Template revised January 10, 2019.

COMMISSION

AGENDA MEMORANDUM

Item No.

10d

ACTION ITEM

Date of Meeting

November 10, 2020

DATE: October 30, 2020

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

replacement of distressed pavements and supporting infrastructure for the 2021 portion of the

2021-2025 Airfield Pavement and Supporting Infrastructure Replacement Program at the

Seattle-Tacoma International Airport. This construction authorization is for $37,900,000 for a

total authorization to date of $51,395,000. The total 2021-2025 program cost is $153,500,000.

Replacement Management Program supports the FAA mandated Pavement Maintenance

Management Program (PMMP), which identifies pavement replacement priorities and is

directly related to grant funding. 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.

The 2021 project is the first year of the 2021-2025 Airfield Pavement and Supporting

Infrastructure Replacement Program. The pavements and utility infrastructure identified for

this 2021 project have been determined by annual pavement inspections and reporting. The

scope of the 2021 project focusses on those assets having the three following criteria: (1)

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

exceptionally high age, (2) continual need for repair, and (3) high strategic value to airfield

operations.

The 2021 project was included in the 2021-2025 capital plan and the funding sources will be the

Airport Development Fund, FAA AIP grants, and revenue bonds.

JUSTIFICATION

The Airport has approximately 21,850,000 square feet of runway, taxiway, taxilane, and apron

pavement. To comply with the Federal Aviation Administration Pavement Management

Program requirement, the Airport must complete yearly pavement inspections detailing

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 to engines and aircraft taken out of service each

Previous pavement and utility investments over the last 20 years have focused on the airfield’s

runway and connecting taxiway system (i.e., the Movement Area). The apron and taxilanes

around the terminal areas (i.e., the Non-Movement Area) have been managed through a focus

performs phasing work to reduce airline impacts.

Replacing distressed pavement and supporting infrastructure 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 Airport’s Pavement

Maintenance Management Program maintains the integrity of airfield pavements and enables

efficient airport operations.

The 2021-2025 Airfield Pavement and Supporting Infrastructure Replacement Program was

presented at the Airline Airport Affairs Committee (AAAC) meeting in September 2019 and the

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

authorized by Commission in October 2019. As part of the April 2020 Commission study session

on the Capital plan, this project was included as a prioritized aviation project accomplishing the

stated aviation goals of meeting safety, operational continuity, and critical infrastructure needs,

as well as utilizing available federal funding. Additionally, the study session prioritized this

project as meeting all four guiding principles: (1) Maximize economic benefit, (2) Ensure high

M/WBE utilization, (3) Benefit small business, and (4) Advance environmental protection.

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

infrastructure/utilities in close proximity to pavement work areas or in support of airfield

operations. Abandoned fuel line systems and contaminated in-situ soils will also be removed.

The 2021 project scope includes the following items:

• Work Area S - Replacement of the Portland Cement Concrete Pavement (PCCP) and

supporting infrastructure on the south side of the South Satellite.

• Work Area C - Replacement of PCCP, the adjacent Asphalt Concrete Pavement vehicle service

road and supporting infrastructure at Cargo 4.

• Work Area R/T - Replacement of PCCP joint sealant materials along RW 16R/34L, Taxiway T

Operations to identify safety hazards during construction and documented mitigations to

ensure safe airfield operations during construction. The final report from the Safety Risk

Management Panel was approved by the FAA in August 2020.

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.

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

Total Project

ALTERNATIVES AND IMPLICATIONS CONSIDERED

Alternative 1 – Postpone the replacement of the distressed and damaged airfield pavement

and supporting infrastructure included in 2021 Scope to 2022 or beyond.

Cost Implications: Increases the total program cost from $153,500,000 to $161,100,000.

(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 $7,000,000.

(3) Additional disruption to airport/airline operations in 2022 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.

This is not the recommended alternative.

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

Alternative 2 – Replace the distressed and damaged airfield pavement and supporting

infrastructure in the 2021 Scope and continue the program on schedule for the period 2021 –

2025.

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

37,900,000

0

37,900,000

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

Annual Budget Status and Source of Funds

grants, and revenue bonds.