2006
- Expert Review Panel
- Draft EIS
- 4+2 configuration selected by Governor
2007
- Mediation process starts
- Mediator submits progress report
- Independent review of alternative designs
- Eastside design collaboration and decisions
- Regional Transportation Investment District/Sound Transit ballot measure
- High-capacity transit draft plan
2008
- Finance plan
- Governor announces accelerated project schedule
- Floating bridge and Eastside design
- Mediation process complete
- Project impact plan
2009
- Supplemental draft EIS and comment period
- Pontoon construction starts at existing facility in Tacoma
- Draft EIS for pontoon construction at Port of Grays Harbor
2010
- Final EIS for SR 520 corridor
- Permitting begins for SR 520 corridor
- Begin construction of new pontoon construction site
2011
- Begin pontoon construction at new site
- Record of decision for SR 520 corridor
- Begin construction of 108th Avenue Northeast direct transit ramp
2012
- SR 520 corridor construction starts
2014
- New bridge open to drivers
2016
- New six-lane corridor open to drivers
2018
Download a printable version of the updated Project Schedule (pdf 246 kb).