Item No.  ____ _3c     ___ 
Meeting Date: July 23, 2019 
AVIATION CAPITAL PLANNING &
PRELIMINARY DESIGN ACTION ITEM 
July 23, 2019

Briefing overview 
Project Planning Process 
Near-Term Projects 
Projects Requiring Preliminary Design 
Glideslope Antenna Relocation 
Next Steps 


1

Project Planning Process 
Master planning - complete 
Campus wide, comprehensive planning 
Alternatives analysis for major plan elements 
Advanced planning - in progress 
More detailed planning in focus areas of long-range plan and existing facilities 
Alternatives analysis within individual projects (e.g. options for configuring curbs
and functional areas for Second Terminal) 
Preliminary design - current capital funds request 
Program development for individual projects 
Adequate detail required to transition projects to design 
Results in a Project Definition Document (PDD) 

2

Near-Term Projects 





3

Near-Term Projects 
Design/construction period estimates for major projects 




NOTE: Preliminary design precedes design phase shown above and is not depicted.
Commission authorization is required to proceed into design 
4

Projects Requiring Preliminary Design 
1 
1)  Westside Maintenance Campus 
2 
2)  Aircraft Rescue and Fire-
Fighting (ARFF) Relocation 
3)  Roadway Improvements 
4                                                                                                   4)    Taxiway A/B Extension 
5)  Main Terminal North GT Lot 
5                3 
Design/construction period estimates 


5

Glideslope Antenna Relocation 
Taxiway A/B project requires relocation of Runway 34R glideslope antenna 
Opportunity to adjust slope angle and increase aircraft elevation on approach 
Sea-Tac Stakeholder Advisory Round Table (StART) recommendation 
Relocate to potentially permanent location (i.e. consistent with Taxiway A/B project) 
Attempt to obtain a 3.1 glideslope angle 
Look for ways to expedite the project 
Begin design (design at risk prior to conclusion of environmental review) 
Initiate procedure development as soon as possible 
Design/construction by FAA with reimbursement by the Port 

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Next Steps 
Following Commission authorization 
Utilize $10M capital funds to conduct preliminary design 
Projects currently identified as requiring preliminary design in the short term 
Westside Maintenance Campus 
Air Rescue and Fire-Fighting (ARFF) Facility 
Taxiway A/B Extension 
Main Terminal North GT Lot 
North Airport Expressway Improvements 
Other projects to be identified through additional advanced planning 
Procure and execute professional services contracts 
Enter into Reimbursable Agreements with FAA (Glideslope) 

7