Coast Guard Begins Spring Ice Breaking Operations

Crews work to clear waterways ahead of 2026 Great Lakes shipping season

Published on Mar. 9, 2026

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The U.S. Coast Guard has commenced its annual ice breaking operations in the Duluth Harbor and along the St. Marys River, preparing the waterways for the upcoming 2026 commercial shipping season on the Great Lakes. The initial work will focus on the Duluth Harbor, Munuscong (Mud) Lake, and the Middle Neebish Channel, with plans to expand into other areas of the St. Marys River as the week progresses.

Why it matters

The Coast Guard's ice breaking efforts are crucial to ensuring the safe and timely start of the Great Lakes shipping season, which is a vital economic driver for the region. These operations help clear the way for cargo ships, freighters, and other commercial vessels to navigate the waterways and deliver essential goods and materials.

The details

The Coast Guard will be conducting ice breaking missions across all navigable waterways on the St. Marys River, as well as the Straits of Mackinac and Green Bay. They do not plan to break ice south of West Neebish Channel Light 45, above the ferry crossing, nor north of Moon Island below the ferry crossing. Recreational users are urged to exercise caution and avoid marked navigation areas, as the ice breaking operations can create hazardous and unpredictable conditions.

  • The Coast Guard began ice breaking operations on Monday, March 9, 2026.
  • The Soo Locks are slated to open on March 25, 2026.

The players

U.S. Coast Guard

The U.S. Coast Guard is the principal federal agency responsible for maritime safety, security, and environmental protection in the United States.

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The takeaway

The Coast Guard's annual ice breaking operations are a critical step in preparing the Great Lakes waterways for the upcoming commercial shipping season, which is essential for the regional economy. These efforts help ensure the safe and efficient movement of cargo and materials across the lakes, while also cautioning recreational users to exercise caution in the affected areas.