COMMISSION 
AGENDA MEMORANDUM                        Item No.          8e 
ACTION ITEM                            Date of Meeting     November 16, 2021 

DATE:     October 15, 2021 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Laurel Dunphy, Director, Aviation Operations 
Wayne Grotheer, Director, Aviation Project Management 
SUBJECT:  2021 -2025 Airfield Pavement and Supporting Infrastructure Replacement Program
(CIP #C800930)
Amount of this request:              $24,000,000 
Total estimated project cost:        $153,500,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) advertise and execute a
major works construction contract and (2) include a Project Labor Agreement for the 2022 
Airfield Pavement and Supporting Infrastructure Replacement Project, at the Seattle-Tacoma
International Airport. This authorization is for $24,000,000 with a total authorized to date of
$79,195,000 and a previously approved total 2021-2025 program budget of $153,500,000. 
EXECUTIVE SUMMARY 
The 2021-2025 Airfield Pavement and Supporting Infrastructure Replacement Program is a
continuation of the programmatic approach of replacing distressed airfield pavements, joint
sealant, and supporting infrastructure at the Airport. With many of the pavements and
supporting airfield infrastructure having long exceeded their planned lifespan, a robust
pavement and utility infrastructure replacement program is required. It is required to provide
safe and efficient conditions for aircraft operations and meet Federal Aviation Administration
(FAA) requirements. The 2022 construction project is the second year of the five-year program 
and focusses on existing assets meeting the three following criteria: (1) exceptionally high age,
(2) continual need for repair, and (3) high strategic value to airfield operations. 
JUSTIFICATION 
The Airport has approximately 21,850,000 square feet of runway, taxiway, taxilane, and apron
pavement. To comply with the Federal Aviation Administration (FAA) Pavement Management
Program requirement, the Airport must complete yearly pavement inspections detailing
pavement conditions according to specific FAA criteria.

Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. _8e__                               Page 2 of 6 
Meeting Date: November 16, 2021 
These yearly inspections support FAA project funding requests and aid in the development of 
prioritized work plans. Most airfield pavements included in this project have far exceeded their
20-year design service life and lack the thickness to support the weight and volume of the
Airport's aircraft operations; these pavements have become cracked and damaged. Damaged
and distressed concrete and asphalt produce loose gravel and rock Foreign Object Debris
("FOD") which is then picked up by vehicle tires or blown by jet engine exhaust and spread
across the apron, taxiways and runways.  Loose debris then becomes a major hazard when
ingested into an aircraft engine, causing significant and costly damage. Boeing estimates that
FOD causes an estimated $4 billion in damage worldwide, to engines and aircraft taken out of
service each year.
Replacing distressed pavement and supporting infrastructure on the airfield supports the longterm
strategy of the Port's Century Agenda objective to "meet the region's air transportation
needs at Seattle-Tacoma International Airport for the next 25 years." The Airport's Pavement
Maintenance Management Program maintains the integrity of airfield pavements and enables
efficient airport operations. 
The 2021-2025 Airfield program was presented at the Airline Airport Affairs Committee (AAAC)
meeting in September 2019 and the Majority-In-Interest ballot was approved in January 2020.
Design for the entire five-year program was authorized by Commission in October 2019. 
Construction for  the 2021 year of work was authorized in November 2020 and will be 
completed on-time and under budget this month. This authorization for year 2022 continues
the approach of annual Commission authorization for each year's construction. 
Diversity in Contracting 
This  program  includes  federally  assisted  funding  that  requires  the  use  of  the  federal
Disadvantaged Business Enterprise (DBE) program rules, which includes the setting of DBE
goals. The Diversity in Contracting Department, along with project staff, have identified 9% DBE
requirements for the 2022 project.
DETAILS 
The overall purpose of the 2021-2025 program is to replace distressed and/or damaged
pavements on the airfield that will cause FOD in the aircraft operational areas. It also replaces
joint  seal  in  areas  that  are  most  problematic  or  where  missing;  and  replaces
infrastructure/utilities   near    pavement   work   areas   or   in   support   of   airfield
operations. Abandoned fuel line systems and contaminated in-situ soils will also be removed. 
The work completed in 2021 included a continuation of pavement reconstruction around the
South Satellite as well as reconstruction of the Cargo 4 apron. The work in 2022 is detailed
below. 


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

COMMISSION AGENDA  Action Item No. _8e__                               Page 3 of 6 
Meeting Date: November 16, 2021 
Scope of Work 
The 2022 project scope includes the following items: 
Work Area N - Portland Cement Concrete Pavement (PCCP) and supporting
infrastructure replacement on portions of the ramp and taxilane serving the southeast 
side of the North Satellite. 
Work Area C  IWS channel drain upgrade and Cargo 2 Taxilane PCCP replacement. 
Work Area B  Replacement of a portion of Taxiway B PCCP; near the intersection of
Taxiway S and Taxiway B. 
Work Area H  Installing over height vehicle clearance bar protection system on
Perimeter Road leading to RW 16R-34L Approach Lighting System bridge.
Work Area J - Replacement of PCCP joint sealant materials and pavement markings on
portions of Taxiways M, N, P and Q. 
The 2022 project will be constructed between April and November 2022. The construction
phasing plan was developed to minimize the impacts from construction to airlines and airfield
operations.  In addition, technical reviews and a Construction Safety Risk Management Panel
were conducted in July 2021 with the FAA, Airlines, Ramp Tower, and Airport Operations to
identify safety hazards during construction and document mitigations to ensure safe airfield
operations during construction. The final report from the Safety Risk Management Panel was
approved by the FAA in October 2021. 
A project labor agreement was evaluated in collaboration with Port of Seattle Labor Relations
and will be used based on the location and complexity of this project and the importance of
labor continuity and stability to minimize the operational impacts during construction. 
Schedule 
Activity 
Construction start                                2022 Quarter 2 
In-use date                                       2022 Quarter 4 
Cost Breakdown                                     This Request           Total Project 
Design                                                           $0            $16,000,000 
Construction                                           $24,000,000          $137,500,000 
Total                                                        $24,000,000           $153,500,000 




