COMMISSION 
AGENDA MEMORANDUM                        Item No.          8b 
ACTION ITEM                            Date of Meeting        July 28, 2020 
DATE:     July 21, 2020 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Eileen Francisco, Acting Director Aviation Facilities and Capital Programs 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Electric Ground Support Equipment (EGSE) Charging Stations (CIP #C800335) 
Amount of this request:              $12,451,773 
Total estimated project cost:         $38,100,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) increase the project budget 
for the Electric Ground Support Equipment (EGSE) Charging Stations Project in the amount of
$7,400,000 for a revised total estimated project cost of $38,100,000; and (2) advertise and
execute a major works construction contract for the Electric Ground Support Equipment (EGSE)
Charging Stations Phase 2B Project at Seattle-Tacoma International Airport. 

EXECUTIVE SUMMARY 
This project will install a new electrical power center and electric charging infrastructure to
support the charging needs of airline electric ground support equipment (baggage tugs, belt
loaders, pushbacks). Our airlines currently use approximately 600  Ground Support Equipment
(GSE) and about half of those have been converted to electric to-date. 
When completed, the full project will reduce approximately 9,000 tons of carbon per year and
almost 400 tons per year of criteria pollutant emissions from ground support equipment. It will
also reduce airline maintenance costs, save fuel costs, and contribute to the Century Agenda
goal to "Be the greenest and most energy efficient Port in North America." Revenue will be
collected from individual Airline use via revenue metered electricity charges at the established
Port tenant kilowatt hour (kWh) rate. 
The Commission previously authorized funding necessary to complete the full-airport EGSE
design documents, as well as the first phase of construction. This request is for approval of
budget increase, and authorization for construction of Phase 2B. This project was submitted to
the airlines for a majority-in-interest (MII) vote and was approved on May 26, 2020. 

Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. _8b___                              Page 2 of 8 
Meeting Date: July 28, 2020 
The EGSE charging infrastructure project is being executed in three major phases (Phase 1,
Phase 2A, and 2B). Phase 1 (north-end) has been completed, and this request will fund the
completion of Phase 2 (south-end). The second phase of the project has incurred a seven-year
delay due to airline realignment, major projects construction, and increased duration for Airline
transition to electrified vehicles. Following an evaluation of the south satellite, the scope at that
location, which included 72 charge ports and a new power center, was removed from this EGSE
project; however, 8 charge ports will be installed at the south satellite under phase 2B.
The current approved budget is $30,700,000. The revised budget is estimated to be
$38,100,000. The budget increase of $7,400,000 is due to escalation of labor and materials
costs since the original estimate was developed eight years ago, added scope for arc flash
mitigation, design updates, an increased number of construction packages, and contractor
markup on chargers. 
BACKGROUND 
This project will help complete the vision championed by airlines and the Commission in 2010
to be the first North American airport to offer electric charging infrastructure to all operators.
Most airports have implemented electrification on an airline-by-airline basis, whereas this
project creates a harmonious system for use by all airlines. 
The project will reduce carbon and criteria pollutant emissions from ground support
equipment, reduce airline maintenance costs, save fuel costs, and contribute to the Century
Agenda goal to "Be the greenest and most energy efficient Port in North America." 
The initial project development in 2012 proposed 512 charge ports airport-wide. Phase 1
included 256 charge ports, which was completed in 2014, with support from a U.S. Department
of Energy grant. In 2014, Alaska Airlines deployed 204 electric-powered baggage tractors and
baggage belt loaders for use at their Alaska and Horizon gates. Southwest, United and Delta
also began using limited numbers of EGSE in 2015, given the growing positive response from
the airlines about the operational benefits of using electric equipment. 
In 2015-17, before Phase 2 could be implemented, several new construction projects came online
,  including  D  Concourse  Holdroom,  North  Satellite  renovations,  and  the  International
Arrivals Facility. This new complexity and changes to the apron and gates led to a delay in EGSE
installations. Phase 2A and 2B will complete the majority of the originally planned EGSE charge
points in this new, re-configured environment. 
Following an evaluation of the south satellite, the scope at that location, which included 72
charge ports and a new power center, was removed from this EGSE project. The construction
budget for this south satellite scope was $3.2M. This remaining EGSE South Satellite (SSAT) 
buildout will be addressed in the future renovations of the SSAT, thus avoiding costly rework if
installed now. The current EGSE project scope includes eight charge ports at the SSAT. The

