Federal authorities began construction activities on a section of border wall in southern Arizona on Aug. 24, deploying armed Customs and Border Protection (CBP) agents to escort contractors onto Tohono O’odham Nation land. The work occurred within the Roosevelt Easement, a narrow federal corridor between the tribe’s reservation and the U.S.-Mexico border.
The Tohono O’odham Nation stated in an Aug. 24 statement that approximately 20 masked CBP agents, including members of the Border Patrol Tactical Unit (BORTAC) and Bureau of Indian Affairs (BIA) officers, entered the reservation at 4 a.m. to provide security for contractors conducting pre-construction activities. The tribe described the entry as a violation of Tohono O’odham Code, Title 4, Chapter 2, which governs civil trespass and exclusion of nonmembers. Officials said contractors used drill trucks for soil sampling at three sites within the easement.
A federal judge had previously denied the tribe’s request for a preliminary injunction on Aug. 14, allowing the project to proceed. The tribe filed a motion in June to block construction, arguing the wall would cause “significant devastation” to sacred sites and alter tribal boundaries. The U.S. District Judge Richard Leon declined to halt the project, according to court records.
Federal Rationale: Security and Smuggling Concerns
CBP Commissioner Rodney Scott stated in an Aug. 25 press release that the 22-mile primary border wall system and 13 miles of detection technology would close a “dangerous smuggling and trafficking corridor” in the desert spanning the Tohono O’odham Nation. Scott described the area as a hotspot for drug loads, migrant deaths, and cartel activity over decades.
The Department of Homeland Security (DHS) awarded $390 million in contracts to SLSCO, a Texas-based construction firm, since 2023 to build the wall segment. Funding was allocated through the One Big Beautiful Bill Act, according to federal records. CBP confirmed the use of a tethered surveillance balloon to monitor the construction zone, while Mexican police were reportedly deployed on the southern side to secure the area during work.
Tribal Response: Legal and Cultural Objections
The Tohono O’odham Nation reiterated its opposition in statements issued on Aug. 24 and 26, calling the federal entry a violation of tribal sovereignty and trespass under tribal law. Tribal officials stated that contractors accessed the easement via the reservation, which they allege constitutes unauthorized entry onto tribal land.
Sen. Ruben Gallego (D-Ariz.) criticized the operation in an Aug. 26 statement, saying “dozens of armed agents” were sent “without so much as a heads up or warning.” The tribe has not responded publicly to requests for further comment beyond its official statements.
Legal and Political Context
The construction is part of a $46 billion Trump administration effort to install 30-foot steel bollard walls, vehicle barriers, and surveillance technology along the U.S.-Mexico border. The project has faced opposition from landowners, environmental groups, and Native American tribes, who argue it violates property rights and desecrates sacred Indigenous sites.
The Tohono O’odham Nation, which has 37,000 members including thousands living in Mexico, filed a lawsuit in June seeking to block the wall. The tribe’s legal challenge centers on claims that the wall would damage sacred mountain peaks and alter the boundaries of their nation. No further court actions have been reported since the judge’s Aug. 14 decision.
Construction Details and Timeline
The current phase involves 22 miles of primary border wall and 13 miles of detection technology, with contractors conducting soil sampling and site preparation in the Roosevelt Easement. The Tohono O’odham Nation has not indicated whether additional legal challenges will be filed in response to the Aug. 24 entry.
Federal officials have not provided a public timeline for completion of the Arizona segment, though the broader border wall initiative remains ongoing.