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Diversion and Outlet Works

Diversion tunnel at Split Rock Dam excavated in sedimentary breccia, greywacke and mudstone.

Windamere Dam showing, in left hand photo, intake tower with ports for variable level withdrawal of water from the reservoir. This water passes through the tunnel which was used for river diversion during the construction of the dam and is released into the river downstream of the dam via valves and an outlet channel. Right hand photo shows water being released from the Windamere Dam outlet works into the outlet channel from where it will flow back to the river. The outlet valves themselves cannot be seen as they are located inside a concrete dissipator box designed to dissipate the energy of the high velocity water released from the valves before it enters the outlet channel.

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