Although some end user retail customers receive their entire requirement from Hoover, the 15 wholesale power customers blend their entitlement from Hoover power with other resources. Consequently, Hoover is not a sole source supplier. The demand for Hoover power generation is seasonal, with the winter months as the low-demand period. This permits taking out of service one penstock per year for preventative maintenance. Because four generators are normally supplied from each penstock, when the penstock is out of service, so are four generators.
Hoover generation is a direct function of river flow and downstream water demands.
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