22 U.S.C. § 277d-4
The United States Commissioner, in order to comply with the provisions of articles 12 and 23 of the treaty of February 3, 1944, between the United States and Mexico, relating to the utilization of the waters of the Colorado and Tijuana Rivers and of the Rio Grande below Fort Quitman, Texas, is authorized to acquire, in the name of the United States, by purchase or by proceedings in eminent domain, the physical properties owned by the Imperial Irrigation District of California, located in the vicinity of Andrade, California, consisting of the Alamo Canal in the United States, the Rockwood Intake, the Hanlon Heading, the quarry, buildings used in connection with such facilities, and appurtenant lands, and to reconstruct, operate and maintain such properties in connection with the administration of said treaty.
22 U.S.C. § 277d-4