The purpose of this project is to develop a framework to implement best management practices (BMPs) on ditches in headwater areas utilizing a partnership between drainage staff and the Greater Blue Earth River Basin Alliance (GBERBA). By replacing failing side-inlets with an alternative design, we can make strides towards our water quality and water quantity goals. The alternative inlets serve to prevent sediment and phosphorus from washing downstream and the design can also alleviate peak flows by temporarily storing stormwater.
Improved levels of civic engagement and community participation in support for the Watershed Restoration and Protection Strategy (WRAPS) processes in the St. Louis River, Lake Superior South, and Cloquet River Watersheds. Monitoring plans and compiled field data will be provided and summarized that will aid in the future completion of Total Maximum Daily Load Reports (TMDLs) in these watersheds and in the Lake Superior North Watershed.
The project’s first phase includes development and implementation of a sampling plan to investigate stormwater quality within impervious areas; soil borings to determine the soil type; a topographical survey to determine drainage patterns and infrastructure locations; and data gathering of existing infrastructure. A season-long stormwater quality monitoring program will monitor stormwater within the drainage areas that flow directly to the storm sewer, including monitoring of roof runoff and overland flow to determine potential pollutant sources and mitigation options.
This monitoring work expands on previously established routine water quality and flow sampling to include extensive fish and aquatic invertebrate surveys. Subsequent steps include assessment of the monitoring data to determine impairments, identification of stressors that are causing impairments, development of Total Maximum Daily Load (TMDL) studies using identification of pollutant sources using computer modeling and other techniques, civic engagement, and public education as approaches in progress towards water quality goals.
Locating the sources of sediment, phosphorus, and bacteria is integral to reducing the effect they have on a water body. The completion of the West Fork Des Moines River (WFDMR) Targeting and Prioritizing Endeavor will result in a set of data that is the most cost-effective for the implementation of Best Management Practices (BMPs) for all identified priority resources. The results will be expressed as the maximum reduction of a water quality contaminant (e.g. sediment, phosphorus, bacteria) at a priority resource (e.g. an impaired stream) for a given level of investment.