PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      4h 
ACTION ITEM 
Date of Meeting      July 14, 2015 
DATE:    July 7, 2015 
TO:      Ted Fick, Chief Executive Officer 
FROM:   Michael Ehl, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  S4 and S6 International Corridor Connector (CIP #C800662) 
Amount of This Request:         $457,000   Source of Funds:   Airport Development
Fund 
Est. Total Project Cost:          $5,307,000 
Est. State and Local Taxes:        $312,000 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to increase the budget for the
S4 and S6 International Corridor Connector Project (CIP #C800662) to address increased
asbestos abatement costs, the additional cost to retain the full use of Gate S5 and the use of Port
forces. The amount of this request is $457,000 for a total estimated project cost of $5,307,000. 
SYNOPSIS 
This project was conceived to increase international wide body gate capacity at the South
Satellite in order to meet growing demand. Now that construction is underway, increased
asbestos abatement costs require additional funding in order to complete the project as planned.
Further, the retention of an additional narrow body gate has presented us with an opportunity to
help manage the overall growth in traffic for a relatively low investment. 
BACKGROUND 
On February 25, 2015, the Port Commission authorized both the design and construction of this
project. Its primary objective was to reconfigure two existing gates currently used for domestic,
narrow-body aircraft operations only (Gates S4 and S6) and connect them to the Airport's
current international arrivals facility by extending the International Corridor at the South
Satellite. One existing domestic, narrow-body aircraft gate was to have been deactivated (Gate
S5) allowing Gates S4 and S6 to be configured to accept international, wide-body aircraft
operations. 
During design, existing site conditions precluded using the conceptual approach developed
during project definition to connect the two gates to the International Corridor using a
prefabricated external corridor system without exceeding the project budget. When it was

Template revised May 30, 2013.

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
July 7, 2015 
Page 2 of 5 
discovered that the original concept would require nearly twice the budget, the project team
determined that the same objective could be completed with an interior corridor within the 
authorized construction budget. This change resulted in an additional $165,000 in asbestos
abatement during construction and that overrun is now limiting the ability to complete the project
as scoped. 
When this project was conceived, the growth in international traffic outstripped the Airport's
international wide body gate capacity. Since its authorization, overall Airport growth has
increased demand for narrow body gates as well. Further review of gating options at the South
Satellite have shown that retaining Gate S5 as a narrow body gate will provide the opportunity to
meet the increased demand for narrow body domestic gates for both remain overnight and
morning operations as well as meet the demand for mid-day peak wide body gates by providing a
"two for one" two narrow body and one wide body configuration for Gates S4, S5, and S6. 
PROJECT JUSTIFICATION AND DETAILS 
Due to developments during design as described above, the project increased the amount of
asbestos abatement. This cost can no longer be absorbed in the project budget and still complete
the entire project scope. The  budget overrun for the increased asbestos abatement totals
$165,000. This amount will be needed to complete the project scope as authorized. To otherwise
remain within the project budget, scope would have to be reduced. This is described more fully
in the alternatives section below. 
Retaining the Gate S5 narrow body position now, for an additional project cost of $292,000, 
retains a terminal connected gate for parking overnight and off mid-day peak operations. This
gate would be provided with the full utilities normally provided, including ground power and PC
Air. In comparison, to add this gate back in the future would cost approximately $2,000,000 for
the new bridge and utilities. Gate S5 would also be connected to the International Corridor and
therefore all 13 gates at the South Satellite would be connected to international arrivals for the
first time. The PLB at Gate S5, though it would be retained today and satisfy the increased
demand for narrow body gates, is in need of replacement due to its age and size. A future project
would replace it for a cost of approximately $1,200,000. 
Project Objectives 
The original objectives of this project are: 
To provide increased gating options for international aircraft operations at the Airport. 
To minimize or eliminate hold time for arriving international aircraft while they await
access to an appropriate gate position. 
To minimize the need for remote hardstand or split operations. 
Scope of Work 
Extend the international corridor (IC) at the South Satellite to connect Gate S4, S5 and
S6 using an exterior walkway and interior corridor

