UN/LOCODE: CASNI📍 Canada
Port of Sarnia (UN/LOCODE CASNI)
❖ Coordinates: 42.9745°N, -82.4066°E
❖ Time Zone: America/Toronto
❖ UN/LOCODE: CASNI
## About the Port
The Port of Sarnia (UN/LOCODE: **CASNI**) is a strategically vital freshwater deep-sea port situated on the eastern bank of the St. Clair River in Southwestern Ontario, Canada. Positioned at coordinates 42.9745° N, 82.4066° W, it serves as the primary maritime gateway for the "Chemical Valley" industrial complex and functions as a critical node within the Great Lakes–St. Lawrence Seaway System (GLSLS). Unlike coastal ports, Sarnia operates exclusively within the freshwater ecosystem of the Great Lakes, handling predominantly domestic and bi-national (US-Canada) bulk cargo movements.
The port falls under the jurisdiction of the **Sarnia Harbour Commission**, a local port authority established under the *Canada Marine Act*. It operates within the America/Toronto timezone (EST/EDT) and maintains a 24/7, year-round operational mandate, though navigation is seasonally constrained by ice cover typically from late December through March, necessitating icebreaker support from the Canadian Coast Guard (CCG) and the US Coast Guard (USCG) to maintain the shipping channel. The harbour limits extend from the Blue Water Bridge southward to the Sombra Township boundary, encompassing a dredged channel maintained to a controlling depth of 27 feet (8.2 m) Low Water Datum (LWD), accommodating Seawaymax vessels (maximum 740 ft / 225.6 m LOA, 78 ft / 23.8 m beam).
## History
Maritime activity at the Sarnia site predates Confederation, originating as a natural anchorage for the fur trade and early settlement supply lines in the early 19th century. The community, initially known as "The Rapids," was renamed Sarnia (Latin for Guernsey) in 1836. The port’s modern trajectory began with the arrival of the Great Western Railway in 1858, linking the harbour to the North American rail network and establishing Sarnia as a primary rail-marine interface.
A pivotal inflection point occurred during World War II with the establishment of the **Polymer Corporation** (1942), a Crown corporation built to produce synthetic rubber for the Allied war effort. This catalyzed the development of the adjacent "Chemical Valley," transforming the port from a general cargo and package freight terminal into a specialized bulk liquid and petrochemical hub. The opening of the St. Lawrence Seaway in 1959 further solidified its status by allowing direct ocean-going vessel access to the heart of the continent.
The 1998 *Canada Marine Act* devolved federal harbour management to the local Sarnia Harbour Commission, enabling commercialized decision-making and capital reinvestment. In recent decades, the port has managed the decline of coal imports (due to Ontario’s coal-phase-out) by pivoting toward renewable feedstocks, project cargo for energy infrastructure, and increased petroleum coke and salt exports.
## Infrastructure & Facilities
The port’s infrastructure is heavily specialized for liquid and dry bulk handling, characterized by a high density of private terminal operators rather than public general cargo berths. Key facility clusters include:
### Liquid Bulk Terminals (Chemical Valley)
The dominant feature is the concentration of **petrochemical and refining docks** owned by major integrated energy companies:
* **Imperial Oil (Sarnia Refinery):** Operates multiple deep-draft berths capable of handling Aframax and Suezmax class vessels (via lightering or Seawaymax) for crude oil receipt and refined product export. Features high-volume pumping systems and vapor recovery units.
* **Shell Canada (Corunna/Scotford complex access):** Utilizes riverfront facilities for feedstock receipt (condensate, crude) and chemical product shipment.
* **Suncor Energy / Nova Chemicals / INEOS Styrolution:** Maintain dedicated finger piers equipped with articulated loading arms, nitrogen blanketing capabilities, and dedicated fire suppression systems compliant with NFPA 30 and Transport Canada TP 14850 standards.
### Dry Bulk & General Cargo
* **Sarnia Grain Terminal (Parrish & Heimbecker):** A high-throughput elevator with a storage capacity exceeding 2.5 million bushels, served by CN/CPKC rail lines and a modern marine leg capable of loading rates up to 40,000 bushels/hour.
* **Salt & Aggregate Docks:** **Compass Minerals (Goderich/Sarnia operations)** and **Morton Salt** utilize the port for rock salt export (de-icing markets) and aggregate import. Facilities feature radial stackers and reclaimers for high-volume stockpile management.
* **Project Cargo / Ro-Ro:** The **Sarnia Harbour Commission Wharf** provides heavy-lift pad eyes (SWL 100+ tonnes) and roll-on/roll-off ramps for oversized modules destined for refinery turnarounds, wind energy components, and nuclear reactor components (Bruce Power).
### Intermodal Connectivity
The port is served by **CN (Canadian National)** and **CPKC (Canadian Pacific Kansas City)** mainlines running directly onto the docks, facilitating unit train operations. Highway 402 provides immediate 4-lane divided access to the US border (Blue Water Bridge / I-69/I-94) and the Toronto-Windsor corridor (Highway 401).
