Amistad Reservoir (Spanish: Presa Amistad) is a reservoir on the Rio Grande at its confluence with the Devils River 12 miles (19 km) northwest of Del Rio, Texas, United States. The lake is bounded by Val Verde County on the Texas side of the international border, and the state of Coahuila on the Mexican side of the border. The reservoir was formed in November, 1969 by the construction of Amistad Dam to provide flood control, water conservation, irrigation, hydroelectric power, and recreation to the area. The dam and lake are managed jointly by the governments of the United States and Mexico through the International Boundary and Water Commission, which was established in 1889 to maintain the border, allocate river waters between the two nations, and provide for flood control and water sanitation. The name of the dam and lake is the Spanish word for "friendship".