OBG is working alongside the Shell Rock River Watershed District in south central Minnesota to improve water quality. For many years, the District has been implementing upstream and land-based watershed protection measures aimed at preserving their waterways.

However, one waterbody, Fountain Lake, has impaired water quality that cannot be improved by only upstream protection projects due to internal nutrient loading from deposited sediment.

Approximately 65 percent of the annual phosphorus loading to the more than 500-acre Fountain Lake is from internal sources (e.g., phosphorus release from lake-bottom sediment). The restoration of this recreational lake has started with the significant task of sediment removal via dredging. As experienced experts in sediment management and removal projects, OBG has developed and implemented a successful workplan for the District.

Confined disposal facility for placement of dredged sediment

Following the sediment removal project, Fountain Lake will have less internal nutrient loading. This is expected to result in clearer water and a decrease in algal blooms. In addition, the lake will have greater water depths to improve lake stratification for fish and aquatic habitat, and better recreational opportunities for boaters.

How Can We Help?

OBG has a long history of sediment management on some of the most challenging waterway projects in the U.S. For example, our experts have helped to restore the Lower Fox River (WI), Hudson River (NY), Indiana Harbor and Canal (IN), Onondaga Lake (NY), and Duwamish River (WA).

If your waterway restoration plans include sediment management or dredging, our experts can assist you in successful development and implementation of your project.

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