Introduction
In 2026, the North Branch of the Manitowoc River in Calumet County, Wisconsin, will undergo a vital river dredging operation designed to alleviate chronic flooding and rejuvenate the surrounding wetland ecosystem. The project, spearheaded by the Wisconsin Department of Natural Resources (DNR) in partnership with Ducks Unlimited, will remove dense cattail mats and accumulated sediment that have obstructed water flow and severely impacted both agricultural lands and native wildlife habitats.
This project represents more than just an infrastructure upgrade—it’s a strategic environmental restoration initiative that highlights the importance of dredging in managing natural waterways, reducing flood risks, and preserving local biodiversity.
Understanding River Dredging
River dredging is the process of removing sediments, vegetation, and other debris that accumulate at the bottom of rivers, streams, and other water bodies. Over time, sediment buildup can restrict water flow, reduce channel depth, and create bottlenecks that lead to flooding. In wetlands and floodplains, dense growth of invasive vegetation—such as cattails—can worsen these conditions, leading to stagnant water, habitat degradation, and increased flood risk during heavy rains or snowmelt events.
The dredging of the Manitowoc River aims to address exactly these issues. The target area, a 1,100-foot section of the river’s North Branch located near the Brillion State Wildlife Area, is known for its frequent flooding, which affects more than 100 local farms. By restoring the river’s original depth and removing obstructions, the project will reestablish efficient water flow and reduce the risk of overbank flooding in future storm events.
Why This Dredging Project Matters
For years, residents in and around the Brillion area have voiced concerns about increasing flood frequency and severity. The sediment-choked river has caused repeated damage to farmland, disrupted local ecosystems, and made portions of the wetland inaccessible to both wildlife and humans.
The 2026 dredging project is expected to:
- Reduce flooding across agricultural areas
- Improve public access to the river for recreation (canoeing, kayaking)
- Enhance water quality by restoring natural flow
- Support native vegetation and wildlife by clearing invasive cattail mats
- Boost biodiversity in the Brillion State Wildlife Area
By addressing these key concerns, the Manitowoc River dredging project reflects a comprehensive approach to ecological restoration and flood management.
Funding and Political Context
The funding for the project comes from waterfowl stamp funds awarded by the Waterfowl Advisory Committee and conservation funds from the DNR. However, the project has not been without political friction.
Wisconsin Governor Tony Evers vetoed a legislative earmark for the project from the state’s General Purpose Revenue (GPR) budget, citing broader disagreements with the legislature over environmental funding priorities. While the veto raised tensions, the DNR later clarified that funding was already secured through existing programs, and the project would move forward regardless of the veto.
Despite the political debate, one thing remains clear: the residents of Calumet County, particularly the farming community in Brillion, have advocated tirelessly for this project, and their persistence has played a critical role in moving it forward.
Project Scope and Environmental Impact
According to preliminary plans, the dredging will cover:
- A 1,100-foot stretch of the Manitowoc River
- A channel width of approximately 15–20 feet
- A depth of 3.5 to 4 feet
- Dredged material will be spread over a nearby upland prairie grass field
This approach ensures minimal ecological disruption while maximizing benefits to both people and wildlife. The cleared channel will improve drainage, particularly during spring thaws and intense summer storms. In addition, the removal of invasive cattail mats will allow native plant species to reestablish, supporting healthier wetland ecosystems.
Ducks Unlimited, a national nonprofit dedicated to the conservation of wetlands and waterfowl, is a key partner in this initiative. Their involvement brings expertise in habitat restoration and ensures that the river dredging is done in an environmentally responsible and sustainable manner.
Ecological and Community Benefits
One of the most significant benefits of this dredging project is the potential for ecological renewal. Invasive cattails have dominated the river’s edge, outcompeting native species and creating a monoculture that reduces overall biodiversity. Once removed, native grasses, sedges, and flowering plants can return, providing critical habitat for birds, amphibians, and aquatic life.
Waterfowl, in particular, are expected to benefit greatly. Open water channels will improve foraging and nesting opportunities, aligning with broader conservation goals for migratory bird populations. Additionally, improved river access will support outdoor recreation such as birdwatching, paddling, and nature photography—activities that contribute to local tourism and community well-being.
For the farming community, the dredging will help safeguard fields from waterlogging and reduce costly flood-related damage. With agriculture being a key component of Calumet County’s economy, the reduction in flood risk is a welcome development.
What’s Next?
Engineering and environmental assessments will begin in the fall of 2025. This stage will include:
- Site surveys and hydrologic studies
- Environmental impact assessments
- Community input and public hearings
- Final design and permitting
Actual dredging operations are scheduled for the summer of 2026, with project completion expected before the end of that year.
The Wisconsin DNR has committed to providing updates throughout the process, ensuring transparency and continued community involvement. Local residents and stakeholders are encouraged to stay informed through public meetings and DNR communications.
Conclusion
The 2026 river dredging project in Calumet County marks a critical step forward in managing natural water systems in rural Wisconsin. By removing sediment and cattail mats from the Manitowoc River’s North Branch, the project promises to significantly reduce flooding, restore native habitats, and improve recreational access for the public.
Though the path to implementation has involved political challenges, the unified efforts of residents, conservationists, and government agencies have kept the project on track. As climate variability increases and communities grapple with more frequent flood events, projects like this offer a blueprint for effective, nature-based solutions.
Through smart planning, sound engineering, and sustainable dredging practices, Calumet County is not only restoring a river—it’s building resilience for the future.