COMMISSION 
AGENDA MEMORANDUM                        Item No.          3c 
ACTION ITEM                            Date of Meeting        July 23, 2019 
DATE:     July 16, 2019 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Jeffrey Brown, Director of Aviation Facilities and Capital Programs 
Wayne Grotheer, Director Aviation Project Management 
SUBJECT:  Aviation Capital Project Planning and Preliminary Design  CIP #C801109 
Amount of request:                       $10,000,000 
ACTION REQUESTED 
Request Commission authorization to expend capital funds for project definition and
preliminary design on Sustainable Airport Master Plan (SAMP) Near-Term Projects in an amount
not to exceed $10,000,000; procure and execute professional service contracts; and enter into
reimbursable agreements with the Federal Aviation Administration (FAA) in relation to the
relocation and adjustment of the Runway 34R glideslope antenna as part of the Taxiways A and
B Extension project.
EXECUTIVE SUMMARY 
The SAMP Near-Term Projects (NTP) identifies projects that could be constructed in the nearterm
to accommodate forecast activity in 2027. This authorization will allow staff to conduct
project definition and preliminary design at risk on some of those SAMP Near-Term Projects, as
listed below in "Details" and additional SAMP NTP that may be identified through continued
advanced planning. 
Project definition and preliminary design will be useful for 
Setting stakeholder expectations, 
Creating a very solid basis for building a project schedule and budget, 
Understanding the risks of the project and how it related to other projects, 
Further defining the projects for environmental review, and 
For the Taxiway project, advancing the design for the relocation and adjustment to the
glideslope as recommended by the Sea-Tac Stakeholder Advisory Round Table (StART) 
working group. 
Staff will provide written updates to the Commission on the progress of these projects to
include additional projects added, as requested by the Commission.  Also, the environmental
review process is ongoing.  Approval of this preliminary design funding request does not

Template revised April 12, 2018.

COMMISSION AGENDA  Action Item No. __3c__                              Page 2 of 7 
Meeting Date: July 23, 2019 
commit the Port or the FAA to the selection of any of the Near-Term Projects following
completion of environmental review.  The Port and FAA retain the authority to make an
independent decision whether to proceed with the Near-Term Projects subsequent to
completion of environmental review. 
JUSTIFICATION 
Project definition and preliminary design of capital projects supports the following Century
Agenda strategic goals and objectives: 
1)  Advance this region as a leading tourism destination and business gateway 
a.  Meet the region's air transportation needs at the Airport for the next 25 years
and encourage the cost-effective expansion of domestic and international
passenger and cargo service 
2)  Be the greenest and most energy efficient port in North America 
a.  Reduce air pollutants and carbon emissions 
Timely and comprehensive information is critical at the preliminary design stage to provide 
decision makers and project teams information necessary to transition into design. While still
considered conceptual in nature, this more detailed information is compiled in a Project
Definition Document (PDD) and goes beyond the planning level to provide a greater degree of
certainty/confidence in: project definition; risks and opportunities; linkages to other projects
and actions; and project schedule and cost estimate. Timely completion of preliminary design
and definition for these early SAMP Near-Term Projects will ensure that the Port is prepared to
initiate construction as soon as possible following completion of the environmental review, if
the Commission and FAA decide to proceed with the relevant Near-Term Projects upon
completion of environmental review. 
DETAILS 
This authorization request supports only the initial phase of project definition and preliminary
design exclusively for projects included in the SAMP Near-Term Projects.  The design level at
this  phase  should  be  considered  approximately  15-30%.  Design  of  any  project  beyond
preliminary  design  will  require  additional  Commission  approval.  Project  definition  and
preliminary design of any project included in the SAMP Near-term Projects would progress at
risk as the work is contingent on the outcome of the environmental review process which is
currently underway and a decision by FAA and the Commission to proceed with the Near-Term
Projects. 
At this time, five projects have been identified as needing preliminary design over the next
several months in order to complete these projects within the timeframe proposed. These five
projects are included in the SAMP Near-Term Projects and are: 1) Westside Maintenance
Campus, 2) Permanent Westside Airport Rescue and Firefighting Facility (ARFF), 3) Roadway
Improvements, 4) Taxiway A/B Extension, and 5) Main Terminal North GT Lot. 

