Willamette River Crossing (Portland-Milwaukie Light Rail Project)
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Transcript of Willamette River Crossing (Portland-Milwaukie Light Rail Project)
Willamette River Transit Bridge
PSU CTS Seminar January 16, 2009
Dave Unsworth, TriMet
Guenevere Millius, Portland Design Commissioner, WRBAC member and SRM Architecture and Marketing
Willamette River Transit Bridge
• Portland-Milwaukie Light Rail Project • Plans for a new Willamette River Bridge• Public Process
Today’s Agenda
Willamette River Transit BridgePortland-Milwaukie Light Rail Project
Light Rail Project:• 11 stations – one future station (SE
Harold) • 2,000 park and ride spaces
• Tacoma • Park Avenue
• 7.3 miles • Shared transitway• Connects to trails
Willamette River Transit BridgePortland-Milwaukie Light Rail Project
Light rail would:• 27,400 daily transit trips • Result in 8.2 million transit trips per year• Create more than 9,040 new jobs• Generate more than $314 million in
personal income• Transit travel time savings • Increased transit mode Portland
Existing light rail:• $6 billion invested near stations • 15,000 new housing units• 100,000 daily light rail trips and growing -
up 3.2% from last year
Willamette River Transit Bridge
• 1 million new residents in region
• 100,000 new jobs in this growing corridor
Exciting Future Lies Ahead
Willamette River Transit Bridge
South Waterfront Tomorrow
Builds Transit Capacity
Willamette River Transit Bridge
OHSU’s South Waterfront Master Plan with rail
Growing South Waterfront
Willamette River Transit BridgeAnchors the Innovation Quadrant
Willamette River Transit Bridge
Willamette River Transit BridgeLocally Preferred Alternative Alignment
Willamette River Transit BridgeWillamette River Bridges
2
1
3
4
5
2
1
3
4
5
Source: The Portland Bridge Book
Willamette River Transit Bridge
67
8
10
9
10
7
6
8
9
Source: The Portland Bridge Book
Movable Bridges – 5 totalFixed Bridges – 5 total
New
Will
amet
te R
iver
Bri
dg
e
Willamette River Bridges
Willamette River Transit Bridge
Created Review Teams• Willamette River Bridge Advisory Committee (WRBAC)
• Working Group (technical staff and consultants)
Willamette River Transit Bridge
Willamette River Transit Bridge
Bob Durgan Andersen ConstructionThomas Hacker THA ArchitectureArt Johnson KPRR Consulting EngineersSue Keil Portland Department of TransportationPat Lacrosse OMSIGuenevere Millius SRM Architecture and Marketing, Inc.Karl Rohde Bicycle Transportation AllianceDavid Soderstrom Portland Opera BoardChuck Steinwandel Ross Island Sand and GravelMark Williams OHSURick Williams BPM DevelopmentMike Zilis Walker & Macy
Committee Chair FacilitatorMayor Vera Katz David Knowles
Willamette River Bridge Advisory Committee
Willamette River Transit BridgeWillamette River Bridge Advisory Committee
Meetings in 2008:
July 8August 8September 16October 8November 13December 11
Next meeting:February 5, 2009
Willamette River Transit Bridge
trimet.org/WRBAC
Notes, agendas, materials and presentations from:
• WRBAC
• Working Group
Willamette River Transit Bridge
Deliver a bridge that embodies the Portland aesthetic--functional and affordable
Vision
• Viable solutions must balance all three
• Cost – the right bridge for the budget
• Function – the right bridge for the use, site and environment
• Aesthetic – the right bridge for the context
Willamette River Transit BridgeWith Schlaich Bergermann as Structural
Bridge Architect: Rosales + Partners
www.rosalespartners.com
Willamette River Transit BridgeWith Greg DeMond as Bridge Architect
Structural: HNTB
www.rosalespartners.com
Both as Primes
Engineer TeamArchitectural Team
Stakeholder Committee
Information Gathering
Develop Range of Potential Bridge Types (Many)
Screen
Engineer, Architecture and Urban Design Development of Initial Viable Alternatives (Some)
Screen
Verify Viable of Alternatives (Few)
Begin Full Public Conversation
Process Diagram
Establish Bridge Design Framework
Willamette River Transit Bridge
The Universe of Bridge Alternatives• Trusses and Arches
• Cable Supported
• Movable
Willamette River Transit Bridge
Proposed Bridge Alignment from SDEIS
1720’-0”
Design Parameters and Constraints
Willamette River Transit Bridge
4.75%4.75%
Ore
gon
Hea
lth &
Sc
