PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      4c 
ACTION ITEM 
Date of Meeting     August 5, 2014 
DATE:    July 29, 2014 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:   David Soike, Director, Aviation Facilities and Capital Program 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Main Terminal South Low Voltage System Upgrade (CIP #C800061)/Main
Terminal Center and North Low Voltage System Upgrade (CIP #800231) 
Amount of This Request:      $6,072,000     Source of Funds:  Airport Development
Fund and Future
Est. Total Project Cost:       $20,730,000 
Bonds 
Est. State and Local Taxes:     $1,158,000 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to (1) transfer budget and
combine the Main Terminal Center and North Low Voltage System Upgrade (CIP #C800231)
with the Main Terminal South Low Voltage System Upgrade (CIP #C800061) into a single CIP;
(2) direct staff to proceed with project management, design, and preparation of final construction
documents for the combined Main Terminal Low Voltage System Upgrade project at Seattle-
Tacoma International Airport; and (3) execute a contract for design services. The total value of 
this request is $6,072,000 of an estimated total project cost of $20,730,000. 
SYNOPSIS 
This project will replace the low voltage distribution system within the main terminal. This 
system serves power to every floor of the main terminal including ticketing, baggage claim, and
mezzanine offices. The current low voltage system is now ten years beyond the expected
lifespan. Outages are becoming more frequent with spare parts increasingly difficult to locate.
Replacement of the system will extend the system lifespan, comply with all code requirements,
increase reliability, and significantly decrease impacts of planned outages. 
The Low Voltage System Upgrade projects include identical scope items differing only in
location within the Airport. Combining the projects into a single CIP brings the similar work into
a single project and allows for consolidated design and construction efforts. A single design
effort will mitigate risks of multiple designers creating functionally identical but physically
different systems. Single construction execution will allow for greater flexibility of work in the
critical areas of the Airport that are affected. 

Template revised May 30, 2013.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 29, 2014 
Page 2 of 5 
BACKGROUND 
The Airport's medium voltage electrical distribution system and power centers (maximum
primary operating voltage levels of 5,000 to 15,000 Volts) have all been renewed and replaced
within the last decade. The next phase of the Airport's renewal and replacement program for the
electrical system is the low-voltage system (maximum operating voltage distribution levels of
120 to 600 Volts). 
Currently, portions of the existing low-voltage electrical distribution system have reached the
end of their useful operating life, raising concerns over their continued reliability. The useful
operating life of electrical equipment primarily depends on age, with 30 years being a reasonable
lifespan. Some of the equipment included in this project is well over 40 years old. Equipment
maintainability and availability of spare parts are increasing concerns with aging equipment. 
There are areas in the low-voltage electrical system where the available fault current exceeds the
current ratings for the existing equipment, thus creating operating and working condition safety
issues.  Other current safety-related code issues exist for these older installations including
dedicated equipment space, working clearances, illumination, identification, and Underwriters
Laboratory (UL) listing of all equipment. The Main Terminal Low Voltage System Upgrade
project will address all these issues in this area and bring the installation up to current standards.
Having adequate and reliable capacity in the low voltage distribution system is also critical in
supporting deployment of new technologies that can maximize facility throughput. 
This project was originally authorized by Commission in 2007 for $1,925,000 for both design
and construction for the South Main Terminal. One hundred percent design concluded in 2009.
However, as a result of the economic downturn, the project was delayed and given a lower
priority than other projects. In the ensuing years, there have been several revisions to the
electrical code standards and many projects executed that required piecemeal upgrading of
sections of the low voltage distribution system. It has since been determined the initial scope of
work authorized would not fully solve all of the known deficiencies. This current authorization
request seeks to reset the authorized amount to match a more complete scope of work. 
As a result of the delay, the previous design effort is not usable and will need to be expensed.
The total expensed will be approximately $540,000. This request will restart the design process
and complete full upgrades to the low voltage distribution in the south main terminal to meet
current codes and port standards. Design work will be performed under a  single project
procurement for design services. Further action will include authorization for construction at the
conclusion of the design process. 
PROJECT JUSTIFICATION AND DETAILS 
The work planned is the start of the renewal and replacement program for the Airport's low
voltage electrical system.  This infrastructure is critical to ticketing  and other operational
requirements for all airlines.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 29, 2014 
Page 3 of 5 
Project Objectives 
Upgrade the Main Terminal Power Center Low Voltage System by replacing equipment
at the end of its service life and equipment that is underrated for its use. 
Remedy all code compliance and working clearance issues. 
Keep maintenance and spares requirements to a minimum. 
Meet all load requirements and provide for future expansion. 
Minimize operational impact during the replacement of the electrical low-voltage
distribution system and its components. 
Scope of Work 
This project covers the renewal and replacement of low-voltage electrical distribution
switchboards, feeders, panels, and tenant metering in the Main Terminal served by the Main
Terminal Power Distribution Load Center. 
Schedule 
Airline Majority in Interest Approval      March 2014, July 2014 
Authorize Design                  August 2014 
Authorize Construction Contract        January 2016 
Advertise                       February 2016 
Construction Start                  June 2016 
Project Completion                 July 2019 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary     C800061   C800231    Combined   Expense    Total
Capital                Project 
Original Budget                   $1,925,000   $2,700,000   $4,625,000        $0   $4,625,000 
Adjust for costs charged to expense                 ($540,000)   ($540,000)    $540,000         $0 
Budget Increase                   $6,605,000   $8,950,000  $15,555,000    $550,000  $16,105,000 
Revised Budget                  $8,530,000  $11,110,000  $19,640,000  $1,090,000  $20,730,000 
Previous Authorization              $1,385,000    $150,000   $1,535,000    $540,000   $2,075,000 
Current request for authorization                             $6,072,000             $6,072,000 
Total Authorizations, including this request                           $7,607,000    $540,000    $8,147,000 
Remaining budget to be authorized                        $12,033,000    $550,000  $12,583,000 
Total Estimated Project Cost                             $19,640,000   $1,090,000  $20,730,000 
Project Cost Breakdown              This Request        Total Project 
Design Phase                        $6,072,000          $7,997,000 
Construction Phase                                     $11,575,000 
State and Local Taxes                                     $1,158,000 
Total                                 $6,072,000          $20,730,000

