from Image, Autumn 1964; Manitoba Hydro
Cross Section of the Pinawa Generating Station
(From left to right)
The slanting part left of the dam is the metal support and the trash screen that
kept debris from being sucked into the penstock. On top of the dam are winches for
raising and lowering the gates which could stop water getting into the penstocks
(for maintenance). The gates (dark colour) are in the down position. When the
gates were down, and the penstocks empty of water the gates could not be moved
because of the water pressure. Water was introduced into the penstocks through
horizontal filling pipes, the air inlet pipe was a vent to allow the air to
escape. The handwheels were used to open and close the valves on the filling
pipes. The penstocks were huge (14' diameter) steel sausage-shaped sections
that held the Francis Turbines and the shaft connecting them to the Generators.
The Francis Turbines (called runners) turned on horizontal axes, and expelled
water out the bottom into the tailrace
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