Seattle Port of Embarkation

Seattle Port of Embarkation
Name	Seattle Port of Embarkation
Country	United States
Location	Seattle, Washington
Type	Port
Used	1942–1945
Controlled by	United States Army

Seattle Port of Embarkation

The Seattle Port of Embarkation served as a major United States Army embarkation point during World War II, handling troop movements and materiel bound for the Pacific Theater, and interfacing with commercial shipping lines, regional railroads, and naval facilities in the Puget Sound region. Established amid rapid expansion of U.S. Army Transportation Service facilities, the port linked Seattle-area industrial centers, including the Boeing Company and Sperry Corporation, with strategic destinations such as Guadalcanal, Iwo Jima, and Okinawa while coordinating with agencies like the War Shipping Administration, United States Navy, and Office of Strategic Services.

History

The port's origins trace to prewar maritime commerce centered on Elliott Bay, Smith Cove, and the Seattle Waterfront, where shipping companies such as the Matson Navigation Company, American President Lines, and Pacific Steamship Company operated alongside local employers like Seattle-Tacoma Shipbuilding Corporation and Todd Shipyards. Following the attack on Pearl Harbor, Army planners from the Transportation Corps (United States Army) and the War Department designated the facility as an embarkation point, expanding wharves, warehouses, and staging areas in coordination with the Port of Seattle and the Office of the Quartermaster General. During the war the port processed convoys bound for Alaska, the Aleutian Islands Campaign, and Central Pacific operations, interfacing with bases at Tacoma, Everett, and the Puget Sound Naval Shipyard.

Organization and Administration

Administration involved the United States Army Transportation Corps, the Army Service Forces, and liaison officers from the War Shipping Administration and the United States Navy. Command relationships included coordination with the Western Sea Frontier and regional commands such as Alaskan Department headquarters and the South West Pacific Area staff when routing convoys and assigning escorts from Escort Division (United States Navy). Civil-military coordination required the Port of Seattle commission, local municipal authorities including the Seattle City Council, and private operators like Great Northern Railway and Northern Pacific Railway to integrate schedules, labor from International Longshoremen's Association, and security measures influenced by the Federal Bureau of Investigation and Civilian Defense organizations.

Facilities and Infrastructure

Facilities comprised deepwater piers at Pier 90 (Seattle), Pier 91 (Seattle), and adjacent terminals, expansive warehouses, staging yards, and troop embarkation sheds linked to railheads serving Seattle Union Station and yards of the Chicago, Milwaukee, St. Paul and Pacific Railroad. Ship repair and conversion work occurred at Todd Shipyards and Boeing Plant 2-adjacent facilities, while cargo handling used cranes and gear provided by firms such as Puget Sound Machinery Company; refrigerated storage supported perishables for units operating from Aleutians Campaign bases. Navigational aids included buoys maintained by the United States Lighthouse Service and coordination with the United States Coast Guard for pilotage and convoy assembly in Elliott Bay and the Hiram M. Chittenden Locks approach.

Military Operations and Role in World War II

The port embarked divisions, regiments, and support units destined for the Pacific Ocean Areas and the South Pacific Area, processing units that fought in operations at Guadalcanal Campaign, Gilbert and Marshall Islands campaign, Mariana and Palau Islands campaign, and Philippine Islands campaign (1944–45). It coordinated troop ships, including converted liners and transports like USS Black Hawk-class auxiliaries, with escort vessels assigned by Commander, Pacific Fleet and convoy routing advised by the Naval Intelligence apparatus. The port supported specialized movements for units such as the Alaskan Scouts, 1st Marine Division, and Army Air Forces ground echelons for bases like Elmendorf Field and Hickam Field, while also managing redeployment and casualty evacuation tied to medical facilities including Madigan Army Medical Center.

Cargo and Passenger Services

Cargo operations handled ordnance, vehicles, fuel, and construction materials from suppliers including Boeing, General Motors, and regional shipyards, and shipped Lend-Lease and allied supplies routed via Alaska Highway logistics links and transshipment points such as Kodiak and Honolulu. Passenger services moved soldiers, marines, sailors, and civilian specialists on troopships and contracted passenger liners from companies like Matson and American President Lines, with staging involving embarkation manifests coordinated with the Adjutant General's Office and transportation routing through Seattle-Tacoma International Airport and rail connections.

Transportation Connections

The port integrated with major railroads—Great Northern Railway, Northern Pacific Railway, and Union Pacific Railroad—and with motor transport firms and trucking routes to military depots like Fort Lewis and supply centers at McChord Field. Airlift and ferry coordination included ties to Boeing Field, King County Ferries predecessors, and Puget Sound Naval Air Station seaplane facilities, while maritime convoy assembly linked with Pacific convoy routes originating from San Francisco and San Diego staging points under the coordination of the Western Sea Frontier.

Legacy and Preservation =

Postwar, many embarkation piers reverted to commercial use under the Port of Seattle and underwent redevelopment associated with projects such as the Seattle Aquarium precinct and urban renewal of the Seattle Waterfront. Historic preservation efforts have documented wartime structures in collections at the University of Washington Libraries Special Collections, the Washington State Historical Society, and municipal archives, while veterans' associations including the Veterans of Foreign Wars and American Legion commemorate embarkation activities in oral histories and memorials. Elements of the port's wartime infrastructure influenced later maritime logistics planning at Port of Tacoma and informed heritage interpretation at sites like the Museum of History & Industry (Seattle). Category:Ports and harbors of Washington (state)