Finally got around to reading the Pacific Northwest section of the Sunday Times and found an article about all of the tunnels that run under the Puget Sound region. They show a map of the ones under Seattle, and there is one that runs East-West under the Admiral District. Does anybody have any idea of what this tunnel is for?
Here is a link to the article:
http://seattletimes.nwsource.com/html/pacificnw/2016900003_pacificptunnels11.html
Go to picture #12 and you will see the map of tunnels.





















































































