COMMISSION 
AGENDA MEMORANDUM                        Item No.          8e 
ACTION ITEM                            Date of Meeting       May 11, 2021 

DATE:     April 30, 2021 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Wendy Reiter, Director, Aviation Security 
Wayne Grotheer, Director Aviation Project Management 
SUBJECT:  International Arrivals Facility (IAF) Maintenance Path Fence (C801218) 
Amount of this request:               $1,164,000 
Total estimated project cost:          $1,214,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) complete design and (2)
utilize Port crews and a small works contract to construct the IAF Maintenance Path Fence project
at Seattle-Tacoma International Airport (SEA). This single authorization is for $1,164,000 of a total
estimated project cost of $1,214,000. 
EXECUTIVE SUMMARY 
The International Arrivals Facility (IAF) project installed a maintenance pathway from the arrivals
sidewalk to facilitate exterior facility maintenance. The location of the maintenance pathway is
in close proximity to roadways and tunnels. This creates a safety and security concern of 
unwanted pedestrian activity accessing secured areas and roadways and tunnels not designed to
facilitate pedestrian traffic. This project will install a security fence along the outside edge of the
maintenance pathway, remove the temporary bus turnaround and restore the area adjacent to
the terminal curbside. 
JUSTIFICATION 
This project will support the Century Agenda goal to advance this region as a leading tourism
destination and business gateway by meeting the region's air transportation needs through
delivering vital facilities and infrastructure in a sustainable and cost-effective manner. This
project will help ensure the safety and security of facilities, passenger, contractors  and
employees at SEA. 


Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. __8e__                              Page 2 of 4 
Meeting Date: May 11, 2021 
Diversity in Contracting 
Design will be completed by Port Engineering. Port Construction Services (PCS) will complete all
construction except for the permanent fence. PCS will manage a small works contract for the
permanent fence. P ort Construction Services (PCS) will work with Diversity in Contracting
department to conduct outreach and will set appropriate aspirational goals for women and
minority business enterprises (WMBE) participation. 
DETAILS 
The project is located within the current project limits of the IAF project. Construction will not be
able to start until the IAF project completes work in the area. Temporary fencing will be required
in order to maintain security once the IAF project removes their construction fencing. 
Port Engineering will provide all design support. PCS will provide all construction management
support and perform most of the work. A small works contract will provide and install permanent
fence. 
Scope of Work 
The project will install an eight-foot tall gated fence that would be located along the eastern edge
of the IAF maintenance pathway. The temporary bus turnaround area would have a wall placed
along its eastern edge, then be regraded to address safety concerns and restoring it to pre-IAF
condition. The fence would be architectural anti-climb fencing, and the slope would be replanted,
both to Landscape Master Plan standards. 
Schedule 
Commission design and construction             2021 Quarter 2 
authorization 
Design start                                        2021 Quarter 2 
Construction start                                 2021 Quarter 4 
In-use date                                        2022 Quarter 2 
Cost Breakdown                                     This Request           Total Project 
Design                                                    $481,000               $481,000 
Construction                                              $733,000               $733,000 
Art (Transfer to Art CIP)                                        ($12,000)                ($12,000) 
Total                                                         $1,202,000              $1,202,000 



Template revised June 27, 2019 (Diversity in Contracting).

COMMISSION AGENDA  Action Item No. __8e__                              Page 3 of 4 
Meeting Date: May 11, 2021 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Defer scope to later projects or no action 
Cost Implications: $0 
Pros: 
(1)   Zero costs 
Cons: 
(1)   Does not address immediate security concern 
(2)   Does not address temporary bus turnaround safety concern 
This is not the recommended alternative. 
Alternative 2  Install interim fence, remove temporary bus turnaround and defer permanent
fence. 
Cost Implications: $950,000 
Pros: 
(1)   Lower costs option 
(2)   Partially meets immediate need 
Cons: 
(1)   Does not represent long term solution 
(2)   Not determined how long temporary fence would remain in place 
(3)   Would not be as aesthetically pleasing or meet landscape master plan. 
This is not the recommended alternative. 
Alternative 3  Install permanent fence and remove temporary bus turnaround 
Cost Implications: $1,214,000 
Pros: 
(1)   Long term solution 
(2)   Would be aesthetically pleasing 
(3)   Addresses safety concern by removing temporary bus turnaround 
Cons: 
(1)   Highest costs 
This is the recommended alternative. 




Template revised June 27, 2019 (Diversity in Contracting).

COMMISSION AGENDA  Action Item No. __8e__                              Page 4 of 4 
Meeting Date: May 11, 2021 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary                            Capital              Total 
COST ESTIMATE 
Original estimate                                               $1,214,000         $1,214,000 
Art (Transfer to Art CIP)                                             ($12,000)           ($12,000) 
Revised Total                                                  $1,202,000         $1,202,000 
AUTHORIZATION 
Previous authorizations                                           $50,000            $50,000 
Current request for authorization                              $1,164,000         $1,164,000 
Total authorizations, including this request                      $1,214,000         $1,214,000 
Remaining amount to be authorized                                 $0                $0 
Annual Budget Status and Source of Funds 
This project, CIP C801218, was not included in the 2021-2025 capital budget and plan of finance.
A budget of $1,214,000 was transferred from the Aeronautical Reserve CIP (C800753) resulting
in zero net change to the Aviation capital budget. Of that, $12,000 will be transferred into the Art
Pool (C102066) pending this request. The funding source will be the Airport Development Fund
(ADF). 
Financial Analysis and Summary 
Project cost for analysis              $1,202,000 
Business Unit (BU)                  Airfield Movement Area 
Effect on business performance     NOI after depreciation will increase due to inclusion of
(NOI after depreciation)             capital (and operating) costs in airline rate base 
IRR/NPV (if relevant)                N/A 
CPE Impact                       Less than $.01 in 2023 
Future Revenues and Expenses (Total cost of ownership) 
This project will not have a significant impact on Aviation Maintenance annual operating and
maintenance (O&M) costs performed by the field crew for the fencing, gates and retaining wall.
ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
None 

Template revised June 27, 2019 (Diversity in Contracting).