J.F. Brennan Company

J.F. Brennan Company Brennan is a family-owned marine construction and environmental remediation firm operating throughout North America since 1919. Why Brennan?

Working closely with public and private owners of water-based infrastructure since 1919, we operate throughout coastal and inland waterways nationwide, maintaining a large fleet of marine and amphibious equipment

Everything we do takes place around the water. As a result, we have the right people, specialized equipment, and proper programs in place to mitigate associated risks. Over the past 100

years, our high-quality work and transparent communication with clients have made us a preferred contractor for the US EPA, US Army Corps of Engineers, and private infrastructure owners across the country. Safety, quality, and environmental stewardship are long-standing principles within our organization. For the benefit of our employees, clients, and communities, we operate our business to comply with international standards and regulatory requirements. Appropriately, we are certified to ISO 9001: 2015 Quality Management System, ISO 14001: 2015 Environmental Management System, and ISO 45001: 2018 Occupational Health and Safety Management System. Please note:
All J.F. Brennan Company works are protected by copyright.

๐“๐ก๐š๐ง๐ค ๐ฒ๐จ๐ฎ ๐ญ๐จ ๐จ๐ฎ๐ซ ๐๐ซ๐ž๐ง๐ง๐š๐ง ๐Ÿ๐š๐ฆ๐ข๐ฅ๐ฒ! Behind every great achievement, innovation, and company, is an incredible team that wor...
09/04/2026

๐“๐ก๐š๐ง๐ค ๐ฒ๐จ๐ฎ ๐ญ๐จ ๐จ๐ฎ๐ซ ๐๐ซ๐ž๐ง๐ง๐š๐ง ๐Ÿ๐š๐ฆ๐ข๐ฅ๐ฒ! Behind every great achievement, innovation, and company, is an incredible team that works tirelessly to make it happen. Thank you for your passion and dedication every single day. Happy Labor Day weekend! ๐Ÿ’ช

๐€๐ง๐จ๐ญ๐ก๐ž๐ซ ๐ ๐ซ๐ž๐š๐ญ ๐ƒ๐š๐ฆ ๐’๐š๐Ÿ๐ž๐ญ๐ฒ ๐‚๐จ๐ง๐Ÿ๐ž๐ซ๐ž๐ง๐œ๐ž ๐ข๐ง ๐ญ๐ก๐ž ๐›๐จ๐จ๐ค๐ฌ! ๐Ÿ‘Craig Bartheld, Matthew Chan, and Ashley Gossett represented Brennan ...
09/03/2026

๐€๐ง๐จ๐ญ๐ก๐ž๐ซ ๐ ๐ซ๐ž๐š๐ญ ๐ƒ๐š๐ฆ ๐’๐š๐Ÿ๐ž๐ญ๐ฒ ๐‚๐จ๐ง๐Ÿ๐ž๐ซ๐ž๐ง๐œ๐ž ๐ข๐ง ๐ญ๐ก๐ž ๐›๐จ๐จ๐ค๐ฌ! ๐Ÿ‘

Craig Bartheld, Matthew Chan, and Ashley Gossett represented Brennan at Dam Safety 2026 in Raleigh, connecting with industry partners and discussing the challenges, solutions, and opportunities shaping the future of dam infrastructure.

From complex rehabilitation projects to specialized marine construction, Brennan brings a wide range of capabilities to dam projects across the country.

Thank you to everyone who stopped by Booth 600 to connect with our team. ๐–๐ž ๐ž๐ง๐ฃ๐จ๐ฒ๐ž๐ ๐ญ๐ก๐ž ๐œ๐จ๐ง๐ฏ๐ž๐ซ๐ฌ๐š๐ญ๐ข๐จ๐ง๐ฌ ๐š๐ง๐ ๐ฅ๐จ๐จ๐ค ๐Ÿ๐จ๐ซ๐ฐ๐š๐ซ๐ ๐ญ๐จ ๐œ๐จ๐ง๐ญ๐ข๐ง๐ฎ๐ข๐ง๐  ๐ญ๐ก๐ž๐ฆ!

