Don't know if they have property rights or authority, but this is from their website:
"The Rio Grande Project furnishes a full irrigation water supply for about 178,000 acres of land and electric power for communities and industries in the area. Drainage water from project lands provides a supplemental supply for about 18,000 acres in Hudspeth County, Texas. Project lands occupy the river bottom land of the Rio Grande Valley in south-central New Mexico and west Texas.[/b] About 60 percent of the lands receiving water are in New Mexico; 40 percent are in Texas. Water is also provided for diversion to Mexico by the International Boundary and Water Commission-United States Section to irrigate about 25,000 acres in the Juarez Valley.
Physical features of the project include Elephant Butte and Caballo Dams, 6 diversion dams, 139 miles of canals, 457 miles of laterals, 465 miles of drains, and a hydroelectric powerplant. The project is operated as two divisions: The Water and Land Division, and the Power and Storage Division. "
Did someone run you off?