Alaskan Way Viaduct Replacement Program
Organization
University of Washington
Organization
Date
University of Washington
October 20, 2011
Presentation Overview
• SR 99 south end viaduct replacement.
• Design-build contracting. • SR 99 tunnel project. • Construction partnering.
Di t R i B d
Washington
Ki
C
t
WSDOT Coordination
Washington
State
King County
WSDOT
Port of Seattle
City of Seattle
Program History
2001 2004 2006 2007 2009 2010 2011 Nisqually earthquake damages viaduct. Draft EIS analyzes five alternatives. Supplemental Draft EIS analyzes two alternatives. No/no advisory vote leads to new approach. Governor signs bill endorsing bored tunnel alternative. Public process Final EIS and Record of Decision issued. Supplemental Draft EIS analyzes bored tunnel.Program Overview
The Alaskan Way Viaduct Replacement Program includes projects led by the Washington State Department of Transportation, City of Seattle, King County and Port of Seattle.
Public process
Building the New SR 99 Corridor
S. Holgate Street to S. King Street
Project
SR 99 Tunnel Project
South Holgate to South King Street Project
Before construction December 2013
STAGING AREA CONTINUING CONSTRUCTION
• Roadway will be complete in 2013. • SR 99 remains open during construction.
• Viaduct’s south end will be demolished beginning in October 2011.
Demolition Time Lapse
Video
Building the SR 99 Roadway Foundation
Driving Piles for the New SR 99 Roadway
Constructing Rebar Cages
Supporting the New SR 99 Roadway
Geofoam Embankment
SR 99 Today
Changes to SR 99 After the Closure
What is Design-Build Contracting?
D i B ild th d f j t d li i hi h th
Design-Build – a method of project delivery in which the owner executes a single contract with one entity (the Design-Builder) for design and construction services to provide a finished product.
VS.
Design-Bid-Build –traditional approach for delivery of transportation projects where the owner completes the design p p j p g and accepts the lowest responsive bid for construction from qualified contractors.
• 1998, WSDOT authorized to complete
Design-Build Legislation History
design-build contracting pilot project. • 2001, Design-build contracting
authorized for use on transportation projects more than $10 million.
• 2006, WSDOT authorized to pilot up to five projects between $2 and $10 million.
• 2007, Expiration date deleted from RCW
47.20.780. I-405 Kirkland Nickel Stage 1.
Design-Build Considerations
Time
• Allows construction to start without final design of all project elements.
• Design is tailored to contractors means and methods. • Generally leads to earlier completion date
Budget
• Requires fewer owner staff. • Can lead to earlier cost certainty.
• Errors and omissions not owner’s responsibility. • Additional risk is assigned to contractor.
Comparison of Contracting Approaches
Environmental analysis and preliminary designTypical design-bid-build process
NEPA complete
NEPA complete
Environmental analysis and preliminary design
Permits
Procurement Final design
A l t d d i b ild
NTP 100% design and permits
Procurement Begin construction Begin construction NEPA complete NEPA complete Begin t ti Begin t ti Typical design-build process
Environmental analysis and preliminary design
Permits
Procurement
DB preliminary DB final
design design
Accelerated design-build process
NEPA complete NEPA complete NTP NTP 1 NTP NTP 2 Begin construction Begin construction construction construction
Design-Build Procurement Process
• Request for qualifications
D i B ild t b it t t t f lifi ti
• Design-Build teams submit statements of qualifications (SOQ).
• WSDOT evaluates SOQs and ranks based on predetermined scoring approach.
• Short listed teams notified
• Request for Proposals (RFP)
• Short listed teams prepare proposals.
• WSDOT evaluates proposals based on predetermined scoring approach.
• Best value selection = technical evaluation score x $10,000,000 $ Price Proposal
Before Advertisement of a Design-Build Contract
• Environmental processes mostly completed.
• Major permits approved.
• Right-of-way acquired.
• Preliminary design or conceptual design completed. • Base data such as soil conditions and existing
utilities obtained.
A t ith t id t i d
• Agreements with outside partners acquired. • Project funding secured.
• Goals for project outcome defined.
WSDOT Design-Build Projects
• Majority of projects are lump sum
fi d i
fixed price.
