Reminds me a lot of the Nisqually delta, before they removed the dikes to allow natural flooding. - Jennifer Dittrich

These used to be cranberry bogs, with artificial dikes and gates to control the amount of water around the cranberry bushes. Now it's being restored to a more natural landscape, though the dikes and gates will remain for water control. I think some areas will be flooded, while others won't be. - John (bird whisperer)

Oh, that's pretty similar then (though here it was to control general flooding in the valley, and create some dry farmland). - Jennifer Dittrich

Here it was to allow the cranberries to mature in dry conditions in the summer and then flood the impoundments for the cranberry harvest in the fall. - John (bird whisperer)