What tunnels?
Tacoma Shanghai tunnels
https://www.southsoundtalk.com/2017/04/25/stories-of-chinese-tunnels-in-tacoma-continue-to-this-day/
1940's Tacoma Chinese underground. Interview with Jack
https://www.youtube.com/watch?v=CFv5LBpmZL8
The Real Story of Tacoma's Abandoned Railroad Tunnel
https://groupssa.com/ssa/tacomatunnel.html