---
title: Between the Trees Blog | Dredging
description: Dredging | Our official blog including Brennan company news, videos, and project overviews from the field.
image: https://www.jfbrennan.com/hubfs/home_page/Between-the-trees-blog.jpg
---
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[ ](https://www.jfbrennan.com/blog/powdered-activated-carbon-capping-largest-remediation-project)
## [PAC Delivery for the Largest Remediation Project of Its Kind](https://www.jfbrennan.com/blog/powdered-activated-carbon-capping-largest-remediation-project)
Posted by [Casey Evenson](https://www.jfbrennan.com/blog/author/casey-evenson) on February 05, 2026
## **Addressing Dioxin and Furan Contamination **
Under the Great Lakes Legacy Act, and in partnership with the Minnesota Pollution Control Agency (MPCA) and an industry partner, the US Environmental Protection Agency’s (EPA) Great Lakes National Program Office requested construction services to address dioxin and furan contamination within Thomson Reservoir. The project, located in Carlton, Minnesota, was awarded to Brennan in the spring of 2024.
Our contract included placing a thin layer of amendment containing 10% powdered activated carbon (PAC) across the reservoir to address approximately 225,000 cubic yards of contaminated sediment. This remedy represents the largest remediation project of its kind implemented in the United States to date and is designed to reduce the bioavailability of toxins in surface sediments to macroinvertebrates, an essential food source for fish.
[Read More](https://www.jfbrennan.com/blog/powdered-activated-carbon-capping-largest-remediation-project)
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[ ](https://www.jfbrennan.com/blog/what-are-pfas)
## [What Are PFAS and Why Do You Need To Know?](https://www.jfbrennan.com/blog/what-are-pfas)
Posted by [Connor McNeely, Chemist](https://www.jfbrennan.com/blog/author/connor-mcneely-chemist) on November 12, 2025
PFAS, often called “forever chemicals,” are at the center of one of today’s most complex environmental challenges. Used for decades in everything from manufacturing processes to firefighting foam applications, these persistent compounds are now found in soil, sediment, and waterways across the country. As research and regulations evolve, organizations are seeking trusted partners who can safely and effectively address contamination.
We'll explain PFAS, associated risks, and how Brennan is prepared with the expertise, technology, and experience needed to protect our shared environment.
[Read More](https://www.jfbrennan.com/blog/what-are-pfas)
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[ ](https://www.jfbrennan.com/blog/dredging-awards-2025)
## [Brennan Honored with Three Awards at 2025 WEDA World Dredging Conference](https://www.jfbrennan.com/blog/dredging-awards-2025)
Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on July 17, 2025
We’re proud to share that J.F. Brennan Company received three awards at the [2025 World Dredging Conference & Expo](https://wodcon.org/), hosted by the Western Dredging Association ([WEDA](https://www.westerndredging.org/)) in San Diego, California. These honors underscore our longstanding commitment to safety, environmental responsibility, and meaningful partnerships within the dredging and marine construction industry.
Brennan was recognized with the **Safety Excellence Award for a Dredging Project** for our sustained, high-performance safety culture on the Grasse River Remediation Project. Two of our collaborative projects were also honored with **Environmental Excellence Awards** in the remediation category—one for our work on the **Torch Lake Drum Removal Pilot Study****,** alongside [Anchor QEA](https://www.anchorqea.com/), [EA Engineering](https://eaest.com/), and [Honeywell International](https://www.honeywell.com/us/en) —and the other for the **Milwaukee River OU2 Remediation Project,** in partnership with [GEI Consultants](https://www.geiconsultants.com/) and [We Energies](https://www.we-energies.com/).
[Read More](https://www.jfbrennan.com/blog/dredging-awards-2025)
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[.jpeg) ](https://www.jfbrennan.com/blog/model-for-environmental-dredging-capping-water-treatment)
## [A Proven Model for Environmental Dredging, Capping, Water Treatment](https://www.jfbrennan.com/blog/model-for-environmental-dredging-capping-water-treatment)
Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on June 05, 2025
## Coordination, Innovation, and Respect for the Environment
At the heart of Duluth, Minnesota—near Lake Superior—Brennan led a large-scale environmental remediation project at Munger Landing, removing historical contamination from over 34 acres of the St. Louis River. This multi-year effort addressed legacy pollutants including PCBs, mercury, dioxins, and furans through precision hydraulic dredging, sediment dewatering, water treatment, and the strategic placement of clean sand and habitat materials.
"The scale and scope of this project demanded constant coordination, innovation, and respect for the environment," says Project Manager Casey Evenson
[Read More](https://www.jfbrennan.com/blog/model-for-environmental-dredging-capping-water-treatment)
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[ ](https://www.jfbrennan.com/blog/refinery-wastewater-cleanup)
## [How Brennan Delivered Safe, Efficient Refinery Wastewater Cleanup on Schedule](https://www.jfbrennan.com/blog/refinery-wastewater-cleanup)
Posted by [Amber Wilson](https://www.jfbrennan.com/blog/author/amber-wilson) on January 30, 2025
## **Refinery Wastewater Pond Cleanup with Remote Dredging**
We recently completed the cleanup of two wastewater ponds for a large producer of transportation fuels. Using a remotely controlled dredge, Brennan removed wastewater sludge from impoundments on the refinery site and dewatered the material with six 2-meter belt filter presses. The remotely controlled dredge added a layer of safety to the project, preventing any health risks that a Leverman might face if exposed to hydrogen sulfide gas released during the dredging process.
