Puget Sound Bridge and Dredging Company
Corporate brand
UnclaimedA Seattle-based American construction, dredging, and shipbuilding company that helped create Harbor Island and built vessels for commercial, ferry, and U.S. Navy service.
Last updated August 26, 2026
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Overview
Puget Sound Bridge and Dredging Company was a major Seattle construction, dredging, and shipbuilding enterprise active from 1898 until its corporate identity was replaced after a 1959 acquisition. Its principal works were located on the southwestern corner of Harbor Island in Elliott Bay, Seattle. The company was closely associated with the development of the island itself: it undertook the large-scale filling and construction work that created Harbor Island, completing the artificial island in 1909. Until 1938, Harbor Island was described as the largest artificial island in the world and it remains the largest artificial island in the United States. The company’s activities extended well beyond its Seattle yard. It carried out heavy civil-engineering and infrastructure work in several parts of the United States, including the Umatilla irrigation project in northwestern Oregon, the original King County courthouse in Seattle, Husky Stadium at the University of Washington, a large dam associated with Lake Dallas in Denton County, Texas, the harbor of Port Townsend, Washington, and major floating bridges in the Pacific Northwest. Its bridge work included the first Lake Washington Floating Bridge, completed in 1940, and the first Hood Canal Floating Bridge, completed in 1961. The company also rebuilt railroad locomotives during the early postwar period. Shipbuilding became another defining part of the business. The first vessel attributed to the company was Governor Pingree, a 140-foot flat-bottomed stern-wheeler built in 1898 for the Yukon gold trade. In 1918 it completed Broxton and Snoqualmie, two 5,400-ton steam-powered wooden cargo ships. Although intended for World War I service, both were completed too late for that conflict and subsequently operated in Pacific trade between British Columbia and Australia. During World War II and the years immediately afterward, the yard became a substantial naval production facility. The company built more than 2,000 vessels in total and more than 100 steel ships for the United States Navy during and after World War II, including seaplane tenders, minesweepers, tugs, and barges. During the war it also operated as Associated Shipbuilders, a joint venture with the nearby Lake Union Dry Dock Company. One of its best-known naval vessels was USS Turner Joy, a destroyer later associated with the Gulf of Tonkin Incident in 1964. The yard also built several large ferries for the Washington State Ferry System. In 1959, Lockheed purchased the shipyard, which then became Lockheed Shipbuilding and Construction Company. The acquisition marked the end of Puget Sound Bridge and Dredging Company as the operating identity of the facility, although shipbuilding continued under successor ownership. The yard ultimately closed permanently in 1987. The company’s legacy therefore spans Seattle’s industrial expansion, large-scale reclamation and civil engineering, Pacific Northwest transportation infrastructure, commercial vessel construction, and wartime naval production.
History
Established in Seattle in 1898, Puget Sound Bridge and Dredging Company developed as a diversified heavy-construction enterprise at a time when the Pacific Northwest was expanding its ports, rail connections, waterways, and civic infrastructure. Its base was on the southwestern corner of Harbor Island in Elliott Bay. The company’s work at Harbor Island was particularly significant because it involved creating the industrial island through large-scale filling and construction. That project was completed in 1909 and became one of the defining engineering achievements associated with the company. The firm’s construction portfolio included both regional and national projects. In Oregon, it worked on the Umatilla Project, a large irrigation-canal system completed in the early twentieth century. In Seattle, it constructed the original five-story King County courthouse and Husky Stadium at the University of Washington. Its civil works also included a major dam connected with Lake Dallas in Denton County, Texas, the harbor of Port Townsend, Washington, and transportation infrastructure using floating-bridge technology. The first Lake Washington Floating Bridge was completed in 1940, while the first Hood Canal Floating Bridge followed in 1961. The company also undertook railroad-locomotive rebuilding between 1949 and 1952. Shipbuilding began early in the company’s history. Governor Pingree, completed in 1898, was a flat-bottomed stern-wheeler intended for the Yukon gold trade and is identified as the first vessel built by the company. In 1918, the yard completed Broxton and Snoqualmie, wooden steam-powered cargo vessels of approximately 5,400 tons each. They had been ordered for wartime use during World War I, but their completion came too late for service in that conflict. They later entered Pacific trade between British Columbia and Australia. The company became especially important as a naval contractor during World War II and the postwar period. The reference material credits the enterprise with building more than 2,000 vessels overall and more than 100 steel ships for the U.S. Navy during and after World War II. Its wartime output included Barnegat-class seaplane tenders, Admirable-class and Auk-class minesweepers, as well as tugs and barges. During the war, the yard operated under the name Associated Shipbuilders in a joint venture with Lake Union Dry Dock Company, a nearby Seattle shipbuilding business. This arrangement reflected the scale and urgency of wartime production in the Puget Sound region. Among the naval vessels associated with the yard was USS Turner Joy, one of the two U.S. Navy destroyers later connected with the Gulf of Tonkin Incident in 1964. The company also built several large ferries for Washington State Ferries, linking its industrial capabilities to the region’s public transportation system. In 1959, Lockheed acquired the shipyard. The facility subsequently became Lockheed Shipbuilding and Construction Company, ending the Puget Sound Bridge and Dredging Company name as the principal identity of the yard. The site continued its shipbuilding history under the Lockheed name for several decades, but it ultimately closed permanently in 1987. The company is therefore best understood as a historical industrial enterprise whose legacy rests on Seattle land reclamation, Pacific Northwest infrastructure, commercial vessels, public ferries, and large-scale American naval production.
