 The facility was built between 1881 and 1911, and it includes a brick pumping station from 1882, a tall filtration tower, and huge underground infrastructure.The Hackensack Water Company was merged into United Water in the 1980s; the successor today is Suez North America.Van Buskirk Island is a man-made island formed in 1802, and was created by the dams for the mills, The Southern End was known as the old Dock, Upper Landing or Old Landing and was the official head of navigation on the Hackensack River (the highest point of navigable water on the river).