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Trident Refit Facility Bangor (TRFB)

Trident Refit Facility Bangor (TRFB) is an Echelon 4 command under PSNS & IMF. TRFB was established on July 1, 1981, under the command of Capt. M. S. Greer Jr. as the primary maintenance facility for the U.S. Navy's Pacific-based ballistic missile submarine (SSBN) fleet.

TRFB utilizes the Delta Pier (so named because its triangular configuration resembles the Greek letter Delta) to refit submarines. The Delta Pier was built by Naval Submarine Base Bangor in support of Trident submarines. The unique design of the Delta Pier was constructed parallel to the shoreline and has one of the largest dry docks built by the Navy. It can support simultaneous maintenance on five of Pacific Fleet’s eight assigned Trident submarines at one time.

On Aug. 12, 1982, USS Ohio (then-SSBN 726) was the first Trident submarine to arrive at TRFB for maintenance.

In 1998, TRFB consolidated with Shore Intermediate Maintenance Activity (SIMA), Everett and its detachment Bremerton. The command officially became known as Naval Intermediate Maintenance Facility, Pacific Northwest (NAVIMFAC, PACNORWEST). The command was informally known as IMF.   

In October of 2003, IMF consolidated with the Puget Sound Naval Shipyard and became a subordinate command of Puget Sound Naval Shipyard and Intermediate Maintenance Facility (PSNS & IMF).  The civilian workforce was consolidated with the shipyard workforce, and many support functions were combined under PSNS & IMF.

On June 4, 2004, a significant milestone was reached when the 500th Trident refit was completed on the USS Pennsylvania (SSBN 735).

On Nov. 7, 2008, TRFB became an Occupational Safety and Health Administration (OSHA) Voluntary Protection Program (VPP) Star Site, granted to organizations with injury and illness rates below the industry average and have safety and health programs beyond the minimum OSHA requirements.

On Oct. 1, 2018, an organizational realignment was executed that returned the civilian workforce to TRFB, and stood-up many support functions at TRFB that were previously provided by PSNS & IMF.  The command was officially renamed Trident Refit Facility Bangor on Nov. 15, 2018.

Today, TRFB maintains a single focus to support the nation’s strategic deterrence mission by repairing, incrementally overhauling, and modernizing SSBN submarines during refits for the Ohio-class and the future Columbia-class until the end of service life. The TRFB team is comprised of approximately 500 military and 1,500 civilians.

Go to www.navsea.navy.mil/Home/TRFB/ to learn more about the command.

Driving Directions from Seattle-Tacoma International Airport to Intermediate Maintenance Facility 

Contractor Links

Military and Civilian Links

Bangor Area Links *

  • Bremerton Chamber of Commerce - Events, history, map, and other information about Bremerton.
  • Kitsap County - Official County Government site which includes links to various Kitsap County points of interest.
  • Kitsap Transit - Kitsap Transit Bus Schedule, Washington State Ferries, Horluck Ferry Schedule, Terminal Parking, etc.
  • Kitsap Peninsula Visitor & Convention Bureau - Attractions and activities information for local areas, including: Bainbridge, North Kitsap (Hansville, Port Gamble, Kingston, Suquamish, Indianola, Poulsbo, Keyport), Central Kitsap (Silverdale, Bremerton, Seabeck), South Kitsap (Port Orchard, Manchester, Harper, Southworth, Olalla) and North Mason (Belfair).

Surrounding Community Sites *        

Bainbridge  Kent  Puyallup 
Edmonds Olympia  Renton
Everett  Port Orchard   Seattle 
Issaquah Port Townsend Shelton 

Washington State Links        

* Please Note: The appearance of external hyperlinks does not constitute endorsement by the United States Department of Defense, the United States Department of the Navy and Puget Sound Naval Shipyard and Intermediate Maintenance Facility of the linked web sites, or the information, products or services contained therein. For other than authorized activities such as military exchanges and Morale, Welfare and Recreation (MWR) sites, the United States Department of Defense, the Department of the Navy and Puget Sound Naval Shipyard and Intermediate Maintenance Facility does not exercise any editorial control over the information you may find at these locations. Such links are provided consistent with the stated purpose of this DoD web site.

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