is often dry. In 2005, heavy runoff filled the reservoir to record levels, swelling the lake to become the second largest by area in the state of Arizona, trailing only Theodore Roosevelt Lake. However, extremely high levels of pesticides, particularly the now-banned DDT, had built up in the farmlands upstream from the reservoir in the decades prior and accumulated in the lake during the flood. The extreme toxicity of the lake rendered it unsuitable for recreational uses and public access to both the lake and the dam was restricted. Similar runoff had filled the lake previously in 1993 and 1980, and in each instance the lake persisted only a few months before emptying due to losses through evaporation, downstream releases, and infiltration. Displacement of Native Americans Water impounded by the Painted Rock Dam caused the flooding of about 10,000 acres of the Tohono O'odham's Gila Bend Reservation. The flooding destroyed a 750-acre tribal farm and several communities. Residents were relocated to a 40-acre parcel called San Lucy Village, Arizona. In 1986, the federal government and the Nation approved a settlement in which the Nation agreed to give up its legal claims in exchange for $30,000,000 and the right to add up to 10,000 acres of newly purchased land to its Reservation. See also Painted Rock Petroglyph Site References External links Gila River Dams in Arizona Reservoirs in Maricopa County, Arizona United States Army Corps of Engineers dams Dams completed in 1960 Reservoirs in Arizona