COMMISSION 
AGENDA MEMORANDUM                        Item No.          8a 
ACTION ITEM                            Date of Meeting      October 8, 2019 
DATE:     September 18, 2019 
TO:        Stephen P. Metruck, Executive Director 
FROM:    James Schone, Director, Aviation Commercial Management 
James Jennings, Senior Manager, Aviation Properties 
W. Allan Royal, Property Manager, Aviation Properties 
SUBJECT:  Introduction of Resolution 3762 and public comment on sale of real property,
portions of King County parcels #344500-0141 and #344500-0155, to the State of Washington
Department of Transportation (WSDOT).
ACTION REQUESTED 
Request introduction and public hearing for Resolution No. 3762: A Resolution of the Port of
Seattle  Commission  declaring  surplus  and  no  longer  needed  for  port  district  purposes
approximately 417,963 square feet (9.6 acres) of Port-owned real property located in the City of
SeaTac, King County; and further authorizing the Executive Director, or his designee, to finalize
negotiation, prepare and execute all necessary documents to transfer said real property to
WSDOT for use in the extension of SR-509 in connection with WSDOT's SeaTac to I-5 Freeway
Extension/SR-509 Corridor Completion Program Phase I Project 
EXECUTIVE SUMMARY 
The sale of a portion of King County parcels #344500-0141 and #344500-0155, will allow
WSDOT to develop an off-ramp from the south bound SR 509 to the Airport.
The Port will receive $7,410,000 for the property, plus an additional amount of $397,793.29
that WSDOT owes the Port from a historical 2009 land swap; for a total  amount  of
$7,807,793.20.
The addition of a freeway exit, will enable the potential future development of South Access to
the Airport.  Although no Port commitments have been made, South Access has been
contemplated in the long-term planning for the Airport and memorialized as a subject of study
in multiple resources, such as Amendment 1 to the 2005 Inter-Local agreement with the City of
SeaTac, the 1999 memorandum from the South Access Executive Committee, and others. It is a
vision that will create a connection between SR 509 and the Airport.


Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. 8a                                   Page 2 of 4 
Meeting Date: October 8, 2019 
The acquisition is under threat of condemnation.  The WSDOT purchase offer has been
reviewed and approved by a Port Member Appraisal Institute (MAI) appraiser. The value of the
property is $7,410,000. 
In addition to the sale of the property, WSDOT and Port staff will resolve a credit that the Port
has with WSDOT from the major land swap agreement between WSDOT and the Port, in 2009.
JUSTIFICATION 
The completion of this transaction will bring the Airport one-step closer to developing freeway
access from the south, which will significantly relieve traffic on the north freeway access to the
Airport.    The  effort  helps meet the Century Agenda Goal of "Meet the region's air
transportation needs at SeaTac airport for the next 25 years" by creating efficiencies in access
to the Airport. 
DETAILS 
The properties were purchased under the Port's Federal Aviation Administration  (FAA)
approved Part 150 Noise program. This subject property, now vacant, was the site of a mobile
home park until 2010. In 2014 , the Port agreed to sell a portion of the mobile home park to the
City of SeaTac for the extension of 28th Avenue South to 24th Avenue South in Des Moines, thus
connecting the Airport to the major developments in the Des Moines Creek Business Park.
WSDOT's purchase is atfair market value based upon appraisal and review appraisal. WSDOT
submitted a MAI appraisal supporting their opinion of the fair market value, rather than
commissioning a separate full appraisal. The Port elected to have the WSDOT appraisal
reviewed by another MAI appraiser who provided input to the Port as to the validity of the
WSDOT appraisal.
This transaction also reconciles the credit the Port has with WSDOT related to the WSDOT/Port
of Seattle land swap in 2009. 
The historic 2009 land swap between the Port and WSDOT provided the Port with these key
elements; 
The additional land required to enable the Rental Car Facility project. 
Three agreements to support additional Port objectives: 
o  Soil Nail Wall lease that permitted anchoring points, under State Route 518 (SR
518), for the retention wall north of the Rental Car Facility. 
o  A right for a future bridge, over SR 518, from property north of SR 518 to the
Airport. 
o  A lease for the approach lighting system for Runway 16R across SR 518. 


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

COMMISSION AGENDA  Action Item No. 8a                                   Page 3 of 4 
Meeting Date: October 8, 2019 
The land swap was designed as a non-cash transaction. However, in the $16M transaction the
Port ended up with a credit from WSDOT of $758,020. The credit the Port has with WSDOT was 
utilized to pay for the lease payments for the Soil Nail Wall, the right for a future bridge and the
approach lighting system with the understanding that the Port preferred long-term easements
instead of leases. WSDOT agreed to pursue the long-term easements but did not want to hold
up the land swap. It took numerous years, but the long-term easements are now in place for
the Soil Nail Wall and Approach Lighting System. The right for a bridge over SR 518 was not
included in the change from a lease to a long-term easement because it is not a lease. The right
for a potential future bridge over SR 518 will continue to be a $2,000 expense per year and is
included in the 2020 budget requests. 
The Port expended $360,226.19 of the credit for the leases between 2009 and their conversion
to long-term easements. However, there still remains a credit balance of $397,793.29 that will 
be paid to the Port in connection with this transaction.
It is important to note, that the FAA is expected to approve sale of this property prior to
Commission action. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Do not sell the property to WSDOT. 
Cost Implications: No cost implications 
Pros: 
(1)   The site could be available for a, yet undetermined, future use. 
Cons: 
(1)   The Port would not receive the $7,410,000 for the property. 
(2)   WSDOT could institute a condemnation action. 
(3)   The Port would not have a key component for the development of south access. 
This is not the recommended alternative. 
Alternative 2  Sell the property to WSDOT. 
Cost Implications: No cost implications 
Pros: 
(1)   The Port would receive fair market value for the property, $7,410,000. 
(2)   The Port would accomplish a key step in the future development of south access. 
Cons: 
(1)   The property would not be available for an alternative use. 
This is the recommended alternative. 

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

COMMISSION AGENDA  Action Item No. 8a                                   Page 4 of 4 
Meeting Date: October 8, 2019 
FINANCIAL IMPLICATIONS 
The proceeds of the sale are partially restricted to reinvestment to AIP eligible projects. 
The sale of this property will result in a book loss of $11,788,897.59 on the sale. 
ATTACHMENTS TO THIS REQUEST 
(1)   Draft Resolution No. 3762 
(2)   WSDOT Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
June 9, 2009 - Commission approved Resolution 3617; a land swap with WSDOT. 














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