COMMISSION 
AGENDA MEMORANDUM                        Item No.          8e 
ACTION ITEM                            Date of Meeting       June 22, 2021 

DATE:     June 14, 2021 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Laurel Dunphy, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Project Management 
SUBJECT:  A12A Jet Bridge Tenant Reimbursement Agreement (TRA) (CIP #C801160) 
Amount of this request:               $9,288,000 
Reimbursement amount:            $7,245,000 
Total estimated project cost:          $9,338,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director  to  (1) execute a Tenant
Reimbursement Agreement in the amount of $7,245,000 with Delta Air Lines Inc. for both design
and construction of a new passenger boarding gate at Gate A12A at Seattle-Tacoma International
Airport and (2) expend $2,093,000 of non-tenant reimbursement Port costs associated with this
project. The total project cost is $9,338,000. (CIP #C801160) 
EXECUTIVE SUMMARY 
In 2019, Delta Air Lines, Inc., (Delta) pursued a feasibility study at Concourse A Gate A12 to
improve the aircraft parking layout implemented by the International Arrivals Facility (IAF) 
project. Delta's concept-level design presented in the study concluded a gate configuration that
could accommodate two narrow-body aircraft gates (A12A and A12B) or one wide-body aircraft
gate with dual passenger loading bridge (PLB) capability was feasible. Although the project
creates a completely new independent gate, it will require two gates to accommodate the widebody
configuration planned to support IAF flights. This additional facility flexibility will be
especially valuable during the off-peak time periods on Concourse A as loads occur to pre-COVID-
19 activity levels. 
This project will be completed using a Tenant Reimbursement Agreement (TRA) with Delta
following the Airport's AV-2 policy and includes a reimbursement for design study costs already
expended by Delta. 


Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. __8e__                              Page 2 of 6 
Meeting Date: June 22, 2021 
JUSTIFICATION 
This project proposes to implement the Gate A12A feasibility study's recommendation to: 
(1)      Improve the aircraft parking layout at Gate A12 that was implemented by the IAF
project by converting the A11B non-gated parking only position to a full contact gate
serviced by a PLB. 
(2)      Create the ability to serve an additional narrow-body aircraft with a contact gate or
load a single wide-body aircraft with dual PLBs. 
(3)      Increase the flexibility for contiguous domestic flight gate operation and minimize 
impacts to new wide-body International gates on Concourse A. 
Diversity in Contracting 
The goals and objectives of relevant policy directives have been communicated to Delta for
guidance on Project Labor Agreements, apprentice hiring, and women- and minority-owned
business enterprise (WMBE) utilization on tenant and tenant reimbursement construction
projects. 
Delta has been encouraged to set and to incorporate these goals and objectives into their bid
documents and will work with port staff and the port's Diversity in Contracting Department in
directly setting and achieving the project's WMBE aspirational goals. 
DETAILS 
This project represents the last opportunity to add a new passenger boarding gate equipped with
a PLB within the footprint of the existing airport terminal and aircraft parking ramp area. The
project scope will design and construct exterior and interior improvements for two (2) fully
functioning passenger boarding gates at Gate A12 (A12A and A12B) to provide the flexibility to
operate two narrow-body aircraft simultaneously or one wide-body aircraft. The additional
loading bridge will also provide the ability to load a single wide-body aircraft with dual PLBs. 
Although Delta has hired a designer who has provided a preliminary concept for the gate layout,
there is concern that the layout will impact the use of the adjacent Gate A11 for wide-body
aircraft. Aircraft fit testing at other gates has revealed space constraints for aircraft service
vehicle maneuvering due to space limitations found to be replicated in this project's design. A 
mock-up fit test of the proposed space limits for Gate A11 has shown the current concept is
viable. During design further refinement will be needed to address this challenge completely. 
This request is proceeding now in order to have design resources to further develop the design
and keep the project on schedule for construction completion prior to other scheduled gate
outages planned for 2022 and avoid those outages being concurrent with the construction of this
project. Delaying this request would delay this project's construction into the fall of 2022. The
project team is currently evaluating different solutions to the layout concerns but proceeding
without a fully defined layout is a risk to the project. 