• Selected on basis of best value. • Project duration is typically two to
five years.
• Cost range is from $22 million to $1.3 billion.
• Cost growth historically ranged g y g SR 16 Tacoma Narrows Bridge.
from approximately one to three percent.
• No claims were made on any of the 13 WSDOT projects to date.
Recent WSDOT Design-Build Contracts
• SR-519 Phase Two Intermodal.
• SR 532 Safety Improvements and Congestion Relief.
SR 532
y p g
• SR 520 Bridge and Landings.
• 520 Eastside HOV. • SR 99 Tunnel Project. 29 SR 520 Bridge Replacement. SR 532.
SR 99 Tunnel
• Approximately two miles long.
• Tunnel designed to 2,500 year earthquake standard (in the range of a 9.0 earthquake).
• Project cost is $1.9 billion. Design
concept.
Seattle Center
South Portal Design
Tunnel Boring Machine
Tunneling in Seattle Soils
More than 150 tunnels have been constructed in Seattle since 1890, mostly in glacial soils. Examples of local projects include:
• Sound Transit Beacon Hill Tunnel
• Downtown Seattle Transit
T l
Tunnel
• Mt. Baker Ridge Tunnel (I-90) • Denny Way Combined Sewer
Overflow
• Burlington-Northern Railroad Tunnel.
Link light rail’s tunnel boring machine breaks through the east side of Beacon Hill (May 2007).
Properties Above and Near the Tunnel
The blue line indicates the route for the SR 99 tunnel. The areas shaded in red indicate where monitoring will take place during tunnel construction.
Protecting Buildings
• Preconstruction surveys will document existing building g g conditions.
• Buildings along the tunnel alignment will be equipped with monitoring equipment to prevent and minimize possible settlement-related d
damage.
• WSDOT would be
responsible for any damage caused by tunnel construction work.
Crack gauge on building wall.
Soil Improvements
• Some buildings will need soil improvements or other mitigation in addition to monitoring. • WSDOT and the
contractor will identify which buildings need mitigation and the most effective method effective method. • Crews will improve soil
conditions as a preventative measure where soils are soft and the water table is high.
Protecting Buildings
Diagram of micropile walls.
Items not to scaleItems not to scale
Construction Timeline
2011 2012 2013 2014 2015 2016 2017
S. Holgate to S. King Street roadway
Tunnel portals - cut-and-cover sections, buildings Tunnel portals - utility relocation
Tunnel boring
g g y
South end viaduct demolition
On/off-ramp construction Central waterfront viaduct demolition
Tunnel open to drivers
• Working together.
What is Construction Partnering?
g g
• Building relationships.
• Understanding the needs of the other parties’ and a philosophy of teamwork.
• Committing to cooperation and communication.
A ttit d f d ill d t t
• An attitude of goodwill and trust. • Sharing risks with a "win-win-win"
attitude.
• Total project costs were
d d b 10 t
Construction Partnering Benefits
reduced by 10 percent. • Profitability increased by 25
percent.
• Overall project completion time was reduced by 20 percent.
• Schedule changes were
Partnering workshops should be attended by all project personnel with decision making authority, including:
Construction Partnering Workshops
• Owner representatives.
• Consulting engineer/architect/design firm representatives. • Contractors.
• Major sub-contractors. • Major suppliers.
• Major municipality representatives. • Environmental officials.
• Safety officials.
Disputes Review Board
• Assist in the resolution of disputes between
WSDOT d th d i b ild
WSDOT and the design-builder.
• Three person board of independent experts. • Utilize when standard dispute resolution is
unsuccessful and prior to the filing of a claim. • Provide nonbinding recommendationsProvide nonbinding recommendations
designed to expose the disputing parties to an independent view.
Website:
l
k
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t
Questions or Comments
www.alaskanwayviaduct.org
Email:
[email protected]
Hotline:
1 888 AWV LINE
1-888-AWV-LINE
Back Pocket
SR 99 Tunnel Video
Elements to Consider in Mega Project Delivery
• Public involvement
• Environmental process
• Funding
WSDOT Design-Build Policy Management
State Construction Engineer
Design-Build Policy Team
WSDOT/AGC/ACEC T WSDOT/AGC/ACEC Team
Design-Build Work Groups
Keeping People and Goods Moving During
Construction
• Roadway improvements: SR 519 and Spokane Street Viaduct FourthRoadway improvements: SR 519 and Spokane Street Viaduct Fourth Avenue off-ramp.