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 29, 2014 
Page 4 of 5 
Budget Status and Source of Funds 
The Main Terminal South Low Voltage System Upgrade #C800061 and Main Terminal Center
and North Low Voltage System Upgrade #C800231 are both included in the 2014-2018 capital
budget and plan of finance with a combined budget of $6,900,000. CIP #C800231 budget will be
transferred into #C800061. The capital budget increase of $15,555,000 was transferred from the
Aeronautical Allowance CIP (C800404) resulting in no net change to the Airport capital budget.
The expense budget includes $540,000 of prior design costs that will be written off and charged
to expense in 2014 and $550,000 in regulated material expense that will be included in the 2015
operating budget. The funding source will be the Airport Development Fund and future revenue
bonds. The Port plans to issue revenue bonds in late 2014 or early 2015 to fund a number of
projects.
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        $20,730,000 
Business Unit (BU)          Terminal 
Effect on business performance  NOI after depreciation will increase 
IRR/NPV             N/A 
CPE Impact             $0.02 in 2014 and 2015 for expense items and $.06 
beginning in 2019 for ongoing capital costs. 
Lifecycle Cost and Savings 
The existing low voltage distribution system is ten or more years beyond its 30 year life
expectancy. Repair costs have been continuously increasing as replacement parts availability has
dwindled. Renovation is expected to reduce repair costs and increase the power available and
operational availability of the system. The renovated system is expected to meet or exceed the
previous lifespan. 
STRATEGIES AND OBJECTIVES 
The Low Voltage System Upgrade will support the Century Agenda Strategic Objective of
meeting the region's air traffic needs at Seattle-Tacoma International Airport for the next 25
years by ensuring that the low voltage electrical infrastructure of the South Main Terminal will
support existing and future electrical needs with greater reliability.


COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 29, 2014 
Page 5 of 5 
TRIPLE BOTTOM LINE 
Economic Development 
This project will increase the long-term ability of the Airport to serve all the airlines and
passengers who work in and pass through the main terminal. This project increases the reliability
of the electrical system and adds additional capacity for future growth. 
Environmental Responsibility 
The project demonstrates environmental sustainability by improving existing Port assets to
extend their life and better utilize existing resources. 
Community Benefits 
This project will facilitate airline growth. Long-term vitality of the Airport benefits the regional
economy, the local environment, and nearby communities. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1)  Do Nothing. This would not address life expectancy of the aging equipment,
remedy code compliance issues, or address future growth. This is not the recommended
alternative. 
Alternative 2)  Proceed with original scope as approved in 2007. This will only partially
address the life expectancy of the Low Voltage System and will not address future growth
requirements. This alternative will require redesign to comply with current code requirements.
This is not the recommended alternative. 
Alternative 3)   Proceed with full scope. This will completely address the life expectancy of
the Low Voltage System, address all code compliance issues, and address future growth needs.
This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
MT Low Voltage Upgrade Presentation 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
June 8, 2007  Authorization for Design and Construction.