the quadrangles of Lansdowne and Norristown. There are 31 municipalities in the watershed, of which 26 are in Delaware County. A large part of the watershed of Darby Creek is on developed land, and many suburbs of Philadelphia are in the watershed. The majority (61%) of the land use is considered residential, while 11% is undeveloped and 10% is open space. Of the remaining land, most of it is considered industrial, commercial, and institutional, with 2.45% classified as paved. Estimates for the population of the watershed range from 484,000 to 500,000. In general, the topography of the watershed consists of rolling land that is densely settled. A large undeveloped tract of land owned by the Delaware County Industrial Development Authority is located at the mouth of the creek. The developed nature of the watershed of Darby Creek has caused it to be prone to storm surges during rains. Substantial amounts of nonpoint source pollution flows into the creek during storm events. Additionally, much of the older development in the watershed was built before current environmental regulations were enacted. In 2012, an article in The Philadelphia Inquirer stated that Darby Creek "is one of the country's most flood-prone streams, a significant drain on the National Flood Insurance Program, and a national lesson in what can go wrong along a developed waterway." A Superfund site known as the Lower Darby Creek Area site is located in the vicinity of the creek. This site consists of two landfills. Major roads in the watershed include Interstate 95 and Interstate 476. History and name Darby Creek was entered into the Geographic Names Information System on August 2, 1979. Its identifier in the Geographic Names Information System is 1172928. According to the Geographic Names Information System, variant names include Church Creek and Derby River. Before 1900 The Lenni Lenape tribe was the first Native American tribe to inhabit the area in the vicinity of Darby Creek. They fished, hunted, and used the creek for transportation via canoe. At the time, the area was forested, so they burned clearings in the forest in order to farm and for security purposes. The Lenape named the creek "Muckruton", which appeared on several early maps. The first Europeans to come to the area in the vicinity of Darby Creek were the Dutch, though they did not establish any permanent settlements. In 1643, Swedish colonists led by Johan Printz established New