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Virtual Field Trip (Spring Break 2007). Hydroelectric facility Located on the Colorado River on the Arizona/Nevada Border Construction started in 1931 Dam was completed in 1935 two years ahead of schedule and under budget! http://www.sdsuniverse.info/story.asp?id=3713

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Virtual field trip spring break 2007

Virtual Field Trip(Spring Break 2007)


Hoover dam

Hydroelectric facility

Located on the Colorado River on the Arizona/Nevada Border

Construction started in 1931

Dam was completed in 1935 two years ahead of schedule and under budget!

http://www.sdsuniverse.info/story.asp?id=3713

http://www.usbr.gov/lc/hooverdam/service/index.html

Hoover Dam


Dam data
Dam Data

  • Arch Gravity Dam

  • 726 feet tall

  • 1244 ft long

  • 45 ft wide at the top

  • 660 ft wide at

    the bottom

  • 3.25 million cubic

    yards of Concrete



Power plant facts

The power plant at the base of the Dam has 17 Commercial generating units. (shown on next slide)

Capable of generating 2080 Megawatts

Power plant Facts


Nevada wing with 8 generators
Nevada Wing with 8 Generators generating units. (shown on next slide)


Schematic of the dam
Schematic of the Dam generating units. (shown on next slide)


Virtual field trip spring break 2007


How power is generated

Water passes through screens on the intake towers and flows through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

Water reaches a speed of 85 mph by the time it reaches the generators.

http://en.wikipedia.org/wiki/Hoover_Dam

How power is Generated


Virtual field trip spring break 2007

Water from the Penstock turns a shaft on the generators. through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

Rotors, made up of electromagnets, are connected to the shaft and spin around a coil of copper wire, generating an electric current.


Hoover dam can generate 2080 megawatts
Hoover Dam Can Generate 2080 Megawatts through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)


Transmission lines

Lines Deliver through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

power to NV,

AZ and CA

Transmission Lines


Lake mead

Flooded The Black Canyon of the Colorado River through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

Covers 247 mi 2

Popular recreation spot for boating, fishing and water sports

Flooded many small communities including St. Thomas NV.

White bathtub ring marks the 1983 high water mark result of the 1982-3 El Niño

Lake Mead


Before the dam black canyon
Before the Dam: Black Canyon through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

http://www.library.unlv.edu/early_las_vegas/hoover_dam/short/0015_0020t.jpg


St thomas
St. Thomas through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

  • Founded by Thomas Smith, a Mormon settler in 1865. The town was a farming and business community until 1938 when the area was flooded by Hoover Dam, as Lake Mead filled.

    http://www.nps.gov/archive/lame/stthomas.html


Diverting the river
Diverting the River through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)

http://www.usbr.gov/lc/hooverdam/images/p45-300-02371.jpg


Construction at night july 1934

To learn more about the Construction of Hoover Dam visit this website:

http://www.ecommcode.com/hoover/hooveronline/hoover_dam/const/toc.html

Construction at Night, July 1934


Endangered fish

At least two species of fish have had a major decline since the construction of Hover Dam, the Razorback Sucker (right) and the Bonytail (left)

Endangered Fish


Bonytail

This fish was listed as endangered in 1980. There are no known breeding populations left in the wild. Reintroduction is happening through stocking in the areas shown on the map.

Bonytail


Razorback sucker

This fish is limited to 25% of its original range. Most of the population consists of adults due to low survival rates of young fish. The hump on the fishes back provides stability in turbulent water.

Razorback Sucker


Reasons for decline
Reasons for decline the population consists of adults due to low survival rates of young fish. The hump on the fishes back provides stability in turbulent water.

  • Alteration of the Colorado River system from a turbulent river to a series of calm reservoirs and channelized reaches

  • Nurseries of the fish have been flooded

  • Dams block upstream migration

  • Non-native sport fish

  • Lack of warm seasonal flow, water from the dams is always cold.

  • Other introduced animals, plants, pathogens and contaminants.


Information on endangered fish
Information on Endangered Fish the population consists of adults due to low survival rates of young fish. The hump on the fishes back provides stability in turbulent water.

  • http://mountain-prairie.fws.gov/ea/infopackets/coloradoriver/CRRPfacts.pdf

  • http://mountain-prairie.fws.gov/ea/infopackets/coloradoriver/

  • http://biology.usgs.gov/s+t/imagefiles/r166f03.htm

  • http://biology.usgs.gov/s+t/noframe/r166.htm

  • http://heritage.nv.gov/images/2003/gilele80.jpg


Downstream

Water in the Colorado River is always cold the population consists of adults due to low survival rates of young fish. The hump on the fishes back provides stability in turbulent water.

Flooding no longer scours the banks and exotic species such as tamarisk have become common

Fertile silt in no longer deposited during floods

Downstream