The Army Corps of Engineers built the Mississippi's Lock and Dam No. 2 at this site just upstream of the confluence with the Saint Croix River. It implements a form of "hydrokinetic" power generation. Instead of driving turbines via the hydraulic head of the dam, turbines are simply placed inline with the river current and driven without confining the water.
The BNSF Saint Croix River Lift Bridge is visible to the center right. I only noticed that my aerial photography matched my tourism on the ground after reviewing the pictures at the end of my trip!
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