ienc
e U
nive
rsity
Dow
ntow
n Po
rtla
nd
Mar
quam
Brid
ge
Ore
gon
Mus
eum
of
Scie
nce
& In
dust
ry
Pro
po
sed
Bri
dg
e A
lign
men
t
± 75’
Design Parameters and Constraints
Additional analysis on vertical clearance to occur during
Preliminary Engineering
Willamette River Transit Bridge
Ros
s Is
land
Brid
ge
Sout
h W
ater
fron
t
OH
SU T
ram
600’ CLEAR
Pro
po
sed
Bri
dg
e A
lign
men
t
Design Parameters and Constraints
LPA included a range of spans
300’ to 780’ clear
Willamette River Transit Bridge
Cost
Evaluation Criteria
Fundamental Performance
Risk
Architectural – Urban Context
Greenway
Environmental – Sustainability
Bridge Operations
Miscellaneous
Opportunities
Willamette River Transit BridgeEvaluation Criteria
Willamette River Transit Bridge
Wave Frame
Tied Arch
Through Arch
Cable Stayed - 4
Cable Stayed - 2
“Some” Bridge Types
Willamette River Transit BridgeExamples
Tied Arch
Willamette River Transit BridgeView ComparisonAerial
Willamette River Transit BridgeView ComparisonWest Bank – OHSU Area
Willamette River Transit BridgeView ComparisonWest Bank – Future Greenway Trail
Willamette River Transit BridgeView ComparisonEast Bank – Greenway Trail
Willamette River Transit BridgeView ComparisonOn the Bridge
Willamette River Transit BridgeView ComparisonOn the River
Willamette River Transit Bridge
Wave Frame
Tied Arch
Through Arch
Cable Stayed - 4
Cable Stayed - 2
“Few” Bridge Types
Willamette River Transit Bridge“Few”
Wave Frame
2 Pier Cable Stayed
4 Pier Cable Stayed
Willamette River Transit BridgeWorking Group Summary
Each alternative has opportunities and challenges
Center-to-center Span Width 680 680 680 795 860
CostRiskFundamental PerformanceArchitecturalUrban ContextGreenwayEnvironmental - SustainabilityBridge OperationsMiscellaneousOpportunity
Wave frame
Tied Arch
Thru Arch
Cable Stayed
Cable Stayed
LegendHigh ScoreModerate ScoreLow Score
To Be Determined
Willamette River Transit BridgeRecent Work
• Evaluated structural performance of options
• Defined construction sequence
• Created computer models
• Analyzed for service loads
• Analyzed for seismic loads
Willamette River Transit Bridge
• Determine member sizes and quantities
• National Constructors Group
– Cost bases
– Cost certainty
– Constructability review
– Contractor’s risk assessment
• J. Paul Silvestri, National Constructors Group
Recent Work
Willamette River Transit Bridge
• Graduate of Stanford
• 39 years building major heavy civil
• Founded National Constructors Group in 1991
• 13 years advising transportation agencies
on construction of major infrastructure projects
• Numerous awards of excellence from public agencies
• Published articles in Civil Engineering, Construction Methods
Engineering News Record, American Segmental Bridge Institute
J. Paul Silvestri
Willamette River Transit Bridge
Cost
Evaluation Criteria
Fundamental Performance
Risk
Architectural – Urban Context
Greenway
Environmental – Sustainability
Bridge Operations
Miscellaneous
Opportunities
Willamette River Transit BridgeRisks
• Foundations
• Material – Substructure
• Material – Superstructure
• Fabrication - Erection
• Schedule
• Design
Wave Frame
2 Pier Cable Stayed
4 Pier Cable Stayed
Willamette River Transit BridgeOpportunities and Challenges
Cable Stayed 2 Pier
Willamette River Transit BridgeCable Stayed – 2 PierGreenway Opportunity
More open – no landside piers
Willamette River Transit BridgeCable Stayed – 2 PierLifecycle cost Opportunity
Low lifecycle cost - more concrete and less steel
Willamette River Transit BridgeCable Stayed – 2 PierNavigation
760’ Clear
Opportunity
Largest horizontal clearance
Willamette River Transit BridgeCable Stayed – 2 PierEnvironmental Challenge
Piers closest to shallow water
760’ Clear
Willamette River Transit BridgeCable Stayed – 2 PierNavigation Challenge
Lowest vertical clearance (still exceeds 75’)
Willamette River Transit Bridge
Stay Cables – Overhead Catenary Wire
Cable Stayed – 2 PierAccommodation of curved spans at greenway Challenge
Willamette River Transit BridgeOpportunities and Challenges
Cable Stayed 4 Pier
Willamette River Transit BridgeCable Stayed – 4 PierLifecycle cost Opportunity
Low lifecycle cost - more concrete and less steel
Willamette River Transit BridgeCable Stayed – 4 PierRisk Profile Opportunity
