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)
“But the life of Spirit is not the life that shrinks from death and keeps itself untouched by devastation, but rather the life that endures it and maintains itself in it. It wins its truth only when, in utter dismemberment, it finds itself.... Spirit is this power only by looking the negative in the face, and tarrying with it. This tarrying with the negative is the magical power that converts it into being. This power is identical with what we earlier called the Subject.”
—Georg Wilhelm Friedrich Hegel (1770–1831)
“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)