๐๐ข๐  ๐ฐ๐จ๐ซ๐ค ๐ข๐ฌ ๐ฎ๐ง๐๐ž๐ซ๐ฐ๐š๐ฒ ๐š๐ญ ๐‘๐จ๐œ๐ค ๐ˆ๐ฌ๐ฅ๐š๐ง๐ ๐ƒ๐š๐ฆ ๐จ๐ง ๐ญ๐ก๐ž ๐‚๐จ๐ฅ๐ฎ๐ฆ๐›๐ข๐š ๐‘๐ข๐ฏ๐ž๐ซ ๐ข๐ง ๐–๐š๐ฌ๐ก๐ข๐ง๐ ๐ญ๐จ๐ง.๐Ÿ—Working in partnership with Kuney Construct...
09/02/2026

๐๐ข๐  ๐ฐ๐จ๐ซ๐ค ๐ข๐ฌ ๐ฎ๐ง๐๐ž๐ซ๐ฐ๐š๐ฒ ๐š๐ญ ๐‘๐จ๐œ๐ค ๐ˆ๐ฌ๐ฅ๐š๐ง๐ ๐ƒ๐š๐ฆ ๐จ๐ง ๐ญ๐ก๐ž ๐‚๐จ๐ฅ๐ฎ๐ฆ๐›๐ข๐š ๐‘๐ข๐ฏ๐ž๐ซ ๐ข๐ง ๐–๐š๐ฌ๐ก๐ข๐ง๐ ๐ญ๐จ๐ง.๐Ÿ—

Working in partnership with Kuney Construction, Brennan is strengthening and modernizing critical infrastructure at Chelan County Public Utility Districtโ€™s ๐ง๐ž๐š๐ซ๐ฅ๐ฒ ๐œ๐ž๐ง๐ญ๐ฎ๐ซ๐ฒ-๐จ๐ฅ๐ ๐ก๐ฒ๐๐ซ๐จ๐ž๐ฅ๐ž๐œ๐ญ๐ซ๐ข๐œ ๐Ÿ๐š๐œ๐ข๐ฅ๐ข๐ญ๐ฒ. From specialized underwater construction to major spillway improvements, our crews are proud to play a role in extending the life of Rock Island Dam for generations to come.

๐Ÿ”—๐‘๐ž๐š๐ ๐ฆ๐จ๐ซ๐ž ๐š๐›๐จ๐ฎ๐ญ ๐ญ๐ก๐ž ๐ฐ๐จ๐ซ๐ค ๐ฎ๐ง๐๐ž๐ซ๐ฐ๐š๐ฒ ๐š๐ญ ๐‘๐จ๐œ๐ค ๐ˆ๐ฌ๐ฅ๐š๐ง๐ ๐ƒ๐š๐ฆ ๐š๐ญ ๐ญ๐ก๐ž ๐ฅ๐ข๐ง๐ค ๐›๐ž๐ฅ๐จ๐ฐ.

https://www.ncwbusiness.com/stories/major-modernization-work-underway-at-rock-island-dam,185853

ROCK ISLAND โ€” A 180-foot crane floating on a barge near Rock Island Dam is the most visible sign of a series of major modernization projects underway at the nearly century-old hydroelectric โ€ฆ

โš“๏ธ๐‚๐ก๐ž๐ž๐ซ๐ฌ! ๐‡๐ž๐ซ๐žโ€™๐ฌ ๐ญ๐จ ๐ญ๐ก๐ž ๐๐ข๐œ๐ค ๐“.!This past weekend, employees, family, and friends gathered in Rhode Island for a the ded...
09/01/2026

โš“๏ธ๐‚๐ก๐ž๐ž๐ซ๐ฌ! ๐‡๐ž๐ซ๐žโ€™๐ฌ ๐ญ๐จ ๐ญ๐ก๐ž ๐๐ข๐œ๐ค ๐“.!