• Transit investments: Added bus service and strategies to encourage transit, carpools and vanpools.
• System reliability: New electronic and travel time signs on I-5; and new electronic message signs on SR 99 and other routes to downtown.
South Holgate to South King Viaduct
Replacement
Existing
South Holgate to South King Viaduct
Replacement
Building the New SR 99 Roadway
Public process
Construction Bypass – Looking South
Transit Routes During the SR 99 Closure
Southbound Northbound
Electronic Message Board Locations
• Metro is making route and sched le changes to maintain
Keeping Transit Moving During Construction
schedule changes to maintain reliable service during
construction.
• In October, 92 trips will have been added to the SR 99 corridor since 2010.
• During the nine-day closure, 11 g y bus routes that currently operate on SR 99 will be rerouted through SODO.
• More information is available on King County Metro’s website.
How to Get Around During the SR 99 Closure
• Carpool, vanpool or vanshare. • Take the bus water taxi light rail • Take the bus, water taxi, light rail,
train or bike to work. • Work from home.
• Adjust your work schedule.
• Use alternate routes where possible. • Plan for delays and added travel time.
The West Seattle water taxi
• Listen to radio traffic reports and use electronic message boards to get up-to-the minute information.
• Delay or reschedule discretionary trips.
The West Seattle water taxi.
Nine-Day SR 99 Closure: Oct. 21-31
7:30 p m Friday Oct 21 through 5 a m Monday Oct 31 • 7:30 p.m. Friday, Oct. 21 through 5 a.m. Monday, Oct. 31. • Southbound SR 99
• Between the Battery Street Tunnel and West Seattle Bridge closed around-the-clock .
• Northbound SR 99:
• Between the West Seattle Bridge and S. Royal Brougham Way closed around-the-clock.y
• Between the S. Royal Brougham Way on-ramp and the
Battery Street Tunnel open Monday through Friday from 5 a.m. to 7 p.m., and for special events at CenturyLink Field.
Reduced Speed Limit Zones on SR 99
Upcoming Tunnel Construction
• Order the tunnel boring machine.
• Mobilize crews and equipment on construction site. • Begin to relocate utilities in south and north portal areas. • Begin settlement mitigation work for buildings and structures
at the south end.
B ild l h it f b i hi
• Build launch pit for boring machine.
Advisory Committee on Tolling
• The committee will make advisory recommendations on strategies
Electronic tolling at Tacoma Narrows Bridge.
for:
oTolling the SR 99 tunnel;
oMinimizing traffic diversion from the tunnel due to tolling; and
oMitigating traffic diversion effects on city streets and I-5. y • Any recommendations will need to
be implemented by the State, City of Seattle, Port of Seattle, and/or King County.
O S t 19 th S ttl Cit C il fi d 15 itt
Advisory Committee on Tolling
• On Sept. 19 the Seattle City Council confirmed 15 committee members.
• five selected by City Council • five selected by Mayor • five selected by WSDOT
• First meeting in November. Meetings will be open to the public. • Initial recommendations due December 2012
• Initial recommendations due December 2012.
• Committee will work until up to one year after tolling begins.
Committee Members
The City Council appointed: 1. Charley Royer WSDOT appointed: 1. Maud Daudon 2. Henry Yates 3. Bob Davidson 4. Rob Johnson 5. Phil Fujii 2. Sung Yang 3. Claudia Balducci 4. Kurt Beckett 5. Rick Bender
The Mayor appointed:
1 A G d hild 1. Anne Goodchild 2. Marcus Charles 3. Sharon Maeda 4. Peg Staehli 5. Tessa Greegor
Seattle Tunnel Partners
Barcelona Line 9 Metro Extension Near La Sagrada Familia
Successful Delivery of Bored Tunnels
Examples of tunnel excavation
• 4th Elbe River, Germany: 1.6 miles, 46.6’ diameter
• Madrid M30, Spain: Two 1.3 mile bores, 50’ diameter
p
in urban areas with similar tunnel diameters:
• Shanghai Yangtze River, China: Two 4.6 mile bores,
Shield Grouting
Grouting During Tunneling
Cutting Face
Muck
Chamber Shield Liner Shield Grouting
Tail Grouting
Shield Grouting
Tail Grouting
Tunnel Liner Panels
SR 99 Tunnel
• Ten panels per ring. • 9,273 linear feet of tunnel. • Ring width 6.53 feet.
