Emergency response exercise in the tunnel this Thursday
An emergency response drill this Thursday will bring a new dimension to the ongoing testing of the SR 99 tunnel's many interconnected systems. This full-scale exercise will give the agencies involved in responding to tunnel events or emergencies a chance to practice in the tunnel.
The exercise will involve staged crashes, actors playing injured travelers, emergency response crews, and activation of the tunnel's deluge fire suppression system. Most of the activity will take place inside the tunnel, but people near the tunnel's north portal might see vehicles or drill participants. Representatives from WSDOT, SDOT, the Seattle Police and Fire Departments, King County Metro Transit and the federal Transportation Security Administration will be involved.
The tunnel is set to open in early 2019 after tunnel testing and commissioning is complete and crews build the ramp and roadway connections at both ends of the tunnel. The final burst of work on those ramp and roadway connections will begin with the start of the #realign99 closure, scheduled to begin January 11, 2019.