A failure of the dam holding Situ Gintung, an artificial lake in Tangerang, Indonesia, caused floods that killed at least 100 people.

Situ Gintung is an artificial lake near to the town of Cirendeu in the city of South Tangerang, Indonesia. It was formed by a dam up to 16 m (52 ft) high which was built by Dutch colonial authorities in 1933. The dam failed on 27 March 2009, draining the lake, with resulting floods killing at least 100 people.

A reservoir is an enlarged lake behind a dam, usually built to store fresh water, often doubling for hydroelectric power generation.

Tangerang is the city with the largest population in the province of Banten, Indonesia. Located on the western border of Jakarta and bordered with South Tangerang city, Tangerang is the sixth largest city proper in the nation. Tangerang is home to Soekarno–Hatta International Airport, the primary airport serving the Jakarta metropolitan area.