Intermountain Power Plant
|Intermountain Power Plant|
Intermountain Power Plant
|Construction began||September 1981|
|Commission date||June 1986|
|Construction cost||US$4.5 billion|
|Owner(s)||Intermountain Power Agency|
|Operator(s)||Los Angeles Department of Water and Power|
|Thermal power station|
|Units operational||2 X 950 MW|
|Make and model||GE
Babcock & Wilcox
Intermountain Power Plant is a large coal-fired power plant at Delta, Utah, USA. It has an installed capacity of 1,900 MW, is owned by the Intermountain Power Agency, and is operated by the Los Angeles Department of Water and Power.
The power plant consists of two units each with a generation capacity of 950 MW. Generating units are equipped with General Electric tandem compound steam turbines and Babcock & Wilcox subcritical boilers. The boiler houses of Intermountain Power Plant are 91.75 metres (301.0 ft) and the flue gas stack is 213.67 metres (701.0 ft) tall. The HVDC Intermountain transmission line runs between Intermountain Power Plant and Adelanto, California.
Construction on the plant began in September 1981. Commercial operation of unit 1 started in June 1986, and unit 2 in May 1987. The project cost US$4.5 billion. When built, it was the largest coal-fired power project in the United States. In 2004, units 1 and 2 were uprated. These works were conducted by GE and Alstom. The plant was originally designed for four units; however, only two units were built. The Intermountain Power Agency planned to build the third unit of 900 MW capacity. This unit was expected to go online in 2012; however, the project was cancelled after its major purchaser, the city of Los Angeles, decided to become "coal free" by 2020.
On December 28, 2011, one of the generators failed causing the shut-down of one unit for several months.
The power plant is one of the largest emitters of nitrogen oxide, a pollutant that contributes to haze, in the Western United States. Some[who?] have criticized the power plant for selling over 80% of its output to California while the pollution from the power plant largely affects Utah.
Conversion to natural gas
The plant is scheduled to be converted to natural gas by 2025 at a cost of $500 million.
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