Seattle-Tacoma International
Airport
October 22, 2019
North Terminals Utilities Upgrade Project
(NTUUP)
Item No. 8e_supp
Meeting Date: October 22, 2019
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Project location and phases
Phase one
Phase two
Existing system
Project Purpose: Provide adequate HVAC and redundancy
Phase 1: Provide adequate HVAC for NSTAR & D Concourse Annex
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• Scope
– Replace and extend the existing 45-year-old undersized steam, condensate and
chilled water supply and return piping from the Central Mechanical Plant to the
new valve room building that will be in the north east corner of the north GT lot
east of the D concourse Annex sloped walkway.
• Purpose
– Existing piping is undersized for current and future projected system loads.
– Project is required to supply adequate heating and cooling to the terminal
building and the new North Star Program
Phase 2- Provide Redundancy
• Scope
– Install steam, condensate, and chilled water supply and return piping from the
Central Terminal baggage level connection point to the new valve room building
that will be in the north east corner of the north GT lot east of the D concourse
Annex sloped walkway.
• Purpose
– Provide a fully redundant loop system
– Enable any part of the airport terminal to operate Heating, Ventilation, and Air
Conditioning (HVAC) systems while being supplied from the south or north
steam, condensate, chilled water supply and return piping.
– This level of redundancy currently exists for Concourse A, B, and the South
Satellite. Completing this project will enable airport wide HVAC system
redundancy for all concourses and satellites.
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Budget Increase
• Original Estimate based upon existing conditions at the time.
Coordination with Concourse D Annex and Baggage
Optimization project revealed significant cost increases due to
required alternate routing and addition of valve room.
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Lessons Learned
• AVPMG requiring additional site investigation earlier in design
to identify unknown conditions.
• Increased project coordination requirements to go along with
initial estimates.
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Our request
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• Commission authorization for the Executive Director to advertise and award a
construction contract for Phase 1 of the North Terminals Utilities Upgrade Project
at Seattle-Tacoma International Airport.
