An underground power station is a type of hydroelectric power station constructed by excavating the major components (e.g. machine hall, penstocks, and tailrace) from rock, rather than the more common surface-based construction methods.
Often underground power stations form part of pumped storage hydroelectricity schemes, whose basic function is to level load: they use cheap or surplus off-peak power to pump water from a lower lake to an upper lake, then, during peak periods (when electricity prices are often high), the power station generates power from the water held in the upper lake.
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Famous quotes containing the words underground, power and/or station:
“Political correctness is driving machismo underground and recalling effeminacy from exile.”
—Mason Cooley (b. 1927)
“Through a series of gradual power losses, the modern parent is in danger of losing sight of her own child, as well as her own vision and style. It’s a very big price to pay emotionally. Too bad it’s often accompanied by an equally huge price financially.”
—Sonia Taitz (20th century)
“It was evident that the same foolish respect was not here claimed for mere wealth and station that is in many parts of New England; yet some of them were the “first people,” as they are called, of the various towns through which we passed.”
—Henry David Thoreau (1817–1862)