The state’s viaduct replacement projects are estimated to cost $3.2 billion. Funding comes from state, federal and local sources, as well as the Port of Seattle and tolls.

June 2017 update: The Legislature approved a 1.8 percent budget increase for the program, or a cash-flow need of $60 million in the 2017-2019 biennium, to ensure continued progress on the program. The tables below reflect the budget as approved by the Legislature.


More Information

Tolling the SR 99 Tunnel

Advisory Committee on Tolling and Traffic Management

Expert Review Panel

State projects Project status Budget ($M)
SR 99 Tunnel Project (Includes design-build project, north and south access contracts, and new north surface street connections.) Construction $2,102.1
SR 99 South Holgate Street to South King Street Project (south-end viaduct replacement) Construction $347.8
Central Waterfront Viaduct Removal, New Alaskan Way with connections to Elliott and Western avenues and the Battery Street Tunnel decommissioning Planning $257.4
Central Waterfront Construction Mitigation Ongoing $29.7
Other Moving Forward Projects:
  • Column safety repairs
  • Electrical line relocation
  • Battery Street Tunnel repairs
  • Construction mitigation for the south end viaduct replacement
  • Complete
  • Complete
  • Ongoing
  • Ongoing
Program Management   $142.4
Prior Environmental Impact Statements, Right of Way and Design Costs   $163.7
Total Use of Funds   $3,214.6
State Funding
2005 Gas Tax (Partnership Funding) $1,582.0
2003 Gas Tax (Nickel Funding) $326.3
Other State $4.8
Federal $787.2
Local $46.6
Toll $200.0
Port of Seattle $267.7
Total Source of Funds $3,214.6