# Seaway strike halts St. Lawrence shipping

> A strike by about 360 Unifor port workers on the St. Lawrence Seaway began October 22 and halted shipping, with at least 100 ships on hold. Workers returned after a tentative agreement pending ratification, and business groups estimated losses near $900 million.

- Date: 2023-11-13 · published 2023-11-13T12:00:00.000Z
- Category: logistics · region Canada · magnitude medium
- Page: https://feedsoft.ai/events/33189-seaway-strike-halts-st-lawrence-shipping
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md), [Wheat (SRW)](https://feedsoft.ai/c/WHEAT.md), [Ocean Grain Freight](https://feedsoft.ai/c/OCEANFRT.md)

## Why it matters

Grain from Western Canada moves east through the Seaway, so the closure delayed exports and tied up storage, pressuring Canadian grain basis and freight; with the strike resolved, the impact should fade.

## Read by commodity

- CORN: neutral
- WHEAT: neutral
- OCEANFRT: neutral

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2023-11-02 | [Labor Agreements End Strike and Reopen Seaway System](https://feedsoft.ai/events/33192-labor-agreements-end-strike-and-reopen-seaway-system.md) | +1.4% | -2.0% |
| CORN | 2017-02-24 | [Barge Glut Chokes U.S. Shipping Sector Despite Record Harvest](https://feedsoft.ai/events/72373-barge-glut-chokes-u-s-shipping-sector-despite-record-harvest.md) | +1.5% | -1.7% |
| CORN | 2020-02-25 | [2019 River Shipping Season Disappointing as Flooding Took Its Toll](https://feedsoft.ai/events/54494-2019-river-shipping-season-disappointing-as-flooding-took-its-toll.md) | +0.4% | -4.8% |
| CORN | 2025-02-12 | [Shipping disruptions ease - AgWest Farm Credit](https://feedsoft.ai/events/16968-shipping-disruptions-ease-agwest-farm-credit.md) | +3.1% | -5.1% |
| CORN | 2023-11-02 | [Farmers call for quick resolution to Seaway workers’ strike – The North Grenville Times](https://feedsoft.ai/events/33191-farmers-call-for-quick-resolution-to-seaway-workers-strike-the-north-grenville.md) | +1.4% | -2.0% |
| WHEAT | 2026-03-12 | [Tug strike disrupts grain loading at France's Rouen port](https://feedsoft.ai/events/20199-tug-strike-disrupts-grain-loading-at-france-s-rouen-port.md) | -0.2% | -2.1% |
| WHEAT | 2022-05-24 | [Wheat industry shines light on rail shipping challenges](https://feedsoft.ai/events/41439-wheat-industry-shines-light-on-rail-shipping-challenges.md) | -0.7% | -2.5% |
| WHEAT | 2019-11-19 | [UPDATED: CN Rail strike will impact grain shipments (2 Photos)](https://feedsoft.ai/events/56082-updated-cn-rail-strike-will-impact-grain-shipments-2-photos.md) | +1.1% | -0.2% |

## Sources

- qcna.qc.ca: https://qcna.qc.ca/seaway-strike-halts-st-lawrence-shipping/

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.