Puget Sound faults about 1100 years ago (AD 900—930) an earthquake of magnitude 7+ uplifted Restoration Point and Alki Point, dropped West Point (the three white triangles in the Seattle Basin on the map), caused rockslides in the Olympics, landslides into Lake Washington, and a tsunami on Puget Sound. It extends as far east as (and probably terminates at) the Rattlesnake Mountain Fault Zone (RMFZ; the southern extension of the SWIF) near Fall City. This seems geologically reasonable, as both the SWIF and RMFZ appear to be the contact between Tertiary Crescent Formation basement of Puget Sound on the west and the older
Puget Sound Naval Shipyard and Intermediate Maintenance Facility units are a comprehensive representation of the historic features of the naval shipyard. Puget Sound Naval Shipyard and Intermediate Maintenance Facility Puget Sound Naval Shipyard and Intermediate Maintenance Facility (PSNS & IMF) is a United States Navy shipyard covering 179 acres (0.7 km²) on Puget Sound at Bremerton, Washington in uninterrupted use since its establishment in 1891; it has also been known as Navy Yard Puget Sound, Bremerton Navy Yard, and Puget Sound Naval Shipyard. It is bordered on the south by Sinclair Inlet, on the west by the Bremerton Annex of Naval Base Kitsap, and on the north and