--- title: Between the Trees Blog | Environmental Dredging (2) description: Environmental Dredging | Our official blog including Brennan company news, videos, and project overviews from the field. (2) image: https://www.jfbrennan.com/hubfs/home_page/Between-the-trees-blog.jpg --- [MENU **](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#mobile-nav) Submit - ** - [About Us](https://www.jfbrennan.com/about-us) - History - [Culture](https://www.jfbrennan.com/culture) - [Contact Us](https://www.jfbrennan.com/contact-us) - [Blog](https://www.jfbrennan.com/blog) - [Careers](https://www.jfbrennan.com/careers) - [Why Brennan?](https://www.jfbrennan.com/careers/why-brennan) - [Benefits](https://www.jfbrennan.com/careers/professional-and-technical) - [Current Openings](https://www.jfbrennan.com/careers/current-openings) - Online Application - [Brennan Gives Back](https://www.jfbrennan.com/givesback) - [Plan Room](http://www.brennanopr.com/) [![J.F. Brennan Company, Inc.](https://www.jfbrennan.com/hubfs/images/j-f-brennan-company-logo-horizontal.png) ![J.F. Brennan Company, Inc.](https://www.jfbrennan.com/hubfs/images/j-f-brennan-company-logo-horizontal.png) ](https://www.jfbrennan.com/) - [Environmental](https://www.jfbrennan.com/environmental) - [Dewatering Services](https://www.jfbrennan.com/environmental/separation-and-dewatering) - [Environmental Dredging](https://www.jfbrennan.com/environmental/environmental-dredging) - [Hydraulic Dredging](https://www.jfbrennan.com/environmental/hydraulic-dredging) - [Mechanical Dredging](https://www.jfbrennan.com/environmental/mechanical-dredging) - [Amphibious Dredging](https://www.jfbrennan.com/environmental/amphibious-dredging) - [Diver-Assisted Micro Dredging](https://www.jfbrennan.com/environmental/diver-assisted-micro-dredging) - [Material Transport](https://www.jfbrennan.com/environmental/material-transport) - [Hydrographic Survey](https://www.jfbrennan.com/environmental/hydrographic-survey) - [Habitat Restoration](https://www.jfbrennan.com/environmental/habitat-restoration) - [Isolation Barriers](https://www.jfbrennan.com/environmental/isolation-barriers) - [Mobile Water Treatment Trailer](https://www.jfbrennan.com/environmental/mobile-water-treatment-trailer) - [Sand Covers and Capping](https://www.jfbrennan.com/environmental/sand-covers-and-capping) - [Broadcast Capping System](https://www.jfbrennan.com/environmental/broadcast-capping-system) - [Mechanical Placement](https://www.jfbrennan.com/environmental/mechanical-placement) - [Armament](https://www.jfbrennan.com/environmental/armament) - [Treatability Testing](https://www.jfbrennan.com/environmental/treatability) - [Water Treatment ](https://www.jfbrennan.com/environmental/water-treatment) - [Wetland Remediation](https://www.jfbrennan.com/environmental/wetland-remediation) - [Marine Construction](https://www.jfbrennan.com/marine-construction) - [Submarine Cable Services](https://www.jfbrennan.com/submarine-cable) - [Dock Structures & Barge Terminals](https://www.jfbrennan.com/marine-constuction/dock-structures-and-barge-terminals) - [Deep Foundations](https://www.jfbrennan.com/marine-construction/deep-foundations) - [Dredging](https://www.jfbrennan.com/marine-construction/dredging) - [Underwater Inspections & Survey](https://www.jfbrennan.com/marine-construction/underwater-inspections-and-survey) - [Dive Inspections](https://www.jfbrennan.com/marine-construction/dive-inspections) - [Acoustic Imaging](https://www.jfbrennan.com/marine-construction/acoustic-imaging) - [Hydrographic Survey](https://www.jfbrennan.com/marine-construction/hydrographic-survey) - [Side Scan Sonar](https://www.jfbrennan.com/marine-construction/side-scan-sonar) - [ROV](https://www.jfbrennan.com/marine-construction/rov) - [Underwater Construction](https://www.jfbrennan.com/marine-construction/underwater-construction) - [Maritime Security Barrier Systems](https://www.jfbrennan.com/maritime-security-barriers) - [Bridge Construction](https://www.jfbrennan.com/marine-construction/bridge-construction) - [Construction & Replacements](https://www.jfbrennan.com/marine-construction/construction-and-replacements) - [Piers & Abutments](https://www.jfbrennan.com/marine-construction/piers-and-abutments) - [Scour & Erosion](https://www.jfbrennan.com/marine-construction/scour-and-erosion) - [Protection