PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      4c 
ACTION ITEM 
Date of Meeting     April 26, 2016 
DATE:    April 18, 2016 
TO:      Ted Fick, Chief Executive Officer 
FROM:   Dave Soike, Director, Aviation Facilities and Capital Program 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Passenger Loading Bridge Installation and Replacement at Gate C17 (CIP 800653) 
Amount of This Request:              $0   Source of     Airport
Funds:       Development Fund 
Est. Total Project Cost:           $6,250,000 
and Revenue Bonds 
Est. State and Local Taxes:         $450,000 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to add scope to (1) design the
replacement of the passenger loading bridge (PLB) at Gate C17; (2) procure 1 new PLB; and (3)
use Port crew labor and small works contractors to perform site work and complete replacement
of the PLB at Gate C17. The previously authorized budget for the original five-PLB project
covers this added scope. 
SYNOPSIS 
On March 4, 2016, Alaska Air Group (AAG) informed the Port they are replacing their entire
shorter 737-400 series aircraft with longer 737-900ER aircraft. They plan to complete this by the
end of 2017 as part of their overall aircraft fleet upgrade program. The longer aircraft will not fit
at Gate C17 as the tail protrudes into the taxi lane object free area (OFA) that protects the dual
taxi lane that exists between Concourse C and the North Satellite (NSAT). This protrusion
violates the FAA airport design standards creating a safety hazard for nearby taxiing aircraft and
makes Gate C17 less useable operationally. Alaska's increasing inability to use Gate C17 during
unprecedented growth at the airport will quickly result in an untenable situation. 
To mitigate this operational restriction the existing Port owned passenger loading bridge (PLB) 
(model A3 58'/110') must be replaced with a shorter PLB (model A3 44'/78'). The shorter PLB
allows the longer 737-900ER aircraft to park closer to the concourse building such that the tail
clears the OFA. This gate would also retain the flexibility to park a range of other narrow body
aircraft that Alaska Air Group's operations may require. This request is to replace the existing
Gate C17 PLB as quickly as possible to minimize increasing operational impacts during
upcoming construction and Alaska's inability to use this gate for many of its planes that could
also impact airport-wide operations. 

Template revised May 30, 2013.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
April 18, 2016 
Page 2 of 7 
BACKGROUND 
This is an enabling project of the North Sea-Tac Airport Renovation (NorthSTAR) Program.
The NorthSTAR program is a collaborative effort between the Port and AAG to create and
promote a user-friendly "curbto-seat" passenger experience through the integration of facility
improvements, technology, and airline services on Concourse C, D, the North Main Terminal,
North Satellite, and the north STS loop. The recently created dual taxi lane, between Concourse
C and the NSAT, is an operational enhancement in the NorthSTAR Program. 
The urgency to replace the existing PLB at C17, with a new shorter one, is scope added to the
original PLB renewal and replacement project and is driven by a combination of Alaska's
aircraft fleet upgrade program schedule, not fully visible to Port staff, and a change by AAG that 
the recently created dual taxilane was required for their operational efficiency throughout
construction of the North Satellite.
Currently, Gate C17 is restricted to the shorter series of 737 aircraft because of the recently
created dual taxi lane between Concourse C and the North Satellite (NSAT). Alaska Air Group
(AAG) is replacing 20 of their 737-400 series aircraft from their fleet mix with the longer 737-
900ER aircraft. The current PLB is an A3 58/110 having a range of 58-110 feet in length and 
suitable for the current 737-400 aircraft operating at Gate C17. Unfortunately, this PLB cannot
retract short enough to accommodate the longer replacement 737-900ER aircraft currently being
phased in by AAG. The PLB required for the longer aircraft must be a model A3 44/78 having a
range of 44-78 feet in length to allow the nose wheel to stop closer to the concourse building and 
bring the aircraft tail back in within safety parameters. 
PLBs are considered to have a service life of 25 years before major refurbishment or replacement 
is required. The current PLB was manufactured in 1987. A replacement PLB for C17 has been
included in Aviation Maintenance and Facilities & Infrastructure's current PLB Renewal and
Replacement Prioritization plan for the years 2018/19. Adding this PLB replacement fits the
intent of the original CIP and provides the opportunity to expedite a solution to an increasing
critical operational impact.  Although considered, from an engineering perspective, it is not
feasible to shorten the existing C17 PLB or another PLB that AAG currently has in storage.
AV/Maintenance and Facilities & Infrastructure Departments have requested disposal versus
refurbishing and reusing the existing PLB elsewhere. 
