PolicyBrief
S. 4753
119th CongressJun 11th 2026
Port Modernization and Supply Chain Protection Act
IN COMMITTEE

This Act repeals the requirement that dredging in U.S. waters must be performed by U.S.-built and flagged vessels and removes dredged material transportation from certain regulatory requirements.

Mike Lee
R

Mike Lee

Senator

UT

LEGISLATION

Port Modernization Act Repeals U.S.-Built Vessel Requirements for Domestic Dredging Projects

The Port Modernization and Supply Chain Protection Act aims to speed up harbor upgrades by fundamentally changing who can dig out our waterways. For decades, Section 55109 of Title 46 has required that any dredging in U.S. waters—the essential process of clearing silt and sand so massive cargo ships don't get stuck—must be done by ships built in America and flying the U.S. flag. This bill repeals that requirement entirely. By opening the floor to foreign-built and foreign-flagged vessels, the legislation seeks to lower the costs and expand the fleet available for critical infrastructure projects at our nation’s ports.

Clearing the Path for Competition

Under Section 2, the bill also strips 'dredged material' from the transportation regulations in Section 55110. Think of it like this: if a local port needs to deepen its channel to welcome larger container ships carrying everything from electronics to auto parts, they currently have to hire from a limited pool of domestic dredging companies. By removing the U.S.-build requirement, a port authority could theoretically hire a specialized international dredging firm that might offer a lower bid or have more advanced equipment ready to go. This could lead to faster project completions and lower costs for taxpayers and consumers who ultimately foot the bill for port infrastructure.

Waves of Change for Maritime Workers

While the bill might make it cheaper to widen a canal, it hits the 'reset' button on protections for the domestic maritime industry. If you work in a U.S. shipyard or serve as a crew member on a domestic dredging vessel, this change introduces direct competition from international players who don't have the same overhead costs associated with American shipbuilding. For a welder at a domestic shipyard, this could mean fewer orders for specialized dredging vessels. For the merchant mariner, it means the ship doing the work in a U.S. harbor might now be staffed by an international crew under a foreign flag, potentially shifting jobs away from the domestic labor market.

Regulatory Ripple Effects

Beyond the ships themselves, the removal of 'dredged material' from specific transportation requirements creates a new landscape for how we move what we dig up. Currently, moving that material is strictly regulated to ensure it’s handled by domestic carriers. By deleting these references, the bill streamlines the logistics of getting dirt and silt out of the way, but it also reduces the specific oversight that previously governed its transport. For a small business owner operating tugs or barges that move this material, the bill represents a transition from a protected local market to a wide-open global one where the rules of the game have been significantly simplified.