COMMISSION 
AGENDA MEMORANDUM                        Item No.          8h 
ACTION ITEM                            Date of Meeting        June 8, 2021 
DATE:     May 28, 2021 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Laurel Dunphy, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Project Management 
SUBJECT:  North Employee Parking Lot Improvements (C800957) 
Amount of this request:               $4,385,000 
Total estimated project cost:         $15,400,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) authorize an additional
amount of $980,000 for the design and construction of Phase I, and (2) complete design , (3)
utilize Port crews and small works contracts to complete early pavement work, and (4) authorize
an additional amount of $3,405,000,  for Phase II of the North Employee Parking Lot
Improvements project at Seattle-Tacoma International Airport. This request is in the amount of 
$4,385,000, for a total authorization in the amount of $5,000,000. 
EXECUTIVE SUMMARY 
The North Employee Parking Lot (NEPL) Improvements project is being conducted in 2 phases 
and provides upgrades and replacement to failing infrastructure at the existing employee parking
facility. NEPL project Phase I consists of improvements to the bus shelters and electric vehicle
parking stations to support operations in existing infrastructure, which has been in use for over
23 years. Phase II of the project includes pavement restoration, an assessment of electric vehicle
parking expansion and replacement of failing storm water channel drains, water lines, and an 
approximately 1,400-foot rockery retaining wall. The total project cost estimate has increased 
from $6,635,000 to $15,400,000 primarily due to scope additions for failing infrastructure and
costs associated with schedule delays. The authorization for construction of Phase II is not 
included in this request. Staff will return for Commission consideration separately at a later date. 
JUSTIFICATION 
This project supports the Century Agenda goals to advance this region as a leading tourism
destination and business gateway and to be the greenest and most energy-efficient port in North
America. The NEPL was placed into service in August 1998 and provides employee parking for
Airport tenants, service providers, and airline employees. After 23 years of use, the NEPL requires 
improvements to ensure the continued use of this facility, as well as improve environmental

Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. _8h_                                Page 2 of 6 
Meeting Date: June 8, 2021 
compliance, and increase customer satisfaction. The project will also expand electric vehicle
parking as allowed by current infrastructure and assess further expansion. 
Diversity in Contracting 
The project team is working with the Diversity in Contracting Department to determine
participation opportunities and will set appropriate aspirational goals for women and minority
business enterprises (WMBE) participation for the construction contracts. The design contract
includes an aspirational goal of seven percent for WMBE participation. 
DETAILS 
The NEPL provides 4,122 employee parking spaces for Airport tenants, service providers, and
airline employees. A total of 11,170 monthly parking permits have been issued for the use of this
facility out of an available 12,000 monthly parking permits. Airport Operations provides a 24/7
transit connection to the Main Terminal that currently operates on a ten-minute headway. 
Port Commission authorized Phase I design and construction on October 9, 2018 and the project
had completed 60% design before being deferred last year. Phase I of the NEPL Improvements 
project is comprised of a minor remodel of the bus shelters, upgrades to restrooms compliant 
with the current Americans with Disabilities Act requirements, and will establish a permanent
space to support the busing operations, which will include the installation of Wi-Fi. The NEPL
project Phase I also expands the available electric vehicle parking from 12 existing stalls to 14 
stalls. Primarily due to requirements driven by codes and standards and costs associated with the
schedule delay, the Phase I estimate increased from $615,000 to $1,595,000 for this project.
Additionally, NEPL Phase I and Phase II improvements were separated into their own individual
projects and an estimate error occurred, which did not account for the cost of contractor general
conditions, estimated in the amount of $444,000. 
Phase II of the NEPL Improvements project will replace the failing asphalt concrete pavement
along the bus pathway and repair limited identified areas of pavement distress. The entire
parking lot will be seal coated to extend the useful life of the pavement in the parking areas. In
addition, the project scope has increased to include the replacement of failing storm water
channel drains, water line, and a rockery retaining wall. Mainly, due to the addition of project 
scope to replace failing infrastructure, standards, additional contingency to cover project risks,
and costs associated with the schedule delay, the cost estimate has increased from $6,020,000
to $13,805,000  for Phase II. Details of the cost increase can be found in the attached
presentation. 
Phase II of the NEPL Improvements project will also incorporate a small works contract that will
seal coat a portion of the parking area during summer 2021. Due to the current decrease in
overall airport activity levels there is an opportunity to complete this work and minimize the
impacts to Airport employees from the larger construction effort. This early pavement work also
reduces the overall construction schedule and budget for the larger construction effort. 

