Client: Wisconsin Department of Natural Resources
Location: Superior, Wisconsin
The Pickle Pond project represents a significant effort in sediment remediation and habitat restoration within the St. Louis River Estuary. This 9-acre urban waterway has undergone extensive rehabilitation to address historical contamination from sewage and runoff, enhancing both ecological integrity and community engagement. The primary goals included the restoration of fish and wildlife habitat, improvement of sediment quality, and the establishment of recreational opportunities for local residents.
The project involved a multifaceted approach to restore Pickle Pond’s ecological health. Key activities included the removal of 16,500 cubic yards of contaminated sediment, which resulted in an impressive 86% reduction in mercury and an 87% reduction in lead levels, comparable to the weight of approximately 215 car batteries. Additionally, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were reduced by 92-94%. The project also focused on habitat restoration through the creation of deeper water areas and the installation of 13 structures designed to enhance habitats for fish and turtles, along with 6 nesting structures for birds. Invasive species were controlled in at least 8.4 acres, and native plant communities were reestablished to improve overall ecosystem health.
Key Achievements
The successful execution of the Pickle Pond project yielded significant quantitative and qualitative outcomes. The restoration of 19 acres of fish and wildlife habitat has provided critical support for local biodiversity. Furthermore, the project has facilitated improved public access to the waterfront by creating new openings in the embankment that reconnect Pickle Pond to Barker’s Bay for the first time in over 130 years. This enhanced connectivity has not only improved habitat suitability for a diverse range of species but has also increased recreational opportunities for activities such as kayaking and paddleboarding.
The project has been recognized for its effective community engagement, with multiple public tours held during construction and no complaints received from stakeholders. The collaboration among various federal, state, and local agencies, alongside private entities, has fostered a unique partnership model that emphasizes problem-solving and open communication. This collaborative spirit has been critical in navigating challenges and ensuring project success.
