The turbine is mounted underwater, on a tethered barge. So, not only is it portable, it requires no dams or other expensive investments, plus there’s very little needed in terms of regulatory processes.
From the company, Hydro Green Power
Hydro kinetic technologies describe the ability to produce zero emission renewable power (energy) from the movement of water. Unlike traditional/ conventional hydropower, which requires an impoundment of water usually created by a large dam, no large infrastructures are required eliminating negative side effects to the environment and marine life.
This is an innovative, inexpensive way to get hydro power in all sorts of new places.