Marine Cofferdam
A temporary floating enclosure used to create dry work areas underwater for construction like bridge piers. HTS 8907.90.00.90 covers it as other floating structures, specifically cofferdams.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fixed steel dams for rivers
Non-floating cofferdams are steel bridge equipment.
If primarily pumping equipment
If pumps dominate, classifies as self-propelled machinery.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Submit engineering plans proving watertight floating enclosure design
• USACE permits often needed; prepare environmental impact docs early
Related Products under HTS 8907.90.00.90
Aquaculture Fish Pen
Floating net enclosure for fish farming in open water, supported by buoyant rings. Classified as other floating structures (rafts) under 8907.90.00.90.
Floating Solar Panel Array
Buoyant platform mounting solar panels for water-based renewable energy generation. 8907.90.00.90 as other floating structures.
Beacon Tower Float
Floating base for elevated navigation beacons in shallow waters. Included in HTS 8907.90.00.90 as beacons and other floating structures.
Emergency Response Float
Rapid-deploy floating platform for disaster relief operations on floodwaters. 8907.90.00.90 as other floating structures (rafts).
Floating Fuel Barge
Non-propelled buoyant barge for temporary fuel storage and transfer at sea. Classed under 8907.90.00.90.
Scientific Research Float
Floating platform with sensors for oceanographic data collection. 8907.90.00.90 floating structures.