The dissolved oxygen system is one feature in the environmental mitigation for the Savannah Harbor Expansion Project. The system forces oxygen into river water via two separate plants using proprietary Speece cones to super-oxygenate water taken from the river and re-introduce it back into the river. The system is designed to provide 40,000 pounds of oxygen per day into the estuary to mitigate for the effects on dissolved oxygen from the harbor deepening.