Template revised January 10, 2019.
COMMISSION
AGENDA MEMORANDUM
Item No.
8h
ACTION ITEM
Date of Meeting
November 21, 2023
DATE: November 10, 2023
TO: Stephen P. Metruck, Executive Director
FROM: Keri Stephens, Director, Aviation Facilities and Capital Programs
Eileen Francisco, Director Aviation Project Management
SUBJECT: Parking Garage Rehabilitation (#C801307)
Amount of this request:
$2,100,000
Total estimated project cost:
$55,709,000
ACTION REQUESTED
Request Commission authorization for the Executive Director to (1) execute a project-specific
design services contract, and (2) complete preliminary project work for the Parking Garage
Rehabilitation project at Seattle-Tacoma International Airport (SEA) for a total authorization of
$2,100,000.
EXECUTIVE SUMMARY
The SEA Parking Garage was constructed in three phases; the oldest central portion dating back
to 1969 and is reaching its 50-year asset life, and two outboard expansion phases that were
constructed in the 1990s. The project will provide architectural, fire suppression,
mechanical/HVAC, medium voltage power, storm drainage, and structural/seismic
improvements necessary to extend the asset life of the facility and meet current code
requirements. The SEA Parking Garage currently supports public parking and ground
transportation operations and is the highest non-aeronautical revenue generator at SEA. A
facility assessment report will be prepared as part of this effort to identify and prioritize the
work to be completed to extend the service life of this critical SEA asset.
JUSTIFICATION
This project supports the following Century Agenda strategic goal to advance this region as a
leading tourism destination and business gateway, through the objective to meet the region’s
air transportation needs by delivering vital facilities and infrastructure in a sustainable and cost-
effective manner. The SEA Parking Garage is a major facility supporting both public parking
(terminal direct, general, and pre-booked parking) and ground transportation (app based
rideshare, courtesy vehicle, cruise charter bus, door to door service, pre-arranged limousine,
COMMISSION AGENDA – Action Item No. __8h__ Page 2 of 5
Meeting Date: November 21, 2023
Template revised June 27, 2019 (Diversity in Contracting).
and taxi) operations. In 2022 public parking generated $88.9 million, and ground transportation
generated $20.8 million, in operating revenue for the Port.
Diversity in Contracting
The project team working with the Diversity in Contracting Department has set an aspirational
goal of 20% for women and minority business enterprises (WMBE) participation in the design
services contract.
DETAILS
The SEA Parking Garage was constructed in three phases; the oldest central portion dating back
to 1969 and has reached its 50-year asset life, and two outboard expansion phases that were
constructed in the 1990s. Aging facilities have an increased frequency of failing infrastructure
and systems, or systems become outdated and no long support the operational need or meet
current code requirements, and the SEA Parking Garage is no exception. Separate efforts have
already been completed, or are underway, that have addressed communications, lighting, low
voltage power, revenue control, and vertical circulation systems within the facility. This project
will address the remaining facility components including architectural, fire suppression,
mechanical/HVAC, medium voltage power, storm drainage, and structural/seismic.
The completion of the project will require the procurement and execution of a project-specific
design services contract with a total contract value of $5 million. This Commission
authorization request only includes preliminary project work, so only a portion of this contract
value will be utilized. Future Commission authorization will be required to utilize the remaining
value of this contract.
Scope of Work
As part of the preliminary project work, a facility assessment report will be completed that will
identify facility deficiencies, code requirements, and estimated costs to address these
deficiencies or requirements. These efforts will be prioritized and programmed as part of this
project, or future projects, to extend the service life of the facility. Preliminary design will also
be completed to validate the budget and schedule requirements for the defined project scope.
Port staff anticipates that the project scope will include the following:
• Architectural: The installation of new or replacement of failed or failing weatherproofing
membranes and required accessibility improvements.
• Fire Suppression: The replacement or upgrade of the two separate fire suppression systems
in the facility to meet code requirements.
• Mechanical/HVAC: The replacement or upgrade of existing ventilation systems to meet
code requirements.
