The Great Lakes Navigation System is a crucial economic waterway. With approximately 3–5 million cubic yards (2.3–3.8 million cubic meters) of sediment dredged annually to keep these waters safe and navigable, managing these materials effectively is essential. In recent years, the U.S. Army Corps of Engineers and other stakeholders have recognized the potential benefits of reusing dredged sediments for positive economic, environmental, and social outcomes. This article explores the need for improved dredged material management practices in the Great Lakes and highlights new strategies to boost beneficial use by 2030.
Why Dredged Material Management Matters in the Great Lakes
The Great Lakes play a vital role in the economy, supporting industries such as shipping, manufacturing, and tourism. Maintaining safe waterways requires regular dredging, which removes millions of cubic yards of sediment each year. Effective management of this dredged material is essential to balance the needs of industry, environmental health, and community welfare.
Current Challenges in Beneficial Use of Dredged Materials
Limited Reuse of Dredged Sediments
Despite the potential advantages, historically, less than 25% of dredged materials have been reused beneficially in nearshore environments. This low percentage indicates a missed opportunity to enhance ecosystems, reduce landfill use, and even create land reclamation projects that benefit surrounding communities.
The Need for More Sustainable Practices
Improving dredged material management practices requires a shift towards sustainable practices that consider the economic, environmental, and social impacts of sediment reuse. By doing so, the Great Lakes region can aim to meet the goal of reusing 70% of dredged sediments beneficially by 2030.
Key Goals for Improved Dredged Material Management by 2030
The primary objective for the U.S. Army Corps of Engineers and other stakeholders is to increase the beneficial use of dredged materials to 70% by 2030. This goal aligns with a commitment to sustainability, reducing waste, and supporting regional economic growth.
Strategies to Overcome Dredging Challenges
Implementing Best Practices for Sediment Management
One of the main strategies for improving dredged material management involves implementing best practices that encourage beneficial reuse. This can include using sediments for habitat restoration, beach nourishment, and land reclamation. By placing dredged materials in ways that benefit the environment, the Great Lakes can enhance both biodiversity and recreational opportunities.
New Research and Reports Supporting Beneficial Reuse
The U.S. Army Engineer Research and Development Center has released a comprehensive report that reviews successful dredged material reuse projects, offering insights and guidance for other stakeholders. This report is a valuable resource for expanding beneficial-use-placement practices across the Great Lakes region, serving as a roadmap for future projects.
Benefits of Improved Dredged Material Management
Economic Benefits
Repurposing dredged materials can stimulate economic growth by supporting local construction projects, reducing landfill disposal costs, and creating opportunities for new land uses.
Environmental Benefits
Environmental restoration, such as wetland creation and erosion control, is a significant benefit of reusing dredged materials. These projects help improve water quality, protect shorelines, and enhance habitats for local wildlife.
Social Benefits
Beneficial reuse can also support community well-being by restoring recreational areas, protecting coastal communities from erosion, and creating more sustainable, aesthetically pleasing waterfronts.
Moving Forward: A Sustainable Future for the Great Lakes
Improving dredged material management practices in the Great Lakes is essential for fostering a sustainable future. With ambitious goals and a clear strategy, stakeholders can transform dredging from a necessary maintenance task into an opportunity for regional growth and environmental stewardship. By following the best practices outlined in recent research, the Great Lakes region is well-positioned to achieve its 2030 goal and make dredged material management a positive force for change.
Conclusion
With the target of reusing 70% of dredged sediments by 2030, the Great Lakes region is taking a proactive approach to sustainable dredged material management. Through the efforts of the U.S. Army Corps of Engineers and guidance from recent reports, beneficial reuse can become a powerful tool for economic growth, environmental protection, and community enhancement.