"Power from tidal flows, waves, and irrigation canals are expanding the definition of hydropower - none of which are likely to get DOE research funding if the hydropower budget gets whacked, some observers say." 09-06
"San Francisco believes it’d be the first project in the United States to test tidal power at a commercial level, adding that it’s confident the system would not impact shipping since it would be far below the surface, probably on the sea floor itself." 9-04