PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      4d 
ACTION ITEM 
Date of Meeting      June 10, 2014 
DATE:    June 2, 2014 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:   Wayne Grotheer, Director, Aviation Project Management Group 
David Soike, Director, Aviation Facilities and Capital Programs 
SUBJECT:  2014-2015 Roof Replacement Project (CIP #C800637) 
Amount of This Request:         $453,000   Source of Funds:  Airport Development
Fund and Future
Est. Total Project Cost:          $4,785,000 
Bonds 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to prepare design and
construction bid documents for the replacement of approximately 160,000 square feet of roof
systems located on three buildings:  the Alaska Hangar One and associated maintenance
building, Air Cargo 6 facility,  and the former United Cargo Building at Seattle-Tacoma
International Airport for an amount not to exceed $453,000 of a total estimated project cost of
$4,785,000. 
SYNOPSIS 
This project will remove and replace the current roofing system on the Alaska Hangar One and
associated maintenance building, and the Air Cargo 6 facility, and install a new roof over the top
of the existing metal roof on the former United Cargo Building at the Airport in order to avoid
leaks that cause damage to the underlying infrastructure, equipment, and interior facilities. The
roof systems being replaced on each building were installed in 1980 or earlier. The existing roofs
are deteriorating and the useful life of the roofs has expired. 
This project was included in the 2014-2018 plan of finance with a budget of $5,007,000. After
refinements of the earlier budget estimate, the current estimated total project cost is $4,785,000.
This is the fourth of a series of necessary design and construction steps to accomplish reroofing
the Airport facilities over the next several years. The replacement roof systems will meet the
new building codes related to energy efficiency. Staff expects to seek Commission authorization
annually over the next three years as part of the Airport campus-wide long-term roofing
maintenance program. 


Template revised May 30, 2013.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
June 2, 2014 
Page 2 of 6 
BACKGROUND 
The first phase of the current cycle of completed roof replacements, which began in 2010,
included the south end of the Main Terminal. The second phase of the cycle included the Fire
Station and the north end of the Main Terminal. The third phase of the cycle of roof replacement
projects at the Airport includes Concourse D, which will be replaced this year. 
These buildings were originally owned by tenants and ownership was transferred to the Port at
the end of long-term leases. The Alaska Hangar One and associated maintenance building were
constructed in March 1966, and ownership was transferred to the Port in June 2007. The Air
Cargo 6 building was constructed in 1976, and ownership was transferred to the Port in June
2012. The United Cargo Building was constructed in 1970, and the Port took maintenance
responsibility for the building in May 2014. Until ownership was transferred, the Port was not
responsible for maintaining these roofs.
The Port's intention is to maintain two of these buildings in their current function for the
foreseeable future. While it is likely that the third building, the former United Cargo Building,
will continue to be used for cargo purposes; staff will verify that use in comparison to initial
master plan results before final design of its roof gets fully underway, as the master plan may
conceive of a change in future use of the facility.  Therefore staff will initially determine
alternatives for roofing with a shorter life-span for this particular building.
PROJECT JUSTIFICATION AND DETAILS 
The Port's responsibility to provide safe and functional facilities translates in this area to
maintaining the Airport's roofing systems so they are leak free. The roofs on the Alaska Hangar
and associated maintenance building, the Air Cargo 6 facility, and the former United Cargo
Building are critical systems to the occupancy of the buildings. As the roofs age and reach a
deteriorated state they must be replaced. These roofing systems have reached the end of their
dependable leak-free life span.  When roofs fail they can create an emergency for tenant
occupants and a liability for the Airport.
Project Objectives 
This project will provide a new roof system over each of the three buildings. 
Scope of Work 
Remove and replace the existing roof system on the Alaska Hangar One and associated
maintenance building, and the Air Cargo 6 facility, both of which will be replaced with a new 65
millimeter elastomeric roofing system. The former United Cargo building existing roof is metal.
