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Port of Harbor Island

USHJS🇺🇸USA

Port Location

About Port of Harbor Island

This artificial island in Seattle's Duwamish River estuary handles containerized cargo and bulk petroleum. It features shipbuilding and repair facilities, and requires pilotage and tug assistance.

Background
Harbor Island is an artificial island in the mouth of the Duwamish River in Seattle, Washington, United States, where it empties into Elliott Bay. Built by the Puget Sound Bridge and Dredging Company, it was completed in 1909 and was then the largest artificial island in the world, at 350 acres (1.4 km2). Since 1912, the island has been used for commercial and industrial activities including secondary lead smelting, shipbuilding and repair, bulk petroleum storage, metal fabrication and containerized cargo shipping. Warehouses, laboratories and other buildings are located on the island.

Current Conditions

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Vessel Limits

Channel Depth
9ft
Tidal Range
2ft
Elevation
6m

Operations & Services

Port of Entry
Yes
Pilotage Compulsory
Yes
Tug Assistance
Yes
Cranes
Fixed, Mobile, Floating
Drydock
S
Repair Code
A

References & Identifiers

WPI No.
17730 →
GeoNames ID
7274366 →
Wikidata
Q3127308 →
Wikipedia
Read on Wikipedia →
Official Site
www.portseattle.org →

Identification

UN/LOCODE
USHJS
Country
🇺🇸USA
Time Zone
UTC-5
Feature Type
MAR (Marina)

Classification

Type
Marina
Harbor Type
Coastal natural
Shelter
Excellent

Region

Subdivision
US-TX
Area
US West Coast
Latitude
47.5697°
Longitude
-122.3460°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do I navigate the approach to the Port of Harbor Island?+
The approach to Harbor Island is supported by 5 navigation aids within 50 nautical miles. The nearest is Alki Point Lighthouse at 3 NM to the W. Other aids include Swiftsure (3.5 NM N), West Point (6.6 NM NNW), Point Robinson (11 NM S), Browns Point (16.3 NM SSW). Mariners should consult the relevant chart and List of Lights for full approach details.
What major shipping routes pass near the Port of Harbor Island?+
The Port of Harbor Island is located within the US West Coast shipping lane — a major trans-Pacific trade route serving West Coast ports of the United States. This strategic position influences vessel traffic density, anchorage availability, and port scheduling.
How do I track vessels arriving at or departing from the Port of Harbor Island?+
You can track vessels near Harbor Island (USHJS) in real time using MarineRadar. The platform displays live AIS positions of nearby ships, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page or search for USHJS on the live map.
What are the operating hours and time zone for the Port of Harbor Island?+
The Port of Harbor Island operates in the UTC-5 time zone. Operating hours, VTS schedules, and pilot availability vary — vessel agents should confirm with the port authority in advance, especially for night arrivals or weekend operations.