1. The Hoover Dam By: Sid and Vic

2. Need for the Hoover Dam The Colorado River was growing out of control Flooding increased rapidly The surrounding states needed water to support people Arizona Wyoming Colorado New Mexico Utah

3. Serving the Public Electricity Supplies 1.3 million people with electricity Water Supplies surrounding states with drinking water Flood Prevention Prevents floods by holding water back

4. Disservice to the Public Releases Methane Still water causes organic matter to die, releasing methane. Riverbed Lowering The pressure of the still water is digging into the riverbed Destroys Natural ecosystems Many animals lose their shelters Water Quality is disturbed

5. Methane Methane is 25 times stronger than CO2 It is released by dead matter Plants die due to no movement

6. Riverbed Lowering The riverbed is lowering due to the water building up In 9 years, the water table sank 4 meters.

7. Water Quality The amount of dissolved oxygen is lowered because the water is still. The temperature is cooler than the normal river.

8. Engineering Challenges.

10. The tunnels diverted the water around the dam while it was being constructed

12. Building Materials Use of quick-dry concrete This called for the concrete to be required to be moved quickly from the production plant to the dam site. If it was not moved quickly enough it would set, and had to be scraped out by hand.

13. “It’s a dam controversy”

14. Name of the dam Originally named “Boulder Dam” At its opening ceremonies, a person called it “Hoover Dam” and the namestuck Changed back to “Boulder Dam” by the Sec. of the Interior Changed back to “Hoover Dam” in 1947 by Congress to honor President Hoover.

15. Conspiracies Hoover Dam is connected to Area 51 via underground tunnels According to some conspiracy theorists, there is much alien activity at the dam, and there is a government complex in it But the best one of all…..

16. Conspiracies there is definitely a government complex in the tunnels of the dam which houses robot alien technology, I’m not sure where this came from definitely not Transformers 2….

17. How can I get there?!?

18. NCSSM >>– Hoover Dam