PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      6e 
ACTION ITEM 
Date of Meeting    October 22, 2013 
DATE:    October 16, 2013 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:   Michael Ehl, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Program Management Group 
SUBJECT:  NorthSTAR Concourse C Vertical Circulation Project (CIP #C800547) 
Amount of This Request:       $16,145,000   Source of Funds:  Airport Development
Fund, Existing
Est. Total Project Cost:         $19,300,000 
Bonds, and Future
Revenue Bonds 
Est. State and Local Taxes:       $1,094,800 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to: (1) advertise for bids and
execute a major construction contract; (2) execute a tenant reimbursement agreement with
Alaska Air Group for Port's portion of construction under the Airport's AV-2 Policy; and (3) use
Port crews to provide construction services for the Concourse C Vertical Circulation Project at
Seattle-Tacoma International Airport in an amount not to exceed $16,145,000.  The total 
estimated project cost is $19,300,000. 
SYNOPSIS 
This project is a component of the North Sea-Tac Airport Renovation (NorthSTAR) program.
The purpose of this project is to install exterior walkways to improve passenger circulation and
safety, enhance customer service, and improve operational efficiency at three locations on
Concourse C. The new walkways replace  existing stairs used for ground enplaning/deplaning
with covered, weather protected, bi-directional sloped walkways and elevators, which will result
in a safer path of travel. Completing this project also allows more efficient use of Concourse C
by regional carriers and will better support future passenger growth. Sustainable materials and
energy efficient elevators will be utilized. This project was included in the 2013-2017 capital
budget and plan of finance. 
Alaska Air Group (AAG) concurs with the scope, schedule, and budget for this project in
accordance with the NorthSTAR Program Letter of Understanding dated April 5, 2012. New
interior hold rooms and ground level covered walkways to the aircraft will be provided by AAG 
as a tenant improvement project at their cost to complement the new circulation cores. AAG will
also incorporate sustainable materials into their project.  A cost sharing agreement is being

Template revised May 30, 2013.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 2 of 8 
negotiated with AAG where the Port is sharing in portions of the costs incurred by AAG for
constructing temporary passenger walkways to access aircraft during construction and for
permanent directional signage in the walkways. 
BACKGROUND 
The Concourse C Vertical Circulation Project is one project within the NorthSTAR program.
The project consolidates all AAG regional aircraft operations at Concourse C in preparation and
support of the future renovation of the North Satellite. Currently, AAG's regional aircraft are
located on Concourse C and at the northwest end of the North Satellite. Concourse C is currently
configured for regional aircraft at Gates C2, C10, C12, C14 and C16. Gate C2 uses exterior stairs
and a single hydraulic elevator from the concourse for ground loading/unloading of passengers.
Gates C10, C12, C14 and C16 are configured using passenger loading bridges for mainline
passenger jets and exterior stairs for regional aircraft. The proposed project will improve the
safety of the vertical circulation and provide for new vertical circulation cores to the regional
aircraft at each of these gates. 
The project will be performed using a combination of a major works contract and Port crews.
Port Construction Services crews will perform the removal of the Port-owned passenger loading
bridges at C10, C12, C14 and C16, the relocation of electric ground service equipment (EGSE) 
charging stations, and any incidental regulated materials management. The removal of the C16
loading bridge was not in the original scope, but the loading bridge becomes inoperable due to
the installation of the ground level walkway at the gate. AAG has requested the Port remove the
loading bridge. It will be decided later whether to surplus and sell or store this loading bridge for
refurbishment and re-use. Surplus of the loading bridge is not  part of this project or
authorization. 
The Port vertical cores and the AAG's ground level walkways will be constructed concurrently
by their respective contractors. Due to the complex phasing associated with the construction of
both projects, temporary passenger walkways are required. Since these temporary walkways will
be physically located adjacent to the AAG ground level walkways, the Port has agreed to have
AAG's contractor install and reconfigure them as needed during construction. The Port has
agreed to compensate AAG for a portion of the costs of these temporary walkways based on the
impacts to AAG caused by the project. Further, the Port has agreed to reimburse AAG for a
portion of the signage in the Port vertical cores since the main component of the signage will be
airline flight-related information with Port directional signs incorporated into the AAG sign. 
