Program Videos and Interactive Tools

Construction Cameras

Check the view from our live construction cameras.

Note for iPhone/iPad users: Download the OxBlue app. Select "open link" and type alaskanwayviaductreplacement (no spaces).

Simulations

Click to view video - Keeping waterfront traffic moving during SR 99 tunnel construction. — **Keeping waterfront traffic moving during SR 99 tunnel construction (2012)** - Simulation shows changes in access to the Seattle ferry terminal during SR 99 tunnel construction. View on YouTube or download WMV file .

**SR 99 tunnel south portal and South Holgate to South King Street construction (2012)** - Interactive simulation describes how the tunnel's south portal and the south end viaduct replacement will be constructed.

**SR 99 tunnel north portal and Mercer Corridor construction (2011)** - Interactive simulation describes how the tunnel's north portal and the City's two-way Mercer Street project will be constructed.

**SR 99 construction bypass drive-through (2011)** shows how SR 99 operates after October 2011, when the viaduct's south end was demolished. View on YouTube .

**Tunnel drive-through video (2010)** shows an early design concept for the SR 99 tunnel and the access provided at its north and south portals. View on YouTube or download WMV file .

**Tunnel underground video (2010)** shows the SR 99 tunnel’s route beneath downtown Seattle and its proximity to other underground structures. View on YouTube or download WMV file .

**Simulated collapse of Alaskan Way seawall and viaduct (2009)** shows what could happen to both structures if a strong earthquake were to shake the Puget Sound region. View on YouTube or download WMV file .

**Tunnel boring machine animation (2009)** explains how a bored tunnel is constructed. View on YouTube or download WMV file.

Construction videos

SR 99 Tunnel Project videos:

December 2012 SR 99 tunnel boring machine ceremony in Osaka, Japan (view on YouTube)

October 2011 demolition videos:

Last public walk on the viaduct's south end.
South end viaduct demolition time-lapse.
Crews demolish a viaduct span near South Royal Brougham Way.
Two munchers attack the viaduct during demolition.
Crunchers work to break loose beams and roadway.

South end viaduct replacement:

South end bridge completion time lapse video (view on YouTube).