Historical Marker
Rio Felix Bridge
Completed in 1926, the Rio Felix Bridge was one of the most important structures in New Mexico’s highway system. The bridge was placed across the river at nearly a 45-degree angle to increase stability during floods. Constructed with three, 144-foot Pratt Truss spans, it is the longest bridge of its type in New Mexico. Bypassed in 1984, the bridge is listed in the National Register of Historic Places for its design, enhancing local farming and tourism at Carlsbad Caverns.
During World War II, New Mexico was the site of several top-secret military installations, including the Los Alamos National Laboratory, where the atomic bomb was developed. The laboratory is still one of the largest employers in the state and conducts research in fields such as nuclear energy and national security.