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

COMMISSION AGENDA  Action Item No. _8e__                               Page 4 of 6 
Meeting Date: November 16, 2021 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Postpone the replacement of the distressed and damaged airfield pavement
and supporting infrastructure included in 2022 Scope to 2023 or beyond. 
Cost Implications: Increases the total program cost from $153,500,000 to $158,540,000. 
(Postponing the 2022 scope to 2023 will end up postponing the remaining annual airfield
pavement replacement scope.)
Pros: 
(1)   Reduced capital spending in 2022. 
(2)   Less construction impacts to airport/airline operations in 2022. 
Cons: 
(1)    Continued use of aging and distressed asphalt and concrete pavement increases risk
of producing FOD and potentially increased risk of ingestion and aircraft damage. 
(2)    Delay in aging concrete replacement pushes full replacement into future, escalating
actual cost for the 2021-2025 program by over $5,000,000. 
(3)    Additional disruption to airport/airline operations in 2023 or beyond. 
(4)    Deteriorating pavement and infrastructure may cause incidents on the airfield and
lead to unplanned disruptions to airfield operations. 
(5)    Potential loss of FAA's AIP Funding (approx. $8M). 
This is not the recommended alternative. 
Alternative 2  Replace the distressed and damaged airfield pavement and supporting
infrastructure in the 2022 Scope and continue the program on schedule for the period 2021  
2025. 
Cost Implications: Keeps project on-schedule to complete within $153,500,000 budget 
Pros: 
(1) Programmatic replacement of aged and distressed pavements and related
infrastructures. 
(2) Coordination between resource assets increases efficiencies and minimizes airport and
airline operational disruption and impacts during construction. 
(3) Portions of construction are eligible for Federal Funding (approx. $8M). 
(4) In alignment with FAA's 5-year Airport Capital Improvement Plan. 
(5) Lower capital spending for the overall 2021-2025 program as compared to Alternative 1. 
Cons: 
(1) Earlier capital spending in 2022. 
This is the recommended alternative. 


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

COMMISSION AGENDA  Action Item No. _8e__                               Page 5 of 6 
Meeting Date: November 16, 2021 
FINANCIAL IMPLICATIONS 
The 2021-2025 Airfield Pavement and Supporting Infrastructure Replacement Program is
included in the annual FAA Airport Capital Improvement Program (ACIP) letter for FAA Airport
Improvement Program (AIP) Grant funding. The program will receive federal grant funding for
eligible items meeting the FAA standards and the anticipated FAA grant reimbursement over
the five-year program is $48 million. In 2021 the estimated grant capture will be $17.6M with
an additional $8.0 million targeted for the year 2022. 
Cost Estimate/Authorization Summary              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                               $155,740,000        $560,000   $156,300,000 
Prior change (transferred to C800483)          ($2,800,000)                0    ($2,800,000) 
Revised estimate                             $152,940,000       $560,000   $153,500,000 
AUTHORIZATION 
Previous authorizations                         $55,085,000        $110,000     $55,195,000 
Current request for authorization               $23,850,000        $150,000     $24,000,000 
Total authorizations, including this request      $78,935,000        $260,000     $79,195,000 
Remaining amount to be authorized           $74,005,000       $300,000    $74,305,000 
Annual Budget Status and Source of Funds 
This project, C800930 Airfield Pavement and Supporting infrastructure Replacement Program,
was included in the 2022-2026 capital budget and plan of finance with a budget of $152,940 
This project has a Majority-In-Interest approval from the airlines in January 2020. The funding
sources will be the Airport Development Fund, AIP grants, and revenue bonds. 
Financial Analysis and Summary 
Project cost for analysis              $153,500,000 
Business Unit (BU)                  Airfield movement and airfield apron 
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                       Total project cost CPE of 0.37 in 2026; annual CPE of .05 
ATTACHMENTS TO THIS REQUEST 
1.  Presentation slides 



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

COMMISSION AGENDA  Action Item No. _8e__                               Page 6 of 6 
Meeting Date: November 16, 2021 

PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
$295,000 - Seed funds to support 2021 Airfield Pavement and Supporting Infrastructure
Replacement Project preliminary design (commission authorization was not required). 
$16,000,000 - 2021-2025 Airfield Pavement and Supporting Infrastructure Replacement
Project design authorized on 10/22/2019. 
($2,800,000) - Transferred portion of 2021-2025 APSIRP program (C800930) to 2016-
2020 AIP (C800483) program to fund accelerated scope authorized on 5/12/2020 
$37,900,000 -  2021 Airfield  Pavement and  supporting  Infrastructure  Replacement
Project construction authorized on 11/10/2020. 
$3,800,000 -  North  Runway  Protection  Zone  Culvert   construction  authorized
on 8/10/2021. 












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