You are correct that Boeing's Plant 2 was the famous B-17 manufacturing facility that, during WWII, produced an advertised 16 Flying Fortresses a day. Sadly, it was torn down. Now it's a large parking lot with a restored natural shoreline. No new building has replaced it. Boeing has been doing a significant environmental clean-up on the Duwamish River, and recreating salmon and other wildlife habitat there.
In this Googlemaps page, click on the
"Earth View" box at lower left. The area across the Duwamish River just to the east of the South Park Bridge is the former location of Boeing's Plant 2.
https://www.google.com/maps/place/South ... e195?hl=enThe environmental remediation effort is quite extensive, returning a large portion of the shoreline to a natural state. You can read about it here:
http://www.boeing.com/features/2015/05/ ... 05-15.page--Tom