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

COMMISSION AGENDA  Action Item No. _8h_                                Page 3 of 6 
Meeting Date: June 8, 2021 
In support of the Environmental Sustainability Framework, this project will also assess the
amount and type of electric vehicle parking station that should be provided. Phase I of this project 
completes the installation of two additional electric vehicle charging stations utilizing existing
infrastructure for a total of 14 charging stations in NEPL. Additional infrastructure improvements
are required to further expand electric vehicle charging. Therefore, Phase II of this project will
assess the overall requirements and expansion of the existing infrastructure as part of the
schematic design effort. Currently, the project scope does not include an expansion of existing
electrical infrastructure or additional charging equipment to support further expansion of electric
vehicle parking. 
Scope of Work 
Phase I of the project includes: 
Upgrade and refresh of existing bus shelters including operational areas, restrooms, and
associated accessibility improvements 
Replacement of a failed perimeter gate 
Update of existing entry monument site to meet code requirements 
Installation of two additional electric vehicle charging stations 
Phase II of the project includes: 
Replacement of failed asphalt with concrete pavement in the bus pathway, asphalt
restoration and seal coating in parking areas, restriping and numbering of all vehicle stalls,
fire and bus lanes, pedestrian walkway, and updating signage. 
Replacement of one 3" water line providing domestic water service to all three bus
shelters. 
Replacement of failing storm water channel drains with heavy duty channel drains along the
bus pathway. 
Replacement of failing rockery retaining wall on the northside of the parking lot. 
Schedule 
Activity 
Phase I Construction start                                 2022 Q1 
Phase I In-use date                                         2022 Q3 
Phase II Design start                                        2021 Q2 
Phase II Commission construction authorization          2022 Q1 
Phase II Construction start                                 2022 Q2 
Phase II In-use date                                         2023 Q3 



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

COMMISSION AGENDA  Action Item No. _8h_                                Page 4 of 6 
Meeting Date: June 8, 2021 
Cost Breakdown                                     This Request           Total Project 
Phase I Design                                               $392,000               $706,000 
Phase I Construction                                        $588,000               $889,000 
Phase II Design                                             $3,051,000              $3,051,000 
Phase II Construction                                        $354,000               $354,000 
Total                                                         $4,385,000              $5,000,000 

ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Only Phase I of the project is completed 
Cost Implications: $1,595,000 
Pros: 
(1)   Bus shelter improvements would be completed in support of operational requirements 
(2)   Capital costs are minimized 
Cons: 
(1)   Maintenance costs for failing areas of the parking lot (pavement, water line, channel
drains, rockery retaining wall) would continue to escalate 
(2)   Continuing degradation to Port assets and risk of complete failure 
This is not the recommended alternative. 
Alternative 2  Complete Phase I, and complete pavement preservation only for Phase II 
Cost Implications: $8,200,000 
Pros: 
(1)   Bus shelter improvements would be completed in support of operational requirements. 
(2)   Pavement in the bus pathway and parking areas are renewed to support continuing
operations 
(3)   Capital costs are reduced 
Cons: 
(1)   Maintenance costs for failing areas of the parking lot (water line, channel drains, rockery
retaining wall) will continue to escalate 
(2)   Continuing degradation to Port assets and risk of complete failure. 
(3)   Significant construction phasing will be required to minimize impact to the customers
lengthening the schedule and increasing costs. 
(4)   Potential loss of public parking revenue at the Main Garage to provide employee
overflow parking during construction 
This is not the recommended alternative. 


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

COMMISSION AGENDA  Action Item No. _8h_                                Page 5 of 6 
Meeting Date: June 8, 2021 
Alternative 3  Complete Phase I and all of Phase II 
Cost Implications: $15,400,000 
Pros: 
(1)   Bus shelter improvements would be completed in support of operational requirements. 
(2)   Extends the life of Port assets through pavement renewal and replacement of failing
infrastructure. 
(3)   Reduces on-going facility maintenance requirements therefore reducing long term 
costs to the Port. 
Cons: 
(1)   Significant construction phasing will be required to minimize impact to the customers, 
lengthening the schedule and increasing costs. 
(2)   Potential loss of public parking revenue at the Main Garage to provide employee
overflow parking during construction. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                 $6,635,000               $0      $6,635,000 
Current change                                 $8,692,000         $73,000      $8,765,000 
Revised estimate                               $15,327,000         $73,000     $15,400,000 
Art (Transfer to Art CIP, Phase 1 Only)              ($16,000)               $0        ($16,000) 
Revised Total                                   $15,311,000         $73,000     $15,384,000 
AUTHORIZATION 
Previous authorizations                            $615,000               $0        $615,000 
Current request for authorization                $4,385,000               $0      $4,385,000 
Total authorizations, including this request       $5,000,000               $0      $5,000,000 
Remaining amount to be authorized           $10,311,000        $73,000    $10,384,000 
Annual Budget Status and Source of Funds 
This project, CIP C800957, was included in the 2021-2025 capital budget and plan of finance with
a total budget of $6,635,000. A budget increase of $8,765,000 was transferred from the Non-
Aeronautical Reserve CIP (C800754) resulting in zero net change to the Aviation capital budget. 
$16,000 will be transferred into the Art Pool (C102066) pending this request. The funding source
will be the Airport Development Fund (ADF) and revenue bonds. The incremental impact to
Employee Parking Card rate between $0.10 to $10.40 in 2022-2024. 


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

COMMISSION AGENDA  Action Item No. _8h_                                Page 6 of 6 
Meeting Date: June 8, 2021 
Financial Analysis and Summary 
Project cost for analysis              $15,400,000 
Business Unit (BU)                  Employee Parking 
Effect on business performance     NOI after depreciation will decrease due to inclusion of
(NOI after depreciation)             capital (and operating) cost. 
IRR/NPV (if relevant)                Incremental employee parking card rate between $0.10
to $10.40 in 2022-2024 
CPE Impact                       N/A 
Future Revenues and Expenses (Total cost of ownership) 
This project will reduce long-term operating and maintenance costs for the facility by replacing
failing infrastructure. 
ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
October 9, 2018  The Commission authorized Design and Construction for Phase I of the NEPL
Improvements project 










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