Connecting people, science, and nature for a healthy Delaware River and Bay. The Partnership for the Delaware Estuary is a nonprofit organization that brings together people, businesses and governments to restore and protect the Delaware River and Bay. From its headquarters in Wilmington, PDE focuses programs and scientific research on the entire environment affecting the Estuary — from Trenton to Cape May, New Jersey and Lewes, Delaware. We encourage collaboration among the Estuary’s many stakeholders and seek practical solutions to help restore the natural vitality of the Delaware River and Bay on which plants, wildlife, people and businesses rely.