Item No. 7a_supp 1_
Meeting  11/2/10 .

Alaskan Way Viaduct & Seawall Replacement Program


OrganizationPort of Seattle Commission
DateNovember 2, 2010

Program Updates


Pier 48 demolition is complete.
S. Spokane Street Viaduct construction is on schedule.
East Marginal Way grade separation is on schedule for completion in
September 2011.
Mercer East project construction is underway.
SR 99 Intelligent Transportation Systems are installed and will be
activated in December.

Current Construction  Holgate to King




Crews are installing dewatering systems at several locations.

S. Holgate to S. King Street (South End)
Viaduct Replacement

Updated Holgate to King Construction Plan
3                        2010 Construction schedule
Construction to proceed in 2010
Part of schedule change
4
Staging area
2
5 6
1
7

Build new city street:               Intersection             Begin building SR 99
1                4            7
Currently underway                improvements:           detour:
Late 2010              Shorter duration
2 Rebuild Colorado Avenue S.:   5 Build bike/pedestrian path:
Currently underway                Shifted out to 2011
Begin building SR 99 southbound
3 lanes:            6 Railroad track relocation:
Shifted out to 2011
Late October 2010

Bored Tunnel Alternative
October 28: Received bids from design-build contractors.
October 29: Published the Supplemental Draft Environmental Impact
Statement for public review and comment.

2009   2010   2011   2012   2013   2014   2015   2016
Environmental process
Publish        FEIS
second SDEIS
Proposals due    Hire contractor

Preliminary design
Major construction
Bored tunnel open to drivers, central
viaduct demolition begins

Second Supplemental Draft Environmental
Impact Statement (SDEIS) Overview
2010 Second SDEIS: Primary subject is the bored tunnel
alternative.
Brings bored tunnel alternative to the same level of
analysis as previous alternatives.
Co-lead agencies identified bored tunnel alternative as
preferred alternative. Port Commission has also
endorsed the alternative.
Published for public review on Oct. 29, 2010.
Public comment period: Oct. 29  Dec. 13, 2010.

Topics Analyzed in SDEIS
Geology and soils        Hazardous materials
Air quality              Noise and vibration
Transportation          Historic/cultural/archaeological
Surface water / ground water   resources
Economics          Land use
Public involvement        Visual quality
Public services and utilities   Construction
Energy            Wildlife, fish and vegetation

Bored Tunnel Alternative (Preferred)
Key features:                        Proposed alignment
Minimizes construction disruption.
Maintains SR 99 and the efficient movement
of goods and freight which supports the local
and regional economy.
Improves safety by removing the aging
viaduct.
Reconnects neighborhoods.
Provides opportunities for new pedestrian and
bicycle connections.
Improves downtown waterfront.

Proposed South Portal
New Dearborn Intersection Option

Proposed North Portal
Curved Sixth Avenue Option

Transportation Analysis

Transportation-related effects:
Changed access points.
Changed lane configuration.
Changes in traffic volumes.
Small shifts to I-5.
More vehicles on city streets.
Similar travel times.
Early design
Comparable to existing intersection                 concept.
operations.

Tolling Analysis
SDEIS used same tolling scenarios as
2010 cost and tolling report which
determined up to $400 million in
funding could be generated.
SDEIS describes potential
environmental effects of tolling the
bored tunnel alternative.
Tolling the tunnel resulted in
undesirable traffic levels on downtown
streets and Alaskan Way.
Electronic tolling at Tacoma Narrows Bridge.
During the next several years, WSDOT
and SDOT will work together to refine
and optimize toll scenarios and
minimize diversion.

Travel Times
Travel times generally remain the same as they would with the existing
viaduct.
Travel times were also included in the 2010 cost and tolling report.
With a tolled bored tunnel, the West Seattle to downtown and
Woodland Park to downtown trips, travel times could be 3 to 4 minutes
longer.
For trips using surface Alaskan Way with a tolled bored tunnel, travel
times could be 1 to 3 minutes longer.

Next Steps for Tolling
Washington State Legislature would provide tolling authority to toll the bored tunnel.
WSDOT and SDOT will continue tolling analysis to optimize operations.
WSDOT and SDOT will convene a tolling advisory committee with participation from
King County and Port of Seattle.
2010  2011  2012  2013  2014  2015  2016  2017  2018
Environmental process

Final Environmental Impact Statement and Record of Decision
Tolling advisory committee
Analysis and toll
scenario optimization
Transportation Commission sets toll rates
Proposed bored tunnel opens, tolling begins

Construction of the Bored Tunnel
SR 99 / Alaskan Way Viaduct remains open during construction:
SR 99 detour near stadiums continues for additional two years.
Three-week SR 99 closure to connect bored tunnel.
Local street closures during portal construction.
Overall construction:
Activities 24-hours per day, seven days a week.
Additional noise and activity near portal areas.
Duration: 5.5 years.
Note: Construction assumptions could change after the contractor is hired.

Potential Effects on Freight During Construction
Keeping people and goods moving during construction:
New signals and signs warning drivers of train blockages.
Intelligent Transportation Systems.
Consideration of T-46 operations.
Potential effects during construction:
May be affected by lane closures / reductions.
Additional construction vehicles on routes used for hauling construction
materials and spoils from the south portal area.
Primary haul route for construction materials: temporary SR 99 off-ramp to
S. Atlantic Street to SR 519 (Edgar Martinez Drive S.) to First Avenue S.
Over-legal loads would travel via West Marginal Way to First Avenue S.