Systems](https://www.jfbrennan.com/marine-construction/protection-systems) - [Marine Support](https://www.jfbrennan.com/marine-construction/marine-support) - [Dam Construction](https://www.jfbrennan.com/dam-construction) - [Concrete Placement](https://www.jfbrennan.com/dam-construction/concrete-placement) - [Mass Pours](https://www.jfbrennan.com/dam-construction/mass-pours) - [Concrete Repairs](https://www.jfbrennan.com/dam-construction/concrete-repairs) - [Precast Components](https://www.jfbrennan.com/dam-construction/precast-components) - [Preplaced Aggregate Concrete](https://www.jfbrennan.com/dam-construction/preplaced-aggregate-concrete) - [Grouting](https://www.jfbrennan.com/dam-construction/grouting) - [Leave in Place Formwork](https://www.jfbrennan.com/dam-construction/leave-in-place-formwork) - [Gates and Actuators](https://www.jfbrennan.com/dam-construction/gates-actuators) - [Intakes & Headworks](https://www.jfbrennan.com/dam-construction/intakes-and-headworks) - [Underwater Inspections & Survey](https://www.jfbrennan.com/dam-construction/underwater-inspections-and-survey) - [Dive Inspections](https://www.jfbrennan.com/dam-construction/dam-inspection-diver-services) - [Acoustic Imaging](https://www.jfbrennan.com/dam-construction/acoustic-imaging) - [Hydrographic Survey](https://www.jfbrennan.com/dam-construction/hydrographic-survey) - [Side Scan Sonar](https://www.jfbrennan.com/dam-construction/side-scan-sonar) - [ROV](https://www.jfbrennan.com/dam-construction/rov-inspections) - [Underwater Construction](https://www.jfbrennan.com/dam-construction/underwater-construction) - [Cofferdams](https://www.jfbrennan.com/dam-construction/cofferdams) - [Scour & Erosion](https://www.jfbrennan.com/dam-construction/scour-and-erosion) - [Harbor Management](https://www.jfbrennan.com/harbor-management) - [Switching and Fleeting](https://www.jfbrennan.com/harbor-management/switching-and-fleeting) - [Barge Cleaning](https://www.jfbrennan.com/harbor-management/barge-cleaning) - [Dry Dock Vessel Repairs](https://www.jfbrennan.com/harbor-management/dry-dock-vessel-repairs) - [Short Haul Towing](https://www.jfbrennan.com/harbor-management/short-haul-towing) - [Marine Assists](https://www.jfbrennan.com/harbor-management/marine-assists) - [Contact Dispatch](https://www.jfbrennan.com/harbor-management/contact-dispatch) - [Customer Login](https://www.jfbrennan.com/customer-login) - [Railroad](https://www.jfbrennan.com/railroad) - [Bridge Construction](https://www.jfbrennan.com/railroad/bridge-construction) - [Construction & Replacements](https://www.jfbrennan.com/railroad/bridge-construction-and-replacements) - [Piers & Abutments](https://www.jfbrennan.com/railroad/piers-and-abutments) - [Scour & Erosion](https://www.jfbrennan.com/railroad/scour-and-erosion-repairs) - [Protection Systems](https://www.jfbrennan.com/railroad/bridge-protection-systems) - [Demolition](https://www.jfbrennan.com/railroad/demolition) - [Underwater Inspections & Survey](https://www.jfbrennan.com/railroad/underwater-inspections-and-survey) - [Culverts](https://www.jfbrennan.com/railroad/culverts) - [Environmental Response](https://www.jfbrennan.com/railroad/environmental-response) - [Marine Support](https://www.jfbrennan.com/railroad/marine-support) [MENU **](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#mobile-nav) [![Photograph of J.F. Brennan Company's harbor and dry dock](https://www.jfbrennan.com/hubfs/St.%20Croix%20Boat%20%26%20Packet%20-%20Avalon%20Paddle%20Boat-101.jpg) ](https://www.jfbrennan.com/blog/most-impactful-2023) ## [The Year's Best: Our Most Impactful Marine Industry Articles You Won't Want to Miss](https://www.jfbrennan.com/blog/most-impactful-2023) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on December 22, 2023 This year, Brennan's [blog](https://www.jfbrennan.com/blog) posts garnered an impressive readership of over 27,000. An analysis of our most searched topics identified the most significant issues in the environmental and marine construction industries, including those most relevant to our company's operations. This leads us to the question: What **were **our industry's most frequently researched topics? We've examined Brennan's most popular articles of the year -- let's count them down! [Read More](https://www.jfbrennan.com/blog/most-impactful-2023) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![Photo