PORT OF SEATTLE 
MEMORANDUM 

COMMISSION AGENDA             Item No.      6c 
Date of Meeting     July 27, 2010 
DATE:    July 12, 2010 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:    Michael Ehl, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT: Passenger Loading Bridges at Seattle-Tacoma International Airport (CIP #
C800105).
This Request: $1,663,000              Source of Funds: Airport Development Fund 
& Future Bonds
Total Project Budget: $6,000,000          Jobs Created: 16 
Sales Tax Paid: $201,000 
ACTION REQUESTED: 
Request Port Commission authorization for the Chief Executive Officer to (1) prepare design
documents; execute and amend service agreements; execute and award purchasing contracts; 
perform contract administration; (2) authorize Port Construction Services (PCS) to self perform
work; (3) purchase airline-owned passenger loading bridges and (4) replace aging and inflexible
loading bridges at Seattle-Tacoma International Airport (Airport) in support of the Passenger
Loading Bridge Project (CIP # C800105).
SYNOPSIS: 
This request will continue the Airport's program to replace passenger loading bridges that have
reached the end of their useful life and potentially purchase airline-owned passenger loading
bridges to provide flexibility in airline gate assignments. It will allow installation of standardized
loading bridges at up to four (4) various gates, and/or purchase of airline-owned bridges. 
Loading bridges will be removed and replaced based on maintenance and operational needs.
This request of $1,663,000, when added to prior authorizations, increases the total authorized
amount to $6,000,000. 
BACKGROUND: 
With the execution of the current Signatory Lease and Operating Agreement with the airlines,
the Airport has been converting from long-term leased gates and airline-owned passenger
loading bridges to preferential and common use gates with Airport-owned passenger loading

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
July 12, 2010 
Page 2 of 6 
bridges. This conversion provides flexibility in assigning and scheduling airlines onto gates, and
can yield greater gate utilization. Of the 74 aircraft gates with passenger loading bridges, the
Airport currently owns and maintains 52. Of these, 48 are manufactured by John Bean
Technologies Corporation Jetway Systems (JBT). The Airport is standardizing to passenger
loading bridges manufactured by JBT, and the necessary competitive waiver will be executed by
the delegate of the CEO. 
In 2006, a project was initiated to acquire gate-related assets including passenger loading bridges
from airlines, and to replace existing aging Airport-owned passenger loading bridges at various
gates. 
Changes in airline gate assignments may present the opportunity for the Airport to purchase 
airline-owned passenger loading bridges to eliminate conflict between airline ownership and
airline use. In addition, Maintenance has a prioritized list of passenger loading bridges to be
replaced. Current and future airline gate assignments, along with the current age and
maintenance cost will dictate the priority. Specifically, the South Satellite has a number of
bridges to be replaced due to increased demand of international airline operations. These bridges
will be evaluated to provide the highest flexibility to accommodate different aircraft types.
Sole source standardization of passenger loading bridges is in the Airport's best interest since
maintenance and airline staff will only need to be trained on one system. This will simplify
maintenance and parts inventory and promote consistent and safe operations of the bridges.
Airlines prefer the JBT manufacturer because all of their staff is currently trained on this system. 
The current loading bridge replacement authorizations have been under spent. The cost savings
can be attributed to the current market condition, increased bidder participation, pre-purchasing
the equipment, using PCS crews and utilization of small works contracts, and the removal of the
project labor agreement, which has increased competition among smaller contractors. The result 
is an overall cost savings and unspent authority. 
PROJECT DESCRIPTION/SCOPE OF WORK: 
Project Statement: 
This project will replace existing passenger loading bridges with new standardized bridges that
are managed and maintained by the Airport. 
Project Objectives: 
The intent of this project is to replace passenger loading bridges that have reached their useful
life, and incrementally further the Airport's vision to optimize gate assignment flexibility with
Airport-owned passenger loading bridges, which can be utilized by any air carrier. This project
will improve customer service by providing new or renovated facilities and correcting code
deficiencies.

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
July 12, 2010 
Page 3 of 6 
Scope of Work: 
This project will replace old passenger loading bridges at various gates. It will include
demolition, abatement and removal/surplus of the existing loading bridges, design and
installation of a modified rotunda column foundation, and procurement and installation of new
passenger loading bridges and associated equipment. In some cases, excavation and new
footings may be required and perhaps even shifting of the positions for the passenger loading
bridge installations. Each loading bridge is its own project and separate asset.
In evaluating best project delivery method, the Central Procurement Office and Aviation Project
Management have determined that each passenger loading bridge should be its own independent
project. This will allow for the best flexibility for airlines, gate utilization, and construction.
The current plan is to procure the equipment, issue small works contracts, and have PCS self
perform work. Expense funding for asbestos abatement will be included in the Operating Budget
request, if necessary. 
In lieu of bridge replacement, funding may be utilized for purchase of existing airline-owned
passenger loading bridges, to further Airport flexibility in accommodating revised gate
assignments. 
STRATEGIC OBJECTIVES: 
Ensure Airport and Seaport Vitality 
The project provides enhanced reliability and performance for critical gate equipment in 
significant areas of the Airport, which facilitates use of the Airport by the traveling public. 
Exhibit Environmental Stewardship through Our Actions 
This project is consistent with the Port's goal of improving the long-term sustainability of its
facilities and operations by replacing equipment that has reached the end of its useful life. This
project supports and encourages Airport environmental initiatives. This project has a generally
positive effect on the environment to the extent that the gate equipment is old and outdated and
will be replaced with more energy efficient equipment. 
FINANCIAL IMPLICATIONS: 
Budget/Authorization Summary 
Original Budget                       $ 6,000,000 
Budget Increase                       $ 0 
Revised Budget                      $ 6,000,000 
Previous Authorizations                  $ 4,337,000

