H.R. 4375House119th Congress (2025-2027)In Committee

Great Lakes Icebreaker Act of 2025

Introduced July 14, 2025

AI-Generated Summary

Updated November 23, 2025 at 11:32 PM UTC

The Great Lakes Icebreaker Act of 2025 directs the Coast Guard to create and submit a strategy for designing and building a new icebreaker for the Great Lakes, and to run a five‑year pilot to assess the fleet’s ability to keep major waterways open during winter. It also updates reporting requirements so Congress receives regular cost and performance updates. The bill mainly affects the Coast Guard, Great Lakes shipping routes, and the congressional committees overseeing transportation and defense.

Key Provisions

  • Within 90 days of the law’s enactment, the Coast Guard Commandant must send Congress a detailed plan for designing and building a new Great Lakes icebreaker that matches or exceeds the capabilities of the cutter Mackinaw, including cost and delivery estimates.
  • For the next five ice seasons, the Commandant must run a pilot program to test how well the Great Lakes ice‑breaking fleet can keep top‑priority waterways open at least 95% of the time during winter.
  • After each of those five seasons, the Commandant must report to the relevant Senate and House committees on the pilot’s results and on any new performance measures the Coast Guard has adopted.
  • The bill amends existing Coast Guard reporting rules so the Commandant must publish a public cost report on meeting the new ice‑breaking standards and brief the same committees on the costs for fiscal years 2024‑2026.

Legislative Activity

Stay on top of the latest movement without scrolling through every action

2 earlier actions
HouseCommittee Latest Action

Referred to the Subcommittee on Coast Guard and Maritime Transportation.

July 15, 2025

View full timeline
HouseIntro Referral

Introduced in House

July 14, 2025

HouseIntro Referral

Referred to the House Committee on Transportation and Infrastructure.

July 14, 2025

HouseCommittee

Referred to the Subcommittee on Coast Guard and Maritime Transportation.

July 15, 2025

Bill Text

Latest available legislative text

Reading Mode
Latest
Introduced in HouseIssued July 14, 2025

I

119th CONGRESS

1st Session

H. R. 4375

IN THE HOUSE OF REPRESENTATIVES

July 14, 2025

Ms. McDonald Rivet (for herself, Mr. Wied, and Mr. Miller of Ohio) introduced the following bill; which was referred to the Committee on Transportation and Infrastructure

A BILL

To direct the Commandant of the Coast Guard to submit to Congress a strategy detailing how the Coast Guard will complete design and construction of a Great Lakes Icebreaker, and for other purposes.

1.

Short title

This Act may be cited as the Great Lakes Icebreaker Act of 2025.

2.

Great Lakes icebreaking

(a)

Great Lakes Icebreaker

(1)

Strategy

Not later than 90 days after the date of enactment of this Act, the Commandant shall submit to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a strategy detailing how the Coast Guard will complete design and construction of a Great Lakes icebreaker at least as capable as the Coast Guard cutter Mackinaw (WLBB–30) as expeditiously as possible after funding is provided for such icebreaker, including providing a cost estimate and an estimated delivery timeline that would facilitate the expedited delivery detailed in the strategy.

(2)

Great Lakes icebreaker pilot program

(A)

In general

During the 5 ice seasons beginning after the date of enactment of this Act, the Commandant shall conduct a pilot program to determine the extent to which the Coast Guard Great Lakes icebreaking cutter fleet is capable of maintaining tier one and tier two waterways open 95 percent of the time during an ice season.

(B)

Report

Not later than 180 days after the end of each of the 5 ice seasons beginning after the date of enactment of this Act, the Commandant shall submit to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a report that details—

(i)

the results of the pilot program required under subparagraph (A); and

(ii)

any relevant new performance measures implemented by the Coast Guard, including the measures described in pages 5 through 7 of the report of the Coast Guard titled Domestic Icebreaking Operations and submitted to Congress on July 26, 2024, as required by section 11212(a)(3) of the Don Young Coast Guard Authorization Act of 2022 (Public Law 117–263), and the results of the implementation of such measures.

(b)

Modification to reporting requirement relating to icebreaking operations in Great Lakes

(1)

In general

Section 11213(f) of the Don Young Coast Guard Authorization Act of 2022 (Public Law 117–263) is amended to read as follows:

(f)

Public report

Not later than July 1 after the first winter in which the Commandant has submitted the report required by paragraph (3) of section 11212(a), the Commandant shall publish on a publicly accessible website of the Coast Guard a report on the cost to the Coast Guard of meeting the proposed standards described in paragraph (2) of such section.

.

(2)

Public report

Section 11272(c) of the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023 is amended by adding at the end the following:

(7)

Public report

(A)

In general

Not later than 30 days after the date of enactment of the Coast Guard Authorization Act of 2025, the Commandant shall brief the Committee on Transportation and Infrastructure of the House or Representatives and the Committee on Commerce, Science, and Transportation of the Senate on the cost to the Coast Guard of meeting the requirements of section 564 of title 14, United States Code, in fiscal year 2024.

(B)

Secondary briefings

Not later than November, 2025 and November, 1, 2026, the Commandant shall brief the committees described in subparagraph (A) on the cost to the Coast Guard of meeting the requirements of section 564 of title 14, United States Code, in fiscal years 2025 and 2026, respectively.

.