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

COMMISSION AGENDA  Action Item No. _8b___                              Page 3 of 8 
Meeting Date: July 28, 2020 
electrical load of these eight charge ports can be installed within the existing electrical capacity, 
as they will not trigger the requirement for a new power center. 
The Aviation Project Management Group has identified the following lessons learned during the
execution of this project: 
(1) When projects are deferred, the management team will evaluate the estimated
duration of the deferral and the potential impacts to cost and schedule. The results of
this evaluation shall be reported to commission. 
(2) Projects which include scope within the Airfield Operations Area (AOA), shall include
heightened budget and schedule contingencies, which address the dynamic nature of
the AOA. 
(3) Port  purchased  equipment  can  present  challenges  for  projects  with  extended
schedules  or  deferments.  When  it  is  determined  major equipment  should  be
purchased by the Port, the selected vendor contract shall be long enough to support
the program schedule including a reasonable contingency. 

JUSTIFICATION 
Project Objectives 
Phase 2  will install EGSE Charging Stations at gates in the south half of Seattle-Tacoma
International Airport and will: 
Reduce criteria air pollutants (CO, SO2, particulate matter, etc.) by almost 200 tons per
year and carbon emissions by 4,000- to 5,000 metric tons per year 
Reduce fuel consumption 
Reduce airline maintenance costs 
Take advantage of Washington state sales tax waivers that expire in 2025 for the project
elements related to utilizing electrical power versus fossil fuel 
Diversity in Contracting 
The project staff, in coordination with the Diversity in Contracting department, have set a 7%
woman and minority-owned business enterprise (WMBE) aspirational goal for the Phase 2B
construction contract. 
Scope of Work 
Phase 1 has been completed and included Concourses C and D, Central Terminal Bagwell, and
the North Satellite, with a total of 256 charge ports. Phase 1 also included rebalancing of
electrical loads  on the existing Concourse C Power Center, and upgrade  of the  existing
Concourse D Power Center. 
To accommodate renewed growth in airline demand for EGSE, Port staff has subdivided the
current Phase 2 work into Phase 2A and Phase 2B, with a total of 138 charge ports. To meet the

