You're correct.
There's a wormhole pipe under the bridge about where your red line is. I've seen a photo from somewhere. The bridge is not your standard suspended bridge deck. It's fully filled in, except for the large diameter pipe.
There's no gate that I've seen. The gates are at the bridge upstream.
Quote:
Originally Posted by zzptichka
They can feed the turbine from another canal. Not sure if there is a gate under the bridge.

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