Interlocal Agreements

State law permits a local government to enter into interlocal agreements with other public agencies in the interest of cooperatively sharing resources for their mutual benefit.

In accordance with RCW 39.34.040, The Northwest Seaport Alliance has executed interlocal agreements with other public agencies for various purposes over the years. Under the law, a public agency can file interlocal agreements with the County Auditor or post them on its website.

Interlocal Agreements

Contract Municipality Title Start Date End Date
  Port of Tacoma 2025 Support Services - SLAs amended 03/17/2025 12/31/2025
  Port of Seattle 2025 Support Services - SLAs 01/01/2025 12/31/2025
  Port of Tacoma 2025 Support Services - SLAs 01/01/2025 12/31/2025
  Port of Tacoma NWSA's Use of the 11th Viaduct Property 09/04/2024 12/31/2033
  Port of Tacoma NWSA's Use of Property at 4012 SR 509 S Frontage Road, Tacoma, WA 98421 06/05/2024 Notice
072124 POT & POS Economic Impact Analysis 2024 04/02/2024 06/30/2025
072079 POT Use of 2340 E Alexander Ave. (East Blair 1 Terminal) 01/01/2024 12/31/2036
072063 POS 2024 Support Services 01/01/2024 12/31/2024
  Port of Tacoma 2024 Support Services Amendment  01/01/2024 12/31/2024
072061 POT 2024 Support Services 01/01/2024 12/31/2024
071968 NOAA Management, Operation, Maintenance, and Repair of NOAA’S Tacoma and Seattle Physical Oceanographic Real-Time Systems 09/07/2023 07/31/2028
071964 POT Use of Properties at 4215 SR 509 N Frontage Rd.; 2302 Ross Way; 1701 Port of Tacoma Rd. 9/11/2023 TBD
071935 University of Washington Washington Sea Grant Program 09/16/2023 09/30/2024
  Port of Seattle First Addendum to ILA re POS's use of T-106 W (reimburse cost to move ConGlobal mobile office) 08/04/2023 12/31/2026
071933 POS Port of Seattle's use of a portion of Terminal 106 West 05/13/2021 12/31/2026
071893 POT Implementation of the Glovis 2020 Use Agreement 04/18/2023 02/28/2029
071892 POT Use of Property at 1202 Port of Tacoma Road 04/04/2023 TBD
071835 POS T46-1st Amended & Restated Crane Use 10/04/2022 09/01/2026
071834 POT & POS Federal Agency Permit Staffing Support 09/22/2022 08/31/2027
07177 Various Ports Federal Permit Review Liaisons   12/31/2027
071729 POT Management Services Agreement 09/01/2020 TBD
071324 Muckleshoot Indian Tribe | Suquamish Indian Tribe Seattle Harbor Navigation Improvement Project 05/14/2018 TBD
071842 NOAA, NMFS, US Dept of Commerce & US Fish and Wildlife Svc & US Dept of Interior Memorandum of Agreement 09/22/2022 9/22/27
071843 WSDOT Establish Zero Emissions Truck Collaborative 11/15/2022 TBD
071846 POT 1451 and 1721 Thorne Road 12/05/2022 12/31/2023