COMMISSION 
AGENDA MEMORANDUM                        Item No.          6e 
ACTION ITEM                            Date of Meeting        July 10, 2018 
DATE:     June 22, 2018 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Wendy Reiter, Director, Aviation Security 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Airfield Operations Area (AOA) Perimeter Fence Line Standards Compliance 
(CIP #C800842) 
Amount of this request:               $1,255,000 
Total estimated project cost:          $6,935,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director  to increase the Airfield
Operations Area Perimeter Fence Line Standards Compliance project scope and budget by
$1,255,000 for a revised total project cost of $6,935,000. 
EXECUTIVE SUMMARY 
This project will ensure that the primary barriers into the secured areas of the airport provide a
high level of deterrence and comply with the current security standards, which is critical to safe
and efficient airport operations. Specifically, it will replace all remaining seven-foot AOA
perimeter fence sections and associated gates with twelve-foot fence and one-foot of barbed
wire at the top, consistent with the standards agreed to with the Transportation Security
Administration (TSA) and incorporated into the Airport Security Plan. In addition, Gate E-105,
next to the Airport Rescue and Firefighting Facility, will be replaced with a more secure and
faster gate operator to shorten response time by the Fire Department. 
Commission authorization was obtained on June 13, 2017, to design, advertise and execute a
construction  contract  for  the  project.  The  cost  estimate  was  updated  based  on  the
advancement of the design to final design and the modified agreements signed in September
2017 between the Port and the TSA. The current cost estimate is approximately $1.3 million
more than the previous estimate and the primary reasons for the increase are additional items
identified during design. The additional scope items include non-climbable fence for areas
identified by Security, the installation of faster gate operating system at AOA access gate E-160,
the replacement of related AOA access gates, and the installation of security camera system. 


Template revised April 12, 2018.

COMMISSION AGENDA  Action Item No. __6e__                              Page 2 of 5 
Meeting Date: July 10, 2018 
The project was presented at the Airline Airport Affairs Committee (AAAC) meeting on May 18,
2017, and received a positive majority-in-interest (MII) vote in September 2017.  Since this
time, the Port has worked with the Federal Aviation Administration (FAA) to secure a FAA
Airport Improvement Program (AIP) grant for a portion of the project.  Consequently, an
additional MII vote is not needed as the airline rate based costs will likely be lower than the
original approval.  Since this will be an AIP funded project, the Port will include goals for
Disadvantaged Business Enterprises (DBEs). 
JUSTIFICATION 
The Airport Operations Area (AOA) perimeter fence line is the primary physical barrier into the
secured areas of commercial airports. Over the past years, other airports have experienced
several nationally recognized breaches in security that included accessing the AOA by climbing
over a perimeter fence. Seattle-Tacoma International Airport has also experienced this type of
trespass. There is a recognized need to improve security by increasing the level of difficulty for
unauthorized access through the AOA perimeter fence. 
After the event of 9/11, the Port of Seattle established a minimum fence height of twelve feet
for the AOA perimeter fence wherever permissible by the Federal Aviation Administration
(FAA). Portions of the perimeter fence have been replaced with the twelve foot fence over time
as construction projects moved fence lines. However, there are still areas with shorter fence
that need to be upgraded. 
Agreements were signed in September 2017 between the Port and the Transportation Security
Administration (TSA). As required in the agreements, non-climbable fence needs to be installed
for areas having higher potential for intrusion such as adjacent to roadways or where buildings
are present. 
DETAILS 
Primary reasons for the cost increase are additional items identified during design including (1)
the installation of non-climbable fence for areas with a higher potential of intrusion such as
adjacent to roadways or where buildings are present, based on the modified agreement
between the Port and the TSA; (2) the installation of faster gate operating system for AOA
access gate E-160 to standardize gate operating device for higher operating speed and
reliability; (3) the replacement of related AOA access gates including E-165, E-170, E-175, E-145,
E-100, E-160, W-45, E-105, E-150, E-155 and E-180 and (4) the installation of security camera
system for identified AOA access gates by Security to comply with the current airport security
requirements. 
Scope of Work 
(1)      Replace approximately 8,100 linear feet of seven-foot AOA perimeter fence with twelvefoot
fence plus one foot of barbed wire at the top. Approximately 6,500 linear feet out
of the 8,100 linear feet of fence will be replaced with non-climbable fence. 