This past weekend, employees, family, and friends gathered in Rhode Island for a the dedication of the Nick T., a new tug named in honor of Nick Tanionos and his many contributions to the industry.

Nick founded Specialty Diving Services (SDS) in 1986 and spent decades building a company known throughout New England for marine construction and commercial diving. When we acquired SDS in 2020, Nick joined the Brennan team and continued to be an important part of our East Coast operations, bringing strong relationships and a deep commitment to the marine industry.

Weโ€™re grateful to everyone who came together to celebrate Nick and his contributions!

Special thanks to those who spent their time and energy getting this good looking tug up to Brennan standards, as we welcome it to the Brennan fleet. May the Nick T. bring pride to our team for many years to come. ๐Ÿ’™

๐†๐ข๐ฏ๐ข๐ง๐  ๐›๐š๐œ๐ค ๐ข๐ฌ ๐ฉ๐š๐ซ๐ญ ๐จ๐Ÿ ๐ฐ๐ก๐จ ๐ฐ๐ž ๐š๐ซ๐ž ๐š๐ญ ๐๐ซ๐ž๐ง๐ง๐š๐ง. ๐Ÿ’™As part of our Brennan Give Back initiative, we were proud to sponsor the...
08/28/2026

๐†๐ข๐ฏ๐ข๐ง๐  ๐›๐š๐œ๐ค ๐ข๐ฌ ๐ฉ๐š๐ซ๐ญ ๐จ๐Ÿ ๐ฐ๐ก๐จ ๐ฐ๐ž ๐š๐ซ๐ž ๐š๐ญ ๐๐ซ๐ž๐ง๐ง๐š๐ง. ๐Ÿ’™

As part of our Brennan Give Back initiative, we were proud to sponsor the inaugural ๐‹๐š ๐‚๐ซ๐จ๐ฌ๐ฌ๐ž ๐Š๐ข๐๐ฌ ๐‚๐ฎ๐ฉ ๐›๐ž๐ง๐ž๐Ÿ๐ข๐ญ๐ข๐ง๐  ๐‚๐ก๐ข๐ฅ๐๐ซ๐ž๐งโ€™๐ฌ ๐Œ๐ข๐ซ๐š๐œ๐ฅ๐ž ๐๐ž๐ญ๐ฐ๐จ๐ซ๐ค. Together, the event raised over $80,000 to support local children and families!

It was especially meaningful to meet some of the families who benefit from these programs, hear their stories, and see firsthand what this support means to them.

Weโ€™re grateful to be part of an event that brings our community together for such an important cause.

๐“๐ซ๐ฎ๐ฌ๐ญ ๐ข๐ฌ ๐ž๐š๐ซ๐ง๐ž๐ ๐จ๐ง๐ž ๐ฉ๐ซ๐จ๐ฃ๐ž๐œ๐ญ ๐š๐ญ ๐š ๐ญ๐ข๐ฆ๐ž. ๐Ÿค By 2010, Brennan was delivering larger, more complex environmental remediation ...
08/27/2026

๐“๐ซ๐ฎ๐ฌ๐ญ ๐ข๐ฌ ๐ž๐š๐ซ๐ง๐ž๐ ๐จ๐ง๐ž ๐ฉ๐ซ๐จ๐ฃ๐ž๐œ๐ญ ๐š๐ญ ๐š ๐ญ๐ข๐ฆ๐ž. ๐Ÿค

By 2010, Brennan was delivering larger, more complex environmental remediation projects.

On the Ottawa River Sediment Remediation Project in Toledo, Ohio, Brennan dredged and dewatered more than 240,000 cubic yards of sediment impacted by PCBs, lead, and PAHs while treating approximately 510 million gallons of remediation water generated during the work.

Together, Brennan's integrated approach supported the restoration of the Ottawa River, addressed several beneficial use impairments in the Maumee Area of Concern, and helped protect the future of the Great Lakes. After all, environmental remediation is about more than today's project. It's about protecting tomorrow's waterways.