PROJECT JUSTIFICATION AND DETAILS 
The dual taxi lane was created in 2015 between Concourse C and the NSAT to allow 
aircraft to more efficiently move around and between Concourse C, D and NSAT, which 
resulted in restricting use to only shorter 737 series aircraft at Gate C17. 
AAG uses Gate C17 as one of their preferential gates under the airport's Standard Lease
and Operating Agreement (SLOA). 
Gate C17 is currently restricted to only shorter 737-400/700 series and Horizon's
Embraer 175 aircraft.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
April 18, 2016 
Page 3 of 7 
It was not determined until the fall of 2015 that the dual taxi lane could remain in
operation during construction of the North Satellite Renovation and Expansion project
(NSAT) and continue to restrict Gate C17. 
AAG has twenty 737-400's (119' long) to be completely phased out over 2016/17 and
replaced by longer 737-900ER (138' long) series aircraft. 
AAG will have only 12% of their 737 fleet (out of 150 737's) that will fit at Gate C17 by
the end of 2016. 
The need for Gate C17 to fit longer 737 aircraft has already become critical for AAG, as
shorter 737's are continually being phased out. 
Adding to the urgency, as construction begins in 2016 on the NSAT, Alaska's operating
positions will be impacted, putting increased demand on other aircraft positions,
including Gate C-17, which if it remains restricted to certain aircraft, further exacerbates
the impacts. 
It would also negatively impact the overall airport gating capacity by displacing AAG's
longer 737's to other gates. 
Swapping this PLB for another short PLB from another gate is not feasible as it takes two
gates out of service for an extended period of time for extensive modifications and both
gates would still retain older, out of date PLBs. 
Project Objectives 
The objectives of this project are: 
To eliminate a specific aircraft safety hazard when longer 737's are parked at Gate C17. 
To accommodate longer 737 aircraft on an expedited schedule. 
To aid in mitigating any potential gating impacts to the NSAT or to airport-wide gating
capacity. 
Scope of Work 
Remove the existing PLB and scrap. 
Design using existing design services indefinite delivery, indefinite quantity (IDIQ)
contracts. 
Purchase and installation of new PLB, and related components at Gate C17 
Any necessary structural foundation modifications, architectural, electrical, data and
mechanical infrastructure upgrades to meet new PLB standards and current code
requirements.
Utilize Port Construction Services (PCS) to perform all work associated with removal
and disposition of the exiting PLB, modifying the existing foundation if necessary,
installation of the new PLB  and construction management services  for the PLB
installation at Gate C17. 
Installation and commissioning of the new PLB and fixed walkway at C17. The PLB
will be owner provided equipment.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
April 18, 2016 
Page 4 of 7 
Electrical connection to the airport's existing central 400 HZ aircraft ground power
system. 
Reconnection to the existing pre-conditioned air system at Concourse C.
The new PLB will be connected to the Port's Facility Monitoring System so any
malfunction that shuts the bridge down, will be promptly reported to Maintenance for
faster response. 
Schedule 
Complete Design           July 2016 
Start Construction          August 2016 
Complete Construction        July 2017 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary              Capital     Expense   Total Project 
Original Budget                      $7,250,000          $0    $7,250,000 
Previous Budget transfer                 ($950,000)          $0    ($950,000) 
Previous budget changes - net Savings         $900,000      $50,000     $950,000 
Savings                          ($2,000,000)              ($2,000,000) 
Proposed increase for new scope            $1,000,000               $1,000,000 
Revised budget                      $6,200,000      $50,000    $6,250,000 
Previous Authorizations                 $7,200,000      $50,000    $7,250,000 
Current request for authorization                   0           0           0 
Total Authorizations, including this request     $7,200,000       $50,000    $7,250,000 
Remaining budget to be authorized               $0          $0          $0 
Total Estimated Project Cost              $6,200,000      $50,000    $6,250,000 
Project Cost Breakdown (Gate C17 only)     This Request and Total Project 
Design                                         $70,000 
Construction                                     $860,000 
State & Local Taxes (estimated)                         $70,000 
Total                                           $1,000,000 
Budget Status and Source of Funds 
To replace this PLB as expeditiously as possible, staff is recommending using the existing PLB
Renewal and Replacement Project (CIP # C800653). This project is included in the 2016-20 
capital budget and plan of finance with a budget of $7,200,000.  This CIP was originally
authorized by the Commission, in October 2014, for $7,250,000 to replace PLB's at Gates B6,
B8, B14, C3, and S15. That scope of work was completed recently for $5,200,000. Due to
efficiencies gained as the project progressed and risks that did not materialize, the project
returned $2,000,000 in savings to the capital allowance CIP (and $50,000 in expense funding).
