PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      5b 
ACTION ITEM 
Date of Meeting     January 28, 2014 
DATE:    January 21, 2014 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:   Wayne Grotheer, Director, Aviation Project Management Group 
David Soike, Director, Aviation Facilities and Capital Program 
SUBJECT:  Concourse D Roof Replacement Project (CIP #C800550) 
Amount of This Request:        $3,197,000   Source of Funds:  Airport Development 
Fund and Future
Est. Total Project Cost:          $3,727,000 
Revenue Bonds 
Est. State and Local Taxes:        $227,000 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to advertise for construction
bids, award, execute contract, and construct a new roofing system on Concourse D at Seattle-
Tacoma International Airport in an amount not to exceed $3,197,000. T he total cost of the
project is estimated to be $3,727,000. 
SYNOPSIS 
This project will remove and replace the current roofing system on Concourse D of the main
terminal building at the Airport in order to avoid leaks that cause damage to the underlying
infrastructure, equipment, and interior facilities. The portions of the roof being replaced were
installed in 1991 and 1994 and will be beyond their useful life expectancy when replacement
takes place. This is the third of a series of necessary progressive design and construction steps to
accomplish re-roofing the Airport facilities over the next several years. Warranties on existing
roofs have expired and testing of roof membranes by Airport maintenance staff indicates they are
deteriorating. The replacement roof will be Energy Star rated and will save energy over its
lifetime. Staff expects to seek Commission authorization annually over the next five years as 
part of a long-term roofing maintenance program. This project is included in the 2014  2018
capital budget and plan of finance. 
BACKGROUND 
In 1991, the Airport began a major terminal facility re-roofing program that was completed in
1997. Since 1997, some Airport roofs have been replaced on a project- or area-specific basis.


Template revised May 30, 2013.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
January 21, 2014 
Page 2 of 5 
The first phase of the cycle of completed roof replacements included sections on the south end of
the Main Terminal. The second phase of the cycle included the Fire Station, which was replaced
in 2012, and sections on the north end of the Main Terminal that were replaced in 2013. 
This project is the third phase of the cycle of roof replacement projects at the Airport. It includes
numerous sections of the Concourse D roof. When originally built, the Airport's current roofs
had a 15-year life expectancy that has expired. 
PROJECT JUSTIFICATION AND DETAILS 
Maintaining Airport roofing systems supports the Port's objective to provide safe and functional
facilities. As a critical system, the Concourse D roof must be replaced as has aged beyond its
dependable, leak-free, lifespan. When a roofing system fails and leaks emerge, they must be
corrected on an emergency basis in order to preserve underlying infrastructure and provide good
customer service. Delaying repairs until leaks require emergency attention tends to be more
expensive due to scheduling pressures. In addition, repairing damage from leaks inside the
terminal can be extensive and expensive. Proceeding with replacement of the Concourse D roof
will preserve the Airport's infrastructure investments and support outstanding customer
experience for travelers and tenants. 
Project Objectives 
This project will remove and replace existing roof systems on Concourse D of the Airport. 
Scope of Work 
Remove and replace the existing roof system on Concourse D at the Airport and install a
new 65 millimeter elastomeric roofing system. 
Remove and replace two skylights and make repairs to existing skylight window/walls.
The Concourse D roof system is approximately 70,100 square feet. 
Add permanent safety ladders. 
Schedule 
Commission Authorization to Design:                             July 2013 
Commission Authorization for Construction:                      January 2014 
Issue Notice to Proceed:                                       June 2014 
Construction Complete:                                 September 2014 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary              Capital     Expense   Total Project 
Original Budget                      $1,927,750          $0    $1,927,750 
Budget Increase Authorized July 9, 2013       $1,325,050     $474,200    $1,799,250 
Revised Budget                     $3,252,800     $474,200    $3,727,000 
Previous Authorizations                  $501,800      $28,200      $530,000