of Brennan amphibious dump truck and crane](https://www.jfbrennan.com/hubfs/Amphibious-Crane-Dumptruck-Remediation-Project-WI.jpg) ](https://www.jfbrennan.com/blog/no-roads-no-problem-the-advantages-of-using-amphibious-equipment) ## [The Advantages of Amphibious Equipment: No Roads, No Problem](https://www.jfbrennan.com/blog/no-roads-no-problem-the-advantages-of-using-amphibious-equipment) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on November 16, 2023 Our equipment safely navigates where barges can’t float and where ground equipment can’t trek. Brennan’s specialty amphibious trucks can float fully loaded with a 20-cubic yard payload or be configured to support geotechnical drilling equipment. See our equipment in action with this video!  [Read More](https://www.jfbrennan.com/blog/no-roads-no-problem-the-advantages-of-using-amphibious-equipment) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![Photo of Island Building at Pigs Eye Lake](https://www.jfbrennan.com/hubfs/2023%20Pigs%20Eye%20Lake%20-%20St.%20Paul%2c%20MN-101_medium.jpg) ](https://www.jfbrennan.com/blog/island-building-habitat-restoration-pigs-eye) ## [Island Building and Habitat Restoration: Utilizing Dredged Material for Environmental Benefits](https://www.jfbrennan.com/blog/island-building-habitat-restoration-pigs-eye) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on October 19, 2023 Island building and habitat restoration have significant environmental benefits, improving aquatic and land-based ecosystems. Working under LS Marine alongside Ramsey County, the U.S. Army Corps of Engineers, Saint Paul District, and the Minnesota Department of Natural Resources, Brennan built up islands at Pigs Eye Lake in Saint Paul, Minnesota. The project's master plan features seven islands, sand beaches, marsh habitat, and land plantings. We utilized dredged material from the Mississippi River in an environmentally beneficial way to build the islands. Here's how it happened and why it works! [Read More](https://www.jfbrennan.com/blog/island-building-habitat-restoration-pigs-eye) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![Photo of Ponds Behind Erie Pier](https://www.jfbrennan.com/hubfs/Still%20Duluth%20Ponds%20behind%20eries%20pier.jpg) ](https://www.jfbrennan.com/blog/sediment-remediation-erie-pier-aoc) ## [Remediating Sediment Contaminated With PCBs, PAHs, Mercury, Chromium: A Successful Clean-up Story](https://www.jfbrennan.com/blog/sediment-remediation-erie-pier-aoc) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on October 12, 2023 The US Environmental Protection Agency ([EPA](https://www.epa.gov/)) and Minnesota Pollution Control Agency ([MPCA](https://www.pca.state.mn.us/)) signed a project agreement to remediate contaminated sediment in the “ponds behind Erie Pier,” two ponds surrounded by shallow marsh wetlands in the St. Louis River Area of Concern ([AOC](https://www.epa.gov/great-lakes-aocs/st-louis-river-aoc#:~:text=Overview-,The%20St.,second%20largest%20U.S.%2Dbased%20AOC.)). The sediment was primarily contaminated with PCBs, PAHs, mercury, and chromium. Here's how we worked with stakeholders to clean up the sediment and the resulting impact of our work. [Read More](https://www.jfbrennan.com/blog/sediment-remediation-erie-pier-aoc) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![Photo of Project Manager Nick Chyko accepting the award](https://www.jfbrennan.com/hubfs/WEDA%202023%20Environmental%20Excellence%20Innovation%20Award-3.jpg) ](https://www.jfbrennan.com/blog/environmental-excellence-award-2023) ## [Brennan Accepts 2023 Environmental Excellence Award for Innovation](https://www.jfbrennan.com/blog/environmental-excellence-award-2023) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on August 31, 2023 *Originally published by the Western Dredging Association ([WEDA](https://www.westerndredging.org/index.php?option=com_acymailing&ctrl=archive&task=view&mailid=1014&key=KYOCqrmn&subid=13853-y1SjCmfdgifrvo&tmpl=component)). *The Western Dredging Association (WEDA) presented its 2023 Environmental Excellence Award for Innovation to the Howards Bay Navigation and Cleanup Dredging Project, which is located within the St. Louis River Area of Concern (SLRAOC) in Superior, Wisconsin, and is an integral part of the Port of Duluth-Superior. J.F. Brennan Company ([Brennan](https://www.jfbrennan.com/)) partnered with Arcadis and the United States Army Corps of Engineers (USACE) to work on the Howards Bay Remediation Project using innovative methods to secure a positive outcome. [Read More](https://www.jfbrennan.com/blog/environmental-excellence-award-2023) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![geotextile tubes and water treatment ](https://www.jfbrennan.com/hubfs/diver%20assisted%20dredging%20-%20Cuyahoga%202.jpg) ](https://www.jfbrennan.com/blog/diver-dredging-capping-cuyahoga) ## [Diver-Assisted Dredging and Capping Used in the Cuyahoga River Improvement Project](https://www.jfbrennan.com/blog/diver-dredging-capping-cuyahoga) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on June 15, 2023 The Cuyahoga Improvement Project in Kent, OH, aims to improve future recreation experiences while protecting existing natural resources. The purpose of our work is to remove areas of petroleum-impacted soft sediments that were deposited decades ago from discontinued industrial practices upstream.  ### **Background on a Burning River** The Cuyahoga River has quite a history: a transportation route; a boundary; an origin for oil, rubber, and steel industries; a power source; and a dumping ground. The river was once 1 of the most polluted in the country. The Cuyahoga has caught fire at least 13 times since the 1860s. [Read More](https://www.jfbrennan.com/blog/diver-dredging-capping-cuyahoga) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![geotextile tubes and water treatment ](https://www.jfbrennan.com/hubfs/IAI%20Geotextiles%20Water%20Treatment.jpg) ](https://www.jfbrennan.com/blog/iai-acquisition-2023) ## [Brennan Acquires Dredging & Dewatering Division](https://www.jfbrennan.com/blog/iai-acquisition-2023) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on February 07, 2023 February 6, 2023 — Specialty marine contractor J.F. Brennan Company, Inc. ([Brennan](https://www.jfbrennan.com/)) recently finalized the asset acquisition of the dredging and dewatering division of Infrastructure Alternatives, Inc. ([IAI](https://iaiwater.com/)). The purchase brings dewatering, water treatment, and treatability testing services into the organization for the first time. [Read More](https://www.jfbrennan.com/blog/iai-acquisition-2023) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![UWL Chancellor Joe Gow and Brennan President and CEO Matt Binsfeld formalizing the partnership between their organizations.](https://www.jfbrennan.com/hubfs/UWL-Brennan-MOU-Handshake-signing.jpg) ](https://www.jfbrennan.com/blog/uwl-partnership-2022) ## [Brennan and UW-La Crosse Announce New Partnership](https://www.jfbrennan.com/blog/uwl-partnership-2022) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on October 19, 2022 The University of Wisconsin-La Crosse ([UWL](https://www.uwlax.edu/)) and J.F. Brennan Company, Inc. ([Brennan](https://www.jfbrennan.com/)) formally announce their partnership. The agreement between Brennan and UWL will further the educational opportunities for students studying environmental science, equipping them to start on the job right after they graduate. Brennan is partnering with UWL to support student research and curriculum, and to strengthen the talent pipeline, both locally and within the environmental services industry. [Read More](https://www.jfbrennan.com/blog/uwl-partnership-2022) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![J.F. Brennan Company team photograph at WEDA in Houston, TX.](https://www.jfbrennan.com/hubfs/WEDA_Houston_2022_Awards_Group.jpeg) ](https://www.jfbrennan.com/blog/andrew-timmis-weda-safety-excellence-2022) ## [Andrew Timmis Awarded for Safety Excellence](https://www.jfbrennan.com/blog/andrew-timmis-weda-safety-excellence-2022) Posted by [Kimberly Walters](https://www.jfbrennan.com/blog/author/kimberly-walters) on September 13, 2022 *Originally announced by the Western Dredging Association ([WEDA](https://www.westerndredging.org/)).* In recognition of his extensive and outstanding contributions to the dredging community and to the Western Dredging Association, Andrew A. Timmis has been named the 2022 Dredger of the Year at the WEDA Summit & Expo held in Houston, Texas.  