The City of Thief River Falls drinking water is taken from a 135 acre reservoir that is supplied by the Thief River and Red Lake River. Sedimentation and erosion have significant impacts to the waters in Pennington County. The reservoir is filling with sediment faster than expected. Buffers and side water inlets will help reduce sediment and improve water quality for these types of erosion. Buffers would also reduce nutrients polluting the waters in Pennington County and have a beneficial impact to the dissolved oxygen impairment on both the Red Lake and Thief River.
This project will complete an inventory of drainage systems to prioritize locations for structural erosion control practices and buffer strips that will reduce sediment loading into Marsh Creek and Lower Wild Rice River downstream, which are both impaired by turbidity. An inspection plan and database will also be developed to enhance the county drainage ditch inspection program.
The Prioritization, Targeting, and Measuring Water Quality Improvement Application (PTMA) connects the general qualitative strategies in a Total Maximum Daily Load (TMDL) and Watershed Restoration and Protection (WRAP) and the identification of implementable on-the-ground Best Management Practices (BMPs). Leveraging geospatial data from the International Water Institute this application will be developed for two pilot areas within the Red River Basin.
As part of the FY 2012 funding cycle, the Board of Water and Soil Resources granted funds for development of the Water Quality Decision Support Application (WQDSA). The WQDSA will provide land and water managers with geospatial data and online tools to prioritize, market, and implement actions on the landscape to achieve water quality objectives identified in local and state water plans and to ensure that public funding decisions are strategic and defensible.
This project builds on the successful implementation of previous work, installing 29 water and sediment control basins and 25 acres of vegetative filter strips within the priority Marsh Creek watershed to reduce sediment loading into the Wild Rice River, which is currently not meeting water quality standards for sediment.