Lower Monumental Power Plant

Lower Monumental Power Plant
	location
Coordinates	46 ° 33 '45 " N , 118 ° 32' 17" W Coordinates: 46 ° 33 '45 " N , 118 ° 32' 17" W.
country	United States
place	Walla Walla County , Washington
Waters	Snake River
	f1
	power plant
operator	USACE
construction time	1961 to 1969
Start of operation	1969
	technology
Bottleneck performance	810 megawatts
Standard work capacity	3,380 million kWh / year
Turbines	Kaplan turbines 6 × 135 MW
	Others

The Lower Monumental power plant ( English Lower Monumental Lock and Dam ) is a run-of-river power plant in Washington State , USA . It is the 16th power plant in the chain of 17 hydroelectric plants on the Snake River , a left tributary of the Columbia River . The Snake River forms the border between Franklin and Walla Walla Counties at this point .

Construction work began in June 1961. The power plant went into operation in 1969. It was built by the United States Army Corps of Engineers (USACE) and is also operated by the USACE. In addition to generating electricity, it is also used for irrigation. The basis for the construction of the power station was the River and Harbor Act of 1945.

Barrier structure

The barrier structure is a concrete gravity dam approximately 30 m (100 ft) high with earth embankments on either side. It consists of a machine house on the right side of the river, a weir system with eight weir fields in the middle, and a lock on the left side. The top of the wall is at a height of 168  m above sea level. d. M. (553 ft). The total length including the dams is 1,155 m (3,791 ft). Of this, 200 m (656 ft) are accounted for by the engine house, 152 m (498 ft) for the weir system and 57 m (186 ft) for the lock. The weir system has a maximum capacity of 24,000 m³ / s (850,000 ft³ / s).

Reservoir

With the normal storage target of 164.6 m (540 ft), the Herbert G. West reservoir extends over an area of around 26.7 km² (6,590  acres ). The minimum congestion target is 163.6 m above sea level. d. M. (537 ft), the maximum at 167 m above sea level. d. M. (548.3 ft).

power plant

The Lower Monumental power plant has an installed capacity of 810  MW . In 2011 this generated 3.38 billion kWh. The first three machines were put into operation in 1969. Three more machines were installed from 1975 to 1981. The six Kaplan turbines each have a maximum output of 135 MW and the associated generators 142  MVA . The nominal speed of the turbines is 90 / min. The maximum flow is 3700 m³ / s (130,000 ft³ / s).

The electricity generated is marketed by the Bonneville Power Administration (BPA). The BPA uses the four lowest power plants on the Snake River as peak load power plants , in particular to compensate for the fluctuating electricity generation from wind farms.

lock

On the left side of the dam is a lock with a length of 198 m (650 ft) and a width of 26 m (86 ft).

Others

There are two fish ladders.

Web links

Commons : Kraftwerk Lower Monumental - Collection of images, videos and audio files

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Lower Monumental Lock and Dam. USACE , accessed October 20, 2015 .
^ ^A ^b Lower Monumental Dam and Lake Herbert G. West. USACE, accessed October 20, 2015 .
^ Power benefits of the lower Snake River dams. (PDF 584 KB) Bonneville Power Administration (BPA), January 2009, accessed on October 20, 2015 .

[us-1] ↑ ^a ^b ^c ^d ^e ^f Lower Monumental Lock and Dam. USACE , accessed October 20, 2015 .

[nw-2] A ^b Lower Monumental Dam and Lake Herbert G. West. USACE, accessed October 20, 2015 .

[bpa-3] Power benefits of the lower Snake River dams. (PDF 584 KB) Bonneville Power Administration (BPA), January 2009, accessed on October 20, 2015 .