Recent debate over the Strait of Hormuz has drawn attention to a surprising chapter of American history: in the 1960s, the U.S. government seriously studied using nuclear explosives to carve new canals through Central America.
The idea emerged from Project Plowshare, a Cold War-era program that sought peaceful applications for atomic energy. After the Suez Crisis, the Eisenhower administration promoted “atoms for peace,” positioning nuclear technology as a tool for large-scale infrastructure rather than solely as a weapon.
Project Chariot and the Alaskan Harbor
One of the earliest proposals, known as Project Chariot, called for detonating five thermonuclear bombs in coastal northwestern Alaska to create an instant harbor. The plan, championed by physicist Edward Teller and the Livermore National Laboratory, generated intense debate and prompted one of the first environmental studies of Arctic food webs.
The Panatomic Canal: 294 Nuclear Bombs Across Panama and Colombia
More ambitious still was the vision of a nuclear-excavated sea-level canal in Central America. With the Panama Canal aging and its narrow locks struggling to accommodate modern ships, officials saw a wider, deeper channel as the solution.
The concept gained urgency after violent anti-American protests erupted in Panama in January 1964. President Lyndon B. Johnson agreed to negotiate new terms and appointed the Atlantic-Pacific Interoceanic Canal Study Commission to find the best location for a nuclear canal.
Funded with a $17.5 million congressional appropriation — roughly $185 million today — the commission evaluated routes through eastern Panama and western Colombia. The Panamanian option spanned the forested Darién isthmus and would have required 294 nuclear explosives across 14 detonations, releasing the equivalent of 166.4 million tons of TNT.
To put that in perspective, the most powerful nuclear weapon ever tested — the Soviet “Tsar Bomba” in 1961 — released roughly 50 million tons of TNT worth of energy. The Panatomic Canal would have required more than three times that force.
Planners estimated that 30,000 people, roughly half of them Indigenous, would need to be evacuated and resettled to avoid radiation exposure and ground shock. The commission considered this a “formidable but not impossible” obstacle, writing that public acceptance “probably could be solved through diplomacy, public education, and compensating payments.”
Why the Project Was Abandoned
As scientists dug deeper — literally and figuratively — the problems mounted. Marine biologists warned that connecting the Atlantic and Pacific for the first time in 3 million years could unleash mutual invasions of species between the two oceans, fundamentally disrupting marine ecosystems.
The project was ultimately shelved by the early 1970s for several reasons: the Limited Nuclear Test Ban Treaty of 1963 made peaceful nuclear detonations legally complicated, and the Vietnam War drained federal budgets that might have funded the project.
Geological surveys also revealed that wet clay shale along the Darién route would likely have made nuclear excavation ineffective, even if the political and environmental obstacles had been cleared.
Lessons for Today
Despite the project’s cancellation, supporters like Edward Teller never abandoned their vision. In his final years, Teller still argued in the 2000 documentary “Nuclear Dynamite” that atomic excavation would someday become commonplace.
Today, the idea of building infrastructure with nuclear explosions seems far-fetched given widespread understanding of radioactive fallout’s health and environmental consequences. But the Panatomic Canal story serves as a reminder that even radical proposals can appear inevitable within their cultural and political moment.
As societies navigate disruptive technologies today — from generative AI to cryptocurrency — the question remains relevant: which innovations championed by powerful voices now will our descendants view as sensible, reckless, or somewhere in between?