1. http://dnrc.mt.gov/wrd/water_proj/hydro/Tostondam.jpg

2.  It is a renewable source of energy  Produces energy through hydroelectric power http://www.tehrantimes.com/News/10506/03_GEORGIA%20HYDRO.jpg

3.  There is minimal pollution  Reduces greenhouse gases  It is renewable and clean  The water used to power the plant is free from nature http://upload.wikimedia.org/wikipedia/commons/f/fd/Haditha_dam.png

4. How it functions http://www.electrical-res.com/EX/10-16-08/hydroelectric_power_plant.gif

5.  The sluice gates measure the flow rate in open channels and regulates the water flow  The penstock is the pipe inside the structure that delivers water to hydraulic turbines  The turbines spin when the water is let through How it functions

6.  The generator turns the water’s kinetic energy into energy we can use  The powerhouse lets the dam be self- sustaining  The transformer takes the energy produced and makes it into useable energy for homes and businesses

7.  There aren’t many big places left to install hydropower plants.  They can install low head hydropower plants almost anywhere. http://www.green-trust.org/hydro.htm

8.  The pond builds up sediment  It keeps the pond from storing water  The sediment has to be dredged to get rid of this problem http://www.gina.gov.gy/dailyphoto/081215/The%20dam%20being%20constructed%20aback%20Buxton,%2 0East%20Coast%20Demerara%20to%20prevent%20water%20entering%20residential%20areas.JPG

9.  50-100 years http://cleantechlawandbusiness.com/cleanbeta/wpcontent/gallery/cache/496__570x420_johnstown-dam-breaks.jpg

10.  The risk of failure: When the Big Bay Dam in Mississippi broke in 2004, it destroyed over 50 homes.  Dams can destroy wildlife habitats, which means that all the species living there are without homes.  Dams can also drain wetlands and cause river pollution by reducing the river flow to such a low level that the river is not able to self- cleanse any longer.

11.  Must have river with place for water to go upstream  Must have room for machinery  Must have resources to build it  If machinery malfunctions the dam is pointless!  Must have way to get electricity to homes  If machine rooms flood an electric SHOCK can occur!!!

12.  Average reconstruction cost: $5 million  Reconstruction is a two-phase process  Secondary spillway built (first phase)  Granite blocks fixed because tree roots ruin them

13.  The U.S. generates only 7-10% of the electrical supply by hydropower http://www.electrical-res.com/EX/10-18-08/hw_power_line.jpg

14.  Water Turbidity  Flooding  Fish migration is disturbed  Insect disease abundance  Habitats destroyed  Uncertainty

15.  High net energy  High efficiency  No CO2 during operations in temperate areas  Can provide flood control below dam  Provides irrigation water

16.  Flooding land  High CO2 emissions from rapid biomass decay in shallow tropical reservoirs  Decreases fish harvest below dam  Decreases flow of natural fertilizer to land below dam http://www.bing.com/images/search?q=flooding+by+dam&FORM=BIF D&adlt=strict#focal=5249bbf4bd6015e1b41e92abc0251da5&furl=http %3A%2F%2Fwww.hazchek.com%2Fimages%2Fflood2.jpg

17.  Dams are very expensive to build and may not provide sufficiently economical electrical power generation, water supply, or irrigation. http://s0.geograph.org.uk/photos/99/98/999804_f781b8af.jpg

18.  It can cause upstream flooding  Lowers levels of water downstream  Countries get into wars or disagreements about this http://i.telegraph.co.uk/telegraph/multimedia/archive/00674/china-dam-flooding_674281c.jpg

19.  Conventional: one-way water flow  Run-of-River: little, or no, stored water. Weather changes cause fluctuations in power output.  Storage: storage to offset seasonal changes…constant supply of electricity. Large dams enough storage for years.  Pumped Storage: reuse water. After it is used it flows into reservoir, then some pumped back up and reused.

20.  http://www.need.org/needpdf/infobook_a ctivities/SecInfo/HydroS.pdf  http://ga.water.usgs.gov/edu/wuhy.html  http://users.owt.com/chubbard/gcdam/ht ml/hydro.html  http://www.naturalstandard.com/index- abstract.asp?create- abstract=/monographs/enviro/generic- dams.asp

21.  http://www.bing.com/images/search?q=flood &form=QBIR&qs=n&sc=8- 5&adlt=strict#focal=afa3056319fee217bd765c4 dff20b141&furl=http%3A%2F%2Fpasc.met.psu.e du%2FPA_Climatologist%2Fextreme%2FFloods% 2Fflood%2520house%2520pic.jpg  http://www.arch.mcgill.ca/prof/sijpkes/arch37 4/winter2001/dbiggs/three.html  http://www.educationcenteronline.org/articles /Engineering-Careers/Problems-and-Benfits-of- Building-a-Dam.html  http://www.arch.mcgill.ca/prof/sijpkes/arch37 4/winter2001/dbiggs/enviro.html

22.  http://www.green-trust.org/hydro.htm  http://www.rainforestinfo.org.au/deep-eco/Dams.html  http://www.internationalrivers.org/en/node/1476  http://www.consumerenergycenter.org/renewables/hy dro/index.html  http://oldwww.wii.gov.in/eianew/eia/dams%20and%20 development/kbase/contrib/soc195.pdf  http://www.wickedlocal.com/medford/features/x19613 6512/State-in-process-of-rebuilding-Mystic-Lakes-dam  http://extension.missouri.edu/publications/DisplayPub.a spx?P=G1548