after a one-year environmental impact study was completed, and with Congressional approval, the Secretary of the Navy announced that Kings Bay would be the future home port for the new Trident-missile submarines in the Atlantic Ocean. The decision to base the Trident submarines at Kings Bay started the largest peacetime construction program ever undertaken by the U.S. Navy. The program took nine years to complete at a cost of about $1.3 billion. The building project included the construction of three major commands: Trident Training Facility (TTF), Trident Refit Facility (TRF), and Strategic Weapons Facility, Atlantic (SWFLANT). On 15 January 1989, the first Trident submarine, , arrived at Kings Bay. She was followed by later that same year. was commissioned at Kings Bay in October 1990, and she was followed by in July 1991; in June 1992; in July 1993; in July 1994; in August 1995, and in July 1996. The commissioning of in September 1997 gave Kings Bay its maximum number of ten Trident submarines. The enormous construction and organizational effort put forth by all the commands at Kings Bay reached their first goal in late March 1990, when the Trident II (D-5) missile made its first deterrent patrol on board the USS Tennessee. Post Cold-War Era The end of the Cold War and the reorganization of Naval and Air Force strategic weapons forces during the 1990s had a significant effect on the submarine base at Kings Bay. A high-level nuclear weapons policy review recommended that the U.S. Navy reduce its number of Trident Fleet Ballistic Missile submarines from 18 to 14 by 2005. The decision was made to temporarily decommission the four oldest Ohio-class Trident missile submarines for extensive shipyard work in order to convert them into guided-missile submarines (SSGNs) carrying large numbers (about 150) of conventionally armed Tomahawk cruise missiles. These converted submarines also have accommodations for significant numbers of Navy SEALs or Marines. Furthermore, several Trident submarines were transferred from the Atlantic Fleet to the Pacific Fleet. USS Pennsylvania departed on 4 August 2003 and USS Kentucky departed on 24 August 2003, bound for the Trident submarine base at Bangor, Washington, as part of balancing the Trident fleet. In addition, both USS Louisiana and USS Maine were transferred to the Pacific Fleet in 2005. USS Florida and USS Georgia completed their conversions into guided missile submarines in 2006 and 2008, respectively, and now have their home port