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

COMMISSION AGENDA  Action Item No. __8e__                              Page 3 of 6 
Meeting Date: June 22, 2021 
Scope of Work 
Exterior scope: 
(1)      Install new PLB rotunda foundations. Relocate utilities as required.
(2)      Furnish and install fixed walkway at A12B and extended corridor at A12A. 
(3)      Relocation of existing A12 PLB to A12B and install new extended corridor. 
(4)      Furnish and install new A12A PLB including Wi-Fi access points (antennas). 
(5)      Relocate and reuse PCA (pre-conditioned air) and GPU (ground power unit) from A12
to A12B. 
(6)      Provide and install new PCA and GPU w/ new PLB at A12A to support dual PLB
configuration. 
(7)      Install new potable water cabinet for A12A and relocate existing A12 potable water
cabinet to A12B. 
(8)      Install a new SafeDock aircraft guidance system unit for A12A. 
(9)      Replace pavement markings at A12 aircraft parking area to accommodate new aircraft
layout. 
(10)    Create new building envelope penetration for A12B. Existing A12 penetration to be
used for A12A. 
Interior Scope: 
(1)      Install new entrance into IAF sterile corridor. 
(2)      Reposition gate boarding podiums and customer service podiums. 
(3)      Modify signage. 
(4)      Installation of information display systems. Project to provide mounting hardware,
power, and data connectivity. 
(5)      Relocate existing seating. 
(6)      Modify voice paging zones. 
Schedule 
Activity 
Commission design and construction           2021 Quarter 2 
authorization required for TRA execution 
Design start                                       2021 Quarter 3 
Construction start                                2022 Quarter 1 
In-use date                                       2022 Quarter 2 
Cost Breakdown                                     This Request           Total Project 
Design                                                  $1,415,000             $1,465,000 
Construction                                             $7,873,000             $7,873,000 
Total                                                         $9,288,000              $9,338,000 


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

COMMISSION AGENDA  Action Item No. __8e__                              Page 4 of 6 
Meeting Date: June 22, 2021 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Prepare and complete a Port capital project to add a new passenger boarding
gate at Gate A12A to accommodate an additional narrow-body aircraft contact gate instead of
having Delta perform this work under a TRA. 
Cost Implications: $10,600,000 
Pros: 
(1)   Does not require Delta to construct the project. 
Cons: 
(1)   Work will be primarily performed within Delta's preferentially leased gate area where
the Port would not be in the best position to control and mitigate the construction
impacts to Delta's operation. This could increase project costs and delay the schedule. 
(2)   Project would cost more than Alternative 3 due to increased Port staff time needed to
procure, manage, and oversee the execution of the construction contract. Construction
cost escalation likely due to longer design and construction procurement schedule. 
(3)   This project would need to be included in the Port's capital program requiring different
resources that would need to be found.
This is not the recommended alternative. 
Alternative 2  Don't add second loading bridge and use A11B as a non-gated parking only 
position during non-peak periods. 
Cost Implications: $0 
Pros: 
(1)   Lowest cost alternative. 
Cons: 
(1)   More operational conflicts with adjacent contact gate operations. 
(2)   Does not create an additional narrow-body aircraft passenger boarding gate. 
(3)   Does not allow dual loading bridge capability for wide-body aircraft on Concourse A. 
This is not the recommended alternative. 
Alternative 3  Add new passenger boarding gate at Gate A12A to accommodate an additional
narrow-body aircraft contact gate. Delta to perform this work under a TRA. 
Cost Implications: $9,425,000 
Pros: 
(1)   Work will be primarily performed within Delta's preferentially leased gate area putting
Delta in the best position to control and mitigate the construction impacts to their own
operation. 
(2)   Less Port staff time required to procure, manage, and oversee the execution of the
construction contract will result in a project cost lower than Alternative 1. 

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

COMMISSION AGENDA  Action Item No. __8e__                              Page 5 of 6 
Meeting Date: June 22, 2021 
Cons: 
(1)   After construction, the gate will be subject to the Port's 2023 annual gate allocation, so 
Delta's proprietary benefit could be temporary. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Expense funds are required in 2022 for the relocation of existing artwork, repositioning of existing
casework and relocating the existing A12 PLB to A12B. 
Cost Estimate/Authorization Summary              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                 $8,740,000        $685,000      $9,425,000 
Art (Transfer to Art CIP)                              ($87,000)                          ($87,000) 
Revised estimate                                $8,653,000       $685,000      $9,338,000 
AUTHORIZATION 
Previous authorizations                             $50,000               $0         $50,000 
Current request for authorization                $8,603,000        $685,000      $9,288,000 
Total authorizations, including this request       $8,653,000        $685,000      $9,338,000 
Remaining amount to be authorized                    $0             $0             $0 
Annual Budget Status and Source of Funds 
This project, CIP C801160, was not included in the 2021-2025 capital budget and plan of finance.
A budget transfer of $8,740,000 was transferred from the Aeronautical Reserve CIP (C800753)
resulting in zero net change to the Aviation capital budget. The funding source will be revenue
bonds. The expense costs would be included in the annual 2022 operating budget. 
Financial Analysis and Summary 
Project cost for analysis              $9,425,000 
Business Unit (BU)                  Gates 
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                       $.06 in 2023 
Future Revenues and Expenses (Total cost of ownership) 
The cost of this project will be included in the airline rate base, but it does not add square footage
to the overall allocation of airline gate area. Since gate revenue is assessed by square footage,
this project will reduce the lease rate per gate by adding one more allocable gate to the total
number of gates. 

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

COMMISSION AGENDA  Action Item No. __8e__                              Page 6 of 6 
Meeting Date: June 22, 2021 

ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
None 
















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