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Elevated Sediment Levels

The Le Sueur River is one of the leading contributors of sediment and nutrients to the Minnesota River. With the goal of improving watershed health and building resiliency in the system, DNR specialists have assessed watershed hydrology trends and stream channel stability. Stream stability assessments examine physical characteristics of streams and rivers, based on how they formed over time and how they are responding to changes. Results can be used to understand current conditions, changes and trends, and to develop targeted strategies to restore and protect watershed health.



Erosion and Sedimentation

The Le Sueur River and many of its tributaries are known to be impaired for suspended solids (sediment). Recent research shows the largest sources of sediment are from channel, bank and bluff erosion. The geologic history of the watershed leaves certain areas naturally vulnerable to erosion. However, watershed wide stream and river instability is resulting in higher erosion rates, poor habitat, loss of land, degraded water quality, and impacts to nearby infrastructure.


Learn More about Sediment

Source: DNR Hydrology and Connectivity Report

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