Staff will have its roofing system evaluated during design to determine the best type of new
roofing system for this building. The total roofing system area to be replaced is approximately
160,000 square feet. Necessary fall protection such as fixed ladders and railings will be installed
where necessary on the buildings. Design will be completed using primarily in-house design
services.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
June 2, 2014 
Page 3 of 6 
Schedule 
Commission Authorization for Design                            June 2014 
Commission Authorization for Construction                     November 2014 
Issue Notice to Proceed                                       June 2015 
Construction Complete                                   October 2015 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary              Capital     Expense   Total Project 
Original Budget                      $5,007,000          $0    $5,007,000 
Budget Reduction                     -$222,000         $0     -$222,000 
Revised Budget                     $4,785,000         $0    $4,780,000 
Previous Authorizations                       $0          $0          $0 
Current request for authorization              $453,000          $0      $453,000 
Total Authorizations, including this request      $473,000          $0      $473,000 
Remaining budget to be authorized         $4,312,000          $0    $4,312,000 
Total Estimated Project Cost              $4,785,000          $0    $4,785,000 
Project Cost Breakdown 
Design Phase                              $453,000 
Construction Phase                          $3,992,000 
State & Local Taxes (estimated)                   $340,000 
Total                                      $4,785,000 
Budget Status and Source of Funds 
The 2014-2015 Roof Replacement Project (CIP #C800637) is included in the 2014-2018 capital
budget and plan of finance. The capital budget decrease of $222,000 will be transferred to the
Aeronautical Allowance CIP (C800404) resulting in no net change to the Airport capital budget.
The funding source will be the Airport Development Fund and future revenue bonds. The Port
anticipates issuing revenue bonds in late 2014 or early 2015 to fund multiple 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        $4,785,000 
Business Unit (BU)          Airfield Commercial Area 
Effect on business performance  NOI after depreciation will decrease 
IRR/NPV             N/A 
CPE Impact             None

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
June 2, 2014 
Page 4 of 6 
Lifecycle Cost and Savings 
The existing roofing systems have surpassed their life expectancy of 15 to 20 years. While these
buildings and roofs were being maintained by the airlines, patches and fixes were made to extend
the life of the roofs. The Alaska Hangar roof's life expectancy should have been 20 years. It has
lasted nearly 40 years. The roof on the Cargo 6 facility had a life expectancy of 20 years and has
lasted nearly 50 years. The United Cargo Building roof was installed in 1970 and had a life
expectancy of 30 years. This roof has been in use for nearly 50 years. The new roof systems are
not expected to have significant repair costs for the first 15 years. Preventive maintenance costs
will be consistent with the current maintenance program.
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
facilities to accommodate current as well as future airline tenants and needs. In addition, two of
the buildings support cargo operations, thus contributing to the Century Agenda objective of
tripling air cargo volume. 
Replacing the most distressed Airport roofs in a timely fashion as they deteriorate 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 and the region's
economy; and managing our assets to minimize the long-term total cost of ownership. 
The Project Manager and the Office of Social Responsibility will work together 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 facilities and supports the
long-term vitality of the Airport, airlines, and Airport tenants. 
Environmental Responsibility 
The new roof systems will have a solar reflective index that exceeds 78, which is the value
required to obtain the LEED Credit NC 7.2. This will reduce air conditioning loads and save
electricity. The new roofing systems will also be Energy Star rated. The insulating value of the
new roof systems will be greater than that of the existing roofing systems. By replacing the roof
systems and preventing damage to the underlying building systems, the life of the existing
building systems will be prolonged. Roof materials may be sourced locally form the Pacific
Northwest.  Roofing systems replaced will use  materials exceeding LEED requirements. 
Opportunities will also be investigated to recycle the existing roof and associated components.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
June 2, 2014 
Page 5 of 6 
Community Benefits 
Replacing the roofing systems will prevent water leak damage to other building systems, prevent
disruption of Airport operations, and improve customer service. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1)    Continue to patch and repair the leaks risking continued retrogressive
deterioration throughout the 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 unsafe work environments, and possible ceiling, floor, and equipment damage caused
by the leaks.  This also increases liability should people slip and fall. This is not the
recommended alternative. 
Alternative 2)  Replace the roofing systems using systems with shorter life expectancy. This
would mean that the overall price of system replacement would cost less in the short term, but
over the course of time it would cost more to replace the roof systems more frequently. This is
not the recommended alternative. 
Alternative 3)  Replace the roofing systems using systems with a longer life expectancy. This
alternative has the least cost over time. This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
Roof Map 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
April 1, 2014   the Commission authorized  a budget increase of $219,000 and
execution of a major public works construction contract with the low responsive and
responsible bidder for the Concourse D roof replacement. 
January 28, 2014  the Commission authorized construction funds for the Concourse D
roof replacement. 
July 9, 2013  the Commission authorized design funds for the Concourse D roof
replacement. 
January 8, 2013  the Commission authorized construction funds for the North End
Main terminal roof replacement. 
January 24, 2013  the Commission authorized construction funds for the Fire Station
roof replacement. 
July 26, 2011  the Commission approved 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 authorized construction funds for the first phase
of the Airport re-roofing program. 
April 27, 2010  the Commission approved design funds for the first phase of the
Airport re-roofing program.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
June 2, 2014 
Page 6 of 6 
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.