New Jersey Meadowlands, also known as the Hackensack Meadowlands after the primary river flowing through it, is a general name for the large ecosystem of wetlands in northeastern New Jersey in the United States. Originally the area was forested with Atlantic White Cedar before the early Dutch settlers cleared the cedar forests and used dikes to drain the land. The Dutch farmers used the drained tidal lands to create "meadows" of salt hay; hence the area was referred to by locals as the Meadows. In more recent times the Meadowlands became known for being the site of large landfills and decades of environmental abuse. The Meadowlands stretch mainly along the terminus of the Hackensack and Passaic Rivers as they flow into Newark Bay; tributaries of the Hackensack include Sawmill Creek, Berrys Creek, and Overpeck Creek. The Meadowlands consist of roughly 8,400 acres (34 km²) of open, undeveloped space in addition to developed areas that previously were part of the natural wetlands which were heavily developed by H. Bert Mack in the 1960s. The area includes portions of Kearny, Jersey City, North Arlington, Secaucus, Lyndhurst, Rutherford, East Rutherford, Carlstadt, North Bergen, Moonachie, Ridgefield, Ridgefield Park, and Little Ferry.