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
January 21, 2014 
Page 3 of 5 
Current request for authorization            $2,751,000      $446,000    $3,197,000 
Total Authorizations, including this request     $3,252,800      $474,200    $3,727,000 
Remaining budget to be authorized               $0          $0          $0 
Total Estimated Project Cost              $3,252,800     $474,200    $3,727,000 
Project Cost Breakdown                     This Request       Total Project 
Construction                               $2,388,000         $2,388,000 
Construction Management                     $359,000         $359,000 
Design                                       $0          $430,000 
Project Management                         $187,000         $287,000
Permitting                                   $36,000           $36,000 
State & Local Taxes (estimated)                   $227,000          $227,000 
Total                                     $3,197,000         $3,727,000 
Budget Status and Source of Funds 
This project is included in the 2014  2018 capital budget and plan of finance. The funding
source will be the Airport Development Fund and future revenue bonds. The Port plans to issue
revenue bonds in 2014 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        $3,727,000 
Business Unit (BU)          Terminal 
Effect on business performance  NOI after depreciation will increase 
IRR/NPV             N/A 
CPE Impact             CPE will increase by $.02 in 2014 due to expense
elements of the project and by $.01 in 2015 due to
ongoing capital costs, but no change compared to 2014
budget or business plan forecast as this project was
included. 
Lifecycle Cost and Savings 
The existing roof has reached its life expectancy of 15 years. Repair costs have increased since
year 10. The new roof in this section is not expected to have significant repair costs for the first
five years. Preventive maintenance costs will be consistent with the current maintenance
program. It is expected that the newer roofing system will have a greater life expectancy than the
original system by at approximately 15%.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
January 21, 2014 
Page 4 of 5 
STRATEGIES AND OBJECTIVES 
This project supports the Port's Century Agenda objective of meeting the region's air
transportation needs at the Airport for the next 25 years. The Airport must maintain its existing
terminal to accommodate current as well as future passenger and cargo levels. 
Replacing the most distressed Airport roofs in order of importance supports the objectives
identified in the Aviation Division's Strategy of operating a World Class International Airport
by: ensuring safe and secure operation; meeting needs of our tenants, passengers and the region's
economy; and managing our assets to minimize the long-term total cost of ownership. 
The Project Manager will work with the Office of Social Responsibility to determine small
business participation opportunities, in accordance with small business Resolution No. 3618. 
TRIPLE BOTTOM LINE 
Economic Development 
This roof replacement project represents an investment in our current facility and supports the
long-term vitality of the Airport, businesses within the Airport, and the traveling public.
Environmental Responsibility 
The new roof will be Energy Star rated and have a minimum solar reflective index that exceeds
78, which is the value required to obtain the LEED Credit NC7.2.  This will reduce air
conditioning loads and save energy. The insulating value of the new roof will be greater than
that of the existing roof. By replacing the roof and preventing damage to the underlying building
systems, the life of the existing building systems will be prolonged. 
Community Benefits 
Replacing the roof will prevent water leak damage to other building systems, disruption of
airport operations and will improve customer service. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1)  Continue to patch and repair leaks, risking continued retrogressive deterioration
throughout the entire roof system. This alternative increases maintenance and emergency repair
response and costs, not only due to the continual patching of the existing roof system but also
due to ceiling, floor, and equipment damage caused by the leaks, This could also increase the
Port's liability should customers slip and fall. This is not the recommended alternative. 
Alternative 2)  Install a green roof system. Green roofs are complete roof systems comprised
of vegetation, soil, drainage and waterproof membrane, requiring specific additional structural
integrity not currently in place as part of the Airport structure. This alternative would create an
environment that would attract birds, insects and other wildlife, increase bird strike hazards, and
escalate nuisance-wildlife control. Installing a green roof would be in direct conflict with the
Airport's Wildlife Hazard Mitigation and Wildlife Conservation Program and the Federal

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
January 21, 2014 
Page 5 of 5 
Aviation Administration approved Airport Certification Manual. This is not the recommended
alternative. 
Some airports have begun to use green roof systems on new construction (thereby avoiding the
extensive redesign and structural strengthening retrofit issue for existing structures) using plants
that do not attract birds or wildlife. Staff has been in communication with Portland International
Airport (PDX) which has installed a green roofing system. PDX's green roof system has
attracted insects and birds, which conflicts with the requirements in the FAA's Airport
Certification Manual. 
Alternative 3)  Develop a systematic replacement program for the Airport's roof systems.
Phase the replacement program over multiple years, which allows the Airport to sustain
serviceable roof systems and provide safe and productive environments for our business partners
and passengers. Through roof inspection and analysis, the third phase of the roof replacement
program has identified 70,100 square feet of roof on Concourse D.  This is the recommended
alternative. 
ATTACHMENTS TO THIS REQUEST 
Roof Replacement Planning Map 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
July 9, 2013  the Commission voted to authorize design funds for the Concourse D
roof replacement. 
January 24, 2013  the Commission voted to authorize construction funds for the Fire
Station roof replacement. 
January 8, 2013  the Commission voted to authorize construction funds for the North
End Main terminal roof replacement. 
July 26, 2011  the Commission voted to approve design funds for the second phase of
the Airport re-roofing programs including design of the Fire Station and North End
Main Terminal roofing systems. 
November 30, 2010  the Commission voted to authorize construction funds for the
first phase of the Airport re-roofing program. 
April 27, 2010  the Commission voted to approve design funds for the first phase of
the Airport re-roofing program. 
September 22, 2009  the Commission was briefed on facility renewal projects that
were necessary in future years. The Airport re-roofing program was included in the
presentation.