Largest Mechanical Dredger in the Western Hemisphere Keeps Houston Ship Channel Open for Global Trade

By Fabio Lucas Carvalho

Shown by the BuildWitt channel in a video published on May 23, 2026, the DB Catalina uses a bucket with a capacity greater than 76 cubic meters, engines of up to 4,000 horsepower, and a crew in continuous shifts to remove about eight million cubic yards of sediment from the Houston Ship Channel.

Beneath the seemingly calm waters of the Houston Ship Channel in the United States, a threat continuously accumulates. It is not a problem easily perceived by those observing the port from the shore, but a massive amount of mud and other sediments that deposit at the bottom of the waterway.

Without the removal of this material, the available depth for ships gradually decreases, hindering the passage of large freighters, tankers, and container ships. To prevent one of the main commercial routes in the United States from losing capacity, a gigantic structure works almost non-stop.

This is the DB Catalina, a hybrid mechanical dredger owned by the American company Curtin Maritime. The vessel’s operation in the channel was presented by BuildWitt in a video published on YouTube on May 23, 2026.

Built in 2025, the DB Catalina is classified by its owner as the largest hybrid clamshell dredger — a bucket system with two articulated shells — in the Western Hemisphere. Its largest bucket can remove almost 80 cubic meters of material in a single cycle.

Channel moves more than 300 million tons

The Houston Ship Channel stretches approximately 52 miles, or about 84 kilometers, linking the port region of Houston to the Gulf of Mexico.

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