- 1987
Shipyard permanently closed
[1]The former yard permanently closed under successor ownership.
- 1961
First Hood Canal Floating Bridge
[1]The first Hood Canal Floating Bridge was completed as part of the company’s later bridge-related work.
- 1959
Acquisition by Lockheed
[1]Lockheed acquired the shipyard, which became Lockheed Shipbuilding and Construction Company.
- 1949
Railroad locomotive rebuilding
[1]The company undertook railroad-locomotive rebuilding work during the early postwar period.
- 1941
Wartime naval production
[1]During World War II, the yard operated as Associated Shipbuilders in a joint venture with Lake Union Dry Dock Company and produced large numbers of naval vessels.
- 1940
First Lake Washington Floating Bridge
[1]The company completed the first Lake Washington Floating Bridge, a major regional transportation project.
- 1931
Port Townsend harbor works
[1]The company completed work associated with the harbor of Port Townsend, Washington.
- 1920
Husky Stadium construction
[1]The company completed construction work on the original Husky Stadium at the University of Washington.
- 1918
Broxton and Snoqualmie completed
[1]The yard completed two 5,400-ton wooden steam cargo vessels originally intended for World War I service.
- 1909
Harbor Island completed
[1]Construction of Seattle’s Harbor Island was completed, creating a major artificial industrial island in Elliott Bay.
Products and positioning
A heavy-construction and shipbuilding contractor combining dredging, reclamation, bridges, public works, and naval production, with a strong industrial role in Seattle and the wider Pacific Northwest.
Commercial vessel · 1898
Governor Pingree
Governor Pingree was the company’s first recorded vessel, completed in 1898. It was a 140-foot, flat-bottomed stern-wheeler designed for transportation connected with the Yukon gold trade.
Wooden cargo vessels · 1918
Broxton and Snoqualmie
These two steam-powered wooden cargo ships, each measuring approximately 5,400 tons, were completed in 1918. They were intended for World War I service but entered operation too late for the war and later traded between British Columbia and Australia.
Naval shipbuilding
U.S. Navy vessel programs
During and after World War II, the yard built more than 100 steel vessels for the U.S. Navy, including Barnegat-class seaplane tenders, Admirable-class and Auk-class minesweepers, tugs, and barges. This was the company’s largest and most strategically important production area.
Naval destroyer
USS Turner Joy
USS Turner Joy was a U.S. Navy destroyer built at the Seattle yard. It later became associated with the Gulf of Tonkin Incident in 1964 and is among the company’s best-known naval vessels.
Passenger ferries
Washington State ferries
The company built several large ferries for the Washington State Ferry System, contributing to the maritime transportation infrastructure of the Pacific Northwest.
Land reclamation and civil engineering · 1909
Harbor Island
Harbor Island was a major artificial-island and industrial-land project in Seattle’s Elliott Bay. The company completed its construction in 1909, creating a lasting platform for port and industrial activity.
Floating bridge · 1940
Lake Washington Floating Bridge
The first Lake Washington Floating Bridge was a major transportation project completed in 1940 and represented the company’s role in developing large-scale bridge infrastructure in Washington State.
Floating bridge · 1961
Hood Canal Floating Bridge
The first Hood Canal Floating Bridge was completed in 1961. It was among the company’s later major bridge projects, completed near the end of the company’s original corporate era.
Brand decisions
1959
Lockheed acquisition of the shipyardM&ABackground
After decades of construction and naval production, the shipyard entered a new ownership phase.
Action taken
Lockheed purchased the shipyard and renamed it Lockheed Shipbuilding and Construction Company.
Aftermath
The Puget Sound Bridge and Dredging Company identity ceased to be the principal operating brand, while shipbuilding continued under Lockheed until the yard’s permanent closure in 1987.
1941
Operate wartime production through Associated ShipbuildersStrategyBackground
The wartime demand for naval vessels expanded production requirements across the Puget Sound shipbuilding industry.
Action taken
Puget Sound Bridge and Dredging Company operated under the Associated Shipbuilders name in a joint venture with Lake Union Dry Dock Company.
Aftermath
The arrangement supported large-scale wartime output, including seaplane tenders, minesweepers, tugs, and barges.
Sources1 sources
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