It ta0877809=smkes about five years to build a Virginia class submarine. The submarines are built in a teaming arrangement by General Dynamics-Electric Boat and Huntington Ingalls Newport News Shipbuilding. The latter builds the stern, habitability and machinery spaces, torpedo room, sail and bow sections. Electric Boat builds the engine room and control room. Both contractors perform work on the reactor plant and alternate on the final assembly, test, outfitting and delivery. After the modules are constructed they are barged to the final construction yard, which for COLORADO is Electric Boat Shipyard in Groton, CT. There the modules are assembled and systems are tested. For more information on the construction process visit this Undersea Warfare Magazine article.


There are three main events in a submarine’s construction.Annie calking her initials The first event is the Keel Laying Ceremony which traditionally celebrated the start of construction. Since submarines really do not have a keel and since the Virginia class submarines are constructed in modules, the Keel Laying Ceremony is typically held about mid-point in construction when one or more modules are available for the ceremony. The Ceremony has the ship’s sponsor chalk her initials on a piece of steel. Those initials are then welded onto the steel by an expert shipyard welder and concludes with the remarks by the sponsor “I hold this keel to be well and truly laid.”  See more about COLORADO’s Keel Laying Ceremony which was held on March 7, 2015.


20161203_ZS40_P1020488_expThe second major event is the Christening.  The Christening is the traditional ceremony in which the ship’s sponsor breaks a bottle of sparkling wine on the bow of the ship and formally names the ship by saying ‘I christen thee COLORADO!. May God bless her and all who sail in her.”. See more about COLORADO’s Christening which was held on December 3, 2016


After launching and christening USS COLORADO will spend several months pier side completing installation and testing of equipment. The final phase of construction is the at-sea trials termed the Alpha and Bravo Sea Trials during which COLORADO will first submerge and conduct numerous tests to prove she is ready for delivery to the Navy.

Alpha Sea Trials

  • First-time submergence
  • High-speed runs
  • Operations at test depth
  • Testing of most systems and components

Bravo Sea Trials

  • Final at sea testing
  • Completion of system and component testing
  • Demonstration of other capabilities

Once the sea trials are completed the COLORADO will be delivered to the Navy.


The final and most widely attended event is the Commissioning. For a naval vessel Commissioning is the act or ceremony of placing a warship in active duty with its country’s military forces with the words “Man this ship and bring her to life”. The shipyard will deliver COLORADO several weeks before the commissioning at the end of sea trials and all other construction testing. The Commissioning is currently anticipated to take place in late summer 2017.

More about the history and significance of Christening and Commissioning can be found at the Navy History and Heritage Command web site.



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