Hydroelectric Power

How do Dams Work?

         Dams produce hydroelectricity, and the step to creat that, is very easy.  What you need to build a dam is a river with a large drop in elevation- such as a waterfall.  The dam stores lots of water behind it in it's reservoir- or a lake-type thing as a result of decreased water flow.  Near the bottom of the dam, there is a water intake controler, that only allows certain amounts of water to flow into a tunnel.  In the tunnel, the water flows down a large drop-called a penstock-and gravity causes it to gain speed.  Once the drop ends, the water immediately hits a HUGE turbine, which spins it, which then the turbines' rotation causes a generator to create energy.  There are power lines connected to the generator, which causes electricity to run to other places.  The water then exits the dam, and flows down te rest of the river naturally.  Best part-there are no pollutants in the water!
Picture