Template revised April 12, 2018.
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
COMMISSION AGENDA – Action Item No. __6c__ Page 2 of 5
Meeting Date: October 9, 2018
Template revised September 22, 2016; format updates October 19, 2016.
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
Commission construction authorization
Construction start
In-use date
COMMISSION AGENDA – Action Item No. __6c__ Page 3 of 5
Meeting Date: October 9, 2018
Template revised September 22, 2016; format updates October 19, 2016.
Cost Breakdown
This Request
Total Project
Design
$1,325,000
Construction
$10,175,000
Total
$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.
COMMISSION AGENDA – Action Item No. __6c__ Page 4 of 5
Meeting Date: October 9, 2018
Template revised September 22, 2016; format updates October 19, 2016.
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
Taxiway Improvement Project
($22,200,000)
($22,200,000)
Budget Transfer from 2020-2024 Pavement
Replacement Program CIP
$2,100,000
$2,100,000
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
Design)
$1,325,000
$1,325,000
Total authorizations, including this request
$2,840,000
$0
$2,840,000
Remaining amount to be authorized for
(2019 Program – Construction)
$9,560,000
$9,560,000
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.
COMMISSION AGENDA – Action Item No. __6c__ Page 5 of 5
Meeting Date: October 9, 2018
Template revised September 22, 2016; format updates October 19, 2016.
Financial Analysis and Summary
Project cost for analysis
$12,400,000
Business Unit (BU)
Airfield Apron
Effect on business performance
(NOI after depreciation)
NOI after depreciation will increase
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.