Stewart v. Dutra Construction Co.
The Court ruled that a massive dredge used to dig Boston's Ted Williams Tunnel counted as a "vessel" under federal maritime law, even though it mainly dug rather than transported cargo and was standing still when a worker was hurt.
The decision rejects a stricter test some lower courts used, holding instead that any watercraft practically capable of moving people or equipment over water qualifies as a vessel, which affects who can sue as an injured seaman under the Jones Act.
“Under § 3, a “vessel” is any watercraft practically capable of maritime transportation, regardless of its primary purpose or state of transit at a particular moment.”
The Court's core holding defining what counts as a vessel under maritime injury law.
How it got here: A federal trial court and the First Circuit ruled against the worker on both claims; the Supreme Court agreed to hear the case to resolve confusion over the vessel test.
The Case in Depth
What happened
A marine engineer was injured while working on a scow attached to the world's largest dredge, which was digging the trench beneath Boston Harbor for the Big Dig tunnel project. He sued the dredge's owner under maritime injury laws, but the company argued the dredge wasn't a "vessel" and he wasn't a "seaman," so he couldn't use those special legal protections.
The question before the Court
Was a giant floating dredge used to dig Boston's harbor tunnel a "vessel" under federal maritime injury law?
Why it matters
Workers hurt aboard dredges, barges, and other special-purpose floating equipment can more easily qualify as seamen entitled to sue their employers for negligence, rather than being limited to workers' compensation. Companies operating floating construction equipment face broader liability exposure, and courts nationwide now apply one consistent, more inclusive definition of "vessel."
What changes now
The case is sent back to the lower courts for further proceedings consistent with the Supreme Court's ruling that the dredge was a vessel. This is a final decision on the legal definition of 'vessel,' though the lower courts must still work out how it applies to the worker's specific negligence and seaman-status claims on remand.
What this does not decide
The Court decided only that the dredge counted as a "vessel." It did not decide whether the injured worker actually qualifies as a "seaman" entitled to sue under the Jones Act, or whether the company was actually negligent — those questions return to the lower courts.
How the Court got there
The legal reasoning, step by step
- The Court looked to a longstanding federal definition, dating to 1873 statutes, that says a 'vessel' includes any watercraft or artificial contrivance used, or capable of being used, as a means of transportation on water — and found this definition still controls under the harbor workers' law.
- Historical and later Supreme Court cases had consistently treated dredges as vessels under this definition, even though dredges are built mainly for digging rather than for carrying passengers or freight, because they still moved people and equipment across water while working.
- The Court rejected the lower court's test that asked whether a craft's primary purpose was navigation or commerce, holding that the statutory language requires only that the craft be capable of being used for water transport, not that transport be its main job.
- The Court also rejected treating a craft's vessel status as depending on whether it happened to be moving at the exact moment of an accident, since that kind of moment-by-moment 'snapshot' approach had already been rejected in a prior seaman-status case; a craft only loses vessel status if it has been permanently taken out of service or rendered practically incapable of moving.
- Applying these principles, the Court found the dredge here was only temporarily idle for repairs, not permanently withdrawn from use, so it remained practically capable of maritime transport and qualified as a vessel.
Doctrinal impact
Cases affected by this decision
Abrogates DiGiovanni v. Traylor Brothers, Inc. (959 F. 2d 1119)
Rejects the appeals court's test requiring a craft's primary purpose to be navigation or that it be moving during an accident.
Distinguishes Cope v. Vallette Dry Dock Co. (119 U. S. 625)
Explains that permanently moored drydocks aren't vessels, unlike temporarily idle craft like the dredge here.
Distinguishes Evansville & Bowling Green Packet Co. v. Chero Cola Bottling Co. (271 U. S. 19)
Wharfboat permanently attached to shore wasn't a vessel, unlike the temporarily stationary dredge.