The cleanup operated 24 hours a day, six days a week. Dredging, dewatering, and environmental water treatment crews worked together at every stage to keep the cleanup moving safely and efficiently. Clean water was discharged under an NPDES permit issued for the project, and the team accomplished a perfect record of compliance with discharge permit limits.

When the work was complete, post-remediation sampling confirmed PCBs concentrations were 37% lower than the project's cleanup goals.

๐Ÿ’ง ๐“๐ก๐ž ๐ซ๐จ๐š๐ ๐ญ๐จ ๐Ÿ“ ๐›๐ข๐ฅ๐ฅ๐ข๐จ๐ง ๐ ๐š๐ฅ๐ฅ๐จ๐ง๐ฌ of water treated ๐ฐ๐š๐ฌ ๐›๐ฎ๐ข๐ฅ๐ญ ๐ญ๐ก๐ž ๐ฌ๐š๐ฆ๐ž ๐ฐ๐š๐ฒ ๐ญ๐ซ๐ฎ๐ฌ๐ญ ๐ข๐ฌ ๐ž๐š๐ซ๐ง๐ž๐: ๐จ๐ง๐ž ๐ฉ๐ซ๐จ๐ฃ๐ž๐œ๐ญ ๐š๐ญ ๐š ๐ญ๐ข๐ฆ๐ž.

๐’๐ญ๐š๐ฒ ๐ญ๐ฎ๐ง๐ž๐ as we continue looking back at the key projects that helped make this milestone possible.

๐Ÿ“ ๐๐ž๐ฑ๐ญ ๐ฌ๐ญ๐จ๐ฉ: ๐ญ๐ก๐ž ๐Ÿ๐ŸŽ๐Ÿ๐Ÿ” ๐€๐’๐ƒ๐’๐Ž ๐ƒ๐š๐ฆ ๐’๐š๐Ÿ๐ž๐ญ๐ฒ ๐‚๐จ๐ง๐Ÿ๐ž๐ซ๐ž๐ง๐œ๐žWe're looking forward to connecting with engineers, dam owners, regula...
08/26/2026

๐Ÿ“ ๐๐ž๐ฑ๐ญ ๐ฌ๐ญ๐จ๐ฉ: ๐ญ๐ก๐ž ๐Ÿ๐ŸŽ๐Ÿ๐Ÿ” ๐€๐’๐ƒ๐’๐Ž ๐ƒ๐š๐ฆ ๐’๐š๐Ÿ๐ž๐ญ๐ฒ ๐‚๐จ๐ง๐Ÿ๐ž๐ซ๐ž๐ง๐œ๐ž

We're looking forward to connecting with engineers, dam owners, regulators, and industry professionals advancing dam safety across the country. ASDSO is always a great opportunity to exchange ideas, discuss complex challenges, and strengthen the relationships that move our industry forward.

๐ˆ๐Ÿ ๐ฒ๐จ๐ฎ'๐ฅ๐ฅ ๐›๐ž ๐š๐ญ๐ญ๐ž๐ง๐๐ข๐ง๐ , ๐ฌ๐ญ๐จ๐ฉ ๐›๐ฒ ๐๐จ๐จ๐ญ๐ก #๐Ÿ”๐ŸŽ๐ŸŽ ๐š๐ง๐ ๐œ๐จ๐ง๐ง๐ž๐œ๐ญ ๐ฐ๐ข๐ญ๐ก ๐ญ๐ก๐ž ๐๐ซ๐ž๐ง๐ง๐š๐ง ๐ญ๐ž๐š๐ฆ. We'd love to talk about your next project.