Working for many years on the frontlines of environmental dredging, when Mr. Timmis joined WEDA in 2004, he became a member of its Environmental Commission. He helped develop policy for the group and pointed out the need to provide a program for regulators to learn about environmental issues. [Read More](https://www.jfbrennan.com/blog/andrew-timmis-weda-safety-excellence-2022) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![Sediment Processing Operations (C) 2020 J.F. Brennan Company](https://www.jfbrennan.com/hubfs/2020%20Sediment%20Processing%20Operations.jpg) ](https://www.jfbrennan.com/blog/remediation-grasse-river-massena) ## [3+ Years of Remediation on the Grasse River Conclude With Success](https://www.jfbrennan.com/blog/remediation-grasse-river-massena) Posted by [Sam Crawford, Project Manager](https://www.jfbrennan.com/blog/author/sam-crawford-project-manager) on April 19, 2022 Last fall, J.F. Brennan Company, Inc. (Brennan) crews successfully concluded environmental remediation efforts after 3.5 years on the Grasse River in Massena, NY. This project had a challenging scope involving dredging, material processing, water treatment, mussel relocation, capping, and habitat restoration. Through a combination of strong teamwork and outstanding production efficiencies, our team completed every phase of work and executed a safe demobilization. Here’s how we did it. [Read More](https://www.jfbrennan.com/blog/remediation-grasse-river-massena) [**{count-facebook}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-twitter}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**{count-linkedin}](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#)[**](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) [![](https://www.jfbrennan.com/hubfs/images/pagination-left.png) Newer Posts](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/1) [All posts](https://www.jfbrennan.com/blog/all) [Older Posts ![](https://www.jfbrennan.com/hubfs/images/pagination-right.png)](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/3) ### Subscribe Here! ### Latest Blog Posts ### Posts by Topic - [Marine Construction (70)](https://www.jfbrennan.com/blog/topic/marine-construction) - [Corporate Culture (53)](https://www.jfbrennan.com/blog/topic/corporate-culture) - [Employee Engagement (50)](https://www.jfbrennan.com/blog/topic/employee-engagement) - [Great Place to Work (44)](https://www.jfbrennan.com/blog/topic/great-place-to-work) - [Environmental Dredging (41)](https://www.jfbrennan.com/blog/topic/environmental-dredging) - [J.F. Brennan Company (40)](https://www.jfbrennan.com/blog/topic/j-f-brennan-company) - [Between the Trees (38)](https://www.jfbrennan.com/blog/topic/between-the-trees) - [Environmental Remediation (36)](https://www.jfbrennan.com/blog/topic/environmental-remediation) - [safety culture (32)](https://www.jfbrennan.com/blog/topic/safety-culture) - [Safety Management (31)](https://www.jfbrennan.com/blog/topic/safety-management) - [safety (31)](https://www.jfbrennan.com/blog/topic/safety) - [Hydraulic Dredging (29)](https://www.jfbrennan.com/blog/topic/hydraulic-dredging) - [Dive Services (28)](https://www.jfbrennan.com/blog/topic/dive-services) - [Dredging (28)](https://www.jfbrennan.com/blog/topic/dredging) - [Total Quality Management (28)](https://www.jfbrennan.com/blog/topic/total-quality-management) - [Dam Construction (27)](https://www.jfbrennan.com/blog/topic/dam-construction) - [Underwater construction (27)](https://www.jfbrennan.com/blog/topic/underwater-construction) - [careers (26)](https://www.jfbrennan.com/blog/topic/careers) - [Dam Repairs (25)](https://www.jfbrennan.com/blog/topic/dam-repairs) - [Construction Safety (21)](https://www.jfbrennan.com/blog/topic/construction-safety) - [Lock and Dams (20)](https://www.jfbrennan.com/blog/topic/lock-and-dams) - [Dewatering (18)](https://www.jfbrennan.com/blog/topic/dewatering) - [Dive Inspections (18)](https://www.jfbrennan.com/blog/topic/dive-inspections) - [Community Engagement (17)](https://www.jfbrennan.com/blog/topic/community-engagement) - [Wetland Restoration (15)](https://www.jfbrennan.com/blog/topic/wetland-restoration) - [commercial diving (15)](https://www.jfbrennan.com/blog/topic/commercial-diving) - [mechanical dredging (15)](https://www.jfbrennan.com/blog/topic/mechanical-dredging) - [Contaminated Sediments (14)](https://www.jfbrennan.com/blog/topic/contaminated-sediments) - [Health and Safety Programs (14)](https://www.jfbrennan.com/blog/topic/health-and-safety-programs) - [Risk Mitigation (13)](https://www.jfbrennan.com/blog/topic/risk-mitigation) - [Underwater Concrete Repairs (13)](https://www.jfbrennan.com/blog/topic/underwater-concrete-repairs) - [Quality Management System (12)](https://www.jfbrennan.com/blog/topic/quality-management-system) - [habitat restoration (12)](https://www.jfbrennan.com/blog/topic/habitat-restoration) - [Dredge Operator (11)](https://www.jfbrennan.com/blog/topic/dredge-operator) - [Marshland Remediation (11)](https://www.jfbrennan.com/blog/topic/marshland-remediation) - [Water Management (11)](https://www.jfbrennan.com/blog/topic/water-management) - [Infrastructure (10)](https://www.jfbrennan.com/blog/topic/infrastructure) - [Internship Program (10)](https://www.jfbrennan.com/blog/topic/internship-program) - [Mobilization (10)](https://www.jfbrennan.com/blog/topic/mobilization) - [Safety Based Observation Program (10)](https://www.jfbrennan.com/blog/topic/safety-based-observation-program) - [Shoreline Repairs (10)](https://www.jfbrennan.com/blog/topic/shoreline-repairs) - [Submarine Cabling (10)](https://www.jfbrennan.com/blog/topic/submarine-cabling) - [Hydro (9)](https://www.jfbrennan.com/blog/topic/hydro) - [Underwater Inspection (9)](https://www.jfbrennan.com/blog/topic/underwater-inspection) - [Underwater Remediation (9)](https://www.jfbrennan.com/blog/topic/underwater-remediation) - [marshland restoration (9)](https://www.jfbrennan.com/blog/topic/marshland-restoration) - [cofferdam (8)](https://www.jfbrennan.com/blog/topic/cofferdam) - [training (8)](https://www.jfbrennan.com/blog/topic/training) - [waterways (8)](https://www.jfbrennan.com/blog/topic/waterways) - [Amphibious Equipment (7)](https://www.jfbrennan.com/blog/topic/amphibious-equipment) - [Diving Regulations (7)](https://www.jfbrennan.com/blog/topic/diving-regulations) - [Harbor Management (7)](https://www.jfbrennan.com/blog/topic/harbor-management) - [barge terminals (7)](https://www.jfbrennan.com/blog/topic/barge-terminals) - [geotextile tubes (7)](https://www.jfbrennan.com/blog/topic/geotextile-tubes) - [Barge Transportation (6)](https://www.jfbrennan.com/blog/topic/barge-transportation) - [Bridge Pier Repairs (6)](https://www.jfbrennan.com/blog/topic/bridge-pier-repairs) - [Broadcast Capping System (6)](https://www.jfbrennan.com/blog/topic/broadcast-capping-system) - [Hazardous Conditions (6)](https://www.jfbrennan.com/blog/topic/hazardous-conditions) - [ISO Certification (6)](https://www.jfbrennan.com/blog/topic/iso-certification) - [Remote Worksites (6)](https://www.jfbrennan.com/blog/topic/remote-worksites) - [Scour Repair (6)](https://www.jfbrennan.com/blog/topic/scour-repair) - [Costs (5)](https://www.jfbrennan.com/blog/topic/costs) - [Diving Plan (5)](https://www.jfbrennan.com/blog/topic/diving-plan) - [Hazard Mitigation (5)](https://www.jfbrennan.com/blog/topic/hazard-mitigation) - [Water Treatment (5)](https://www.jfbrennan.com/blog/topic/water-treatment) - [gate repairs (5)](https://www.jfbrennan.com/blog/topic/gate-repairs) - [underwater scour (5)](https://www.jfbrennan.com/blog/topic/underwater-scour) - [Capping (4)](https://www.jfbrennan.com/blog/topic/capping) - [Diving Equipment (4)](https://www.jfbrennan.com/blog/topic/diving-equipment) - [Material Disposal (4)](https://www.jfbrennan.com/blog/topic/material-disposal) - [Permitting (4)](https://www.jfbrennan.com/blog/topic/permitting) - [Radial Gates (4)](https://www.jfbrennan.com/blog/topic/radial-gates) - [Tainter Gates (4)](https://www.jfbrennan.com/blog/topic/tainter-gates) - [Transport Distance (4)](https://www.jfbrennan.com/blog/topic/transport-distance) - [Treatability (4)](https://www.jfbrennan.com/blog/topic/treatability) - [sheet pile (4)](https://www.jfbrennan.com/blog/topic/sheet-pile) - [turbidity curtain (4)](https://www.jfbrennan.com/blog/topic/turbidity-curtain) - [Broadcast Capping (3)](https://www.jfbrennan.com/blog/topic/broadcast-capping) - [Hydrographic survey (3)](https://www.jfbrennan.com/blog/topic/hydrographic-survey) - [Preplaced Aggregate Concrete (3)](https://www.jfbrennan.com/blog/topic/preplaced-aggregate-concrete) - [Railroad Bridge (3)](https://www.jfbrennan.com/blog/topic/railroad-bridge) - [Run Times (3)](https://www.jfbrennan.com/blog/topic/run-times) - [Submarine Cable (3)](https://www.jfbrennan.com/blog/topic/submarine-cable) - [foundations (3)](https://www.jfbrennan.com/blog/topic/foundations) - [post tensioning anchors (3)](https://www.jfbrennan.com/blog/topic/post-tensioning-anchors) - [scour (3)](https://www.jfbrennan.com/blog/topic/scour) - [survey (3)](https://www.jfbrennan.com/blog/topic/survey) - [AB Mats (2)](https://www.jfbrennan.com/blog/topic/ab-mats) - [AWO-RCP (2)](https://www.jfbrennan.com/blog/topic/awo-rcp) - [Box Cofferdam (2)](https://www.jfbrennan.com/blog/topic/box-cofferdam) - [Braced Cofferdam (2)](https://www.jfbrennan.com/blog/topic/braced-cofferdam) - [Cellular Cofferdam (2)](https://www.jfbrennan.com/blog/topic/cellular-cofferdam) - [EMR (2)](https://www.jfbrennan.com/blog/topic/emr) - [Gate Hoist Lines (2)](https://www.jfbrennan.com/blog/topic/gate-hoist-lines) - [Helical Piles (2)](https://www.jfbrennan.com/blog/topic/helical-piles) - [Polymer (2)](https://www.jfbrennan.com/blog/topic/polymer) - [RTK-GPS (2)](https://www.jfbrennan.com/blog/topic/rtk-gps) - [Railroad Construction (2)](https://www.jfbrennan.com/blog/topic/railroad-construction) - [Remotely Operated Vehicle (ROVs) (2)](https://www.jfbrennan.com/blog/topic/remotely-operated-vehicle-rovs) - [Sand Cover (2)](https://www.jfbrennan.com/blog/topic/sand-cover) - [Scour Protection (2)](https://www.jfbrennan.com/blog/topic/scour-protection) - [Subchapter M (2)](https://www.jfbrennan.com/blog/topic/subchapter-m) - [Underwater Welding (2)](https://www.jfbrennan.com/blog/topic/underwater-welding) - [bridge pier (2)](https://www.jfbrennan.com/blog/topic/bridge-pier) - [dock repairs (2)](https://www.jfbrennan.com/blog/topic/dock-repairs) - [shipping terminals (2)](https://www.jfbrennan.com/blog/topic/shipping-terminals) - [stray current corrosion (2)](https://www.jfbrennan.com/blog/topic/stray-current-corrosion) - [Diver Assisted Micro Dredging (1)](https://www.jfbrennan.com/blog/topic/diver-assisted-micro-dredging) - [Diver-welder (1)](https://www.jfbrennan.com/blog/topic/diver-welder) - [Face Thickness (1)](https://www.jfbrennan.com/blog/topic/face-thickness) - [Harbor Repairs (1)](https://www.jfbrennan.com/blog/topic/harbor-repairs) - [Incident Rates (1)](https://www.jfbrennan.com/blog/topic/incident-rates) - [Leverman (1)](https://www.jfbrennan.com/blog/topic/leverman) - [Portadam (1)](https://www.jfbrennan.com/blog/topic/portadam) - [Shore Power (1)](https://www.jfbrennan.com/blog/topic/shore-power) - [anodes (1)](https://www.jfbrennan.com/blog/topic/anodes) - [bathymetric survey (1)](https://www.jfbrennan.com/blog/topic/bathymetric-survey) - [bridge replacements (1)](https://www.jfbrennan.com/blog/topic/bridge-replacements) - [cathodic protection (1)](https://www.jfbrennan.com/blog/topic/cathodic-protection) - [diver dredging (1)](https://www.jfbrennan.com/blog/topic/diver-dredging) - [experience modification rates (1)](https://www.jfbrennan.com/blog/topic/experience-modification-rates) - [floc (1)](https://www.jfbrennan.com/blog/topic/floc) [see all](https://www.jfbrennan.com/blog/topic/environmental-dredging/page/2#) ![j-f-brennan-company-logo-horizontal](https://www.jfbrennan.com/hs-fs/hubfs/images/j-f-brennan-company-logo-horizontal.png?width=1465&name=j-f-brennan-company-logo-horizontal.png "j-f-brennan-company-logo-horizontal") [Privacy Policy](https://www.jfbrennan.com/privacy-policy) © 2026 J.F. Brennan Company, Inc. #### Main Office Location: 818 Bainbridge Street La Crosse, WI 54603 Phone: 608/784-7173 Fax: 608/785-2090 Payroll Fax: 608/881-6519 [All Brennan Locations](https://www.jfbrennan.com/contact-us) #### [Careers](https://www.jfbrennan.com/careers) #### 24 Hour Dispatch: 24/7 Service Call 800-658-9027 #### Workplace Posters: [Federal](https://www.jfbrennan.com/hubfs/Jobsite%20Posters/Federal-Jobsite-Posters.pdf) [States A-M](https://www.jfbrennan.com/hubfs/Jobsite%20Posters/States-A-M.pdf) [States N-W](https://www.jfbrennan.com/hubfs/Jobsite%20Posters/States-N-W.pdf) #### Connect: [**](https://www.instagram.com/jfbrennancompany) [**](https://www.facebook.com/Brennan1919) [**](https://www.linkedin.com/company/j-f-brennan-company-inc) [**](https://www.youtube.com/channel/UCcGPPk74MFOXwW2rN4EwgUg)   ![GPTW Certification 20-21](https://www.jfbrennan.com/hs-fs/hubfs/GPTW%20Certification%2020-21.png?width=35&name=GPTW%20Certification%2020-21.png)   © 