The Elephant Butte Irrigation District is a 6,870 acres (27.8 km2) historic district in New Mexico and Texas which was listed on the National Register of Historic Places in 1997. The listing included three contributing buildings and 214 contributing structures, in Doña Ana County, New Mexico, Sierra County, New Mexico and El Paso County, Texas.. It preserves portions of the Rio Grande Project, a U.S. Bureau of Reclamation project which distributes water of the upper Rio Grande River.