This diagram shows the profile of a hydroelectric dam. On the upstream side of the dam is the reservoir. The water enters the dam through the sluice gates in the dam and goes down to the turbines. The bigger the height difference between the intake and the turbines the greater the amount of electricity the water can produce. As the turbine is turned by the water, the energy travels to the generator and then the electrical energy goes to the transformer. Both the generator and transformer are found in the power house. From the transformer the electricity is transmitted through cables to the electrical grid. Once the water has passed through the turbines it then passes out of the dam and continues down the course of the river.