See you Raleigh!๐Ÿ‘‹

๐ƒ๐ž๐œ๐š๐๐ž๐ฌ ๐จ๐Ÿ ๐ฉ๐จ๐ฅ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง carried by runoff have left behind layers of organic, decaying muck in Floridaโ€™s Banana River Lagoo...
08/26/2026

๐ƒ๐ž๐œ๐š๐๐ž๐ฌ ๐จ๐Ÿ ๐ฉ๐จ๐ฅ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง carried by runoff have left behind layers of organic, decaying muck in Floridaโ€™s Banana River Lagoon. ๐๐ซ๐ž๐ง๐ง๐š๐ง ๐ข๐ฌ ๐ฐ๐จ๐ซ๐ค๐ข๐ง๐  ๐ญ๐จ ๐ซ๐ž๐ฌ๐ญ๐จ๐ซ๐ž ๐ญ๐ก๐ข๐ฌ ๐ฏ๐ข๐ญ๐š๐ฅ ๐ฐ๐š๐ญ๐ž๐ซ๐ฐ๐š๐ฒ Through sand capping, weโ€™re helping improve habitat conditions and create an environment where seagrass, fish, and wildlife can recover and thrive.

A project offshore at the Cocoa Beach recreation complex is sand capping muck deposits in the Banana River.

๐๐ซ๐ž๐ง๐ง๐š๐ง ๐ข๐ฌ ๐จ๐Ÿ๐Ÿ๐ข๐œ๐ข๐š๐ฅ๐ฅ๐ฒ ๐ข๐ง ๐’๐ญ. ๐‹๐จ๐ฎ๐ข๐ฌ!For the past seven years, Brennan and Budrovichโ€™s Marine Operations team have worked ...
08/25/2026

๐๐ซ๐ž๐ง๐ง๐š๐ง ๐ข๐ฌ ๐จ๐Ÿ๐Ÿ๐ข๐œ๐ข๐š๐ฅ๐ฅ๐ฒ ๐ข๐ง ๐’๐ญ. ๐‹๐จ๐ฎ๐ข๐ฌ!

For the past seven years, Brennan and Budrovichโ€™s Marine Operations team have worked side by side on projects throughout the region. That partnership has built strong relationships, a shared understanding of local facilities, and a foundation for what comes next.

Now, weโ€™re taking the next step.

๐๐ซ๐ž๐ง๐ง๐š๐ง ๐ก๐š๐ฌ ๐š๐œ๐ช๐ฎ๐ข๐ซ๐ž๐ ๐ญ๐ก๐ž ๐ฆ๐š๐ซ๐ข๐ง๐ž ๐จ๐ฉ๐ž๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ ๐จ๐Ÿ ๐๐ฎ๐๐ซ๐จ๐ฏ๐ข๐œ๐ก ๐‚๐จ๐ง๐ญ๐ซ๐š๐œ๐ญ๐ข๐ง๐  ๐‚๐จ., establishing a permanent presence in St. Louis. As part of the transition, Regional Operations Manager Mindy Brundick and her team have joined Brennan and will continue leading operations in the region.

With Brennanโ€™s expanded team, equipment, and capabilities, ๐ฐ๐žโ€™๐ซ๐ž ๐›๐ซ๐ข๐ง๐ ๐ข๐ง๐  ๐ฆ๐จ๐ซ๐ž ๐ญ๐ก๐š๐ง ๐š ๐œ๐ž๐ง๐ญ๐ฎ๐ซ๐ฒ ๐จ๐Ÿ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ข๐ž๐ง๐œ๐ž ๐ญ๐จ ๐ฌ๐ฎ๐ฉ๐ฉ๐จ๐ซ๐ญ ๐ฐ๐š๐ญ๐ž๐ซ๐Ÿ๐ซ๐จ๐ง๐ญ ๐š๐ง๐ ๐ข๐ง๐๐ฎ๐ฌ๐ญ๐ซ๐ข๐š๐ฅ ๐Ÿ๐š๐œ๐ข๐ฅ๐ข๐ญ๐ข๐ž๐ฌ ๐š๐œ๐ซ๐จ๐ฌ๐ฌ ๐’๐ญ. ๐‹๐จ๐ฎ๐ข๐ฌ ๐š๐ง๐ ๐›๐ž๐ฒ๐จ๐ง๐.

