COMMISSION 
AGENDA MEMORANDUM                        Item No.          8k 
ACTION ITEM                            Date of Meeting      March 14, 2023 

DATE:     March 3, 2023 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Keri Stephens, Director AV Facilities and Capital Programs 
Eileen Francisco, Director Aviation Project Management Group 
SUBJECT:  Concourse HVAC Infrastructure Renewal and Replacement (CIP# C801265) Project
Definition 
Amount of this request:          $7,000,000 
Total estimated project cost:     $250,000,000 - $500,000,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) advertise and execute a
project specific contract for design services, (2) develop a Project Definition Document and
progress the overall design to 30%, (3) utilize Port crews for enabling work related to the
Concourse HVAC Infrastructure Renewal and Replacement Program project at the Seattle-
Tacoma International Airport. The amount being requested under this authorization is
$7,000,000. The anticipated total project cost is to be determined during project definition. 
EXECUTIVE SUMMARY 
The primary focus of the Concourse HVAC Infrastructure Renewal and Replacement Program
(CHIRRP) is the renewal and replacement of the existing heating, ventilation, and air conditioning
(HVAC) systems and the addition of smoke control or management systems within Concourses
B, C, and D. The project scope will include replacement or refurbishment of rooftop air handing
equipment and associated penthouses, removal of ramp level air handling equipment including
re-routing associated mechanical ducting, addition of smoke control and or smoke management 
infrastructure and systems, structural modifications, and emergency power upgrades. It is
anticipated this project will impact the inside of the concourses, the extent to which will be
further defined within the Project Definition Document (PDD). 
This project is necessary to correct code deficiencies that have been impacting planning efforts 
for the Airport Dining and Retail (ADR), Restroom Renovation, and Concourse Modernization
Programs.  Those  programs cannot succeed in  their planned  future development without
authorization of this scope. In addition, the project will improve life safety systems within the
airport through adding smoke control to Concourses B, C, and D. 

Template revised January 10, 2019.

             COMMISSION AGENDA – Action Item No. 8k                                   Page 2 of 6 
Meeting Date: March 14, 2023 
JUSTIFICATION 
Deficiencies in critical HVAC supply infrastructure have been identified in planning efforts for the
ADR, Restroom Renovation, and Concourse Modernization Programs.  To address immediate
facility infrastructure needs for those projects, some smaller projects such as the Concourse C
Temporary Air Handling Units (CIP#801149) have been authorized. 
The most recent major renovations of Concourses B, C, and D took place in 1990, approximately
33 years ago. HVAC equipment and infrastructure within these concourses is reaching end of
useful life and is significantly undersized. Based on the age of the HVAC systems and the present
need for greater air supply capacity arising from other capital programs, there is an urgent need
to begin renewal and replacement of these systems. 
In 2019, the Port of Seattle conducted a Peer Review associated with SEA’s approximately $4
billion Capital Improvement Program (CIP). A key finding from the review stated the importance
of combining similar or related projects into larger bundles to aid in expediting approvals,
delivery, efficiency, resource utilization, and project management. While smaller projects could
be planned reactively as needs are identified, the recommended alternative for CHIRRP is to
create a bundled HVAC upgrade project to modernize the critical components of this
infrastructure throughout Concourses B, C, and D. 
The complexity and operational impacts of this work dictates the need to start planning now to 
ensure the Project can complete upgrades prior to system failures and within the anticipated five
to ten year planned service life of the temporary equipment installed by the Concourse C
Temporary Air Handling Units project. This temporary project was required to meet current
supply air demand for ADR spaces and new restrooms but needs a permanent follow-on solution.
Supply air deficiencies have been identified in areas of Concourses B and C; if this project is not
implemented the need for temporary projects will continue. 
Concourses B, C, and D do not have existing smoke control or smoke management systems.
Smoke control and smoke management engineering overlaps directly with HVAC infrastructure 
engineering, as such combination of these elements in the same project is necessary. This largescale
renewal and replacement of HVAC systems within these concourses may be the only
opportunity for efficient improvement of life safety by implementing smoke control or smoke
management until the next major HVAC upgrade. Any new smoke control or management 
systems on Concourses B, C, and D have to operate in conjunction with existing systems in the
Central Terminal, Concourse A, and the Main Terminal. 
Opportunities for energy reduction related to modernization of the proposed HVAC equipment
and systems will be explored within the PDD effort. In addition, the project will take advantage
of efficiency in replacement of building elements which will already be impacted from the base
scope of work, such as upgrading ceiling systems, lighting, security cameras, and signage. In
replacement of lighting and lighting controls specifically, there exists another opportunity for
energy reduction which will also be explored within the PDD. 

Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 8k                                   Page 3 of 6 
Meeting Date: March 14, 2023 
This initial authorization request will support development of a PDD to finalize the scope,
schedule, budget, and project delivery method for the elements outlined above and will 
subsequently progress the project to a 30% design milestone. Replacement and renewal of these
systems within an operational airport will be highly complex. The PDD will explore critical issues
such as structural loading and seismic bracing code requirements for permanent and temporary
equipment, sequencing and phasing of  anticipated gate and occupied  space  closures,
development of a smoke control or smoke management model of the associated concourses, and
reviews of both existing and planned HVAC system capacities for the programs identified as
reliant on these systems. After the PDD is completed and concurrent with our progression to
30% design, the project will return to commission to request authorization to execute a General
Contractor, Construction Manager (GCCM) contract as well as authorization to complete the
remainder of the project design documents. 
Diversity in Contracting 
The project team in coordination with Diversity in Contracting team has set a 17% women-and
minority-owned business enterprise (WMBE) aspirational goal for the design contract for this
project. 
DETAILS 
This project includes the renewal and replacement of HVAC systems, updating necessary related
utilities, and correcting code and performance related deficiencies in Concourses B, C, and D. It
includes a budget for structural upgrades and “ceiling up” renewal of impacted building elements
such as impacted ceilings, lighting, security cameras, and signage. 
Scope of Work 
Concourse  HVAC  Infrastructure  Renewal  Replacement  Program  will  focus  on  HVAC
refurbishment/replacement, ceiling and lighting renewal/replacement, and ceiling mounted
fixtures renewal replacement. 
The scope of work will include: 
(1)    Replacement or refurbishment of existing air handlers. 
(2)    Addition of supplemental air handlers. 
(3)    Replacement of select terminal units for air distribution. 
(4)    Upsizing chilled water and hydronic heating water distribution. 
(5)    Emergency  power  system  upgrades  (panels,  distribution  gear,  and  step-down
transformers. 
(6)    Addition of active smoke control and or smoke management systems. 
(7)    Distribution ducting as required including ceiling diffusers. 
(8)    Ceiling replacement within the concourses (not including hold rooms). 
(9)    Structural seismic upgrades required by the latest building code. 
(10)  Fire sprinklers and fire riser upgrades. 
(11)  Refreshed exit signage. 

Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 8k                                   Page 4 of 6 
Meeting Date: March 14, 2023 
(12)  Column cover replacements as needed. 
(13)  Upgraded lighting to LED & new lighting control systems. 
(14)  Waste and ventilation pipe replacement where impacted. 
(15)  Ceiling mounted signage updates. 
(16)  Security camera updates. 
(17)  Demolition of abandoned conduit & utilities. 
(18)  Compliance with upcoming State of Washington Clean Buildings Performance Standard
will identify energy efficiency measures that may need to be added to CHIRRP’s scope
for implementation. 
Schedule 
Activity 
Begin Designer Procurement                   2023 Quarter 2 
PDD Start                                         2024 Quarter 1 
Design Start                                      2025 Quarter 1 
Commission 100% Design Authorization         2024 Quarter 3 
Commission Construction Authorization         2027 Quarter 2 
Construction Start                                2027 Quarter 3 
In-use date                                       2031 Quarter 3 
Cost Breakdown                          This Request                      Total Project 
Design                                      $7,000,000          $20,000,000 - $50,000,000 
Construction                                          0        $230,000,000 - $450,000,000 
Total                                           $7,000,000         $250,000,000 - $500,000,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1 – Do not renew or replace existing ageing and undersized HVAC infrastructure. 
Cost Implications: $0 
Pros: 
(1)   This is the least expensive alternative. 
Cons: 
(1)   Airport  Dining  and  Retail,  Restroom  Renovation,  and  Concourse  Modernization
Programs will not be able to proceed with some future planned work. 
(2)   Ageing infrastructure may fail resulting in the need for emergency repairs and projects
to maintain life safety. 
This is not the recommended alternative. 
Alternative 2 – Renewal and replacement of HVAC systems, updating necessary related utilities,
and correcting code related deficiencies. Include budget estimate for structural upgrades and 

Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 8k                                   Page 5 of 6 
Meeting Date: March 14, 2023 
renewal of impacted building elements such as impacted ceilings, lighting, security cameras, and
signage. Also include discretionary scope to raise concourse ceilings for passenger experience
improvement  including  demolition  of  the  abandoned  interior  roof  structures,  ceiling
replacement in unimpacted hold rooms, and complete re-design of the interior air distribution
system. 
Cost Implications: $500,000,000 - $1,000,000,000 
Pros: 
(1)   This alternative will solve air supply issues required for the Airport Dining and Retail
(ADR), Restroom Renovation, and Concourse Modernization Programs. 
(2)   This alternative includes discretionary upgrades like increasing natural light to the
concourses. 
Cons: 
(1)   This is the most expensive alternative. 
(2)   This alternative is the most invasive and will interrupt occupied use of the concourses 
significantly. 
This is not the recommended alternative. 
Alternative 3 – Renewal and replacement of HVAC systems, updating necessary related utilities,
and correcting code related deficiencies. Budget for structural upgrades and renewal of “ceiling
up” building elements already impacted by the project such as renewal of opened up ceilings, 
associated lighting, security cameras, and signage. 
Cost Implications: $250,000,000 - $500,000,000 
Pros: 
(1)   This alternative will solve air supply issues required for the Airport Dining and Retail
(ADR), Restroom Renovation, and Concourse Modernization Programs. 
(2)   This alternative takes advantage of cost-efficient upgrades to building elements that will
already be impacted by the project. 
(3)   This alternative includes budget for structural upgrades which may not be needed but 
are likely to be required. 
Cons: 
(1)   This alternative has a significant cost, although less than Alternative 2. 
(2)   This will not increase natural light to the concourses. 
This is the recommended alternative. 




Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 8k                                   Page 6 of 6 
Meeting Date: March 14, 2023 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary              Capital       Expense            Total 
COST ESTIMATE 
Original estimate                             $250,000,000 -               0   $250,000,000 - 
$500,000,000                  $500,000,000 
AUTHORIZATION 
Previous authorizations                            $200,000               0         $200,000 
Current request for authorization                $7,000,000               0       $7,000,000 
Total authorizations, including this                $7,200,000               0       $7,200,000 
request 
Remaining amount to be authorized         $242,800,000 -              0   $242,800,000 - 
$492,800,000                  $492,800,000 
Annual Budget Status and Source of Funds 
This project, C801265, was included in the 2023-2027 capital budget and plan of finance with a
budget of $255,000,000. A budget transfer from the Aeronautical Allowance C800753 would
occur when the project estimate is known. The funding sources would be the Airport
Development Fund (ADF) and revenue bonds. 
Financial Analysis and Summary 
Project cost for analysis              TBD 
Business Unit (BU)                  Terminal Building
Effect on business performance    NOI after depreciation will increase due to inclusion of
(NOI after depreciation)             capital (and operating) costs in airline rate base. 
IRR/NPV (if relevant)                N/A 
CPE Impact                       TBD 
ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
August 11, 2020 – The Commission authorized $2,000,000 for design and construction of the 
Concourse C Temporary Air Handling Units (CIP#801149) project. 
March 23,  2021 –  The Commission authorized $26,000,000 for the Post IAF Airline
Realignment (CIP#801158) project for project management and design services, GCCM
services, and a Memorandum of Agreement between the Port and United Airlines. 
April 12, 2022 – The Commission authorized an increase to the project budget for the
Concourse C Temporary Air Handling Units (CIP#801149) project in the amount of
$1,000,000. 

Template revised June 27, 2019 (Diversity in Contracting).