It is critical to train new staff, create modeling protocols for new BMPs, refine and calibrate models, and test ever-advancing modeling applications. The Metro Conservation District?s (MCD) Sub-Watershed Analysis (SWA) program provides these capacity-building services and unites efforts across 11 SWCDs. MCD proposes to analyze an additional 15 subwatersheds. The analyses will identify the location and estimated cost/benefit relationship for BMPs, evolve with new technology, and share discoveries metro-wide.
Through a long standing partnership, this project will continue to implement a process formalized with a 2010 Clean Water Fund Grant to conduct stormwater sub-watershed assessments. The goal of the sub-watershed assessments is to accelerate water quality improvements by focusing efforts in high priority areas. Specifically, subwatershed assessments are a tool used to identify the most effective urban stormwater conservation practice by location.
The Cannon River Watershed includes approximately 941,000 acres of primarily agricultural landscape. Because of its large size, four subwatershed lobes are often referenced: Straight River Watershed, Upper Cannon River Watershed, Middle Cannon River Watershed, and the Lower Cannon River Watershed. Rice County is proposing utilizing LiDAR topographic data to determine areas of highest importance for Best Management Practice (BMP) Implementation for sediment within the Middle and Lower Cannon subwatersheds.
Through this project, the North Cannon River Watershed Management Organization (NCRWMO) works cooperatively with the Dakota Soil and Water Conservation District (DSWCD) and landowners to establish best management practices (BMPs) that reduce runoff and decrease the movement of sediment, nutrients, and pollutants into the Cannon River and its tributaries including, Trout Brook, Chub Creek, and Pine Creek.
The Vermillion River Watershed Joint Powers Organization (VRWJPO), in partnership with the City of Lakeville and Dakota County, are working to systematically address Total Suspended Solids (TSS) sources contributing to the North Creek tributary of the Vermillion River (North Creek) through use of a prioritized, targeted, and measurable subwatershed assessment approach to identify and implement the most cost- effective and feasible projects to address North Creek's TSS, fish, and macroinvertebrate impairments.
In 2002, Farquar and Long Lakes were placed on the impaired waters list due to high phosphorus levels that caused algal blooms and reduced water clarity. The City of Apple Valley is proposing a combination of two enhancements to achieve a 61 pound reduction in phosphorus.
Water from an area in and near the interchange of US Highway 52 and MN Highway 55 spills onto a steep bluff face at the head of a ravine. This has accelerated the amount of sediment eroding from the ravine into the Mississippi River. In partnership with Dakota County, Dakota Soil and Water Conservation District, the City of Rosemount, Minnesota Department of Transportation, Flint Hills Resources, the Vermillion River Watershed Joint Powers Organization has been working for several years to identify a solution to this severe erosion problem.
Schwanz Lake is an 11.5-acre shallow lake in southeast Eagan that was found to be impaired in 2006 due to excessive levels of phosphorus. The land area draining to the lake is 762 acres, but a small a 28-acre residential neighborhood was found to disproportionately contribute 24 percent (roughly 14 lbs/yr) of the phosphorus, according to a 2010 study of phosphorus sources. The neighborhood was developed before Eagan established water quality requirements for stormwater retention ponds and the neighborhood drains runoff directly to the lake through a single pipe.
Over the past two years, Dakota County has learned that many properties within the city do not have septic system records identifying the presence or condition of their septic system, and anecdotal evidence that some are failing. The County will use CWF Accelerated Implementation Grant dollars to inventory and inspect all septic systems within the City of Randolph. As part of the inspection, a well inventory will also be conducted. Based on a preliminary assessment, there are 105 properties that will require inspection.
The lack of sewage treatment in many small communities in Southeast Minnesota is causing surface water and groundwater pollution. Ten of these small communities will be the target of the technical assistance provided by this project. These communities have community or individual straight pipes which are discharging raw sewage directly into the environment, surfacing sewage, or have sewage contaminating groundwater.
The lack of sewage treatment in many small communities in Southeast Minnesota is causing surface water and groundwater pollution. Fourteen of these small communities will receive technical assistance provided by this project. These communities have community or individual straight pipes which are discharging raw sewage directly to the environment, surfacing sewage, or have sewage contaminating groundwater.
Through the Stormwater Retrofit Partnership, the Dakota Soil and Water Conservation District (DSWCD) provides the funding and technical assistance to prioritize and install Best Management Practices (BMPs) at existing public facilities. This project is needed because, like other urban properties that developed before stormwater regulations, most government owned facilities were designed and constructed without optimal water quality features.
This project will continues the successful 2010 Stormwater Retrofit Partnership. This resulted in the retrofit of 18 sites including eleven bioretention cells and seven snowmelt management areas. These retrofits provided treatment for 28 acres of urban drainage area - reducing total suspended solids, total phosphorus and stormwater volumes.
Thompson Lake is a shallow lake located in the City of West St. Paul, within the Lower Mississippi River Watershed Management Organization (LMRWMO). The 7-acre lake receives runoff from a 175-acre urban watershed that was developed in the 1950's and currently provides very little stormwater treatment. The eastern shoreline is within Thompson County Park, which features a fishing pier, event center, and miles of regionally connected trails. The west shoreline of the lake abuts the St. Croix Lutheran School.
This project will improve surface water quality within the sediment degraded Trout Brook, a designated trout stream and tributary to the Cannon River. The project will focus on the installation of best management practices that will reduce the amount of sediment transport within the watershed. Approximately 20 practices will be installed through this project which will reduce an estimated 2,000 tons of sediment per year.
The purpose of this project is to complete subwatershed analysis for Cannon River and Vermillion River sub-watersheds to prioritize and target Best Management Practices based on cost-effectiveness with regard to pollutant reduction. This process is intended to proactively assist local water management and partner agencies in maximizing the value of each dollar spent to improve water quality in the respective rivers.
The Vermillion River Watershed Joint Powers Organization (VRWJPO), in partnership with the City of Farmington and Dakota County, are working to systematically address Total Suspended Solids (TSS) sources contributing to the Vermillion River through use of a prioritized, targeted, and measurable sub watershed assessment approach to identify and implement the most cost-effective and feasible projects to address the Vermillion River's TSS, fish, and macroinvertebrate TMDLs.
The Vermillion River Watershed Joint Powers Organization (VRWJPO), in partnership with the City of Hastings and Dakota County, are working to systematically address Total Suspended Solids (TSS) sources contributing to the Vermillion River through use of a prioritized, targeted, and measurable subwatershed assessment approach to identify and implement the most cost- effective and feasible projects to address the Vermillion River's turbidity impairments and TMDL's.