• Medium Voltage Power: The replacement or upgrade of the medium voltage power system.
• Storm Drainage: The replacement of failed or failing infrastructure, and a new connection
into the storm drainage system instead of the industrial wastewater system providing
capacity relief for SEA’s industrial wastewater treatment plant.
COMMISSION AGENDA – Action Item No. __8h__ Page 3 of 5
Meeting Date: November 21, 2023
Template revised June 27, 2019 (Diversity in Contracting).
• Structural/Seismic: The renewal/repair of existing structural elements, replacement of
expansion joints, and structural and seismic upgrades.
Schedule
Preliminary Design start
Commission Project Authorization
Begin Construction
In-use date
Cost Breakdown
This Request
Total Project
Design
$2,100,000
$8,885,000
Construction
$0
$46,824,000
Total
$2,100,000
$55,709,000
ALTERNATIVES AND IMPLICATIONS CONSIDERED
Alternative 1 – Continue deferring improvements or upgrades for the SEA Parking Garage
Cost Implications: $0
Pros:
(1) Capital investment not required.
Cons:
(1) Does not address the current identified deficiencies or code requirements.
(2) Defers investment to extend service life of critical SEA asset and thereby increasing
risk of facility failure.
(3) Does not provide capacity relief for SEA’s industrial wastewater treatment plant.
This is not the recommended alternative.
Alternative 2 – Address code requirements and critical structural repairs/upgrades for the SEA
Parking Garage.
Cost Implications: $30,000,000
Pros:
(1) Addresses code requirements.
(2) Reduced capital investment required.
(3) Extends the service life of some infrastructure systems of critical SEA asset.
Cons:
(1) Does not address all the current identified deficiencies.
(2) Defers investment for some infrastructure systems to extend service life of critical SEA
asset.
(3) Does not provide capacity relief for SEA’s industrial wastewater treatment plant.
This is not the recommended alternative.
COMMISSION AGENDA – Action Item No. __8h__ Page 4 of 5
Meeting Date: November 21, 2023
Template revised June 27, 2019 (Diversity in Contracting).
Alternative 3 – Address code requirements and prioritized deficiencies for the SEA Parking
Garage
Cost Implications: $55,709,000
Pros:
(1) Addresses code requirements and identified deficiencies.
(2) Extends the service life of the SEA Parking Garage, a critical asset.
(3) Provides capacity relief for SEA’s industrial wastewater treatment plant.
Cons:
(1) Requires greater capital investment.
This is the recommended alternative.
FINANCIAL IMPLICATIONS
Cost Estimate/Authorization Summary
Capital
Expense
Total
COST ESTIMATE
Original estimate
$55,709,000
$0
$55,709,000
AUTHORIZATION
Previous authorizations
$0
$0
$0
Current request for authorization
$2,100,000
$0
$2,100,000
Total authorizations, including this request
$2,100,000
$0
$2,100,000
Remaining amount to be authorized
$53,609,000
$0
$53,609,000
Annual Budget Status and Source of Funds
This project #C801307 was included in the 2023-2027 capital budget and plan of finance with a
total budget of $55,709,000. This project will be funded by the Airport Development Fund and
future bonds.
Financial Analysis and Summary
Project cost for analysis
$55,709,000
Business Unit (BU)
Public Parking
Effect on business performance
(NOI after depreciation)
NOI after depreciation will decrease
IRR/NPV (if relevant)
N/A
CPE Impact
N/A
Future Revenues and Expenses (Total cost of ownership)
The operation and maintenance costs are anticipated to increase with improvements to the fire
suppression and ventilation systems. Based upon the average yearly rainfall, costs for the
COMMISSION AGENDA – Action Item No. __8h__ Page 5 of 5
Meeting Date: November 21, 2023
Template revised June 27, 2019 (Diversity in Contracting).
treatment of stormwater from the SEA Parking Garage is anticipated to decrease by $135,000
annually.
ATTACHMENTS TO THIS REQUEST
(1) Presentation slides
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS
None