Item No.         10b_supp
Date of Meeting    September 28, 2021
Widen Arrivals Roadways
Design Authorization Increase
and Contract Amendment

Project Scope
Scope Items:
Provide an additional two lanes for a total of six lanes from S 170th Street
into the Departures and Arrivals curbsides and Main Garage
Relocation of utility infrastructure systems to support widening
Relocate the rental car bus curb to the north
Demolish the bridge from Departures drive to the Main Garage
Complete seismic retrofit of north portal of Service Tunnel
Replacement of power and water utility infrastructure systems that are past
their useful life
2

Location
Reconfigure from
four to five lanes
Rental Car
Bus Curb

Widen from
Arrivals      Departures      Air Cargo           four to six lanes                                                       S. 170
Drive         Drive          Road                                                                            St. th

Lane to
GTC
N
Note: Utility corridor included
in exhibit, but not included in
project scope.
Lane to
Parking                                                                                                                                           3

Justification
Advance this region as a leading tourism destination and business gateway
Original roadway system designed to support overall
activity level of 25 million annual passengers (MAP)
In 2019 (51.8 MAP) significant roadway congestion
and queueing occurred during peak periods
With return of airport activity levels congestion and
queueing has returned during peak periods
Queueing could reach I-5/I-405 interchange
regularly during summer months in the near-term
4

Justification
Be the greenest and most energy efficient Port in North America
Meeting or exceeding agency requirements for storm water
Provides basic roadway capacity and access necessary to support ground
transportation strategies under evaluation
Reduce environmental impact
Advance transportation modes and programs to foster social equity and
customer choice


5

Current Project Status
Completed 30% design
Completed State Environmental Policy Act (SEPA) checklist and issued
determination of non-significance
Requested Airline approval through Majority-In-Interest vote



6

Resolution of Previous Risks
Airport Utilities Master Plan
Utility Corridor
Not included with Widen Arrivals Roadways Project
Designing improvements to be forward compatible
Utility infrastructure system expansion
Not included with Widen Arrivals Roadways Project (outside limits)
Replacement of aging utility infrastructure systems
Portion included within Widen Arrivals Roadways Project
7

Necessary Scope Changes
Overall project budget increased to $79.3 million
Previous Budget                                                      $50,000,000
Roadway Realignment for future construction                    $18,000,000
Replace Aged Utility Infrastructure Systems                        $3,000,000
Operational/Customer Scope Enhancements                      $3,000,000
Other Construction Costs (traffic control, etc.)                     $5,300,000
Revised Budget                                                       $79,300,000

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Project Schedule
Project will be delivered through two phases:
Early Work  Bridge Demolition
Design Complete: Q4 2021
Construction Start: Q2 2022
In-Use Date: Q3 2022
Main Contract
Design Complete: Q4 2022
Construction Start: Q2 2023
In-Use Date: Q4 2025
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Cone of Certainty

We are here




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Project Risks
Risk                  Description               Probability   Impact         Mitigation Plan
Fuel Farm    If no further action letter from the DOE,          M          M     Working with Environmental to
Monitoring   existing wells may have to be relocated at                            decommission as many wells as
Wells        an expense to the project.                                           possible.
FAA Fiber     No impacts anticipated to existing FAA fiber        L            H      Pothole FAA fiber to confirm
but will be working around it.                                            location.
Tax Rule      Project assumed it was eligible for sales tax        L            M      Submitted determination
171         exemption.                                                 request to DOR to confirm.
Access Fees  Port considering access fees and may              L           M      Work though the change
require additional scope to support.                                     process if needed.
Design Risks  Project precedes Commission consideration        H           M      Track projects and assess
of SAMP NTP and (if approved) project                                 changes as they develop.
design.

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