alaskan way viaduct & seawall replacement program...presentation to the s ttl d i c i iseattle...
TRANSCRIPT
![Page 1: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/1.jpg)
OrganizationDate
Alaskan Way Viaduct & Seawall Replacement Program
Seattle Design CommissionJanuary 21, 2010
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Design Team Members
WSDOT and SDOT have brought on world-class architecture firms to aid in the design of the proposed bored tunnel. The team includes:
• NBBJ
• PB Architects
• ROMA Design Group
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Proposed Bored Tunnel Timeline*
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Initiate contracting
Environmental review and preliminary design
Major construction
Bored tunnel open to drivers
Right of way acquisition and permitting
Viaduct demolition
*Assumes Record of Decision (ROD) for the bored tunnel alternative is issued in 2011.
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New Proposed SR 99 Bored Tunnel Alignment
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New Proposed South Portal
![Page 6: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/6.jpg)
New Proposed North Portal – Option 1
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Presentation to theS ttl D i C i iSeattle Design CommissionJanuary 21, 2010
Update on Bored Tunnel Alternative and North and South Portal Areas
Prepared by ROMA Design Groupi A i ti ith NBBJ
BORED TUNNEL ALTERNATIVE
in Association with NBBJ
![Page 8: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/8.jpg)
Existing North Portal Area
BORED TUNNEL ALTERNATIVE
NORTH PORTAL
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Elements
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 1
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Elements
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 2
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Pedestrian and Bicycle Access
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 1
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Pedestrian and Bicycle Access
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 2
![Page 13: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/13.jpg)
Transit Access
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 1
![Page 14: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/14.jpg)
Transit Access
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 2
![Page 15: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/15.jpg)
Opportunity Areas
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 1
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Opportunity Areas
BORED TUNNEL ALTERNATIVE
NORTH PORTAL: OPTION 2
![Page 17: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/17.jpg)
Tunnel Support Buildings
Support Building Functions
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Tunnel Support Buildings
Support Building Section
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Tunnel Support Buildings
North Site Location
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Tunnel Support Buildings
North Site Design Influences
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Existing South Portal Area
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL
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Elements
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
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Elements
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
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City Streets
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
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City Streets
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
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ComparisonOPTION 1 OPTION 2
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL
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Pedestrian and Bicycle Access
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
![Page 28: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/28.jpg)
Pedestrian and Bicycle Access
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
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Circulation: SR-99 Tunnel
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
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Circulation: SR-99 Tunnel
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
![Page 31: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/31.jpg)
Tunnel to City Streets and 519
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
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Tunnel to City Streets and 519
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
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Conceptual Section at Tunnel Entrance
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL
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Circulation: SR-99 to Alaskan Way
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
![Page 35: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/35.jpg)
Circulation: SR-99 to Alaskan Way
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
![Page 36: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/36.jpg)
Conceptual Section of Alaskan Way
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL
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Circulation to and from 519
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
![Page 38: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/38.jpg)
Circulation to and from 519
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
![Page 39: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/39.jpg)
Transit Access
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
![Page 40: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/40.jpg)
Transit Access
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
![Page 41: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/41.jpg)
Opportunity Areas
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 1
![Page 42: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/42.jpg)
Opportunity Areas
BORED TUNNEL ALTERNATIVE
SOUTH PORTAL: OPTION 2
![Page 43: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/43.jpg)
Tunnel Support Buildings
South Site Location
![Page 44: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/44.jpg)
Tunnel Support Buildings
South Site Design Influences
![Page 45: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/45.jpg)
Overview of South Portal Area
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Pedestrian, Bicycle Linkages
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Gateway to Downtown
![Page 48: Alaskan Way Viaduct & Seawall Replacement Program...Presentation to the S ttl D i C i iSeattle Design Commission January 21, 2010 Update on Bored Tunnel Alternative and North and South](https://reader036.vdocuments.site/reader036/viewer/2022063003/5f6e021051fc1642fe7cf408/html5/thumbnails/48.jpg)
Portal Entrance to Tunnel and Ramps to City
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Alaskan Way – Entering the Downtown Waterfront
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Proposed SDC Meeting Schedule
January 21: Seattle Design Commission • Introduction and UpdateJanuary 21: Seattle Design Commission Introduction and Update• Urban Design Goals and Objectives • Functional plans for portal areas• Preliminary observations of issues and opportunities
February 18: Seattle Design Commission • Guiding Principles and Preliminary Concepts • Potential treatment of ramps, bridges, portals,
support buildings, streets and public ways
March 4: SDC Subcommittee • Concept refinement in response to input
March 18: Seattle Design Commission • Further update of principles and concepts • Preliminary guidelines for components and treatments• Preliminary guidelines for components and treatments
March 31: SDC Subcommittee • Refinement of guidelines for components and treatments in response to input
April 15: Seattle Design Commission • Final presentation of goals and objectives, principles and concepts and visual design guidelines
BORED TUNNEL ALTERNATIVE