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
July 7, 2015 
Page 3 of 5 
Furnish and install a new passenger loading bridge (PLB) and fixed walkway at Gate
S4 that will connect to both the newly extended IC and the concourse levels 
Install additional electrical and PC Air utility feeds to Gate S6 to provide necessary
additional aircraft power and conditioned air for a widebody aircraft at that gate 
Reconfigure aircraft parking at Gates S4, S5, and S6 to accommodate a mix of narrow
body and widebody aircraft positions 
Schedule 
The original project schedule had called for beneficial occupancy in June 2015. Design took
longer than planned. Construction is now underway and beneficial occupancy is anticipated by
the end of September 2015. 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary              Capital     Expense   Total Project 
Original Budget                      $4,800,000      $50,000    $4,850,000 
Budget increase                        $292,000     $165,000     $457,000 
Revised Budget                     $5,092,000     $215,000    $5,307,000 
Previous Authorizations                 $4,800,000      $50,000    $4,850,000 
Current request for authorization              $292,000      $165,000      $457,000 
Total Authorizations, including this request     $5,092,000      $215,000    $5,307,000 
Remaining budget to be authorized               $0          $0          $0 
Total Estimated Project Cost              $5,092,000     $215,000    $5,307,000 
Project Cost Breakdown                    This Request       Total Project 
Design                                   $85,000           $813,000 
Construction                              $351,000          $4,163,000 
State & Local Taxes (estimated)                   $21,000          $331,000 
Total                                      $457,000         $5,307,000 
Budget Status and Source of Funds 
This project was included in the 2015-2019 Capital Budget and Plan of Finance with a budget of
$4,800,000. The capital budget increase of $292,000 will be transferred from the Aeronautical
Allowance CIP (C800404), resulting in no net change to the Airport capital budget. The Funding
source will be the Airport Development Fund. The increased expense costs will be absorbed in
the 2015 operating budget.

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
July 7, 2015 
Page 4 of 5 
Financial Analysis and Summary 
CIP Category             Renewal/Enhancement 
Project Type              Renewal/Replacement 
Risk adjusted discount rate     N/A 
Key risk factors             N/A 
Project cost for analysis        $5,307,000 
Business Unit (BU)          Terminal Building 
Effect on business performance  NOI after depreciation will decrease 
IRR/NPV             N/A 
CPE Impact             $0.01 in 2015 
STRATEGIES AND OBJECTIVES 
This project supports the Port's Century Agenda objectives of making Seattle-Tacoma
International Air the West Coast 'Gateway of Choice' for international travel and of meeting the
region's air transportation needs at the Airport for the next 25 years by providing critically
needed international and domestic gate capacity. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1)  Project remains within existing budget. The project is completed with a
reduced scope by eliminating the widebody PC Air unit for Gate S6 and corridor Wi-Fi 
improvements to remain within the existing budget. The project is not changed to retain a
functional Gate S5. 
Additional Cost: $0 
Pros: 
No additional cost 
Cons: 
Lost opportunity to retain a narrow body gate at Gate S5 
Gate S6 PC Air unit cannot fully service a widebody aircraft, requiring the use of the
aircraft's auxiliary power unit (APU), consuming fuel and adding exhaust to the air. 
No corridor Wi-Fi. This will limit the ability of arriving international passengers making
use of the new Customs and Border Protection mobile app for uploading of required
Customs documents and data. 
This is not the recommended alternative. 
Alternative 2)  Project budget is increased $165,000 and Gate S5 is retained as-is. The
project is completed with a widebody PC Air unit for Gate S6 and corridor Wi-Fi improvements. 
Gate S5 is not deactivated and its PLB is retained. 
Additional Cost: $165,000

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
July 7, 2015 
Page 5 of 5 
Pros: 
Corridor Wi-Fi is available for passengers use of the new Customs and Border Protection
mobile app for uploading of required Customs documents and data 
PC Air unit is at the correct capacity for Gate S6 widebody aircraft 
Retain the narrow body gate at Gate S5 
Cons: 
Requires a separate Ground Power Unit (GPU) at Gates S5 and S6 and/or use of APU for
aircraft electrical power. 
Requires a separate PC Air Unit at Gate S5 or the use of APU for aircraft conditioned air. 
Cannot board or deplane narrow body aircraft at Gates S5 and S6 simultaneously due to
single gate door only at S6 which severely limits overnight parking and morning use. 
This is not the recommended alternative. 
Alternative 3)  Project budget is increased $457,000 and Gate S5 is retained with full
utilities and access. The project is completed with a widebody PC Air unit for Gate S6 and
corridor Wi-Fi improvements. Gate S5 is not deactivated, its PLB is retained, and it is provided
with full utilities including PC Air and ground power. 
Additional Cost: $457,000 
Pros: 
Corridor Wi-Fi is available for passengers use of the new Customs and Border Protection
mobile app for uploading of required Customs documents and data 
PC Air unit is at the correct capacity for Gate S6 widebody aircraft 
An additional narrow body gate at Gate S5, with full utilities and access 
Cons: 
At $457,000, this alternative has the highest cost of the three alternatives 
This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
None 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
February 25, 2014  The Commission authorized design and construction of this
project.