They are doing maintenance work on one of the units. The generators have been on and off as a result. When the generators are off, they've been keeping the sluice wide open - sometimes both gates, sometimes just one. When the generators are on, the sluice is off.
They've been running the generator closest to the bank when they've been running one gen. Honestly I think the tailrace fishes better when the other gen is the one running for some reason.
bd
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