Access to navigable waterways has always been immensely valuable to humans. It's much easier to trade, travel, and transport.
Have you heard of anyone who has been unable to trade, travel, or transport because he could not use Vinod Khosla's beach as a loading dock, port, and harbor? Waterways have ports which are often publicly-owned or operated for commercial use.
People like it, that's supply and demand in effect.