The state’s viaduct replacement projects are estimated to cost $3.3 billion. Funding comes from state, federal and local sources, as well as the Port of Seattle and tolls.

May 2019 update: In the 2017-19 budget, we requested additional funding to deliver the remaining program work. $59 million of this request was approved by the legislature in the 2017 budget, and another $54 million in the 2018 supplemental budget.  $35 million was approved with the 2019 legislative budget.


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Tolling the SR 99 Tunnel

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 $2,125.6
SR 99 South Holgate Street to South King Street Project (south-end viaduct replacement) Construction $347.7
Central Waterfront Viaduct Removal, New Alaskan Way with connections to Elliott and Western avenues and the Battery Street Tunnel decommissioning Planning $328.9
Central Waterfront Construction Mitigation Ongoing $24.7
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   $163.8
Prior Environmental Impact Statements, Right of Way and Design Costs   $163.7
Total Use of Funds   $3,325.7
State Funding
2005 Gas Tax (Partnership Funding) $1,671.0
2003 Gas Tax (Nickel Funding) $326.4
Other State $4.8
Federal $787.2
Local $68.6
Toll $200.0
Port of Seattle $267.7
Total Source of Funds $3,325.7