Over the past 10 years, the Chisago SWCD has invested heavily in the Chisago Lakes Chain of Lakes watershed. In 2020, the fruits of that investment paid off when North and South Center Lakes, formerly impaired for excess nutrients, were de-listed from the MN Impaired Waters List. The other 16 lakes within the watershed are showing improving trends in Total Phosphorus (TP) and Chlorophyll-a concentrations and increasing clarity of the water.
The St. Croix River escarpment has been a focal point for the Chisago SWCD for over 11 years with a multi-phase targeted plan to reduce Total Phosphorus (TP) and sediment loading to the St. Croix River and Lake St. Croix. The Lower St. Croix River Comprehensive Watershed Management Plan (LSC CWMP) prioritizes the continuation of improving trends of TP and sediment to the St. Croix River and Lake St. Croix. In 2011, the SWCD received a Clean Water Fund (CWF) to complete an assessment of erosion along the St. Croix River escarpment.
According to the Minnesota Department of Agriculture's (MDAs) Final Township Testing Nitrate Report for Benton County, significant portions of Langola, Watab, Minden, and Maywood townships have high aquifer vulnerability ratings due to the geologic setting in Benton County. The purpose of this project is to reduce the risk of groundwater contamination in critical drinking water areas in Benton County through the process of sealing unused wells.
The Lower St. Croix (LSC) Partnership will implement projects and practices in order to achieve a cumulative phosphorus reduction of 381 lb/yr to priority waterbodies identified in Table 5-2 and Table 5-3 of the LSC Comprehensive Watershed Management Plan (CWMP). It will also implement practices in order to protect groundwater, particularly in areas identified in CWMP Figure 5-1 Vulnerable Groundwater in Agricultural Areas. Projects and practices will include structural agricultural BMPs, structural urban BMPs, non-structural ag and urban BMPs, and wetland restorations.