## Economic Importance
The Port of Sarnia is the economic engine of Lambton County and a cornerstone of Ontario’s industrial GDP. It anchors **Canada’s largest petrochemical cluster**, representing approximately 40% of the nation’s chemical industry production capacity. The port handles an annual cargo volume averaging **15–18 million metric tonnes**, with a cargo value estimated in excess of **CAD $30 billion** annually.
Direct employment attributed to port-dependent industries exceeds 12,000 highly skilled jobs (process operators, engineers, marine pilots, logistics), with a multiplier effect supporting over 50,000 regional jobs. The harbour generates significant revenue through harbour dues, wharfage, and property taxes levied on the ~60+ industrial tenants lining the riverfront.
Strategically, the port provides **energy security** for Central Canada. It facilitates the import of Western Canadian Select (WCS) and Bakken crude via rail and pipeline (Enbridge Line 5/78 corridor crossing the St. Clair River nearby) for refining, and the export of gasoline, diesel, jet fuel, and petrochemical feedstocks (ethylene, propylene, benzene) to Great Lakes markets and overseas via the Seaway. The facility is also critical for the **Great Lakes salt supply chain**, moving millions of tonnes of de-icing salt to municipalities across the basin.
## Trade Routes & Major Cargo
### Cargo Profile (Tonnes)
| Commodity Group | Direction | Primary Trade Lanes |
| :--- | :--- | :--- |
| **Crude Oil / Feedstocks** | Inbound | Western Canada (rail/pipe), US Midwest (pipeline), North Dakota (rail) |
| **Refined Products** | Outbound | Great Lakes Ports (Thunder Bay, Duluth, Milwaukee, Toronto, Hamilton), Seaway Export (Europe) |
| **Petrochemicals (Liquid)** | Bi-directional | US Gulf Coast (feedstock), Great Lakes Regional Distribution, Overseas Export |
| **Salt (Rock/Solar)** | Outbound | Great Lakes Ports (Chicago, Cleveland, Detroit, Green Bay), St. Lawrence River Ports |
| **Grain (Wheat/Corn/Soy)** | Outbound | Seaway Export (North Africa, EU, South America), Domestic (Quebec/Maritimes) |
| **Petroleum Coke / Coal** | Outbound | US Great Lakes (cement kilns, power gen), Overseas (limited) |
| **Project Cargo** | Inbound | Global (Europe, Asia) via Seaway; Domestic fabrication yards |
### Navigation & Routing
Vessels transit the **St. Clair River / Lake St. Clair / Detroit River** corridor—a high-traffic, narrow channel requiring mandatory **Great Lakes Pilotage** (administered by the Great Lakes Pilotage Authority Canada). The route connects Lake Huron (North) to Lake Erie (South).
* **Domestic (Laker) Fleet:** The backbone of traffic. 1,000-ft Class "Super Lakers" (e.g., *Paul R. Tregurtha*, *Edwin H. Gott*) move iron ore, coal, and stone; Seawaymax tankers (e.g., Algoma Central, Lower Lakes Towing fleets) dominate the liquid chemical and petroleum trades.
* **International (Salty) Fleet:** Ocean-going vessels (Handysize/Handymax) transit the Montreal/Lake Ontario section of the Seaway (lock constraints: 766 ft x 80 ft x 26.5 ft draft) to load grain at P&H or specialized project cargo. These vessels often top-off at Quebec City or transload at Sorel/Tracy.
* **US-Canada Cross-Border:** Significant "short-sea" shipping occurs between Sarnia and Midwest US ports (Detroit, Toledo, Ashtabula, Calcite) under the *Jones Act* (US) and *Coasting Trade Act* (Canada) exemptions for specific bulk trades.
The port’s future trajectory is defined by **decarbonization**. Investments are accelerating in **biofuels (renewable diesel/SAF)**, **carbon capture utilization and storage (CCUS)** infrastructure (e.g., the proposed *Southwestern Ontario Carbon Hub*), and **hydrogen/ammonia** import/export terminals, positioning CASNI as a future low-carbon energy hub. For detailed Great Lakes vessel tracking and Seaway regulations, refer to the Great Lakes St. Lawrence Seaway System↗ official authority. Regulatory oversight for dangerous goods handling aligns with Transport Canada Marine Safety↗ standards.
Port Intelligence
UN/LOCODE
CASNI
Country
Canada
Province / Region
Ontario
Latitude
42.974536
Longitude
-82.406590
Timezone
America/Toronto
Nautical Map (OpenSeaMap)
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Frequently Asked Questions
What is the UN/LOCODE for Port of Sarnia?
The official UN/LOCODE for Port of Sarnia is CASNI.
Where is Port of Sarnia located?
The Port of Sarnia is located in Canada, Ontario. Its coordinates are 42.9745°N, -82.4066°E.
What time zone is Port of Sarnia in?
Port of Sarnia operates in the America/Toronto time zone.
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About the World Port Index
This data is sourced programmatically. The UN/LOCODE is the official geographic coding scheme used by the United Nations for trade and transport locations.
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