PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA                      Item No.         4a 
ACTION ITEM 
Date of Meeting      November 4, 2014 
DATE:     October 27, 2014 
TO:        Theodore J. Fick, Chief Executive Officer 
FROM:    Dave Soike, Director, Aviation Facilities and Capital Program 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Domestic Piping Branch Replacement (CIP #800657) 

Amount of This Request:            $558,000    Source of Funds:   Airport Development
Fund (ADF) 
Est. Total Project Cost:              $1,950,000 
Est. State and Local Taxes:            $115,000 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to design and prepare
construction bid documents for the Domestic Piping Branch Replacement project at Seattle-
Tacoma International Airport. This authorization is for $558,000 of a total estimated project cost
of $1,950,000. 
SYNOPSIS 
This authorization would allow for the design required to replace aging domestic water pipes and
associated valves in the Airport's Main Terminal. 
BACKGROUND 
There are four domestic water piping branches and manifolds in the Main Terminal, one serving
each mechanical room (rooms 1-4).  These piping branches are approximately 43 years old.
During recent maintenance activities, the piping was disassembled. The pipes were found to be
severely corroded, with the interior of pipes and fittings nearly completely plugged with rust
deposits.  Also, many of the valves no longer function, leaving the Port vulnerable to a water
shutdown in the event of failure. 
PROJECT JUSTIFICATION AND DETAILS 
This request would authorize design work for the replacement of the water pipes prior to failure.
Water pipes corrode through age and use.  These pipes are over 40 years old and show
considerable corrosion. The disruption of domestic water pipe failure would be unacceptable to
airport operations. 

Template revised May 30, 2013.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
October 27, 2014 
Page 2 of 4 
Design will be performed internally by Port Engineering Services and existing indefinite
delivery, indefinite quantity agreements (IDIQs) for specialized design input. 
Project Objectives 
Replace existing domestic water piping between the water main in the utilidor through
the reducing stations in Mechanical Rooms 1-4. 
Vastly reduce risk of piping failure that would cause domestic water disruption to large
portions of the Airport. 
Evaluate existing pipe sizes based on current demands and planned expansions and
redesign using appropriate sizing. 
Design and integrate metering into the existing Direct Digital Control System. 
Replace existing valves that enable the Airport to shut down water in the event of an
emergency or for future work shutdowns. 
Minimize water supply disruption by performing root valve replacements overnight and
back feeding each mechanical room with water during construction to avoid outages. 
Scope of Work 
Replace four 6" and 8" domestic piping branches from the 12" main in the utilidor up
to and including the reducing stations located near the mechanical rooms in the Main
Terminal; and 
Perform necessary work to keep the domestic water system functional through the
construction period. 
Schedule 
Project Notebook Approval                                                September 2014 
Commission Authorization for Design                                       November 2014 
Design Start                                                                  November 2014 
Design Completion                                                          April 2015 
Commission Authorization for Construction                                       April 2015 
Construction                                             October 2015 through January 2016 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary                    Capital        Expense    Total Project 
Original Budget                                 $1,950,000              $0      $1,950,000 
Previous Authorizations                                  $0              $0               $0 
Current request for authorization                    $558,000               $0        $558,000 
Total Authorizations, including this request         $558,000               $0        $558,000 
Remaining budget to be authorized              $1,392,000              $0      $1,392,000 
Total Estimated Project Cost                     $1,950,000              $0      $1,950,000

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
October 27, 2014 
Page 3 of 4 
Project Cost Breakdown                               This Request           Total Project 
Design                                                  $558,000              $558,000 
Construction                                                      $0             $1,285,000 
Sales Tax                                                                          $115,000 
Budget Status and Source of Funds 
This project was included in the 2014-2018 capital budget and plan of finance with a budget of
$1,950,000. The funding source will be the Airport Development Fund. 
Financial Analysis and Summary 
CIP Category                   Renewal/Enhancement 
Project Type                     Renewal and Replacement 
Risk adjusted discount rate       N/A 
Key risk factors                   N/A 
Project cost for analysis           $1,950,000 
Business Unit (BU)               Terminal cost center 
Effect on business performance   NOI after depreciation will increase 
IRR/NPV                   N/A 
CPE Impact                   CPE will increase by $.01 in 2017. This project was
included in the business plan forecast. 
STRATEGIES AND OBJECTIVES 
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.  Maintaining our existing assets
and infrastructure is necessary to meeting this objective. 
TRIPLE BOTTOM LINE 
Economic Development 
This project will allow the Port to continue providing our Airport and concessions tenants with
uninterrupted domestic water. Completion of this project will significantly reduce the chances of
a domestic water outage, and also prevent the economic impacts of an emergency repair project
and potential costs to tenants. 
Environmental Responsibility 
This project will provide the opportunity to apply environmental sustainability principles
primarily through the use of ductile iron pipe that has a high recycled content.

COMMISSION AGENDA 
Theodore J. Fick, Chief Executive Officer 
October 27, 2014 
Page 4 of 4 
Community Benefits 
This project saves the Port the potential cost and operational impacts of a domestic water failure
that could take several months to correct. Concessions and the traveling community will also
benefit by maintaining an uninterrupted water supply. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1)  Do nothing. Valves are already partially plugged and do not function. A more
significant failure is likely within the next two years. This is not the recommended alternative. 
Alternative 2)  Perform complete replumbing of the entire main terminal. This option is
prohibitively expensive and does not take advantage of the efficiencies gained by combining
future plumbing repair into upcoming work that will occur in the same locations. This is not the
recommended alternative. 
Alternative 3)  Perform selective replacement where the problems are the worst - mechanical
rooms 1-4. This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
None 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
None