This web site has been reporting for more than a decade about the possibility that the Hood Canal Floating Bridge may be the blocking endangered species such as juvenile chinook and steelhead. Data from a few years back has now been ground truthed with videos that show exactly what is happening underwater.
Should the bridge be replaced? Maybe in the next twenty years, yes. A suspension bridge may be the best option. But in the meantime we need to find a way to solve this problem without that option. Stay tuned.
https://q13fox.com/2019/05/09/survive-the-sound-hood-canal-bridge-blocks-migrating-fish/