Hoover Dam Final

8/7/2019 Hoover Dam Final

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THE HOOVER DAM

By Group no 5

Aniket Banarjee -05Sachin Desai -15

Sunil Kale -25

Prashant Mali -35

Darshan Pimple -45

Sunil Naryani -55


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HOOVER DAM

Concrete arch-gravity dam in the BlackCanyon of the Colorado River

Constructed between 1931 and 1936during the Great Depression

Impounds Lake Mead and is located nearBoulder City, Nevada

Construction cost $49 million

Major tourist attraction


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BACKGROUND RESOURCES

Improvement in electric power transmissiontechnology

Edison Electric (EE) surveyed had potential ofbuilding a 40-foot (12 m) rock dam which couldgenerate 10,000 horsepower (7,500 kW)

Limit of transmission of electric power was 80 miles(130 km)

Reclamation Service finally rejected the proposal


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PLANNING & DESIGNING

Fall-Davis report & Federal concerns

Interstate compact

Concrete arch-gravity dam

The wedge-shaped dam would be 660 ft (200 m) thick atthe bottom, narrowing to 45 ft (14 m) at the top

Winning bid to build the dam was submitted by aconsortium called Six Companies, Inc.


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DESIGN

Height - 726.4 ft (221.4 m)

Length - 1,244 ft (379 m)

Crest width - 45 ft (14 m)

Base width - 660 ft (200 m)

Volume 3,250,000 cu yd. (2,480,000 m3)

Impounds Colorado River Type of spillway 2 x controlled drum-gate

Spillway capacity 400,000 cu ft/s (11,000 m3/s)


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LABOR FORCE

Company hired large numbers of workers, more

than 3,000 on the payroll by 1932

Employment peaking at 5,251 in July 1934

On August, 1937 first strike took place and secondlabor action took place in July 1935


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RIVER DIVERSION

River needed to be diverted away

Four diversion tunnels - two on the Nevada sideand two on the Arizona side

Tunnels were 56 feet (17 m) in diameter. Their

combined length was nearly 16,000 ft or more

than 3 miles (5 km).


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CONCRETE

The first concrete was poured into the dam on June 6,1933, 18 months ahead of schedule

Used steel buckets 7 feet (2.1 m) high and almost 7 feet

(2.1 m) in diameter

A total of 3,250,000 cubic yards (2,480,000 m3) ofconcrete was used

In addition, 1,110,000 cubic yards (850,000 m3) were usedin the power plant and other works.

More than 582 miles (937 km) of cooling pipes were placedwithin the concrete.


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OPERATION OF THEPLANT


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POWER PLANT AND WATER DEMANDS

Excavation completed in late 1933

Filling of the lake began on February 1, 1935

In the later half of 1936, water levels of Lake Meadwere high enough to permit power generation, and thefirst three generators began operating

By September 1939, the dams power plant hadbecome had become the largest hydroelectricityfacility in the world


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POWER PLANT AND WATER DEMANDS

(CONTINUED)

The final generator came to service only in 1961

The average annual generation ofHoover Dam is 4.2Terawatt-Hour / Year

Water released from the Dam irrigates over 400,000

ha of land


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RO ROADWAY

There are two lanes for automobile traffic across

the top of the dam, which formerly served as

Colorado River crossing

The Hoover Dam Bypass opened on October 19,

2010. With the opening of the bypass, traffic is no

longer allowed over Hoover Dam


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TOURISM

Hoover Dam was opened to the tourists since its

completion in 1937

The has dam remained closed only on a few days

since then and more than a million people visit the

dam every year


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ENVIRONMENTAL IMPACT

For almost six years after the construction ofHoover

Dam, while Lake Mead filled up, virtually no water

reached the mouth of the river

The dam eliminated the natural flooding of River

Colorado, which imperiled many species adapted to

flooding, including plants and animals

Some species of fishes native to the Colorado River

are currently listed as endangered


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Hoover Dam Final

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