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