PROJECT JUSTIFICATION AND DETAILS 
The current Concourse C regional operation utilizes exterior stairs with inadequate elevator
capacity. This configuration creates a safety concern for passengers that carry luggage down the
stairways. Due to the need to utilize stairs, use of the elevator is higher than typical, especially
for mobility-impaired passengers. The elevator is small, limited to just one wheelchair with an
attendant, and has reached the end of its useful life. As a result, the existing arrangements do not
promote passenger safety and customer service and do not achieve operational efficiency for the

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 3 of 8 
airline. Further, the current configuration of the gates and aircraft do not permit further
consolidation of regional aircraft operations on Concourse C. 
The project will enhance customer service and safety by providing new exterior, weatherprotected
walkways with larger elevators, improving passenger circulation and safety between
the aircraft and concourse level, and improve airline operational efficiency. The covered 1:20
sloped walkways with elevator(s) will provide a higher level of service with improved safety to
passengers than the existing stairs and single elevator at Gate C2. The slope of walkways is less
steep than typical 1:12 ramps, thus encouraging use by passengers and minimizing lines/waiting
time at the elevator(s). The walkways will also be low maintenance. The new elevators will be
non-hydraulic and energy efficient, providing faster and more reliable service than the current
hydraulic elevator, enhancing passenger circulation capacity and improving service for mobilitychallenged
passengers. 
Project Objectives 
Upgrade the Concourse C facilities for regional operations consistent with the
NorthSTAR program projections. 
Provide safer access to the aircraft ground level by providing weather protected sloped
walkways and elevators. 
Improve customer service and safety by providing new vertical circulation cores
between the concourse and ground level for access to/from regional aircraft. 
Improve efficiency of the regional operations through consolidation of regional aircraft
on Concourse C. 
Complete the project in the needed time frame to facilitate the schedule for the other
NorthSTAR program improvements. 
Scope of Work 
Three sets of 1:20 sloped weather-protected exterior walkways from concourse to
ground level at Gates C2, C10-12, and C14 on Concourse C. 
Machine-room-less elevators at each gate location; 2 at C2 and 1 each at C10-12 and
C14, for a total of four new elevators. 
Steel frame structure with concrete slab over metal decking. 
Glass side panels and translucent roofing weather enclosures. 
Relocation of the EGSE charging stations at C2 impacted by the sloped walkways and
the AAG ground level walkways. 
Demolition of existing exterior stairs where applicable, interior hydraulic elevator C2 at
Gate C2, and removal of passenger loading bridges at Gate C10, C12, C14, and C16. 
Schedule 
Commission Authorization to Advertise Construction         October 2013 
Construction Start                                  March 2014 
Construction Complete                            March 2015

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 4 of 8 
The construction completion date was extended five months compared to the completion date in
the November 2012 Commission design authorization. This delay is due to additional time
required to revise the vertical circulation core footprints due to utility conflicts and to address
construction phasing challenges due to the confined ramp space and to maintain airline
operations during construction. 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary              Capital     Expense   Total Project 
Original Budget                     $19,300,000          $0   $19,300,000 
Budget changes                      -$775,000     $775,000         $0 
Revised budget                     $18,525,000     $775,000   $19,300,000 
Previous Authorizations                 $3,155,000          $0    $3,155,000 
Current request for authorization           $15,3705,000      $775,000    $16,145,000 
Total Authorizations, including this request    $18,525,000      $775,000    $19,300,000 
Remaining budget to be authorized               $0          $0          $0 
Total Estimated Project Cost             $18,525,000     $775,000   $19,300,000 
Project Cost Breakdown                     This Request       Total Project 
Construction                              $11,599,200        $11,515,200 
Tenant Reimbursement                       $300,000         $300,000 
Construction Management                    $1,606,000        $1,946,000 
Design                                  ($418,700)         $1,386,300 
Project Management                         $660,400        $1,550,000
Permitting                                   $94,800          $244,800 
Art Program and Scope Reserve                  $433,500          $613,800 
State & Local Taxes (estimated)                  $1,094,800         $1,094,800 
