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 faults geologic province is the approximately 50 million year (Ma) old marine basalts of the Crescent Formation, part of the Siletzia terrane that underlies western Washington and Oregon. East of Puget Sound the basement of the Cascades province is various pre-Tertiary (older than 65 Ma) metamorphic rock. Somewhere between Puget Sound and Cascades foothills these two geological provinces come into contact. As the juxtaposition of various disparate tectonic structures in northwest Washington requires significant strike-slip movement, it is further expected that this contact will be a major fault. The northern end of the Crescent Formation (aka Metchosin Formation) has been identified