Terminals, rail ramps, and equipment depots in Seattle

Seattle cargo uses several waterfront districts, and some familiar terminal names no longer describe an active container pickup. Terminal 5 is in West Seattle, Terminal 18 is on Harbor Island, Terminal 46 serves different cargo, and Terminal 30’s container operation is paused under the port authority’s published notice. Alaska Marine Lines adds a specialized barge-receiving operation farther along West Marginal Way.

These distinctions matter before a truck is assigned. An old bill of lading, a broad Port of Seattle address, or an assumed return to the discharge terminal can point to the wrong place. Begin with the current shipment release, then resolve the gate and equipment instructions for that movement.

Seattle harbor, rail, and depot references

Port and marine locations

Rail ramps

Equipment depots and yards

The Port of Seattle address on Alaskan Way is an authority reference, not a container collection gate. The cargo terminals operate within the Northwest Seaport Alliance’s Seattle harbor network. Tacoma has its own terminal district and guide.

Terminal 5, Terminal 18, and the Terminal 30 change

NWSA’s Terminal 5 listing identifies SSA as the operator at 3443 West Marginal Way Southwest, with FIRMS code Y400. Match the truck’s release to Terminal 5 and follow the operator’s current instructions for the visit.

Terminal 5’s on-dock rail is important for cargo moving beyond the region. It allows a booked shipment to connect with rail within the terminal operation, but it does not mean every container is available for local truck delivery. Establish whether the ocean booking includes an inland rail leg and which party is responsible for any local transfer.

Terminal 18 is the Harbor Island container operation at 1050 Southwest Spokane Street. NWSA identifies its SSA operator, container-tracking system, refrigerated infrastructure, and on-dock rail. Use the T18-specific tracking and release information rather than treating SSA’s Seattle facilities as a single yard. A corporate operator name is less precise than the terminal named on the arrival notice.

Terminal 30 requires a different explanation. The authority’s operational update states that operations paused on January 1, 2025, until further notice, with the identified container services moving to Terminal 5. If older paperwork names Terminal 30, confirm the current pickup terminal before assigning a truck.

If documents disagree, obtain a current terminal confirmation before dispatch. That is particularly important for cargo following an older service pattern: the historic discharge terminal may still appear in a customer’s internal instructions after the operating location has changed.

Breakbulk and Alaska-bound cargo have their own receiving process

Terminal 46 is listed by NWSA for autos and breakbulk. It is closer to downtown than the West Seattle and Harbor Island terminals. For a collection there, identify the cargo pieces, handling arrangement, truck equipment, and terminal contact. A vehicle or project-cargo delivery order requires more detail than an ocean-container number.

Alaska Marine Lines’ 6110 West Marginal Way address corresponds to its Seattle Terminal 115 receiving location. The operator publishes destination-specific receiving information for Central Alaska, Western Alaska and the Arctic region, and Hawaii. Its booking and receiving requirements should be checked against the actual destination and cargo type; another Alaska service can use a different receiving arrangement.

The published instructions require a booking number and completed bill of lading and direct customers to arrange delivery appointments, with a stated exception for certain LCL cargo. Read the relevant receiving guide rather than applying a single rule to every shipment. For machinery or oversize freight, confirm dimensions, weight, packaging, and unloading equipment before the road carrier arrives.

Barge departure and destination availability are separate milestones. Weather, sailing changes, and receiving arrangements at the destination can affect the onward plan. A Seattle drop-off appointment alone does not establish when a consignee in Alaska will be able to collect the goods.

SIG, ARGO, and South Seattle rail

NWSA lists BNSF SIG Yard as a near-dock rail facility at 44 South Hanford Street. Older South Massachusetts Street references should not displace that current published address. Match the railroad release to SIG and its current access instructions.

UP ARGO Yard is the Denver Avenue facility. A rail notification naming ARGO or Union Pacific Seattle should be passed to the driver as a railroad pickup, with the railroad’s release and container readiness information. The fact that it serves the harbor does not make a marine-terminal appointment valid there.

BNSF South Seattle is in Tukwila at the 51st Place South address. It creates a different road origin for Kent, Renton, and other south King County receivers than SIG or a central harbor terminal. BNSF’s facility listings are the source for the applicable facility instructions.

Where marine and rail legs connect, determine whether the transfer is on-dock, near-dock, or separately arranged by truck. Otherwise, a shipper can schedule a local carrier for a move already included in the booked transport, or overlook a transfer that still needs to be performed.

Duwamish equipment stops and the final truck itinerary

The ConGlobal South Idaho Street reference, Ray-Mont’s Southwest 16th Avenue reference, and Next Logistics in Tukwila are separate equipment-yard locations. Establish the agreed service and accepted equipment before arranging a visit. Storage, cargo transfer, empty-container interchange, and chassis work have different instructions even when a company can provide several of them.

For a Seattle delivery, trace the route from the actual harbor district through the receiver and onward to the authorized equipment destination. A return across the Duwamish or a separate Tukwila stop can materially change the schedule. Include any required lift and verify whether the receiving yard accepts a grounded container or expects it to remain on a chassis.

A pre-pull can help separate terminal collection from a later warehouse appointment, but it also introduces a holding location and another handling step. Agree on those arrangements before collection. The shipping and accessorial glossary explains the terms; the carrier’s plan should identify the actual Seattle stops, who controls the equipment at each stage, and when the next handoff can occur.