East River Power

I like this idea of using rivers as power sources, because it makes perfect sense. The currents of the East River are very, very strong, reaching up to maybe 2.5 knots at low tide. I don' t have my handy tide chart, otherwise I'd know exactly what it is. While rowing during low tide, if you're rowing with the current, you barely have to row at all--the water just moves you along. Rowing against the tide, though, is a struggle.