This project will allow monitoring to take place on nine stream sites and characterize their water quality and determine their impaired status for biological and chemical parameters. The physical and chemical measurements will include dissolved oxygen, pH, temperature, conductivity, transparency, total phosphorus, total Kjeldahl nitrogen, total suspended solids, total volatile solids, nitrite-nitrate nitrogen, chloride, sulfate, hardness and e-coli.
The soil and water conservation districts within the watersheds for the Redwood and Cottonwood Rivers have been putting conservation practices on the ground for years in a long-running collaborative effort.
The Southwest Prairie Technical Service Area 5 (SWPTSA), located in the southwest corner of Minnesota, encompasses 11 Soil and Water Conservation Districts (SWCDs): Cottonwood, Jackson, Lac Qui Parle, Lincoln, Lyon, Murray, Nobles, Pipestone, Redwood, Rock, and Yellow Medicine. This project will protect natural resources within the three major river basins of Minnesota, Missouri and Des Moines Rivers. The SWPTSA will assist member SWCDs in locating and identifying priority subwatersheds that have soil erosion and water quality issues using terrain analysis.
Tetra Tech will work to support the science needed when planning in Minnesota for water storage practice implementation. The goal is to provide practical water storage recommendations that can be incorporated into smaller scale planning within major watersheds (HUC 8), as well as larger scale planning for the Sediment Reduction Strategy for the Minnesota River and South Metro Mississippi River.
The Yellow Medicine One Watershed One Plan has identified Protecting and Preserving Groundwater Quality and Quantity as one of the three priorities addressed in the Plan. Seven priority sub-watersheds have been identified as priority areas, as well as two townships that have been identified by the Department of Agriculture to have vulnerable groundwater areas. Our goal is to provide 50% cost share to seal 34 abandoned wells that are located in these priority areas.
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.
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.
The United States Environmental Protection Agency (USEPA) requires the Minnesota Pollution Control Agency (MPCA) to carry out the Total Maximum Daily Load Program (TMDL) in the state of Minnesota. Minnesota has an abundance of lakes and river reaches, many of which will require a TMDL study. In an effort to expedite the completion of TMDL projects, the MPCA has decided to construct watershed models. These models have the potential to support the simultaneous development of TMDL studies for multiple listings within a cataloging unit or 8-digit Hydrologic Unit Code watershed.
This project will monitor four lakes and 18 stream sites within the Yellow Medicine River Watershed to collect surface water quality data to determine the health of the watershed's streams and lakes and if they are in need of restoration or protection strategies. The sites will be monitored according to the Minnesota Pollution Control Agency's (MPCA) Water Monitoring Standard Operating Procedures.
The Yellow Medicine River Watershed District will contract with the Water Resource Center at the Minnesota State University - Mankato to complete a Geographic Information System (GIS) terrain analysis for the watershed using recently completed LIDAR data in southern Minnesota. Analysis will concentrate on the impaired reaches of the Yellow Medicine River Watershed and its tributaries. This inventory will utilize the State of Minnesota LiDAR elevation datasets to create many datasets through the analysis of this elevation data.