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

COMMISSION AGENDA  Action Item No. __3c__                              Page 3 of 7 
Meeting Date: July 23, 2019 
As additional information, the Taxiway A/B Extension project would require relocation of the
Runway 34R glideslope antenna which would enable a potential adjustment of the slope angle
to three degrees or more.  Increasing the slope angle enables higher aircraft elevation on
approach and is supported by the communities represented on the StART.  The glideslope
antenna is an FAA navigational aid, and as such, relocation requires design and construction by
the FAA with financial reimbursement by the Port.  Commission authorization to enter into
reimbursable agreements with the FAA is included in this authorization request. 
The five SAMP Near-Term Projects listed below were identified as needing preliminary design
over the next several months and currently are, or have recently been, the subject of advanced
planning.   This  authorization  request is inclusive of funding for project definition and
preliminary design of the five identified projects and potential additional projects anticipated to
be identified through continued advanced planning related to the SAMP Near-Term Projects.
No capital funds authorized under this funding request will be spent on project definition and
preliminary design for projects that are not included in the SAMP Near-Term Projects. A brief
description of the projects identified for additional definition and design are listed below. 
Westside Maintenance Campus:   The Port's current Maintenance Facility was
constructed in 1969 as a mail sortation facility. It is undersized for its current function,
is in a state of disrepair, and is proposed to be relocated to clear the site for potential
future hardstand construction identified in the SAMP Near-Term Projects. The capital
project planning process will include preliminary design development of the proposed
platform and facilities proposed for that platform. 
Permanent Westside Airport Rescue & Firefighting Facility (ARFF): The current ARFF was
constructed in 1979. It is undersized for its current function, is in a state of disrepair,
and is proposed to be relocated to clear the site for potential future gate construction
identified in the SAMP Near-Term Projects. The permanent westside location is planned
to be preliminarily developed as the new primary station. 
Roadway Improvements: The southbound lanes of the North Airport Expressway are 
proposed to be relocated to continue the congestion relief initiated with the Widen
Arrivals Approach project and to clear the site for potential airfield expansion and gate
construction identified in the SAMP Near-Term Projects. 
Taxiway A/B Extension: Extension of dual taxiways at the south end of the airfield will
increase operational efficiency and reduce aircraft delay.   The extension requires 
relocation of the Runway 34R glideslope antenna which would enable an adjustment of
the slope angle to increase aircraft elevation on approach. 
Main Terminal North GT Lot: The proposed multistory building could include functions
such as airline/airport support space that could be relocated from the existing terminal
to free up space for more critical passenger processing functions.  A more detailed
understanding of the building footprint and sublevels is also required to inform design
of the adjacent Widen Arrivals Approach project which will require utility relocations
through and adjacent to the site. 

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

COMMISSION AGENDA  Action Item No. __3c__                              Page 4 of 7 
Meeting Date: July 23, 2019 
Additional Projects: As advanced planning continues on the other SAMP NTP, there may
be a need to provide project definition and preliminary design of additional SAMP NTP,
provided that this additional work can be done within this authorized budget and within
the constraints of the SAMP NTP environmental review. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  No capital funds approved for project definition and preliminary design 
Cost Implications: $0 
Pros: 
(1)   No capital funds expended for this purpose in the short-term. 
Cons: 
(1)   Detailed project information would not be available to the Commission to enable
timely decisions regarding potential design authorization.
(2)   Delay in design would delay project implementation if the Commission and FAA decide
to proceed with the relevant Near-Term Projects upon completion of environmental
review. 
This is not the recommended alternative. 
Alternative 2  Capital funds approved for project definition and preliminary design 
Cost Implications: $10,000,000 
Pros: 
(1) Provides detailed project information to the Commission to enable timely decisions
regarding potential design authorization. 
(2) Timely project design will enable potential project implementation to proceed more
quickly if the Commission and FAA decide to proceed with the relevant Near-Term
Projects upon completion of environmental review. 
Cons: 
(1)   Capital funds expended in the short-term. 
(2)   Capital funds would need to be expensed if the projects are not implemented. 
This is the recommended alternative. 




