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    A large container ship navigates a busy harbor with towering cranes and warehouses alongside the waterway

    The Northwest Seaport Alliance

    Washington
    West Coast

    Overview

    The Northwest Seaport Alliance is a major marine cargo operating partnership, uniting the ports of Seattle and Tacoma in Washington State. Established in 2015, this alliance is the fourth-largest container gateway in North America and serves as a critical hub for both international and domestic trade across the Pacific Rim. Its facilities are strategically located to enable shortened U.S.-to-Asia transit times and efficient links to Alaska, handling 80% of all trade between Alaska and the contiguous United States, as well as being a key facilitator of trade with Hawaii. The alliance drives significant economic impact, with more than $73 billion in international trade passing through its terminals, supporting over 48,000 jobs and generating $4.3 billion in local revenue. Notably, The Northwest Seaport Alliance has received recognition for its commitment to environmental stewardship through initiatives aimed at reducing emissions and promoting sustainable port operations. As a vital trade gateway for goods moving from the U.S. to Asia and other global markets, the alliance’s role in Pacific trade makes it an indispensable link in global supply chains. Modernization plans and streamlined operations further enhance its status as one of the most significant seaport collaborations in North America.

    Facilities

    • Terminal 5 (Port of Seattle)
    • Terminal 18
    • Terminal 30
    • Pier 46
    • Husky Terminal (Tacoma)
    • West Sitcum Terminal (Tacoma)
    • Blair Terminal (Tacoma)
    • TOTE Terminal
    • SSA Marine Terminal

    Operating Hours

    Most terminals operate from Monday to Friday, 7:00am - 4:00pm; additional night and weekend gates are scheduled as needed, subject to vessel schedules and operator announcements.

    Shipping Lines

    Major carriers serving this port

    1
    Maersk
    2
    MSC Mediterranean Shipping Company
    3
    CMA CGM
    4
    Hapag-Lloyd
    5
    COSCO Shipping Lines
    6
    Matson
    7
    ONE (Ocean Network Express)
    8
    OOCL

    Tools & Resources

    Essential tools, portals, and resources for clients and partners.

    Data & Reports

    Official statistics, research reports, and data tracking for The Northwest Seaport Alliance.

    Location & Maps

    Find The Northwest Seaport Alliance on popular mapping services.

    Frequently Asked Questions

    Common inquiries about operations and logistics at The Northwest Seaport Alliance.

    What is the process and how long does customs clearance take for import cargo through US seaports?

    Typical import flow is vessel arrival, berth assignment, container discharge, customs review, release, dray pickup, and final delivery. Standard clearance may be same day to several days depending on documentation and exams.

    What is the process and how long does export cargo take through US seaports?

    Typical export flow is inland dray to terminal, terminal gate-in, documentation and filing, vessel loading, and departure. Timing depends on cutoff windows, bookings, inspections, and vessel schedule.

    For More Info

    Third-party resources, government portals, ratings, and more.

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