Lake Washington steamboats and ferries sternwheeler "Lena C. Gray" was built in Seattle, and operated on Lake Washington most of the time, towing barges. In about 1886, Edward F. Lee established a shipyard on the west side Lake Washington. The Lee yard is believed to have built the following ships that worked Lake Washington and Puget Sound: the small steam scow "Squak", "Laura Maud", "Elfin", "Hattie Hansen" (also known as "Sechelt"), and "Mist". Other early steamboats on the lake were "Kirkland" and "Mary Kraft". G.V. Johnson also built a shipyard on the lake in 1888, and from it launched, among others, the steamers "L.T. Haas",
Puget Sound Central Basin. Puget Sound's sills, a kind of submarine terminal moraine, separate the basins from one another, and Puget Sound from the Strait of Juan de Fuca. Three sills are particularly significant—the one at Admiralty Inlet which checks the flow of water between the Strait of Juan de Fuca and Puget Sound, the one at the entrance to Hood Canal (about below the surface), and the one at the Tacoma Narrows (about ). Other sills that present less of a barrier include the ones at Blake Island, Agate Pass, Rich Passage, and Hammersley Inlet. The depth of the basins is