Tolling the SR 99 Tunnel
Funding for the $3.2 billion viaduct replacement program comes from state, federal and local sources as well as the Port of Seattle and tolls on drivers using the tunnel. The 2012 Legislature directed WSDOT to collect tolls in the SR 99 tunnel in order to fund ongoing tunnel maintenance and raise $200 million to repay construction bonds used to build the tunnel. Tolls could also pay for future tunnel operations and maintenance costs, similar to other toll facilities in Washington. Tolling of the SR 99 tunnel is anticipated to begin after the tunnel opens to drivers.