Jun 24, 2007, Dickerson Maryland. Engineered whitewater kayak course. Appx 600 cubic feet per second (full flow). Cooling water discharge from power plant into Potomac River.
Course map: http://farm5.static.flickr.com/4041/4401760925_2efef04270_o.gif
looks fun there! so the winner was
river3782 4 years ago