1. By: Michael Brannon and Anthony Nguyen

2. Outline:  Advantages/Disadvantages  How it works  Where to find Hydro power  Production time  Energy Provided  Efficiency  Waste Produced  Cost  The Hoover Dam  Conclusion

3. Advantages:  Creates no pollution  Once dam is built it lasts forever  Very reliable  Can generate constant electricity(unlike solar/wind)  Can also double as a dam to hold back and control water  Costs to build can be split because of electricity production and it will control water  Requires very little maintenance

4. Disadvantages:  Finding a good site to build is difficult  Impacts nearby plants and trees  Also impacts fish and animals (fish ladders are put in place to help fish get back upstream)  Sometimes building a damn will cause water stoppage up stream and flood nearby

5. How it works…  Dam traps water  Water is released and flows through tunnels that power turbines  Turbines drive generators  Energy is then put through power lines, and distributed to us  Produces a lot of energy quickly and cheaply. (Amount of energy depends on size of turbine/plant.)

7. Where to find  Can be found in rivers, streams and lakes, any source of constant flowing water

8. Production Time  Instantly produces energy, as soon as turbines spin Turbine

9. Energy Provided  Provides 7.1% of the USA’s electricity  Provides 20% of the worlds electricity

10. Efficiency  Hydroelectric plants on average are 81% efficient

11. Waste Produced  Produces no waste and no pollution  Although it does impact fish and animals habitat

12. Cost  It cost $165,000,000 to build the Hoover Dam  Hydroelectric costs about.50 cents per kilowatt. (Less than standard power.)  The larger the hydroelectric plant, the cheaper the cost to you  Hydroelectric plants are cheaper to build than nuclear power plants, but it is hard to find a location to build one, so they are less common

13. The Hoover Dam:  The Hoover Dam is the worlds largest dam.  Built in 1936  38 TH largest hydroelectricity plant in the world  Has 17 generators, each makes 133 megawatts, for a total of 2,074 megawatts(230,000 volts)  L.A. gets 15.4229% of the electricity generated at the Hoover Dam  Overall CA gets 28.5393% of the electricity generated at the Hoover Dam

14. Parts of a Hydroelectric Plant: Penstock Turbine Transformer Water Flow Spillway Step up Transformers Transmission Lines Generator Turbine Shaft Penstock Turbine Blades Water Flow Power Goes to You.

16. Conclusion:  Hydroelectricity creates no pollution and is very reliable  Sometimes it is hard to find a good site to build on.  Requires the constant flow of water  Is 81% efficient  Costs about.50 cents per kilowatt  The Hoover Dam is the worlds largest dam, provides 15.4229% of LA’s electricity