COMMISSION 
AGENDA MEMORANDUM                        Item No.        8e 
ACTION ITEM                            Date of Meeting     November 8, 2022 

DATE:     October 31, 2022 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Laurel Dunphy, Direction, Aviation Operations 
Eileen Francisco, Director, Aviation Project Management Group 
SUBJECT:  Delta A12A Jet Bridge Tenant Reimbursement Agreement (TRA) (CIP C801160) 
Amount of this request:               $2,432,000 
Reimbursement amount:            $9,627,000 
Total estimated project cost:         $11,770,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) increase the authorized total
project budget by $2,432,000, and (2) increase the Tenant Reimbursement Agreement (TRA)
budget from $7,245,000 to $9,627,000, and non-tenant reimbursement budget from $2,093,000 
to $2,143,000. This results in a total estimated project cost of $11,770,000. 
EXECUTIVE SUMMARY 
The A12A Jet Bridge project is a Tenant Reimbursable Agreement (TRA) project funded by the
Port and delivered by Delta Air Lines. The project adds an additional narrow body gate position
at gate A12 and relocates hold-room casework at gates A12 – A14. Supply chain disruptions have
increased costs and extended lead times for materials included in this project such as glazing and
curtain wall systems. US Customs and Border Patrol also mandated the addition of a new glazed
partition wall to separate arriving and departing passengers from international and domestic
flights. This sterile corridor modification was not identified at the time of the original funding
authorization request.  The contractor must also work around other projects occurring in the
same area at the same time which adds costs for multiple phases and mobilizations. 
JUSTIFICATION 
If delivered, this project will: 
1)  Add a narrow body gate position at Gate A12. 
2)  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 Passenger Loading Bridge (PLB). 

Template revised January 10, 2019.

             COMMISSION AGENDA – Action Item No. 8e                                  Page 2 of 6 
Meeting Date: November 8, 2022 
3)  Create the ability to serve an additional narrow-body aircraft with a contact gate or load
a single wide-body aircraft with dual PLBs. 
4)  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 TRA also commits Delta to use commercially reasonable efforts through its contractors and
subcontractors to satisfy the Diversity in Contracting goals measured as a percentage of the total
cost of the Eligible Improvements. The Delta TRA team along with the Port of Seattle’s Diversity
in Contracting Department have established a 14% WMBE goal for the project. 
DETAILS 
This project represents one of the last opportunities 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 was designed and if approved, will 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 widebody
aircraft.  The additional loading bridge will also provide the ability to load a single widebody
aircraft with dual PLBs (dual door boarding). 
Delta has completed the design portion of project through their design-builder and costs for all
elements have been estimated, resulting in an overall project cost increase of $2,432,000. Drivers
for cost increases include the following: 
• General requirements to extended overhead for staff to manage the longer duration of
the project. ($870,000). 
• Remobilization costs (3 mobilizations vs. 1 in original plan) ($275,000). 
• Labor premium for glazing (exterior and sterile corridor) pushing later in the year
($96,000). 
• Exterior curtainwall ($635,000). 
• Extended PLB stair landing for engine cowling clearance to facilitate dual door boarding 
($60,000). 
• Scope assumptions and clarifications included in the Guaranteed Maximum Price 
proposal to Delta from their Design-Builder ($496,000). 
Scope of Work 
Provide a new configuration for gates A12A and A12B with exterior and interior modifications. 
Exterior Modifications: 
(1)   Dual PLBs (A12A) with fixed walkways 
(2)   Furnish and install new fixed walkway at A12B and extended corridor at A12A 
(3)   Relocate of existing A12 PLB to A12B and install new extended corridor 

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

             COMMISSION AGENDA – Action Item No. 8e                                  Page 3 of 6 
Meeting Date: November 8, 2022 
(4)   Ancillary work to achieve functioning PLBs (i.e., PCA, GPU, potable water, SafeDock,
pavement markings) 
Interior Modifications: 
(1)   Install IAF sterile corridor gate portal 
(2)   Construct additional wall system per CBP requirement (added scope) 
(3)   Reposition boarding and customer service podiums 
(4)   Ancillary work to achieve functioning holdrooms (i.e., signage, information display
stations, etc.) 
Schedule 
Delays in the project schedule have occurred as a result of the inability to secure stable pricing
for various limited components, long-lead times, and new CBP requirements. These schedule
delays have resulted in a shift to the A12A project construction window, causing an overlap with
the 2023 Airfield Improvement Program (AIP) project work if schedules were not revised. 
Scheduling and phasing of the 2023 AIP is very complex and the sequencing in place is critical to
the success of that project. To mitigate these impacts, a new phased approach to complete the 
A12A work has been developed that eliminates the impact but results in a longer overall project
schedule, with multiple phases. 
Phase 1 – Exterior work (November 2022 – January 2023) 
• Civil work (footings and foundation, PLB fixed walkways, PLBs, paving, etc.). 
Phase 2 – Interior work (June 2023 – August 2023) 
• Building and interior work A12B podium and casework. This work would complete the
exterior building penetration, A12B podium and casework. 
Phase 3 – Interior work (inside IAF sterile corridor) (September 2023 – October 2023) 
• Demising wall construction 
• Mechanical, electrical, plumbing and EP, HVAC modification for the separated space 
• Access control and security camera integration 
Activity 
Commission design authorization               2022 Quarter 2 
Design start                                       2022 Quarter 3 
Commission construction authorization          2022 Quarter 4 
Construction start                                2022 Quarter 4 
In-use date                                       2023 Quarter 4 


