J.F. Brennan Company is a family-owned, marine construction firm specializing in providing quality dam construction, repairs, commercial dive, and inspection services throughout the inland waterways of the United States. At Brennan, we work on all parts of dams, both above and below the waterline. Over the past 100 years, our quality work has made us a preferred contractor of the U.S. EPA, U.S. Army Corps of Engineers, and private owners across the country. Connect with us to learn more!