U.S. Customs and Border Protection awarded a $1.7 billion construction contract for “border infrastructure” in the Big Bend sector to Southwest Valley Constructors on May 11. It is the single largest border-related construction contract ever awarded in Texas, and one of the largest publicly recorded construction awards in CBP’s history. What it actually builds is still being negotiated in public.
The award is for a stretch labeled BBT-4 in the agency’s tender documents. CBP has not released the design package, the alignment, or the project schedule.
The Confusion
A week before the contract dropped, CBP Commissioner Rodney Scott told the Washington Examiner the agency would not build a physical wall in Big Bend National Park because of pushback from local residents and the Department of the Interior. Instead, he said, CBP would pave roads along the border and lean on “virtual wall” sensors — radar, fiber, fixed cameras — to alert agents to crossings.
The May 11 award doesn’t directly contradict that. The tender language refers broadly to “linear barrier and access” construction, which can mean steel-bollard fence, “tactical infrastructure” roads, or a hybrid build. CBP’s public Smart Wall map shows planned roads and virtual wall sites in the Big Bend 4 region but the agency hasn’t said which line items the $1.7 billion actually covers.
A separate $4.5 million contract awarded the same week for “resource monitoring support” in Big Bend suggests at least part of the work is sensor-driven rather than masonry.
What’s Public About the Builder
Southwest Valley Constructors is a Kiewit subsidiary. It has held more than $5 billion in border wall contracts across multiple administrations going back to 2019. It built large segments of the steel-bollard fence in Arizona and the San Diego sector, and was the lead contractor on the Yuma sector replacement panels that wrapped in 2024. The firm is not new to Big Bend terrain — it ran access roads through Big Bend Ranch State Park on a smaller 2023 award.
A separate $1.2 billion contract awarded to Fisher Sand & Gravel in March covers a physical fence build through Presidio County and Big Bend Ranch State Park. Those two awards combined put roughly $2.9 billion of federal money into a single Texas sector in less than three months.
The Construction Question
The interesting part for contractors isn’t the political fight. It’s the logistics.
Big Bend is a 254-mile stretch of canyon, basalt, and Chihuahuan Desert with no rail spur and limited highway capacity. The closest concrete plants are in Marathon and Alpine, both more than 50 miles from likely build zones. Steel-bollard wall in the area runs $20 million to $35 million per mile depending on terrain, against published agency averages of $11 million to $20 million per mile on flatter sections. That math is part of why prior administrations skipped this sector.
If the contract is mostly virtual-wall sensors and access roads, the per-mile economics work better. If it’s full bollard wall through canyon country, the cost-per-mile will set a new ceiling.
CBP has 18 months from contract award to break ground under standard federal acquisition timelines. The agency has not released a design schedule, environmental review status, or estimated start date for the BBT-4 work. The Center for Biological Diversity filed suit in April challenging Big Bend wall construction on Endangered Species Act and Wilderness Act grounds; that case is still pending in the Western District of Texas.