PORT OF SEATTLE 

 

MEMORANDUM

 

COMMISSION AGENDA – STAFF BRIEFING 

Item No. 

7c 

 

Date of Meeting 

May 12, 2009 

 
 
DATE: 

April 27, 2009

 

 

TO:

     

The Port of Seattle Commission 

 

FROM:

  

James R. Schone, Director, Aviation Business Development 

 

 

W. Allan Royal, Manager, Port Real Estate Development 

 

 

 

SUBJECT:

 

Staff briefing regarding a future Resolution declaring surplus nine parcels of Port-
owned real property needed by Washington State Department of Transportation 
(WSDOT) for future SR509 expansion to Interstate 5 and authorizing transfer of 
said parcels to WSDOT in exchange for WSDOT property and certain airspace 
leases needed for current and future Aviation projects. 

 

EXECUTIVE SUMMARY OF TODAY’S BRIEFING

:   

 
The proposed surplus and exchange of properties at the airport between the Port and WSDOT 
continues a history of cooperation between the two agencies.  At Sea-Tac International Airport, 
the Port, WSDOT and local cities have participated in development of the SR509/South Access 
environmental review and design since the early 1990s.  Additional cooperative efforts have 
included the SR518 Route Development plan, property purchases, and the widening of SR 518 
eastbound between the Airport and the I-5 and I-405 interchange.  Near the Seaport, the Port has 
invested funds in SR519 improvements near the waterfront, and works cooperatively on the 
replacement of the Alaskan Way Viaduct planning and other projects to maintain and enhance 
freight mobility and facility access. 
 
This briefing outlines the proposed

 

mutually beneficial property exchange between the Port and 

WSDOT.  Fifteen different parcels are involved; where some are helpful to Airport projects and 
business developments, while others are helpful to WSDOT in accumulating the needed right-of-
way for the future SR509 extension.  The planned future SR509 extension has state, regional and 
local benefits: 

 

Improves congestion on Interstate 5, particularly at Southcenter Hill   

 

Provides for more direct cargo movements between Seattle’s industrial areas and I-5, 
including the Green River Valley 

 

Would allow a more direct freeway route for airport traffic to and from the south (if 
necessary)  

 

Improves access for local cities 

 

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