When water stands between you and completing the job, a well-designed cofferdam makes all the difference. At J.F. Brennan, we bring decades of experience installing all types and sizes of temporary structures that enable safe, dry work in submerged environments.
Cofferdam Installation
Our team has the expertise to fabricate, install, and maintain a wide range of cofferdam systems, ensuring each structure is tailored to site conditions, minimizes risk, and provides a dry work area.
Dewatering & Water Management
J.F. Brennan provides complete dewatering and water management solutions to keep work areas safe and efficient. From bypass pumping and groundwater control to temporary diversions, we design and maintain systems tailored to site conditions. Our approach protects structures and ensures smooth, uninterrupted construction.
At Brennan, installing cofferdams is part of what we do best. Whether it’s a massive cellular cofferdam or a more modest box-type, we tailor every solution to your project’s size, site conditions, and safety requirements.
What We Offer
- Custom Design & Fabrication — Our in-house shop builds cofferdams engineered to optimize safety, efficiency, and durability.
- Site-Specific Risk Planning — We manage the many hazards inherent in cofferdams — currents, ice, vessel traffic, unstable soil, flood events, rock fissures, and confined spaces — with robust safety plans and emergency protocols.
- Dewatering & Seal Management — Strong seals, back-up dewatering systems, and well-thought-out water control are key to keeping the work area dry and the crews safe.
Types of Cofferdams
We have experience installing a broad range of temporary water-isolation structures, including:
- Box-type
- Braced
- Single and double-wall sheet pile
- Cellular
- Earthen
- Geotextile tube systems
- Portadam™ systems
Dewatering & Water Management
Brennan provides complete dewatering and water management solutions to keep work areas safe and efficient. From bypass pumping and groundwater control to temporary diversions, we design and maintain systems tailored to site conditions. Our approach protects structures and ensures smooth, uninterrupted construction.
