Alaskan Way Viaduct

E514992
elevated highway former transportation infrastructure

The Alaskan Way Viaduct was an elevated highway along Seattle’s waterfront that carried a section of State Route 99 before being demolished due to seismic vulnerability and replaced by a tunnel.

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Observed surface forms (7)

Surface form Occurrences
Alaskan Way Viaduct (former elevated highway) 1
Alaskan Way Viaduct (former) 1
Alaskan Way Viaduct replacement and waterfront redevelopment program 1

Statements (47)

Predicate Object
instanceOf elevated highway ⓘ
former transportation infrastructure ⓘ
adjacentTo Elliott Bay NERFINISHED ⓘ
Seattle waterfront NERFINISHED ⓘ
carried motor vehicle traffic ⓘ
north–south traffic through downtown Seattle ⓘ
closedToTraffic 2019 ⓘ
connectedTo Battery Street Tunnel (former) NERFINISHED ⓘ
Spokane Street Viaduct NERFINISHED ⓘ
constructionStart 1950 ⓘ
country United States of America ⓘ
surface form: United States
crosses rail yards along Seattle waterfront ⓘ
demolitionEnd 2019 ⓘ
demolitionStart 2019 ⓘ
environmentalImpact obstructed views of Elliott Bay ⓘ
length approximately 2.0 miles ⓘ
approximately 3.2 kilometers ⓘ
locatedIn Seattle NERFINISHED ⓘ
Seattle waterfront NERFINISHED ⓘ
Washington ⓘ
surface form: Washington (state)
lowerDeckDirection southbound ⓘ
maintainedBy Washington State Department of Transportation NERFINISHED ⓘ
namedAfter Alaskan Way NERFINISHED ⓘ
notableFor controversy over replacement options ⓘ
major component of Seattle’s waterfront freeway system ⓘ
opened 1953 ⓘ
ownedBy State of Washington NERFINISHED ⓘ
parallelTo Elliott Bay shoreline NERFINISHED ⓘ
partOf State Route 99 NERFINISHED ⓘ
U.S. Highway system (state route component) NERFINISHED ⓘ
passesNear Belltown NERFINISHED ⓘ
Pioneer Square NERFINISHED ⓘ
passesThrough Downtown Seattle NERFINISHED ⓘ
projectName Alaskan Way Viaduct Replacement Program NERFINISHED ⓘ
reasonForDemolition earthquake safety concerns ⓘ
seismic vulnerability ⓘ
replacedBy Alaskan Way Viaduct replacement tunnel NERFINISHED ⓘ
State Route 99 tunnel NERFINISHED ⓘ
roadCarried Washington State Route 99 NERFINISHED ⓘ
significantEvent damaged in 2001 Nisqually earthquake ⓘ
status demolished ⓘ
structureType double-deck elevated freeway ⓘ
tunnelLocation beneath downtown Seattle ⓘ
tunnelType bored road tunnel ⓘ
upperDeckDirection northbound ⓘ
urbanImpact separated downtown Seattle from its waterfront ⓘ
vulnerableTo major earthquakes ⓘ

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Alaskan Way → formerlyServedBy → Alaskan Way Viaduct ⓘ
Alaskan Way → adjacentTo → Alaskan Way Viaduct ⓘ
this entity surface form: Alaskan Way Viaduct (former elevated highway)
SR 99 → hasStructure → Alaskan Way Viaduct ⓘ
this entity surface form: SR 99 Tunnel in Seattle
SR 99 → openedTunnelReplacementFor → Alaskan Way Viaduct ⓘ
Washington State Route 99 → hasStructure → Alaskan Way Viaduct ⓘ
this entity surface form: Alaskan Way Viaduct (former)
Washington State Route 99 → replacedStructure → Alaskan Way Viaduct ⓘ
this entity surface form: Alaskan Way Viaduct with State Route 99 Tunnel
Seattle Seawall → partOf → Alaskan Way Viaduct ⓘ
this entity surface form: Alaskan Way Viaduct replacement and waterfront redevelopment program
Seattle downtown street network → intersectsWith → Alaskan Way Viaduct ⓘ
this entity surface form: Alaskan Way Viaduct replacement corridor
Seattle transportation network → hasComponent → Alaskan Way Viaduct ⓘ
this entity surface form: Alaskan Way Viaduct replacement tunnel (SR 99 tunnel)