A hydro-dam is an amazing structure that makes electricity from water!
Firstly you build a dam to block the river. Water then builds up behind the dam. This is called the reservoir.
Water then goes through the intake and rush down the penstock. Then it hits the turbine and spins it very fast.
The electricity has been stored into the generator. Then the electricity travels to houses and cities. After the water has gone through the turbine, it rejoins the river.
Hydro-power is good because it is renewable.
