Border Wall Construction Advances on Tohono O'odham Land Despite Tribe Objections

3 min readSources: Axios

Construction began on a 30-foot border wall segment on the Tohono O'odham reservation in Arizona.

Why it matters: Federal projects on tribal lands raise significant issues around sovereignty, property rights, and environmental law. Legal teams should follow ongoing litigation and regulatory challenges surrounding border infrastructure.

  • Construction started on a 30-foot steel wall segment on the Tohono O'odham Nation reservation in southern Arizona.
  • A federal judge ruled construction is permissible within the federally controlled Roosevelt Reservation along the border.
  • The Tohono O'odham Nation alleges trespass, damage to sacred sites, and has filed lawsuits to stop the project.
  • SLSCO Ltd., a Texas contractor, has received $390 million in federal contracts for border wall projects since 2023.
The Trump administration initiated construction of a 30-foot steel border wall segment on the Tohono O'odham Nation reservation in southern Arizona despite vocal tribal opposition. The Tohono O'odham Nation, comprising about 37,000 members, contends the project infringes on tribal sovereignty and threatens culturally significant sites and sensitive environmental areas. Tribal leaders accuse federal contractors and government agents of trespassing and damaging sacred grounds.

U.S. Customs and Border Protection (CBP) defends the project, classifying the area as a high-risk corridor for drug smuggling and migrant deaths. CBP Commissioner Rodney Scott stated that the construction "will close one of the most dangerous smuggling and trafficking corridors on the Southwest border," emphasizing concerns over cartel activity and border security.

A federal court ruled the construction occurs within the Roosevelt Reservation, a narrow strip of federally owned land established by 19th-century statutes along the border. This ruling authorizes construction to continue despite tribal objections. However, the Tohono O'odham Nation disputes the government's authority over the land, citing sovereign rights and calling for cultural and environmental protections. The Nation has filed multiple lawsuits aiming to halt construction.

The Roosevelt Reservation is a federally controlled zone designed to maintain border security, but it intersects with the Tribe's traditional lands and sacred sites. The dispute has intensified as CBP reportedly restricted access for tribal police to construction areas.

SLSCO Ltd., a Texas-based contractor, has secured over $390 million in federal contracts since 2023 for border wall construction, including work on this segment. Nationwide, the border barrier program's estimated cost is approximately $46 billion, with CBP also implementing technology solutions to address illegal crossings.

This dispute highlights complex legal issues involving federalism, tribal sovereignty, property rights, and environmental statutes. These tensions persist as the federal government advances its border infrastructure amid ongoing resistance from the Tribe and local communities.

By the numbers:

  • 30 feet — height of border wall segment constructed on tribal land
  • $390 million — federal contracts awarded to SLSCO Ltd. since 2023
  • $46 billion — estimated total cost of the U.S. border barrier program

Yes, but: While the federal government cites historic statutes and national security needs to justify construction, the Tohono O'odham Nation's sovereign and cultural claims raise unresolved legal and ethical challenges.

What's next: The Tohono O'odham Nation continues pursuing legal action to block construction and protect sacred sites, with further court proceedings expected.