ITEM NO.  _7a_Supp________ 
DATE OF 
MEETING: Oct 11, 2011_____

City of SeaTac Park & Fly Program 
Potential Impacts on 
Seattle-Tacoma International Airport

City Center Zoning Code Revisions 
Ad Hoc Committee (AHC) 
Council requested AHC review of City Center Parking
Program 
11 members including business reps, citizens and 2
Councilmembers 
Identified two options for consideration by Planning
Commission and City Council 
Recommendations Not Yet Reviewed

City Center Zoning Code Revisions 
Proposed Model #2 
Could result in as many as 7,000 stalls 
Possible use of Sound Transit bridge for pedestrian
access to Airport 
Recent Garage Development Under Existing Code 
Wally Park:  1,595 stalls 
Master Park:  1,061 stalls

City Center

Park & Fly Trends/Projections 
Total market stalls - projected supply & demand 
40,000
Parking stalls       35,000
30,000

25,000

20,000
Historic supply
15,000
Supply incl. airport garage 1st/2nd floors, plus stalls under construction, plus 7,000
Supply incl. airport garage 1st/2nd floors, plus stalls under construction
10,000
Historic demand
Demand assuming historic high parking to passenger ratio
5,000
Demand assuming year 2010 parking to passenger ratio
0
2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020

Park & Fly Trends 
Annual O&D enplanements and 
parking demand 
14                                                                1.8
Millions                                                                           Airport O&D
enplanements      1.6  Millions 
12
1.4
10
Long-term parking            1.2
demand (estimated
O&D enplanements                                                 market-wide) 
8                                                                1.0

6                                                                0.8    Parking transactions 
0.6
4
0.4
2
0.2

0                                                                0.0
2002     2003     2004     2005     2006     2007     2008     2009     2010

Potential Revenue Loss 
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Potential revenue      Potential revenue      Non-aeronautical
loss (low end)         loss (high end)        income after debt
service

Potential Impacts to Airport 
Estimated 7,000 new stalls with pedestrian bridge
access to Airport 
Direct competition to Airport garage = $5M to
$11M annual impact on airport revenues 
Reduction in Airport's ability to fund critical
projects and community amenities