This reduced the capital budget for this CIP from $7,200,000 to $5,200,000. Approximately

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
April 18, 2016 
Page 5 of 7 
$1,000,000 of these savings will be used to replace the Gate C17 PLB and transferred back into
the CIP. This brings the revised total budget for capital and expense to $6,250,000, still within
the authorized $7,250,000. The funding source will be the Airport Development Fund and
existing revenue bonds.
Financial Analysis and Summary 
CIP Category             Renewal and Enhancement 
Project Type              Renewal & Replacement 
Risk adjusted discount rate     N/A 
Key risk factors             N/A 
Project cost for analysis        $6,250,000 
Business Unit (BU)          Terminal  Passenger Loading Bridges 
Effect on business performance  NOI after depreciation will increase 
IRR/NPV             N/A 
CPE Impact             CPE $.02 in 2017 
Lifecycle Cost and Savings 
Aviation Maintenance completes regular preventive, corrective and emergency maintenance on
all Port-owned PLBs, as well as providing customer service support for operations. Aviation
Maintenance estimates a current annual cost per PLB of approximately $15,000 inclusive of all
repair, maintenance and customer support activities, including 24/7 response. Since this project
is a renewal and replacement of an existing Port owned and maintained PLB, there will be no
impact to AVM operating and maintenance costs because of this project. 
STRATEGIES AND OBJECTIVES 
The anticipated growth in domestic and international enplanements will require improving and
maintaining existing gates for all airlines. This project supports the Port's Century Agenda
objective of meeting the region's air transportation needs at Sea-Tac Airport for the next 25
years. This project also supports the Aviation Division's strategy of anticipating and meeting the
needs of our tenants, passengers, and the region's economy. 
TRIPLE BOTTOM LINE 
Economic Development 
This project replaces an outdated and inefficient PLB. This will allow the Port to provide its 
airline tenants and the public with the updated, dependable and more efficient equipment that
they need for passenger service. As our business partner, this change allows AAG to expand and
improve their operations with larger aircraft to meet their market demands.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
April 18, 2016 
Page 6 of 7 
Environmental Responsibility 
New PLBs employ the use of advanced electronics, materials and finishes that provide enhanced
energy efficiency and improved air quality through: 
Installation of Energy Star compliant equipment/components where applicable. 
Use of up to 30% pre-consumer recycled content in PLB flooring. 
Use of repurposed rubber from spent aircraft tires for PLB control cab bogies (under-cab
assemblies) 
Use of No/Low VOC (volatile organic compound) paints, adhesives and finishes
wherever possible.
Use of the most energy efficient lighting provided for this application. 
Provision for increased passive ventilation in newly manufactured PLBs over older
models. 
Community Involvement 
There will be opportunities for small businesses in that several Small Works contracts will be
utilized in order to perform the mechanical, electrical, and foundation work. The Small Works 
contracts will be for an approximate total of $100,000.
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1) Maintain status quo - This is not the recommended alternative. 
Pros: 
1)  Saves $1,000,000 in project costs. 
Cons: 
1)  The new longer 737 aircraft does not fit the current Gate C17 PLB without impacting the
dual taxi lanes thereby creating a safety hazard. 
2)  Restricting larger aircraft at Gate C17 has begun to create an operational impact that will
increase as shorter aircraft are removed from Alaska's fleet. 
3)  Negatively impacts gating capacity for AAG and the airport during NorthSTAR
construction. 
Alternative 2) Modify and shorten the existing C17 PLB. Estimated project cost is $1,000,000.
This is not the recommended alternative. 
Pros: 
1)  Reuses the existing 29-year-old PLB. 
2)  Saves expenditure on new PLB. 
Cons: 
1)  Not feasible to shorten  from an engineering perspective, has  not previously been
accomplished and is not recommended by manufacturer, JBT Jetway. 
2)  Does not save money. 
3)  Gate C17 would be inoperative for a longer period of time while PLB is modified offsite.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
April 18, 2016 
Page 7 of 7 
Alternative 3) Replace the current C17 PLB with a new, shorter PLB which allows longer 737's
to park. Estimated project cost is $1,000,000. This is the recommended alternative. 
Pros: 
1)  Optimal schedule for mitigating Gate C17 down time during replacement. 
2)  Provides best opportunity to match AAG's desire for new PLB as quickly as possible, in
terms of shortest project schedule. 
3)  PLB matches existing Port standard PLBs. 
Cons: 
1)  Existing PLB currently scheduled for replacement 2018/19. 
ATTACHMENTS TO THIS REQUEST 
None 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
October 20, 2014  The Commission authorized $7,250,000 for PLB replacement at
Gates B6, B8, B14, S15 and C3 (CIP C800653).