Huntington Ingalls to support construction of first two Columbia-class ballistic missile submarines.

According to a press release published on November 23, 2020, Huntington Ingalls Industries announced on November 23, 2020, that its Newport News Shipbuilding division has been awarded a contract modification from General Dynamics Electric Boat in support of construction on the first two Columbia-class ballistic missile submarines.
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Technical drawing of future US navy Columbia-class submarine. (Picture source GAO)

The contract modification, valued at approximately $2.2 billion, provides continued design support efforts, as well as the construction and delivery of six module sections for each of the first two Columbia-class submarines.

As part of the contract, Newport News will deliver the completed modules to Electric Boat for final assembly. The contracted module delivery dates are scheduled to start in November 2022 with the last module delivery taking place by January 2028.

“We are pleased to be a crucial design and manufacturing contributor to the Columbia-class program,” said Charles Southall, Newport News’ vice president of Columbia-class Submarine Construction. “This contract continues NNS’ longstanding and strong commitment to the Navy’s undersea enterprise through the design and construction of major modules and assemblies necessary to achieve program objectives.”

Newport News is a major contractor and shipbuilding partner in the Columbia-class program, and in May 2019 began advance construction activities on the lead ballistic missile submarine under contract to Electric Boat.

The Columbia class will replace the fleet of Ohio-class ballistic missile submarines. The lead ship is scheduled to be delivered to the Navy in 2027.

The U.S. Navy’s FY2021 budget submission estimates the procurement cost of the first Columbia-class submarine at $14,393.4 million (i.e., about $14.4 billion) in then-year dollars, including $6,007.8 million (i.e., about $6.0 billion) in costs for plans, meaning (essentially) the detail design/nonrecurring engineering (DD/NRE) costs for the Columbia class submarine. The U.S. Navy wants to procure the second Columbia-class boat in FY2024.

The Columbia-class design includes 16 SLBM tubes, as opposed to 24 SLBM (Submarine-Launched Ballistic Missile) tubes (of which 20 are now used for SLBMs) on Ohio-class SSBNs. Although the Columbia-class design has fewer SLBM tubes than the Ohio-class design, it is larger than the Ohio-class design in terms of submerged displacement. The Columbia-class design, like the Ohio-class design before it, will be the largest submarine ever built by the United States.

British Navy has also planned to acquire Columbia-class submarine under the name of Dreadnought-class SSBN. This submarine will be armed with eight D-5 SLBMs, or half the number to be carried by the Columbia class. The modular design of the CMC (Common Missile Compartment) will accommodate this difference. The UK provided some of the funding for the design of the CMC, including a large portion of the initial funding

The Columbia-Class submarine will be powered by an electric-drive propulsion system that includes an electric motor driving the propeller of the boat. It will use a nuclear reactor to produce the necessary electrical energy to supply the electric propulsion motor. The submarine will be able to sail at a speed of 20 k (38 km/h) and operate at a depth of 250 m.