Economic Benefits
Keeping Alaskan Way Viaduct open during
construction will keep people and goods
moving.
The current estimate for direct, indirect and
induced jobs related to the viaduct
replacement is 3,900 jobs in 2012.
$220 million in federal funds represents
new money in the regional economy in
addition to bridge replacement funds.

Summary of Effects and Benefits
Removal of viaduct:
Protects public safety be removing
seismically vulnerable viaduct.
Opens up at least nine acres of open
space.
Enhances views and mobility from
neighborhoods including downtown,
Pioneer Square and Belltown.
Noise:
Noise decreases substantially along
the waterfront.
Water quality:
Looking south on Alaskan Way S.
Improves water quality.               at Union Street. Red brick is a
placeholder for future design.
Provides water quality treatment
where runoff is currently untreated.

Summary of Effects and Benefits
Freight
Maintains transportation system capacity and route options.
Transit
Transit priority treatments in portal areas.
Air quality:
Meeting National Ambient Air Quality Standards.
Greenhouse gas emissions:
Slightly higher levels anticipated due to future growth and power
needed to operate tunnel systems.
Neighborhoods near portals:
Increased mobility for pedestrians, bicyclists, transit and cars.
Tunnel operations building design would respect neighborhood
character.


How to comment on the SDEIS
Public comment period: Oct. 29  Dec. 13, 2010.
Provide oral statement to a court reporter at a public hearing on
Nov. 16, 17 or 18.
E-mail comments to awv2010SDEIScomments@wsdot.wa.gov.
Mail comments to:
Angela Freudenstein
Alaskan Way Viaduct Replacement Project Office
Wells Fargo Building
999 Third Ave., Suite 2424
Seattle, WA 98104-4019

Alaskan Way Viaduct and Seawall Replacement Program
Web:
www.alaskanwayviaduct.org
E-mail:
viaduct@wsdot.wa.gov
Hotline:
1-888-AWV-LINE

Back Pocket

Environmental Process
Environmental analysis is conducted and environmental
documents are published so the public and decision-makers
have sufficient information to make an informed decision.
Lead agencies analyze alternatives to determine potential
environmental effects.
Analysis helps determine potential mitigation measures to
mitigate effects.
History:
Notice of Intent published: 2001, 2003, 2005 and 2008.
2004 Draft Environmental Impact Statement (DEIS): Five
alternatives.
2006 Supplemental DEIS: Cut-and-cover tunnel and elevated
structure alternatives.

Environmental Analysis
Alaskan Way Viaduct and Seawall  Fully Studied in   Further Environmental
Replacement Program Elements     SDEIS       Review Required*
Bored tunnel and portals                X
Viaduct removal                     X
Battery Street Tunnel decommissioning       X
Mercer underpass and 6th Avenue          X
Mercer west of Fifth Avenue N.                             X
Alaskan Way surface street                              X
Transit enhancements                                X
Elliott / Western connector                                  X
Waterfront promenade/public space                         X
Elliott Bay Seawall                                       X
As part of City's Transit
First Avenue Streetcar evaluation
Master Plan
* Some analysis in the SDEIS (including transportation analysis) assumes these projects
are complete.

Central Waterfront Project
General Project Area
.I'

Central Waterfront Design / Construction Timeline
2009  2010  2011  2012  2013  2014  2015  2016  2017  2018

Design
Coordination
Central Waterfront Public
Space and Streets
Viaduct
Demolition
Seawall System
Replacement
Seawall
Preferred
Alternative
Bored Tunnel
Alternative
Bored Tunnel
Open



Design       Construction
Central Waterfront Project

Mercer East Construction Stages




28

Mercer East Stage 1 Construction




29

Completing the Vision For Two-Way
M E R C E R W E S T   Mercer St From I-5 to Elliott Ave W

WEST MERCER PLACE
TWO-WAY CONVERSION

MERCER UNDERPASS




Create a direct connection from I-5 and SR 99 to Seattle  Add a new option for freight from I-5 to Interbay
Center, Uptown, Queen Anne, and Interbay          Connect the Uptown and S Lake Union urban
Improve pedestrian and bicycle connection across SR   centers                    SDOT
30
99                                 Enhance transit access
Seattle Department of Transportation

M E R C E R W E S T     Mercer Corridor Schedule






July 28, 2010
SDOT
31
Seattle Department of Transportation

Traffic Volumes With Tolls
During the next several years, WSDOT and SDOT will work with the Port and
County and a tolling advisory committee to refine toll scenarios.
Tolling would begin when the tunnel opens.
Toll scenarios resulted in undesirable levels of diversion.
For example, with a medium to high toll, projected daily trips could shift to:
I-5: 14,000 to 15,000 vehicles.
North-south downtown city streets (west of I-5): 16,000 to 18,000
vehicles.
North-south downtown city streets (east of I-5): 10,000 to 12,000
vehicles.
Alaskan Way (North of Seneca Street): 6,000 to 7,000 vehicles.