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
July 12, 2010 
Page 4 of 6 
Budget Spent to date                    $ 3,100,000 
Unused Authorization                  $ 1,237,000 
Current request for Authorization            $ 1,663,000 
Total current Authorization plus unused       $ 2,900,000 
Authorization 
Total Authorizations, including this request     $ 6,000,000 
Remaining budget to be authorized           $ 0 

This Request 
Unused budget
Project Cost Breakdown              plus Current    Total Project 
Construction costs                     $ 2,124,000      $ 4,301,000 
Sales tax                                $ 201,000        $ 474,000 
Outside professional services                 $ 275,000       $ 472,000 
Aviation PMG and other soft costs             $ 300,000       $ 753,000 
Total                                $ 2,900,000      $ 6,000,000 
Operating Budget Implications 
Lifecycle Maintenance Responsibilities estimated @ 20 years per bridge 
Annual Avg. Maintenance Cost  Per Bridge                   $ 35,000 
Adding bridges above the 52 currently maintained (does not pertain to replacement
bridges) will require additional Maintenance staff (next 1-5 additional bridges will
require a two (2) person mechanical maintenance crew and one (1) additional
electrician).
Source of Funds 
This project is included in the 2010-2014 capital budget and plan of finance under CIP #
C800105. Funding will be provided by the Airport Development Fund. 
Financial Analysis 
Renewal/Enhancement 
CIP Category 
Project Type              Renewal/Enhancement 
Risk adjusted Discount rate     Not Applicable 
Key risk factors             Not Applicable 
Project cost for analysis        $1,663,000 
Business Unit (BU)          Air Terminal

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
July 12, 2010 
Page 5 of 6 
Effect on business performance  Costs will be recovered through rates and charges 
IRR/NPV             Not applicable 
CPE Impact             Increase $0.01 in 2012 but no change compared to
business plan forecast, as this project was included. 
ECONOMIC IMPACTS: 
This project does not create any incremental economic impacts; it primarily helps preserve
existing business activities at the Airport.
ENVIRONMENTAL SUSTAINABILITY/COMMUNITY BENEFITS: 
New passenger loading bridges feature variable-frequency alternating current drives that are
more energy efficient than the old direct current motor drives of the passenger loading bridges
they replace. Also, new passenger loading bridges utilize more energy efficient digital
programmable logic controllers. 
This project will remove passenger loading bridges that may contain asbestos and lead paint.
TRIPLE BOTTOM LINE SUMMARY: 
This purchase of passenger loading bridges will require an initial capital investment for the new
passenger loading bridges, but will result in decreased operations and maintenance costs at the
various gate locations. The new equipment will provide reduction in trouble calls and use less
energy. It also improves customer service at these gate locations and provides expansion
opportunities for growth. This action supports Airport operations, which benefits the regional
economy and traveling public. This project helps the environment by reducing energy
consumption by providing energy efficient equipment. 
PROJECT SCHEDULE: 
Passenger Loading Bridges Purchase Order Issued      August 2010 
Complete Design                        January 2011 
Start Construction                         February 2011 
In-use Date for two bridges*                    May 2011 
In-use Date for one bridge*                    December 2011 
In-use Date for one bridge*                    February 2012 
Project Completion                        March 2012 
* Bridges may be substituted for purchasing airline-owned passenger loading bridges.

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
July 12, 2010 
Page 6 of 6 
ALTERNATIVES CONSIDERED/RECOMMENDED ACTION: 
Alternative 1: Procure up to four New Loading Bridges and Install up to four New Loading
Bridges Manufactured by JBT. This alternative provides new equipment with full warranties.
This alternative will help ensure continuous operation of these Airport gates. Depending upon
the situation, purchase of an airline bridge, rather than procuring one, may be the most effective
way to accommodate flexibility in airline gate assignments. This is the recommended
alternative. 
Alternative 2: Do Nothing. This alternative essentially allows the existing gate equipment to run
to failure. At failure these gate positions would encounter an unplanned closure and would be
unusable until one of the other alternatives is implemented. This alternative would result in
unutilized passenger gates and could impact airlines. This is not the recommended alternative. 
Alternative 3: Prolong the Life of Existing Passenger Loading Bridges. Several major
components, such as drive gears, need to be replaced. Hinges, floor panels and stairs are rusted
out and would need to be replaced before they become a safety hazard. Increasingly, part
replacement requires complete fabrication as parts are becoming harder to find. This could result
in long and unanticipated gate closures, impacting airline operations. This is not the
recommended alternative. 
Alternative 4: Procure New Loading Bridges from other manufacturers. This option might
result in a lower first cost for the bridge equipment due to a competitive procurement. However,
other costs will be higher due to the lack of standardization. These include increased airline
costs due to additional airline staff re-training for unfamiliar equipment in order to maintain 
consistent and safe operations, increased parts inventory, and additional maintenance staff
training. This is not the recommended alternative. 
PREVIOUS COMMISSION ACTION: 
On October 14, 2008, the Commission authorized $1,917,000 to design, purchase, and install
two aircraft passenger loading bridges and associated equipment. 
On July 24, 2007, the Commission authorized the expenditure of $2,420,000 for the purchase
and installation of three passenger loading bridges and associated equipment.