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

             COMMISSION AGENDA – Action Item No. 8e                                  Page 4 of 6 
Meeting Date: November 8, 2022 
Cost Breakdown                                     This Request           Total Project 
Design                                                           $0             $1,465,000 
Construction                                             $2,432,000            $10,305,000 
Total                                                         $2,432,000             $11,770,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1 – Do not phase the project. Delay the start of construction until after the 2023 AIP
work is complete. 
Cost Implications: $250,000 – $350,000 (estimated additional escalation and GC costs, total
project cost $12,120,000) 
Pros: 
(1)   Allows the work to be completed in a single phase, eliminating multiple contractor
mobilizations. 
(2)   Reduces the overall schedule for the individual project. 
Cons: 
(1)   Delays the delivery of an additional contact gate on A Concourse until Q1 of 2024 
(2)   Extends the period of time when gate A12 is out of service. Does not allow concurrent
work with the 2023 AIP project. 
(3)   Increases the risk of project cost increase due to continued escalation and the risk of
uncertain market conditions. Does not allow pricing to be locked in now. 
This is not the recommended alternative. 
Alternative 2 – Cancel the project and in lieu of adding a second bridge use A11B as a non-gated
parking only position during non-peak periods. 
Cost Implications: $2,000,000 - $2,500,000 in expense costs (inclusive of Passenger Loading
Bridge procurement) 
Pros: 
(1)      Additional capital funds are not expended. 
Cons: 
(1)   Does not create an additional narrow-body aircraft passenger boarding gate. 
(2)   Design costs and long lead items already in procurement will be expensed. 
(3)   Does not allow dual loading bridge capability for wide-body aircraft on Concourse A. 
(4)   Incurs an expense cost that would provide no direct benefit. 
This is not the recommended alternative. 


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

             COMMISSION AGENDA – Action Item No. 8e                                  Page 5 of 6 
Meeting Date: November 8, 2022 
Alternative 3 – Provide the additional funding to proceed with the project as originally proposed
to add a new passenger boarding gate at Gate A12A to accommodate an additional narrow-body
aircraft contact gate. Delta would continue to perform this work under a revised authorized TRA. 
Cost Implications: $2,432,000 (new additional cost), $11,770,000 (new total cost). 
Pros: 
(1)      Delivers on the project goals of providing an additional contact gate on Concourse A. 
(2)      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. 
(3)      The phased approach aligns with the 2023 Airfield AIP program, eliminating a
schedule overlap and reduces the risk of negatively impacting that project’s schedule. 
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. 
(2)      Increases capital costs expended. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                 $8,653,000        $685,000      $9,338,000 
Current change                                 $2,432,000              $0      $2,432,000 
Revised estimate                                11,085,000        $685,000     $11,770,000 
AUTHORIZATION 
Previous authorizations                           8,653,000        $685,000      $9,338,000 
Current request for authorization                $2,432,000               $0      $2,432,000 
Total authorizations, including this request      $11,085,000        $685,000     $11,770,000 
Remaining amount to be authorized                    $0             $0             $0 
Annual Budget Status and Source of Funds 
The project is included in the 2022-2026 capital budget and plan of finance with a budget of
$8,653,000. The capital budget increase of $2,432,000 was transferred from the Aeronautical
Allowance CIP C800753 resulting in no net change to the Airport capital budget. This project was
presented to the airlines on October 13, 2022 and Majority in Interest ballot is due on November
14, 2022. 


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

             COMMISSION AGENDA – Action Item No. 8e                                  Page 6 of 6 
Meeting Date: November 8, 2022 
Financial Analysis and Summary 
Project cost for analysis              $11,770,000 
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                       $0.03 in 2024 
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. 
ATTACHMENTS TO THIS REQUEST 
(1)      Presentation 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
June 22, 2021 – The Commission authorized 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) 








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