Your Trusted Partner Along the Inland Waterways

For more than 100 years, J.F. Brennan Company (Brennan) has delivered safe, innovative marine construction solutions across the Upper Mississippi River system and inland waterways. As a fourth-generation, family-owned company founded in 1919, we partner with public and private owners of water-based infrastructure to solve complex challenges above, along, and below the waterline.

Why Marine Highway 35 Matters
As a sponsor of the Marine Highway 35 Workshop, Brennan is proud to support conversations that strengthen the future of the Upper Mississippi River system. The M-35 corridor represents a critical opportunity to improve freight mobility, reduce pressure on overland transportation networks, and drive long-term investment in the infrastructure that keeps our region connected and competitive. For Brennan and our partners along the inland waterways, this workshop creates valuable opportunities to collaborate, share practical solutions, and help shape a more resilient, efficient, and sustainable future for the working river.

Built for Working Waterways
We understand the demands of inland waterway operations and the importance of minimizing disruption. Our clients count on us for transparent communication, disciplined project planning, and reliable execution in safety-critical environments. Whether supporting terminal improvements, emergency repairs, environmental dredging, or long-term infrastructure rehabilitation, Brennan delivers practical solutions that keep projects moving.

Core Capabilities
• Barge terminals and industrial docks
• Harbor services
• Commercial diving and underwater inspections
• Environmental dredging, capping, and restoration
• Dam construction and rehabilitation
• Energy and industrial services
• Public waterfronts and marinas

Why Partners Choose Brennan
What sets Brennan apart is our people. Our union craft professionals, engineers, project managers, and marine crews are committed to delivering quality work with honesty, accountability, and respect for the waterways and communities we serve.

Built by people and driven by trust, Brennan continues to strengthen the inland marine transportation network through safe execution, open communication, and technically sound solutions that support the future of America’s working waterways.