Tidal Electric's offshore tidal lagoons are environmentally benign installations to harvest the energy from the tidal cycle.  The impoundment is a rock wall in a closed shape that is placed offshore with turbines placed on the seaward side.  As the tide cycles, the turbines turn and energy is produced.

Because they are placed offshore tidal lagoons do not impede boat navigation or fish migration, and because they only rise three feet above the high tide line the installation has a very low profile from the perspective of the town.