive flowrates is emergency discharging.
The video below shows arguably the most insanely large emergency dam discharges in the entire world. It will make you appreciate all the engineering that went into allowing these structures to withstand such hydraulic power.