The NMDOT is conducting a study on Interstate 25 (I-25) between milepost 139 and milepost 140 at the U.S. Highway (US 380) Interchange, which is approximately ten miles south of Socorro and 0.5 miles west of San Antonio, New Mexico. I-25 is the major north/south interstate system.  Within the study area, I-25 is a rural, divided interstate with two 12-ft lanes in the northbound and southbound directions with 10-ft outside shoulders and 4-ft inside shoulders. US 380 consists of two 12-ft travel lanes with 8-ft wide shoulders as it approaches the nearby community of San Antonio to the east.  The purpose of the Study is to document existing conditions and develop improvement alternatives for the study area.

The land surrounding the San Antonio interchange is primarily undeveloped and rural with little to no development directly adjacent to the interstate.  Businesses and homes can be found half a mile to the east in the community of San Antonio. The San Antonio Fire District is located directly east of the interchange on the south side of US 380. Cattle grazing and agriculture are the primary land uses in the vicinity of the study area.  Approximately 3.3 miles to the south, the Bosque del Apache National Wildlife Refuge is located between the Chupadera Mountains and the San Pascual Mountains and encompasses more than 57,000 acres. Approximately 21.3 miles away to the north, the Sevilleta National Wildlife Refuge is a 230,000-acre wildlife refuge bisected by the Rio Grande. National wildlife refuges allow recreation users a place to camp, hike, hunt, picnic and watch wildlife. Approximately 7.8 miles to the east, the White Sands Missile Range stretches along US 380 south and encompasses more than two million acres. The WSMR occurs to the east of the Rio Grande and is managed by the US Army.