COMMISSION 
AGENDA MEMORANDUM                        Item No.          6c 
ACTION ITEM                            Date of Meeting      October 9, 2018 
DATE:     September 14, 2018 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Michael Ehl, Director, Aviation Operations 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  2019 Airfield Pavement Replacement Projects (CIP #C800483) 
Amount of this request:                         $ 1,325,000 
Total estimated project cost:                     $ 11,500,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to proceed with design and
prepare construction documents for the replacement of distressed pavements and related
utilities  for  the  2019  Airfield  Pavement  portion  of  the  2016-2020  Airfield  Pavement
Replacement Program at the Seattle-Tacoma International Airport in an amount not to exceed 
$1,325,000. 
EXECUTIVE SUMMARY 
This project is part of an ongoing Pavement Management and Maintenance Program (PMMP)
as required by the Federal Aviation Administration (FAA). The focus of this program is to replace
distressed and damaged pavement on the airfield. This project will take advantage of these
replacements by also replacing in-pavement utilities and covers when it makes sense, as well as
removing abandoned utilities within the general work area. The project includes emergent
distressed areas on the airfield as well as areas surrounding the aircraft gates. 
Replacing damaged pavement on the airfield supports the long-term 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 PMMP maintains the integrity of airfield
pavements and enables efficient airport operations. Deferring damaged pavement replacement
could potentially increase risk to airfield operations, damage from ensuing foreign object debris
(FOD) and drive costs higher in the future. This project was included in the 2017  2021 capital
budget and plan of finance. 
JUSTIFICATION 
The 2019 Airfield Pavement Program is a continuation of the programmatic approach of
replacing aging and distressed pavement as part of a multi-year program. Many sections of

Template revised April 12, 2018.

COMMISSION AGENDA  Action Item No. __6c__                              Page 2 of 5 
Meeting Date: October 9, 2018 
airfield pavement have exceeded their 20-year service life and have become cracked and
damaged. 
This project will replace sections of failing asphalt pavement located south of the Cargo 4
Maintenance Facility, the fire lane east of Hardstand 7 and behind the Alaska Airlines Hangar,
the western edge of the South Satellite, the D Concourse Holdroom COBUS lane along the
fenceline to Gate E100, and individual panels of damaged concrete at various locations on
taxiways, runways,  and apron areas as determined by current inspections. The asphalt
pavement in these areas is no longer structurally adequate to handle the constant traffic weight
of large vehicles and ground support equipment (GSE). There have been foreign object debris
(FOD) issues coming from the Cargo Maintenance area, related to asphalt damage and failing
patches. This project will interface other projects and airline operations so that the scope and
schedule of this project will not be in conflict. Replacing distressed pavements on the airfield
ensures safe operations at Seattle-Tacoma International Airport. 
Continual coordination with Airport Operations, airlines, and related tenants is done to ensure
the least possible operational impact during construction. There are no planned construction
impacts in 2019 to major taxiways or runways. 
Through the Diversity in Contracting (DC) program, women- and minority-owned business
enterprise (WMBE) aspirational goals will be administered to support community participation
on this project. 
Specific WMBE outreach efforts will be conducted through the Port of Seattle's Small Business
Generator (PortGen) program, which includes targeted announcements to those interested
WMBEs within the categories of the project's scope of work. 
DETAILS 
Scope of Work 
(1)   Replace aging and distressed concrete pavement on the airfield. 
(2)    Replace sections of damaged and failing asphalt. 
(3)    Remove abandoned utilities and add or upgrade in-pavement utilities located within
the distressed pavements work area when it makes sense. 
Schedule 
Design start                                       2018 Quarter 3 
Commission construction authorization          2019 Quarter 1 
Construction start                                2019 Quarter 3 
In-use date                                       2019 Quarter 4 