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. __6e__                              Page 3 of 5 
Meeting Date: July 10, 2018 
(2)      Replace affected AOA access gates including E-165, E-170, E-175, E-145, E-100, E-160,
W-45, E-105, E-150, E-155 and E-180. 
(3)      Install faster gate operating system for AOA access gates E-105 and E-160. 
(4)      Install security camera system for E-100, E-105, E-160 and E-180. 
Schedule 
Commission design & construction           2017 Quarter 2 
authorization 
Commission added scope & budget          2018 Quarter 3 
authorization 
Construction start                             2019 Quarter 1 
In-use date                                    2019 Quarter 3 
Cost Breakdown                                     This Request           Total Project 
Design                                                           $0             $1,120,000 
Construction                                             $1,255,000             $5,815,000 
Total                                                         $1,255,000              $6,935,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Only include the project scope obtained by Commission authorization on June
13, 2017.
Cost Implications: $5,680,000 
Pros: 
(1)   No additional cost. 
Cons: 
(1)    Continued use of the substandard AOA access gates presents risks of unauthorized
access to the restricted areas. 
(2)   Not in full compliance with the Airport Security plan or modified agreement between
the Port and TSA for the standard of non-climbable AOA perimeter fence for areas
with a higher potential of intrusion. 
This is not the recommended alternative. 
Alternative 2  Replace all identified substandard AOA perimeter fence and access gates. Install
non-climbable fence for identified areas with a higher potential of intrusion.
Cost Implications: $6,935,000 
Pros: 
(1)    Fully comply with the Airport Security plan and the modified agreement between the
Port and TSA. 

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. __6e__                              Page 4 of 5 
Meeting Date: July 10, 2018 
(2)   Improve airport security by installing twelve-foot AOA fence and access gates around
the perimeter wherever permissible. 
(3)    Replacement of emergency access gate E-105 with faster operating system will help to
shorten Fire Department response time. 
(4)    Installation of faster gate operating system for gate E-160 helps with standardizing
gate operating device for higher operating speed and reliability to enhance both
security and efficiency. 
Cons: 
(1)    Additional capital spending. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                 $3,993,000               $0      $3,993,000 
Previous changes  net                          $1,687,000               $0      $1,687,000 
Current change                                 $1,255,000              $0      $1,255,000 
Revised estimate                                $6,935,000              $0      $6,935,000 
AUTHORIZATION 
Previous authorizations                          $5,680,000               $0      $5,680,000 
Current request for authorization                $1,255,000               $0      $1,255,000 
Total authorizations, including this request       $6,935,000               $0      $6,935,000 
Remaining amount to be authorized                    $0             $0             $0 
Annual Budget Status and Source of Funds 
The Airfield Operations Area (AOA) Perimeter Fence CIP #C800842 was included in the 2018-
2022 capital budget and plan of finance as a business plan prospective with a total capital
budget of $5,680,000. The cost increase of $1,255,000 was transferred from the Aeronautical
Allowance (CIP #C800753), resulting in no net change to the capital budget. An FAA grant
application will be submitted with anticipated eligible amount of $3.7 million. This project was
approved at an amount of $5,680,000 by the airlines through a majority-in-interest (MII) vote in
September 2017. The increased cost of scope changes will be offset with AIP grant funding
source so that it will not require an additional MII vote. The project will also be funded with the
Airport Development Fund and revenue bonds. 
Financial Analysis and Summary 
Project cost for analysis              $3,235,000 rate base cost 
Business Unit (BU)                  Airfield Movement Area 
Effect on business performance     NOI after depreciation will increase 

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. __6e__                              Page 5 of 5 
Meeting Date: July 10, 2018 
(NOI after depreciation) 
IRR/NPV (if relevant)                N/A 
CPE Impact                       $0.01 in 2020 
Future Revenues and Expenses (Total cost of ownership) 
Annual Operating and Maintenance costs are not anticipated to change appreciably. The
estimated life expectancy for this project is 20 years for perimeter fence and access gates. 
ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
June 6, 2017  The Commission authorized $5,660,000 to design and prepare construction
documents for the enhancement of Airport Operations Area (AOA) perimeter fence and
access gate E-105 at the Seattle-Tacoma International Airport; and advertise and
execute  a  construction  contract  for  the  AOA  Perimeter  Fence  Line  Standards
Compliance project at Seattle-Tacoma International Airport. 











Template revised September 22, 2016; format updates October 19, 2016.