# Broadcast Notices to Mariners Message | Navigation Center

> The U.S. Coast Guard Ohio Valley issued a safety advisory limiting tow sizes on the Upper Mississippi River due to low water, recommending no more than 20 downbound and 25 upbound barges. Mariners were warned of rock pinnacles and missing buoys in several river reaches.

- Date: 2025-04-21 · published 2025-04-21T12:00:00.000Z
- Category: logistics · region US · magnitude medium
- Page: https://feedsoft.ai/events/16457-broadcast-notices-to-mariners-message-navigation-center
- Commodities: [Barge Freight (St. Louis)](https://feedsoft.ai/c/BARGE.md), [Corn](https://feedsoft.ai/c/CORN.md), [Soybeans](https://feedsoft.ai/c/SOY.md)

## Why it matters

Reduced tow sizes and navigation hazards cut barge capacity and raise per-ton freight costs, widening interior basis for grains moving to the Gulf.

## Read by commodity

- SOY: bearish ▼
- CORN: bearish ▼
- BARGE: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2024-06-28 | [Army Corps of Engineers Expects Challenges with Mississippi River Navigation - ProAg](https://feedsoft.ai/events/29952-army-corps-of-engineers-expects-challenges-with-mississippi-river-navigation.md) | -0.3% | -0.9% |
| CORN | 2022-01-14 | [Ice, Low Water Affecting Navigation - The Waterways Journal](https://feedsoft.ai/events/16733-ice-low-water-affecting-navigation-the-waterways-journal.md) | -0.1% | +6.0% |
| CORN | 2023-12-20 | [Mississippi River Drought Affects Navigation - America's Engineers](https://feedsoft.ai/events/16582-mississippi-river-drought-affects-navigation-america-s-engineers.md) | +3.1% | -1.9% |
| CORN | 2018-03-02 | [High water disrupts navigation across much of Mississippi](https://feedsoft.ai/events/65885-high-water-disrupts-navigation-across-much-of-mississippi.md) | +1.2% | +3.0% |
| CORN | 2022-11-04 | [Information note by the UN Secretariat at the Joint Coordination Centre \| United Nations](https://feedsoft.ai/events/14437-information-note-by-the-un-secretariat-at-the-joint-coordination-centre-united.md) | -0.9% | -4.5% |
| SOY | 2024-06-28 | [Army Corps of Engineers Expects Challenges with Mississippi River Navigation - ProAg](https://feedsoft.ai/events/29952-army-corps-of-engineers-expects-challenges-with-mississippi-river-navigation.md) | +3.1% | -6.5% |
| SOY | 2022-01-14 | [Ice, Low Water Affecting Navigation - The Waterways Journal](https://feedsoft.ai/events/16733-ice-low-water-affecting-navigation-the-waterways-journal.md) | +3.6% | +15.9% |
| SOY | 2018-03-02 | [High water disrupts navigation across much of Mississippi](https://feedsoft.ai/events/65885-high-water-disrupts-navigation-across-much-of-mississippi.md) | -0.4% | -1.2% |

## Sources

- navcen.uscg.gov: https://www.navcen.uscg.gov/broadcast-notice-to-mariners-message?guid=64814805

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