• Number of Rings:1,420.
• Total number of panels:14,200. • Each panel is 18.2 feet by 6.53 feet by 2 feet (9 cubic yards per feet by 2 feet (9 cubic yards per panel).
• Approximately125,000 cubic
yards.
• Compressive strength at 56 days, 7,000 psi with five percent
Precast Interior Structure
• Interior structure
cast-in-SR 99 Tunnel
place/precast per design-builder.
• Roadway slabs (2,200 each).
• Wall panels with barriers (4,400 each).
• Egress walkways (2,200 each).
each).
• 72,000 cubic yards of concrete for the interior structure.
• Compressive strength at 56 days, 4,000 psi with five percent microsilica.
Settlement Monitoring
• WSDOT developed settlementWSDOT developed settlement criteria for contractor.
• Buildings will be equipped with real-time monitoring devices.
• Monitoring buildings and
ki ith t
working with property owners will help prevent and minimize settlement-related damage.
Installation of vibration and tilt instruments in the basement of a building.
Subsurface Property Rights
WSDOT will purchase subsurface • WSDOT will purchase subsurface
parcels for the SR 99 tunnel. • Purchase process:
• Appraise change in property’s fair market value.
• Present offer to purchase with copy of appraisal report copy of appraisal report.
• Negotiate purchase agreements.
Subsurface acquisition area
Items not to scale
State Project Delivery
State Projects Budget
($ in millions) ($ in millions)
SR 99 Tunnel Project $1,960.7 million SR 99 S. Holgate Street to S. King Street Project $394.8 million Central Waterfront Viaduct Removal and New Alaskan
Way
$290 million Central Waterfront Construction Mitigation $30 million
Program Management $75 million
Other Moving Forward Projects $187 2 million Other Moving Forward Projects $187.2 million Prior Environmental Impact Statements, Right of Way and
Design Costs
$163.7 million Total $3,101.4
City of Seattle Projects Project Budget ($ in millions)
AWV Program Portion ($ in millions)
City Project Delivery
($ in millions)
Elliott Bay Seawall Project $310-390 million $310-390 million Mercer Corridor Project
- Mercer East
- Mercer West and Parking Program
$164 million $116 million
$50 million $116 million S. Spokane Street Viaduct Widening Project $163 million* $30 million Waterfront Seattle (Central Waterfront Public
Spaces and Streets)
$123 million $123 million
p )
First Avenue Streetcar (Evaluated as Part of the Transit Master Plan)
-
-Public Utility Relocation (AWV-related projects) $239 million $239 million
Total $1,115-1,195 $868-948
* WSDOT contributed $50 million to the Spokane Street Viaduct project as part of construction mitigation for the south end viaduct replacement.
County and Port Project Delivery
King County Projects
Construction Transit Service (S. Holgate to S. King Street)
$32 million Transit Investments (SR 99 tunnel) $190 million
Port of Seattle
South Portal Design
Construction Coordination Goals
• No surprises. • Identify potential conflicts. • Maintain public trust.• Agencies continue to work together.
• Coordinate work to minimize impacts to the public.
• Keep users (bicycles, pedestrians, transit, freight, drivers) moving. • Maintain business and resident
access.
Ongoing Construction Outreach
• Door to door outreach and weeklyemails to project neighbors. • Weekly construction updates at
Maintenance of Traffic meetings. • Regular contact with residents
and businesses in Pioneer Square, SODO/Duwamish and West Seattle.
• Provide updates to neighbors with iti i t
sensitive equipment. • News releases and media
availabilities.
• Daily website updates.
• Real-time transit alerts via email
and text message. Program staff talk with members of the community at a public meeting. 81
Realigned SR 99 On- and Off-Ramps
SR 99 southbound off‐ramp
SR 99 northbound on‐ramp
