Wave or tidal generators instead of dams.
these could be plants you plug in the sea much like the wind farms, but depend upon the water flow but don't dam up the water behind them. They will also not restrict ships from going up and down rivers (when they fix that).
these could be plants you plug in the sea much like the wind farms, but depend upon the water flow but don't dam up the water behind them. They will also not restrict ships from going up and down rivers (when they fix that).