[Read More](https://www.jfbrennan.com/blog/refinery-wastewater-cleanup)
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[ ](https://www.jfbrennan.com/blog/third-ward-milwaukee-river-cleanup)
## [Milwaukee River Cleanup: Successful Results in Environmental Remediation](https://www.jfbrennan.com/blog/third-ward-milwaukee-river-cleanup)
Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on October 07, 2024
The Third Ward Milwaukee River remediation project is a pivotal step in cleaning up the Milwaukee River. It targets the site of a decommissioned manufactured gas plant that once operated in the area.
## A Collaborative Effort to Clean Milwaukee's River
Brennan was selected as the prime contractor for this ambitious project, tasked with dredging contaminated sediments and treating water to restore the river's health. Working closely with GEI Consultants, Inc. (GEI), the project’s design engineers, Brennan is delivering comprehensive solutions that combine environmental restoration, water treatment, and marine construction expertise.
[Read More](https://www.jfbrennan.com/blog/third-ward-milwaukee-river-cleanup)
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[ ](https://www.jfbrennan.com/blog/remediation-restoration-video-lake-george)
## [How Brennan Brought Lake George Canal Back to Life! [with video]](https://www.jfbrennan.com/blog/remediation-restoration-video-lake-george)
Posted by [Sam Crawford, Project Manager](https://www.jfbrennan.com/blog/author/sam-crawford-project-manager) on July 29, 2024
Brennan embarked on a vital restoration project for the middle section of the Lake George Canal. The primary goal was to protect aquatic organisms by separating them from contaminated sediment through a multi-layer sediment cap.
## Initial Site Challenges
Hydrographic surveys revealed areas of varying slope and stability as the first layer of cap material was placed over the canal bottom. These issues were attributed to soft underlying sediment within the canal footprint. The success of this project hinged on effective collaboration between Brennan and the U.S. Army Corps of Engineers (USACE) to address these types of challenges.
[Read More](https://www.jfbrennan.com/blog/remediation-restoration-video-lake-george)
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[ ](https://www.jfbrennan.com/blog/safety-excellence-award-2024)
## [Brennan Awarded for Safety Excellence in Milwaukee River Remediation Project](https://www.jfbrennan.com/blog/safety-excellence-award-2024)
Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on June 26, 2024
**TAMPA, FL (June 26, 2024)** — The Western Dredging Association ([WEDA](https://www.westerndredging.org/)) has honored J.F. Brennan Company ([Brennan)](https://www.jfbrennan.com/) and [GEI Consultants](https://www.geiconsultants.com/press-release/weda-safety-excellence-award/) with a 2024 Safety Excellence Award for their work on the Third Ward Milwaukee River remediation project. GEI and Brennan accepted the award at WEDA’s Annual Dredging Summit and Expo in Tampa, Florida.
WEDA’s Safety Excellence Award recognizes individual organizations or project teams for exceptional safety performance and for exhibiting a proactive approach to raising safety awareness in the dredging workplace.
[Read More](https://www.jfbrennan.com/blog/safety-excellence-award-2024)
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[ ](https://www.jfbrennan.com/blog/dredge-pump-system-design)
## [Brennan Completes Innovative 10+ Mile Pump Using Dredge System Designed By Employees](https://www.jfbrennan.com/blog/dredge-pump-system-design)
Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on June 18, 2024
J.F. Brennan Company, Inc. ([Brennan](https://www.jfbrennan.com/)) overcame significant design challenges to complete a dredging project that involved hydraulically pumping slurry over a long distance of 10.4 miles. Brennan employees designed the dredging system and executed the entire project using Brennan-owned pipeline and equipment.
[Read More](https://www.jfbrennan.com/blog/dredge-pump-system-design)
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[ ](https://www.jfbrennan.com/blog/treatability-testing)
## [What Is Treatability: An Important Asset in Environmental Dredging](https://www.jfbrennan.com/blog/treatability-testing)
Posted by [Amber Wilson](https://www.jfbrennan.com/blog/author/amber-wilson) on February 29, 2024
Treatability testing uses bench-scale demonstrations and analysis to determine if a material can be effectively treated with a specific chemical or process. At Brennan, we use treatability testing to develop sound technical approaches for dredged material dewatering, in situ or dewatered dredged material stabilization, and water treatment.
[Treatability](https://www.jfbrennan.com/environmental/treatability) data can be used to price a job more accurately and find cost savings for our clients. Treatability testing allows us to select chemical and mechanical processes for treatment and evaluate less costly alternatives. Here's how we do it.
[Read More](https://www.jfbrennan.com/blog/treatability-testing)
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