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

COMMISSION AGENDA  Action Item No. _8b___                              Page 4 of 8 
Meeting Date: July 28, 2020 
immediate needs of the airlines, part of Phase 2B will be completed via small works contracts
and includes 68 EGSE charge ports across a limited number of Concourses A and B, and South
Satellite gates. Due to the limited power capacity within Concourse B, a new power center is
required prior to completion of the remaining 30 charge ports in Phase 2B. Phase 2A will install 
an additional 40 charge ports on Concourse A. 
The EGSE program currently consists of the following: 
(1)   Completed to-date $18.7M. 
a.  Phase  1,  which  installed  256  charger  ports  on  Concourses  C  and  D,  North
Satellite and Central Terminal bag well, and modifications to Concourses C and D
power centers. 
b.  Initial Phase 2 design. 
c.   Installation of 30 charge ports under Phase 2. 
d.  Charger equipment purchase for Phase 1, and part of Phase 2. 
(2)   Phase 2A - Estimated total cost in 2013 was $4.6M, and the current total cost is
estimated at $6.6M ($2M increase). 
a.  Install 40 charge ports on Concourse A. 
(3)   Phase 2B - Estimated total cost in 2013 was $7.4M, with the current total cost
estimated at $12.8M ($5.4M increase). 
a.  Install 98 charger ports on Concourses A and B and the South Satellite. 
b.  Install new Power Center at Concourse B. 
This additional budget is required due to the following: 
Description                                            Budget Impact 
Escalation of Construction Costs and Soft Costs              $6.3M 
Arc Flash Mitigation (added scope)                         $1.5M 
Design Update of the Entire Phase 2 Project                $2.1M 
Execution via Multiple Sub-phases                          $0.7M 
South Satellite Scope Reduction                           ($3.2M) 
Budget Increase Total        $7.4M 
The additional $1.5M for Arc Flash Mitigation, is required for improved safety of the Port
maintenance personnel, as well as any electrical contractor performing work on the concourse
B Power Centers. Over the past 5 years the Port has begun addressing the Arc Flash hazard
concerns on the medium- and low-voltage power distribution systems throughout SeaTac
airport. This project includes both low- and medium-voltage scope, therefore Arc Flash hazard
mitigation is required, which was unknown when the project budget was established. 
The additional $0.7M for execution of Phase 2 via multiple sub-phases requires the same
rigorous design, procurement, and construction process for a small project as a larger single
project. This scenario was not included when the project budget was established. The project

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

COMMISSION AGENDA  Action Item No. _8b___                              Page 5 of 8 
Meeting Date: July 28, 2020 
was broken into smaller projects to support airline partner needs on a timely basis, as they
were identified. 
Total EGSE Charge Port Quantities 
Project Phase                                            Charge Ports 
Phase 1, Concourses C and D, and North Satellite              256 
Phase 2 A&B, Concourses A and B, and South                 138 
Satellite 
Total          394 
Schedule 
The following schedule identifies the three remaining construction contracts: Phase 2B Small
Works; Phase 2B Major Works, and Phase 2A Major Works 
Activity 
In-use date, Phase 2B Small Works                  2020 Quarter 3 
Design Complete, Phase 2B                        2020 Quarter 3 
Construction Start, Phase 2B                        2021 Quarter 1 
In-use Date, Phase 2B                               2023 Quarter 1 
International Arrivals Facility Construction           2021 Quarter 1 
Complete 
Design Complete, Phase 2A                        2021 Quarter 3 
Construction Start, Phase 2A                        2021 Quarter 4 
In-use Date, Phase 2A                               2022 Quarter 3 
Cost Breakdown                                      This Request          Total Project 
Design                                                   $1,860,000            $9,400,000 
Construction                                              $5,540,000           $28,700,000 
Total                                                          $7,400,000            $38,100,000 





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

COMMISSION AGENDA  Action Item No. _8b___                              Page 6 of 8 
Meeting Date: July 28, 2020 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative  1   Complete  the  Small  Works  project  charger  installations  currently  in
construction. Do not proceed with the new Concourse B Power Center, or the remaining
chargers identified under Phase 2A and Phase 2B. 
Cost Implications: An estimated $2,300,000 in costs to-date will need to be expensed if this
option is pursued. 
Pros: 
(1)   No additional capital costs. 
Cons: 
(1)   Most airlines will not be able to take advantage of EGSE. 
(2)   The Port of Seattle will not be able to realize the environmental benefits of EGSE on
the remaining south half of Sea-Tac Airport. 
This is not the recommended alternative. 
Alternative 2  Complete the planned charger installations and new Concourse B Power Center
as identified for Phase 2A and Phase 2B projects. 
Cost Implications: $23,930,189 (Total Phase 2 cost) 
Pros: 
(1)   Installs 138 EGSE charge ports on Concourses A and B and the South Satellite. 
(2)   Maximizes the reduction in carbon emissions from ground service equipment. 
(3)   Allows most airlines operating out of Sea-Tac Airport to take advantage of EGSE. 
(4)   Increases the electrical power capacity on Concourse B 
Cons: 
(1)   Additional capital costs. 
This is the recommended alternative. 

FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary          Capital     Expense       Total 
COST ESTIMATE 
Original estimate                              $30,198,000   $502,000   $30,700,000 
Current change                              $7,400,000         $0    $7,400,000 
Revised estimate                            $37,598,000   $502,000   $38,100,000 
AUTHORIZATION 
Previous authorizations                       $25,348,227   $300,000   $25,648,227 
Current request for authorization             $12,249,773   $202,000   $12,451,773 
Total authorizations, including this request    $37,598,000   $502,000   $38,100,000 
Remaining amount to be authorized                   $0         $0            $0 

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

COMMISSION AGENDA  Action Item No. _8b___                              Page 7 of 8 
Meeting Date: July 28, 2020 

Annual Budget Status and Source of Funds 
This project, CIP C800335, was included in the 2020-2024 capital budget and plan of finance
with a budget of $30,198,000. A budget increase of $7,400,000 will be transferred from the
Aeronautical Reserve CIP (C800753) resulting in zero net change to the Aviation capital budget.
The funding source will be revenue bonds. 
Financial Analysis and Summary 
Project cost for analysis              $38,100,000 
Business Unit (BU)                  Gates Utilities 
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                       $.15 in 2023 
Future Revenues and Expenses (Total cost of ownership) 
Per industry data, EGSE charging equipment lifecycle is estimated between 13 and 20 years.
Having not completed a full lifecycle at this point, we are unable to confirm this but anticipate it
will fall within this range. At full build-out of the EGSE system, Aviation Maintenance O&M costs
(labor and materials) are estimated at approximately $175,000 annually, based on current costs
for Phase 1 equipment and the increase when Phase 2 is fully installed and operational. This
does not include "charging cord" repairs/replacements, which are an airline responsibility.
Revenue will be collected from individual airline use via revenue-metered electricity charges at
the established Port tenant KWh rate. 

ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 

PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
September 13, 2016  The Commission authorized $4,600,000 to (1) advertise and award a
major works construction contract for Phase 2A (Concourse A) of the Electric Ground
Support Equipment (EGSE) Charging Stations project (the anticipated cost of $4.6 million
is within the amount already authorized by the Commission); (2) utilize Port crews to
perform construction work. 
October 23, 2012 - The Commission authorized $16,200,000 to: (1) advertise and execute a
construction contract for Phase 1 of the Ground Support Equipment-Electrical Charging

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

COMMISSION AGENDA  Action Item No. _8b___                              Page 8 of 8 
Meeting Date: July 28, 2020 
Stations Project-Installation of Chargers; and (2) pre-purchase electrified ground support
equipment (EGSE) chargers for Phase 2 of the project. 
April  3,  2012  -  The  Commission  authorized  $  8,000,000  to:  (1)  prepare  full  design
documents for the Electrified Ground Support Equipment charging station Project; (2)
for PCS to install approximately 20 chargers as a demonstration project; (3) approve
budget for the EGSE overall project; and (4) contract for long lead time electrical
equipment for power center upgrades. 
September 12, 2011 - The Commissioned authorized signing no-cost contracts for EGSE
vehicles and EGSE chargers. 
May 10, 2011 - The Commission was briefed regarding progress on the EGSE project prior to
soliciting pricing for rolling stock. 
October 26, 2010 -  The Commission authorized $1,510,000 for preliminary design,
necessary contracts, and work by Port forces to begin to implement the ultimate
project; pre-purchase specialized equipment and materials through competitive bid
processes; and to authorize Port Construction Services to perform Regulated Materials
Management (RMM) investigations and self-perform necessary associated work. 
September 28, 2010 - The Commission was briefed on the 2011 capital budget that included
the EGSE projects. 
September 8, 2005 - The Commission was briefed on the benefit of changing from fossil fuel
based GSE vehicles to EGSE based vehicles at Seattle-Tacoma International Airport. 








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