U.S. Environmental Protection Agency:
“The Hudson River PCB Superfund dredging project has been a success ... This project is the most extensive dredging project undertaken in the nation, and its success is a historic achievement for the recovery of the Hudson River.”

See The Progress

You can view the information within the historic timeline in different ways. By choosing the white button in the bottom left corner that says “3d” you can adjust the timeline into a three dimensional display. By clicking on the white wrench button in the bottom right hand corner of the timeline, you will be able to select from several different options to display the information.