Expense Items                             $775,000          $775,000 
Total                                     $16,145,000         $19,300,000 

Budget Status and Source of Funds 
The Concourse C Vertical Circulation Project CIP #C800547 was included in the 2013  2017
capital budget and plan of finance with a budget of $19.3 million. The expense elements of the
project include the relocation of EGSE charging stations at gate C2 and the removal and storage
of the passenger loading bridges at gates C14 and C16. These costs are included in the 2014-
operating budget. The funding sources for this project will include the Airport Development
Fund, existing bond revenues, and future revenue bonds.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 5 of 8 
Financial Analysis and Summary 
CIP Category             NorthSTAR - Terminal Improvements 
Project Type              Major Construction 
Risk adjusted discount rate     N/A 
Key risk factors             N/A 
Project cost for analysis        $19,300,000 
Business Unit (BU)          Terminal Building 
Effect on business performance  NOI after depreciation will increase 
IRR/NPV 
CPE Impact             The 2014 operating costs will increase CPE by $.03. The
capital costs will increase CPE by $0.08 in 2015, but no
change to business plan forecast as this project was
included. 
Lifecycle Cost and Savings 
Through the utilization of 1:20 sloped walkways versus escalators for the primary means of
access/egress; the additional yearly escalator maintenance cost of $100,000 per year will be
avoided when considering the long-term maintenance costs associated with escalators as the
alternative. The six escalators that would have been added would have been an additional
$100,000 per year total for all six at current rates (approximately $1,500 per escalator per
month). Elevators for the mobility-impaired passengers are required. 
The new elevators will add a net of $66,000 to the maintenance cost per year. This is the net
result of four traction elevators being added, and one hydraulic elevator being removed. This
addition would still be required for either option to accommodate mobility-impaired passengers
and carts not suitable for escalators. Most important, if walkways are installed, vertical
circulation will not be impeded by escalator accidents, power failure, or maintenance downtime
thus providing unimpeded customer service reliability. 
We will also be removing four passenger-loading bridges at C10, C12, C14, and C16 as a result
of this project. However, the reduced maintenance costs by removing these passenger loading
bridges will be re-deployed to support the bridges added to the Port's responsibility as a result of
the Airline Realignment program, new gate locations such as gate B1, and to support other
additional bridges that transition to Port ownership in the future at no net savings in this area. 
STRATEGIES AND OBJECTIVES 
The project supports the Century Agenda goal of meeting the region's air transportation needs at
Sea-Tac Airport for the next 25 years. The upgrade of the vertical circulation between the
concourse and aircraft ground levels through provision of weather protected gently sloped
walkways and elevators will enhance the customer service experience compared to the current
access/egress via stairs and limited elevator access. Further, the upgraded vertical circulation will
better support future passenger growth for regional air service passengers. In addition,

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 6 of 8 
completion of this project will facilitate further improvements at the North Satellite as part of the
NorthSTAR program. 
TRIPLE BOTTOM LINE 
Economic Development 
This project will promote air service development through provision of more efficient
access/egress between the concourse and aircraft, increasing customer service, and allows our
business partners to expand their operations. 
Environmental Responsibility 
This project will include energy efficient elevator equipment, LED lighting systems, recycling of
demolished materials, recycled and/or regional materials for the structure, low-emitting
materials, other sustainable materials and products relative to indoor environmental quality. 
Community Benefits 
The Office of Social Responsibility has established a 6% goal for utilization of Small
Contractors and Suppliers for the major construction project in accordance with the small
business resolution 3618. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1) - Do Nothing: The current use of stairs and restricted elevator access at Gate C2
would remain as is. Passenger circulation, customer service, and safety would not improve and
these gates would be inefficient operationally. Nothing would be done to facilitate the
expansion/upgrade of Concourse C operations in this area. This would not meet the intent of the
Letter of Understanding between the Port and AAG, nor meet the program's vision, goals and
objectives to enhance customer experience from curb to seat. Therefore, AAG does not support
this alternative. This alternative is not recommended. 