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

COMMISSION AGENDA  Action Item No. __3c__                              Page 5 of 7 
Meeting Date: July 23, 2019 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary               Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                         TBD               $0             TBD 
Cost increase 
Revised cost estimate 
Potential future scope/cost increase                     TBD                              TBD 
AUTHORIZATION 
Previous authorizations                                   $0               $0               $0 
Current request for authorization               $10,000,000               $0     $10,000,000 
Total authorizations, including this request      $10,000,000               $0     $10,000,000 
Remaining amount to be authorized                   TBD                           TBD 
Annual Budget Status and Source of Funds 
The Aviation Capital Project Planning and Preliminary Design CIP #C801109 was not included in
the 2019-2023 capital budget. A $10M budget was transferred from the existing five CIPs for
SAMP preliminary planning and design which were included in the budget. The funding source 
will be the Airport Development Fund.   There is a risk that all or a portion of the capital
expenditures would be treated as operating expense if any of the respective projects are not
constructed. 
ADDITIONAL BACKGROUND 
Planning for the Port's Sustainable Airport Master Plan (SAMP) concluded in May of 2018 when
documentation was finalized and Port staff briefed the Commission. The SAMP documentation
serves as the official narrative to the ALP, which was conditionally approved by the FAA in
November 2018. Final approval of the ALP is dependent on completion of the environmental
review of the SAMP Near Term Projects.  The Port and the FAA retain authority to make
independent decisions on the Near-Term Projects and the ALP following environmental review. 
Advanced planning involves more detailed planning in focus areas of the SAMP Near-Term
Projects as well as existing facilities. Advanced planning studies typically involve one or more of
the following: site planning to allocate space and determine an optimal configuration of
multiple facilities on a campus; analysis within individual projects to develop and evaluate 
alternative  configurations  of  key  elements  of  a  single  facility;  and  phasing  plans  for
improvements within a campus or individual facility. 
Port staff initiated advanced planning in early 2017 and have concluded  several studies,
including the Main Terminal Optimization Plan. Site planning for the Westside Maintenance
Campus and the ARFF facility in the general aviation area are currently underway. 

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

COMMISSION AGENDA  Action Item No. __3c__                              Page 6 of 7 
Meeting Date: July 23, 2019 

Capital funds are required once a project has been clearly identified through advanced planning
- i.e., alternatives analysis and site planning have determined an optimal configuration of an
individual  facility.   It  is  at  this  point  that  preliminary  design  is  initiated  and  program
development for the project begins. 
















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

COMMISSION AGENDA  Action Item No. __3c__                              Page 7 of 7 
Meeting Date: July 23, 2019 
ATTACHMENTS TO THIS REQUEST 
(1)   Project PowerPoint Presentation 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
July 9, 2019  Commission Briefing: "Aviation Capital Project Planning and Preliminary
Design" 
February 26, 2019  Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Near-Term Projects (NTP) Environmental Review Briefing  Scoping Report" 
May 8, 2018  Commission Briefing: "Sustainable Airport Master Plan (SAMP) Planning
and Environmental Update" 
February 27, 2018  Commission Action: "Sustainable Airport Master Plan (SAMP)
Request for Additional Funds" 
February 13, 2018 - Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Planning Update" 
August 23, 2016 -  Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Planning Update" 
July 12, 2016 - Commission Briefing: "Sustainable Airport Master Plan (SAMP) Planning
Update" 
April 12, 2016 - Commission Briefing: "Sustainable Airport Master Plan (SAMP) Planning
Update" 
January 26, 2016 -  Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Planning Update" 
September 8, 2015 - Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Planning Update" 
April 28, 2015 - Commission Briefing: "Sustainable Airport Master Plan (SAMP) Planning
Update" 
March 24, 2015 - Commission Briefing: "Briefing on Sea-Tac Cargo as part of the
Sustainable Airport Master Plan (SAMP)" 
January 27, 2015 -  Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Planning Update" 
October 7, 2014 -  Commission Briefing: "Sustainable Airport Master Plan (SAMP)
Forecast and Facilities Challenges" 
March 11, 2014 - Commission authorization to amend the existing Sustainable Airport
Master Plan (SAMP) service agreement with Leigh Fisher Associates for IAF-related
planning tasks for an increase of $3,650,000 and a new total contract amount of
$9,650,000 
September 5, 2012 - Commission authorization for SAMP development and to advertise
and execute a contract for consulting services for the SAMP, with a total estimated
value of $6 million 
August 14, 2012 - Commission deferred consideration of a request to approve funding
for the Sustainable Airport Master Plan (SAMP) 
June 27, 2012 - Commission Briefing: "Terminal Development Challenges" 

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