Lowest risk profile for schedule and budget
Willamette River Transit BridgeCable Stayed – 4 PierNavigation
700’ Clear
Opportunity
Second largest horizontal clearance
Willamette River Transit BridgeCable Stayed – 4 PierMode Flexibility Opportunity
Accommodates various bike/ped – train/bus configurations
Willamette River Transit BridgeCable Stayed – 4 PierGreenway Challenge
Landside pier closest to greenway
Willamette River Transit BridgeCable Stayed – 4 PierGreenway Challenge
Widest bridge over greenway – 69’ versus 66’
Willamette River Transit BridgeHeight ComparisonSouth Waterfront Development
Willamette River Transit Bridge
0’
50’
100’
150’
200’
250’
300’
125’
CS
4 –
254’
CS
2 –
277’
Height Comparison
350’
325’
250’
South Waterfront Wav
e –
120’
Tram 195’
Willamette River Transit BridgeHeight Comparison
Other Bridges
Willamette River Transit BridgeComparison
Steel Bridge Cable Stayed - 4 Cable Stayed - 2
Willamette River Transit BridgeComparison
198’ 187’ 210’
Steel Bridge Cable Stayed - 4 Cable Stayed - 2
Willamette River Transit BridgeComparison
270’ 254’ 277’
Steel Bridge Cable Stayed - 4 Cable Stayed - 2
Willamette River Transit BridgeOpportunities and Challenges
Wave Frame
Willamette River Transit BridgeWave FrameInnovative Opportunity
Portland known for innovation: Light Rail – Streetcar – Tram
Willamette River Transit BridgeWave FrameEnvironmental
600’ Clear
Opportunity
Piers closer to deeper water
Willamette River Transit BridgeWave FrameEnvironmental Opportunity
Piers farther away from contaminated media
600’ Clear
Willamette River Transit BridgeWave FrameNavigation Challenge
Narrowest horizontal clearance
600’ Clear
Willamette River Transit BridgeWave FramePrototype Challenge
Willamette River Transit BridgeWave FramePrototype Challenge
Increase design and construction engineering costs
Willamette River Transit BridgeWave FramePrototype Challenge
Increase design and construction engineering costs
Bid risk• Reduced competition for steel fabrication
Willamette River Transit BridgeWave FrameSteel Challenge
Higher price volatility than concrete
Willamette River Transit BridgeWave FrameSteel Challenge
Higher price volatility than concrete
• Weld inspections
• Impact to service for recoating (painting)
Increased lifecycle costs
Willamette River Transit BridgeWave FrameEnvironmental
Piers in contaminated media and at top of bank (riparian zone)
Challenge
Willamette River Transit BridgeRevised Risk Summary
Wave Frame
4 Pier Cable Stayed
2 Pier Cable Stayed
Willamette River Transit Bridge
Cost
Evaluation Criteria
Fundamental Performance
Risk
Architectural – Urban Context
Greenway
Environmental – Sustainability
Bridge Operations
Miscellaneous
Opportunities
Willamette River Transit Bridge
Wave frame design was revised
Cost: Baseline Quantity Estimate
Construction methodology was revised
Revised quantities were generated (all three)
Design, market and construction risks were removed
Process
Result
Baseline Quantity Estimate
Contractor style estimates generated
Willamette River Transit BridgeDraft Cost Results
Final Review in Process
$115 – $119M
Over Budget$32 – $37M
$82 – $85MOn Budget
$89 – $93MOver Budget
$7 – $11M
Willamette River Transit BridgeNext Steps
• WRBAC – Staff to report on additional work related to future steel prices and aesthetic opportunities for cable stayed type.
(February 5, 2009)
• Additional design and process to select final bridge type (March 2009)
• WRBAC recommendation to PMLR Steering Committee(March 12, 2009)
Portland-Milwaukie Light Rail ProjectTimeline
2008 dates unless otherwise noted May June July Aug. 2009 2010 2011 2012 2015
Publish Draft Environmental Impact Statement
Adoption of the Locally Preferred Alternative
Submit FTA New Starts Application
FTA Preliminary Engineering Application
Preliminary Engineering
Final Environmental Impact Statement
Final Design
Full Funding Grant Agreement
Construction
Service Begins
Late 2011
2009 - 20102009 - 2010
2010 - 20112010 - 2011
Late 2011-15Late 2011-15
July 2008 - Jan 2009July 2008 - Jan 2009
2009 - 20102009 - 2010
Willamette River Transit Bridge
• Federal share – 60/40– 50/50
• Metro – $72m• State - $250m• Milwaukie $5m
Willamette River Transit Bridge
Thank you.
Questions? Comments?
trimet.org/pm