Alternative 2) - Vertical Circulation Cores with 1:12 Ramps and Elevator(s): This alternative
provides for steeper 1:12 sloped ramps and elevator(s) at each of the three gate locations. The
steeper ramps will require persons in wheelchairs to be assisted by airline personnel, losing an 
opportunity to lower airline personnel costs, and makes the ramps uninviting to mobilitychallenged
passengers. This approach results in increased use of the elevators that increases wait
times/lines at the elevator(s) and reduces passenger loading/unloading efficiency. The smaller
building footprint of the 1:12 ramp structure does potentially reduce the capital cost by 10% and
has a less but undefined potential impact on Alaska's regional aircraft operations. This
alternative does not meet the intent of the Letter of Understanding between the Port and AAG, in
that the steeper slope does not fully meet the program's vision, goals and objectives to enhance
customer experience from curb to seat. Therefore, AAG does not support this alternative. This
alternative is not recommended.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 7 of 8 
Alternative 3) - Vertical Circulation Cores with Escalators and Elevator(s): This alternative
includes vertical circulation cores with two escalators at each of the three gate locations instead
of walkways, as well as including elevator(s) as in the above alternatives. The escalators provide
a smaller building footprint than the walkway option, resulting in a lower capital cost of
approximately $3 million and less impact on aircraft ramp space, however, the escalators do not
accommodate mobility-impaired passengers. The long-term maintenance costs of the escalators
over their 25-year life results in a higher lifecycle cost of approximately $2 million more than
constructing walkways. Further, the reliability of semi-exterior escalators is typically less than
interior units, resulting in more downtime and use of the stairs by passengers. The life cycle cost
of this alternative does not fully meet the intent of the Letter of Understanding between the Port
and AAG, although the escalators do meet the program's vision, goals and objectives to enhance
customer experience from curb to seat. Therefore, AAG does not support this alternative. This
alternative is not recommended. 
Alternative 4) - Vertical Circulation Cores with 1:20 Walkways and Elevator(s): This alternative
provides the best combination of customer service, improved facilities, and additional capacity
for future airline growth. The gently-sloped, 1:20 bi-directional walkways and elevator(s) at the
three gate locations encourage efficient passenger access and flows between the concourse and
ground levels, facilitating aircraft loading and unloading to improve customer service objectives.
The slope of the 1:20 walkways provides easy access for passengers, encouraging use of the
walkways and minimizing wait times/lines at the elevators. The walkways will be constructed of
materials requiring a minimal level of maintenance, which offsets the higher capital cost
associated with the larger building footprint when compared to escalators. This alternative meets
the intent of the Letter of Understanding between the Port and AAG and the program's vision,
goals and objectives to enhance customer experience from curb to seat. Therefore, AAG supports
this alternative. This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
Project Site Rendering 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
September 24, 2013  NorthSTAR Program status update. 
June 25, 2013 NorthSTAR Program status update. 
April 9, 2013  The Commission authorized the Chief Executive Officer to enter into a
project labor agreement covering the NorthSTAR program's five major construction
projects. 
March 26, 2013 NorthSTAR Program status update. 
November 6, 2012  the Commission authorized the design for the 1:20 sloped walkways
and elevator(s) at Gates C2, C10-12, and C14 on Concourse C. 
June 26, 2012  The Commission received a briefing on the status of the Airline
Realignment Program and budget restructuring in association with the NorthSTAR
Program.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
October 16, 2013 
Page 8 of 8 
April 4, 2012  Authorizations for the North Sea-Tac Airport Renovations program for:
1)  preliminary  project  funding;  2)  execution  of  consulting  contracts  for
design/construction support services and project management services; and 3) use of Port
crews and consultants to conduct regulated materials management surveys and field
support services for preliminary project planning tasks.