The state’s viaduct replacement projects are estimated to cost $3.1 billion. Funding comes from state, federal and local sources, as well as the Port of Seattle and tolls.

December 2016 update: Based on a recent review of the budget, the program is anticipating a 1.8 percent budget increase, or a cash-flow need of up to $60 million in the 2017-2019 biennium, to ensure continued progress on the program. A total provisional budget need of $149 million may be needed to complete the program. The tables below reflect the budget as approved by the Legislature, and do not include these additional funding needs.


More Information

Tolling the SR 99 Tunnel

Advisory Committee on Tolling and Traffic Management

Expert Review Panel

State projects Project status Budget
SR 99 Tunnel Project (Includes design-build project, north and south access contracts, and new north surface street connections.) Construction $2,053.2
SR 99 South Holgate Street to South King Street Project (south-end viaduct replacement) Construction $351
Central Waterfront Viaduct Removal, New Alaskan Way with connections to Elliott and Western avenues and the Battery Street Tunnel decommissioning Planning $291.7
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   $75.0
Prior Environmental Impact Statements, Right of Way and Design Costs   $163.7
Total Use of Funds   $3,137.4
State Funding
2005 Gas Tax (Partnership Funding) $1,523.0
2003 Gas Tax (Nickel Funding) $326.3
Other State $4.8
Federal $787.2
Local $28.4
Toll $200.0*
Port of Seattle $267.7**
Total Source of Funds $3,137.4

* The 2009 Legislature stated the finance plan must include no more than $400 million in toll funding. The budget amount was revised to $200 million during the 2012 legislative session, and an additional $200 million in federal funds was provided to the program.

**The Port of Seattle has committed $300 million to the replacement program. The state signed an agreement with the Port in August 2013 for this funding. To date, $25 million of the Port’s contribution has been used for program-related work.