Lockheed Shipbuilding and Construction Company (a.k.a. Lockheed Shipbuilding), was a shipyard in Seattle, Washington with Yard 1 on Harbor Island and Yard 2 at what is now Jack Block Park at Seattle Terminal 5, both at the mouth of the West Waterway of Duwamish River. Yard 1 was founded in 1898 as the Puget Sound Bridge and Dredging Company, the company that built Harbor Island, and it was purchased by Lockheed in 1959. Yard 2 began operation in 1943 to build ships for the US Navy. The shipyard was permanently closed in 1988; Yard 2 was sold in 1989, and Yard 1 was sold in 1997, both to Port of Seattle.