Weโ€™re excited to build on the relationships weโ€™ve established, create new ones throughout the region, and become a ๐ฉ๐ž๐ซ๐ฆ๐š๐ง๐ž๐ง๐ญ ๐ฉ๐š๐ซ๐ญ ๐จ๐Ÿ ๐ญ๐ก๐ž ๐’๐ญ. ๐‹๐จ๐ฎ๐ข๐ฌ ๐œ๐จ๐ฆ๐ฆ๐ฎ๐ง๐ข๐ญ๐ฒ.

https://www.marinelink.com/news/brennan-acquires-budrovichs-marine-ops-542201

Happy National Hydropower Day!โšก๐Ÿ’ง๐ƒ๐ข๐ ๐ฒ๐จ๐ฎ ๐ค๐ง๐จ๐ฐ? ๐‹๐š๐ฌ๐ญ ๐ฒ๐ž๐š๐ซ, ๐ก๐ฒ๐๐ซ๐จ๐ฉ๐จ๐ฐ๐ž๐ซ ๐š๐œ๐œ๐จ๐ฎ๐ง๐ญ๐ž๐ ๐Ÿ๐จ๐ซ ๐ง๐ž๐š๐ซ๐ฅ๐ฒ ๐จ๐ง๐ž-๐ช๐ฎ๐š๐ซ๐ญ๐ž๐ซ ๐จ๐Ÿ ๐ญ๐ก๐ž ๐ž๐ฅ๐ž๐œ๐ญ๐ซ๐ข๐œ๐ข๐ญ๐ฒ ...
08/24/2026

Happy National Hydropower Day!โšก๐Ÿ’ง

๐ƒ๐ข๐ ๐ฒ๐จ๐ฎ ๐ค๐ง๐จ๐ฐ? ๐‹๐š๐ฌ๐ญ ๐ฒ๐ž๐š๐ซ, ๐ก๐ฒ๐๐ซ๐จ๐ฉ๐จ๐ฐ๐ž๐ซ ๐š๐œ๐œ๐จ๐ฎ๐ง๐ญ๐ž๐ ๐Ÿ๐จ๐ซ ๐ง๐ž๐š๐ซ๐ฅ๐ฒ ๐จ๐ง๐ž-๐ช๐ฎ๐š๐ซ๐ญ๐ž๐ซ ๐จ๐Ÿ ๐ญ๐ก๐ž ๐ž๐ฅ๐ž๐œ๐ญ๐ซ๐ข๐œ๐ข๐ญ๐ฒ ๐ ๐ž๐ง๐ž๐ซ๐š๐ญ๐ž๐ ๐Ÿ๐ซ๐จ๐ฆ ๐ซ๐ž๐ง๐ž๐ฐ๐š๐›๐ฅ๐ž ๐ฌ๐จ๐ฎ๐ซ๐œ๐ž๐ฌ ๐ข๐ง ๐ญ๐ก๐ž ๐”.๐’.!

Behind that electricity are dams, waterways, and the infrastructure that makes hydropower possible. Maintaining and improving this infrastructure takes specialized knowledge, years of experience, and the ability to safely navigate challenging environments, and Brennan has spent more than a century working on and around water, building that knowledge and experience along the way.

As the energy landscape continues to evolve, ๐ฐ๐žโ€™๐ซ๐ž ๐ฉ๐ซ๐จ๐ฎ๐ ๐ญ๐จ ๐ฉ๐ฎ๐ญ ๐จ๐ฎ๐ซ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ข๐ž๐ง๐œ๐ž ๐ญ๐จ ๐ฐ๐จ๐ซ๐ค ๐ก๐ž๐ฅ๐ฉ๐ข๐ง๐  ๐ฌ๐ก๐š๐ฉ๐ž ๐ญ๐ก๐ž ๐Ÿ๐ฎ๐ญ๐ฎ๐ซ๐ž ๐จ๐Ÿ ๐ž๐ง๐ž๐ซ๐ ๐ฒ.

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818 Bainbridge Street
La Crosse, WI
54603

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