WEST APPROACH BRIDGE - VISION
Our vision for the SR 520 corridor is to become the premier gateway for the City of Seattle by reconnecting to the early Seattle vision of Nature meets City.yy
We intend to implement our Program in a manner that yields affordable solutions and fosters groundbreaking sustainability practices that support regional and local connectivity, ecology and the use of low-carbon materials. Further, the design of the corridor will balance aesthetics, functionality, proportion and sense of speed along the SR 520 facility to provide a memorable experience for all users.
November 2012DRAFT
Øresund BridgeCopenhagen, Denmark/Malmo, Sweden
Dauphin Island Bridge/Gordon Persons BridgeMobile County, Alabama
Robert Moses Causeway Suffolk County, New York
Eau Gallie CausewayEau Gallie, Florida
Tay Road BridgeFirth of Tay, Scotland
WEST APPROACH BRIDGE - DESIGN INSPIRATION
November 2012DRAFT
Baseline Design
NORMAL HIGH WATER LINE
WEST APPROACH BRIDGE - DESIGN PROGRESSION
November 2012DRAFT
9-20-2012Seattle Design Commission Meeting
NORMAL HIGH WATER LINE
WEST APPROACH BRIDGE - DESIGN PROGRESSION
November 2012DRAFT
10-10-2012Seattle Design Commission Subcommittee Meeting
NORMAL HIGH WATER LINE
WEST APPROACH BRIDGE - DESIGN PROGRESSION
November 2012DRAFT
Preferred Design
NORMAL HIGH WATER LINE
WEST APPROACH BRIDGE - DESIGN PROGRESSION
November 2012DRAFT
Preferred DesignExpansion Joints
NORMAL HIGH WATER LINE
WEST APPROACH BRIDGE - DESIGN PROGRESSION
November 2012DRAFT
November 2012DRAFT
Baseline
Preferred
NORMAL HIGH WATER LINE
NORMAL HIGH WATER LINE
West Approach Bridge South
West Approach Bridge South
West Approach Bridge North
West Approach Bridge North
WEST APPROACH BRIDGE - DESIGN PROGRESSION
SUSTAINABILITY GOALS Design and construc on of the West Approach Bridge con nues to meet and augment SR 520 sustainability goals by lessening construc on impacts and reducing concrete volumes by nearly 50 percent from the baseline design to the preferred design. This reduc on in concrete is achieved through:
• Innova ve technologies, such as seismic isola on bearings• Simplifi ca on and reduc on of substructure elements
The reduc on in concrete has the poten al to produce signifi cant carbon dioxide (CO2) emission reduc ons.
1
6
Minimumcolumn
diameter
1/3
1/3
1/3
8’-7”
Minimum column
diameter
Isolation bearing
Future screw jack location
TOP OF COLUMN
BOTTOM OF COLUMN
COLUMN ELEVATION
6’-0” 3’-6”
Tangent curve
Beginning of flare
TYPICAL COLUMN DETAILS6’ Ø COLUMN 5’ Ø COLUMN 4.5’ Ø COLUMN
November 2012DRAFT
TYPICAL COLUMN DETAILS AT EXPANSION JOINTS PIER 34 PIER 27 PIERS 9 & 18
1
6
Minimumcolumn
diameter
1/3 1/31/3
8’-7”
Minimum column
diameter
Isolation bearing
Isolation bearing
Future screw jack location
TOP OF COLUMN
BOTTOM OF COLUMN
COLUMN ELEVATION
7’-0”
Tangent curve
Beginning of flare
10’-6”
November 2012DRAFT
TEMPORARY SUPPORTS
November 2012DRAFT
FEIS VIEWS KEY
FLOATING BRIDGE
VIEW A
VIEW B VIEW C
VIEW D
VIEW E
Union Bay
Lake Washington
November 2012DRAFT
A: VIEW FROM HUSKY STADIUMEX
ISTI
NG C
ONDI
TION
SBA
SELI
NE D
ESIG
NCU
RREN
T DE
SIGN
FEIS VIEWS KEY
FLOATING BRIDGE
VIEW A
VIEW B
VIEW C
VIEW D VIEW E
Union Bay
Lake Washington
November 2012DRAFT
B: VIEW FROM UW WATERFRONT ACTIVITIES CENTEREX
ISTI
NG C
ONDI
TION
SBA
SELI
NE D
ESIG
NCU
RREN
T DE
SIGN
FEIS VIEWS KEY
FLOATING BRIDGE
VIEW A
VIEW B
VIEW C
VIEW D VIEW E
Union Bay
Lake Washington
November 2012DRAFT
C: VIEW FROM MARSH ISLAND BOARDWALKEX
ISTI
NG C
ONDI
TION
SBA
SELI
NE D
ESIG
NCU
RREN
T DE
SIGN
FEIS VIEWS KEY
FLOATING BRIDGE
VIEW A
VIEW B
VIEW C
VIEW D VIEW E
Union Bay
Lake Washington
November 2012DRAFT
D: VIEW FROM WEBSTER POINTEX
ISTI
NG C
ONDI
TION
SBA
SELI
NE D
ESIG
NCU
RREN
T DE
SIGN
FEIS VIEWS KEY
FLOATING BRIDGE
VIEW A
VIEW B
VIEW C
VIEW D VIEW E
Union Bay
Lake Washington
November 2012DRAFT
E: VIEW FROM NORTH MADISON PARKEX
ISTI
NG C
ONDI
TION
SBA
SELI
NE D
ESIG
NCU
RREN
T DE
SIGN
FEIS VIEWS KEY
FLOATING BRIDGE
VIEW A
VIEW B
VIEW C
VIEW D VIEW E
Union Bay
Lake Washington
November 2012DRAFT
23
45
67 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
3536
3738
3940
4142
1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
BELVEDERE
LUMINAIRES
BELVEDERE
Foster Island
WSDOTPeninsula
SIGN BRIDGE SIGN BRIDGESIGN BRIDGE
NORTH ELEVATION
PLAN
FRAME 3
FRAME 3
View 2
View 1
View 3 View 4
MAINTENANCE CATWALK& BELVEDERE
MAINTENANCE CATWALK& BELVEDERE
SIGN BRIDGE
EXPANSION JOINT EXPANSION JOINT EXPANSION JOINT EXPANSION JOINT EXPANSION JOINT
NAVIGATION CHANNEL
FLOATING BRIDGEBELVEDERE
SIGN BRIDGE
ABOVE-BRIDGE ELEMENTS
November 2012DRAFT
View 1 Transition from Lake Washington to Union Bay View 2 Pedestrian view along shared-use path
View 3 Passing over Foster Island View 4 Approaching land and Montlake portal
November 2012DRAFT
FRAME 3, NORTH ELEVATION
pedestrian railing belvederes
sign bridges luminaires
shaft caps
pedestrian railing
luminairesshaft caps
November 2012DRAFT
belvederes & maintenance catwalks
56’
6’
SR 520 westbound lanes
6’
14’ shared-use path 4’-high pedestrian barrier
sign bridges
November 2012DRAFT
West Approach Bridge
Key
Regional shared-use path
General purpose lanes
Transit/HOV lanes
NAVIGATION CHANNEL
PIER 40
PIER 42
PIER 41
PIER 39
WEST APPROACH BRIDGE
FLOATING BRIDGE AND LANDINGS PROJECT
CHANNELIZATION AT PROJECT INTERFACE
TRANSITION SPAN - SOUTH ELEVATION
West Approach Bridge
N
ARCHITECTURAL FEATURES AT PROJECT INTERFACE
November 2012DRAFT