Last Friday a very nice guide boat maybe a 28 foot boat with twin 250s that fished the sturgeon season and is typically moored at Chinook sunk at its mooring. A very nice boat and nice guy. I asked port officials about it yesterday and learned the owner was in Arizona when it sunk. They were able to get it out and onto a trailer. I walked by that boat checking my boat Thursday afternoon for rainwater, the boat looked fine then. So it went down quickly. The owner told port guys that before leaving he had checked the bilge pumps and with fully charged batteries felt everything was ok. Based on my own boat rainfall did not sink that boat and since he had been using that boat a drain plug was not likely an issue. To me my guess would be structural failure.