Item No.        8e_supp
Date of Meeting      April 27, 2021
S. 188th Street Tunnel
Design Authorization

Project Budget and Schedule
Shared Port/City of SeaTac facility
Expanded scope and budget to
include life safety systems
Original Budget: $ 6,200,000
Revised Budget: $24,500,000
Key Schedule Milestones:
Design Start Q3 2021
Construction Start Q2 2023
In-Use Date Q2 2024
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Project Scope
Scope Items:
Structural (crack sealing/spall repair)
Civil (sidewalk/pedestrian barrier,
signage)
Electrical (lighting, power, emergency
power)
Mechanical (ventilation, fire
suppression)
Communication and Special Systems
(fire detection/alarm, carbon
monoxide monitoring, security,
egress/traffic management)
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Existing Facility Conditions


Egress Doorway          Fire Alarm Station              Railing                 Fire Hydrant


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Cone of Certainty

We are here

Lessons Learned from Previous Projects
Past Lessons Learned                  Current Project Application
Engage 3rd Party Commissioning during design to    Included in budget and design phase schedule
determine Commissioning requirements
Review sales tax exemption opportunities with      Identified as opportunity to obtain approval for
transportation projects                              sales tax exemption




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Project Risks
Risk            Description      Probability   Impact     Mitigation Plan
City of SeaTac/ Puget  City of SeaTac or PSRFA        High        Medium   Use ILA Pre-Application
Sound Regional Fire   request scope changes                                Checklist process to
Authority (PSRFA)                                                           manage scope
Fiber Connection      Additional fiber capacity       High        Medium   Define communication
may be required than                                requirements; F&I and
available                                                ICT defining existing
pathways
Fire Analysis           Taxiway A/B Fire                High           Low      Coordinate with Taxiway
Analysis may add                                    A/B team to track
signage or other scope                                progress
Taxiway A/B          Taxiway A/B may modify       Low        Medium   Coordinate with Taxiway
scope to support future                               A/B team to identify
compatibility                                           requirements

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