2026 J.F. Brennan Company, Inc. [**](https://www.facebook.com/Brennan1919) [**](https://www.linkedin.com/company/j-f-brennan-company-inc) [**](https://www.youtube.com/channel/UCcGPPk74MFOXwW2rN4EwgUg) - [Environmental](https://www.jfbrennan.com/environmental) - [Dewatering Services](https://www.jfbrennan.com/environmental/separation-and-dewatering) - [Environmental Dredging](https://www.jfbrennan.com/environmental/environmental-dredging) - [Habitat Restoration](https://www.jfbrennan.com/environmental/habitat-restoration) - [Isolation Barriers](https://www.jfbrennan.com/environmental/isolation-barriers) - [Mobile Water Treatment Trailer](https://www.jfbrennan.com/environmental/mobile-water-treatment-trailer) - [Sand Covers and Capping](https://www.jfbrennan.com/environmental/sand-covers-and-capping) - [Treatability Testing](https://www.jfbrennan.com/environmental/treatability) - [Water Treatment ](https://www.jfbrennan.com/environmental/water-treatment) - [Wetland Remediation](https://www.jfbrennan.com/environmental/wetland-remediation) - [Marine Construction](https://www.jfbrennan.com/marine-construction) - [Submarine Cable Services](https://www.jfbrennan.com/submarine-cable) - [Dock Structures & Barge Terminals](https://www.jfbrennan.com/marine-constuction/dock-structures-and-barge-terminals) - [Deep Foundations](https://www.jfbrennan.com/marine-construction/deep-foundations) - [Dredging](https://www.jfbrennan.com/marine-construction/dredging) - [Underwater Inspections & Survey](https://www.jfbrennan.com/marine-construction/underwater-inspections-and-survey) - [Underwater Construction](https://www.jfbrennan.com/marine-construction/underwater-construction) - [Maritime Security Barrier Systems](https://www.jfbrennan.com/maritime-security-barriers) - [Bridge Construction](https://www.jfbrennan.com/marine-construction/bridge-construction) - [Marine Support](https://www.jfbrennan.com/marine-construction/marine-support) - [Dam Construction](https://www.jfbrennan.com/dam-construction) - [Concrete Placement](https://www.jfbrennan.com/dam-construction/concrete-placement) - [Gates and Actuators](https://www.jfbrennan.com/dam-construction/gates-actuators) - [Intakes & Headworks](https://www.jfbrennan.com/dam-construction/intakes-and-headworks) - [Underwater Inspections & Survey](https://www.jfbrennan.com/dam-construction/underwater-inspections-and-survey) - [Underwater Construction](https://www.jfbrennan.com/dam-construction/underwater-construction) - [Cofferdams](https://www.jfbrennan.com/dam-construction/cofferdams) - [Scour & Erosion](https://www.jfbrennan.com/dam-construction/scour-and-erosion) - [Harbor Management](https://www.jfbrennan.com/harbor-management) - [Switching and Fleeting](https://www.jfbrennan.com/harbor-management/switching-and-fleeting) - [Barge Cleaning](https://www.jfbrennan.com/harbor-management/barge-cleaning) - [Dry Dock Vessel Repairs](https://www.jfbrennan.com/harbor-management/dry-dock-vessel-repairs) - [Short Haul Towing](https://www.jfbrennan.com/harbor-management/short-haul-towing) - [Marine Assists](https://www.jfbrennan.com/harbor-management/marine-assists) - [Contact Dispatch](https://www.jfbrennan.com/harbor-management/contact-dispatch) - [Customer Login](https://www.jfbrennan.com/customer-login) - [Railroad](https://www.jfbrennan.com/railroad) - [Bridge Construction](https://www.jfbrennan.com/railroad/bridge-construction) - [Underwater Inspections & Survey](https://www.jfbrennan.com/railroad/underwater-inspections-and-survey) - [Culverts](https://www.jfbrennan.com/railroad/culverts) - [Environmental Response](https://www.jfbrennan.com/railroad/environmental-response) - [Marine Support](https://www.jfbrennan.com/railroad/marine-support) - ** - [About Us](https://www.jfbrennan.com/about-us) - History - [Culture](https://www.jfbrennan.com/culture) - [Contact Us](https://www.jfbrennan.com/contact-us) - [Blog](https://www.jfbrennan.com/blog) - [Careers](https://www.jfbrennan.com/careers) - [Why Brennan?](https://www.jfbrennan.com/careers/why-brennan) - [Benefits](https://www.jfbrennan.com/careers/professional-and-technical) - [Current Openings](https://www.jfbrennan.com/careers/current-openings) - Online Application - [Brennan Gives Back](https://www.jfbrennan.com/givesback) - [Plan Room](http://www.brennanopr.com/) Copyright © 2015 J.F. Brennan Co. Inc.