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Visited with One Flew East... To the ladder, anyway 
OFE tipped me off about this one, so we headed on down to Bewl reservoir in search of some overflow tunnels...
The tunnel itself isn't very long, but long enough. It starts off as an open culvert, with water rushing out of a pipe further down stream.
The tunnel starts off with a bend, and works it's way underneath the Dam and under the water. Where it ends with a vertical shaft up the vortex.
The tower on the right is the overflow:
.
OFE tipped me off about this one, so we headed on down to Bewl reservoir in search of some overflow tunnels...
The tunnel itself isn't very long, but long enough. It starts off as an open culvert, with water rushing out of a pipe further down stream.
The tunnel starts off with a bend, and works it's way underneath the Dam and under the water. Where it ends with a vertical shaft up the vortex.
The tower on the right is the overflow:
.
