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 salmon recovery This was the beginning of the Puget Sound Salmon Recovery Project. In 2005, Shared Strategies presented a regional plan for the recovery of ESA listed Chinook salmon in the Puget Sound. After two years of clarifying, finalizing and expanding the proposal making sure it complied with all ESA requirements, NOAA finally adopted the final Puget Sound Salmon Recovery Plan. However, the cost of this recovery plan is enormous, according to the Washington State Recreation and Conservation Office this recovery plan has an estimated cost of 1.42 billion dollars for the first ten years. What the Puget Sound Partnership is Doing