In this experiment we are going to try to see what level of slope can produce the most amount of electricity in a mini hydroelectric plant. We got this idea from looking at websites on the internet and other information we got from a trip to Hoover Dam in the United States a couple years ago. To test our idea, we will design a mini hydroelectric plant in which we will adjust the slope (Penstock) that the water runs down. When the water flows down the penstock it spins a propeller (Turbine) which will then spin an electric motor (Generator). The generator will be hooked up to an ohms-meter where we will be able to measure the amount of electricity produced. In our results we found out that the 50 degree slope made the most energy producing an average of 4.07 volts. The 60 degree slope came second creating 3.92 volts on average and in third place was the 40 degree slope creating 3.87 volts. From this we concluded that the 50 degree slope produced the most energy.