Senator Tommy Tuberville has proposed expanding the U.S. Navy’s Columbia-class submarine program from 12 to 16 vessels, marking a significant potential increase to America’s nuclear deterrent capability amid rising global tensions.
The Alabama Republican floated the expansion during recent defense discussions, according to sources familiar with the matter. The Columbia-class submarines are designed to replace the aging Ohio-class ballistic missile submarines that form the sea-based leg of the U.S. nuclear triad.
The current Columbia-class program, already the Navy’s most expensive shipbuilding effort, carries an estimated cost of $128 billion for 12 submarines. Each vessel costs approximately $7.2 billion, making any expansion a substantial financial commitment that would require congressional approval.
Defense analysts note that Tuberville’s proposal comes as the Pentagon faces increasing pressure to modernize nuclear forces while addressing threats from China and Russia. “The strategic environment has fundamentally shifted since the Columbia-class requirements were established,” said one defense official who requested anonymity.
The Columbia-class submarines will carry Trident II ballistic missiles and are scheduled to begin replacing Ohio-class boats in the early 2030s. The lead vessel, USS Columbia, is currently under construction at General Dynamics Electric Boat.
However, expanding the program would face significant hurdles, including shipyard capacity constraints and budget limitations. The Navy is already struggling to meet delivery timelines for the existing 12-submarine order.
If approved, the expanded fleet would represent the largest U.S. submarine construction program since the Cold War, potentially reshaping America’s strategic nuclear posture for decades to come.