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Red Bluff Diversion Dam - This was a seasonal gate-style dam that went down in the summer and came up in the winter. It was used for water diversion and recreation during the summer months. It was raised permentently in the fall of 2012.--Rico (talk) 04:25, 2 April 2014 (UTC)
I'll ask for other opinions, but I wonder if the Red Bluff example fits. As you say, the gate was raised and rendered inoperable as part of a fish passage project. But the structure wasn't removed. --Lockley (talk) 22:54, 8 April 2016 (UTC)