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

COMMISSION AGENDA  Action Item No. __6c__                              Page 3 of 5 
Meeting Date: October 9, 2018 
Cost Breakdown                                      This Request          Total Project 
Design                                                   $1,325,000            $1,325,000 
Construction                                                      $0           $10,175,000 
Total                                                           $1,325,000            $11,500,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Delay the project beyond 2019 
Cost Implications: $12,064,000 
The estimate is based on the assumption of delaying this project to 2020. If the project is
delayed beyond 2020, the cost estimate would be  further  increased to reflect annual
escalation. 
Pros: 
(1) No construction cost for 2019. 
(2) No construction impacts to aircraft operations or airport operations at affected areas by
this project in 2019. 
Cons: 
(1) Continued use of the pavement could result in increased FOD, creating additional safety
hazards for aircraft ingestion. 
(2) This project would likely lose the opportunity to be combined with other construction
projects if delayed beyond 2019. This would result in contracting inefficiencies and more
impact to airfield operations. 
This is not the recommended alternative. 
Alternative 2  Only replace the individual damaged concrete panels on taxiways, runways, and
apron. 
Cost Implications: $3,800,000 
Pros: 
(1) Reduced total construction cost for 2019. 
(2) The  replacement  of  damaged  concrete  panels  helps  with  ensuring  safe  aircraft
operations. 
Cons: 
(1) Continued use of the aging and distressed asphalt pavement would result in increased
FOD and potentially increase risk to airfield operations. 
(2) Deferring asphalt replacement would likely drive costs higher in the future. 
This is not the recommended alternative. 


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

COMMISSION AGENDA  Action Item No. __6c__                              Page 4 of 5 
Meeting Date: October 9, 2018 
Alternative 3  Replace distressed pavements and supporting projects on the airfield during the
2019 construction season. 
Cost Implications: $11,500,000 
Pros: 
(1) Programmatic replacement of distressed pavements provides stable structural support
to aircraft and airport operations. 
(2) This project could be combined with other construction projects during the 2019 
construction season to increase efficiencies and minimize impacts to airport operations. 
(3) Supports the port's Century Agenda. 
Cons: 
(1) Earlier capital spending than the other alternatives. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS of 2019 Airfield Pavement Project C800483 
Cost Estimate/Authorization Summary               Capital        Expense           Total 
COST ESTIMATE 
Original Budget                                 $32,500,000              $0     $32,500,000 
Budget transfers  primarily to 2018           ($22,200,000)                    ($22,200,000) 
Taxiway Improvement Project 
Budget Transfer from 2020-2024 Pavement     $2,100,000                    $2,100,000 
Replacement Program CIP 
Revised Current Budget                        $12,400,000                    $12,400,000 
2019 Cost Estimate                            $11,500,000              $0     $11,500,000 
AUTHORIZATION 
Previous authorizations                          $1,515,000                      $1,515,000 
Current request for authorization (2019          $1,325,000                      $1,325,000 
Design) 
Total authorizations, including this request       $2,840,000               $0      $2,840,000 
Remaining amount to be authorized for         $9,560,000                     $9,560,000 
(2019 Program  Construction) 
Annual Budget Status and Source of Funds 
The Airfield Pavement Program (C800483) is included in the 2018-2022 capital budget and plan
of finance with a budget of $32,500,000. The budget of $22 million was moved to the 2018
Taxiway Improvement project C800914. To provide adequate budget for the 2019 projects,
$2.1 million was transferred from the 2020  2024 Airfield Pavement Program.  The 2019 
Airfield Pavement improvements are estimated to be $11,500,000. The funding sources for this
project will be the Airport Development Fund (ADF) and 2018A revenue bonds. 

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

COMMISSION AGENDA  Action Item No. __6c__                              Page 5 of 5 
Meeting Date: October 9, 2018 

Financial Analysis and Summary 
Project cost for analysis              $12,400,000 
Business Unit (BU)                  Airfield Apron 
Effect on business performance    NOI after depreciation will increase 
(NOI after depreciation) 
IRR/NPV (if relevant)                N/A 
CPE Impact                        $0.05 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 concrete pavement. Replacing
pavement will result in maintenance cost avoidance. Replacing joint sealant will help with
extending pavement service life and reducing lifecycle cost. 
ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
November 14, 2017  The Commission authorized advertisement and execution of a single
construction contract which included the 2018 Airfield Pavement Replacement as part
of the 2018 Taxiway Improvement Projects and approved non-use of PLA. 
May 9, 2017  The Commission authorized design funds for construction documents for
replacement of distressed pavement and joint sealant replacement in the 2018 portion
of the 2016-2020 Airfield Pavement Program, and approved use of PLA. 
October 25, 2016  The Commission authorized advertisement and execution of contract
for retrofits of 400 Hz In-ground power units and reconstruction of existing pavement at
Cargo 2. 
February 24, 2015  The Commission authorized design funds for construction documents,
for replacement of distressed pavement and joint seal in the 2016 portion of the 2016-
2020 Pavement Program. 





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