Two large, actively eroding gullies located a few miles apart in Amador Township are contributing tremendous loads of phosphorus and sediment to the St. Croix River. One gully (Gully A) includes a major agricultural gully, severe road erosion, and sediment deposits of a foot or more thick in a state park. The second gully (Gully B) is over 4 feet deep, adjacent to a road, and is an annual problem. Stabilizing these two gullies will greatly reduce the sediment and phosphorus loading to the St. Croix River, which will help meet the reduction goal of the Lake St.
Using a previous escarpment gully project as a model, the Chisago Soil and Water Conservation District will complete a similar inventory of actively eroding gullies along the Lower Sunrise River from the Kost Dam south to the confluence with the St. Croix, which includes the North Branch of the Sunrise, Hay Creek, and the Sunrise River main branch. There are major erosion issues along this stretch of river, no organized and efficient way to begin work in the area. The inventory report will provide the missing link.
The Chisago Soil and Water Conservation District has been successful in implementing Best Management Practices in certain targeted locations within the county, including the prioritized and assessed areas of Chisago City, Lindstrom, and Center City. However, there are many areas that want to implement conservation projects but aren't within targeted areas. This award will empower community partners, especially lake associations, to award grants for rain gardens, shoreline buffers, and other worthwhile projects to improve water quality.
The Chisago Soil and Water Conservation District (SWCD) has had such great success implementing gully stabilization projects along the St. Croix River escarpment that all of the current grant funding has been encumbered towards projects. Two large gully projects, one in the City of Taylors Falls and a second nearby in Interstate State Park, are lined up and ready to go as soon as funding is secured. Both of these gullies are large and have been actively eroding for many years, depositing large loads of sediment and phosphorus directly into the St. Croix River.
These funds are being used to systematically collect data and produce statistically valid estimates of the rate of soil erosion and tracking the adoption of high residue cropping systems in in the 67 counties with greater than 30% land in agricultural row crop production. Designed to establish a long term program in Minnesota to collect data and produce county, watershed, and state wide estimates of soil erosion caused by water and wind along with tracking adoption of conservation measures to address erosion.
Goose, East and West Rush Lakes are not meeting state water quality standards due to excessive phosphorus. These are three of the worst lakes in Chisago County in terms of water quality, yet also some of the most heavily used lakes for recreation. The quality of the water in the St. Croix River is directly influenced by the poor quality water leaving East Rush, West Rush, and Goose Lakes.
These funds are being used to systematically collect data and produce statistically valid estimates of the rate of soil erosion and tracking the adoption of high residue cropping systems in counties with greater than 30% land in agricultural row crop production. Designed to establish a long term program in Minnesota to collect data and produce county, watershed, and state wide estimates of soil erosion caused by water and wind along with tracking adoption of conservation measures to address erosion.
The Chisago Lakes Chain of Lakes watershed in southern Chisago County is made up of 18 lakes and outlets to the St. Croix River through the Sunrise River. The top 20 urban and rural projects around North and South Center Lakes that are identified in the Rural Subwatershed Assessment and Urban Stormwater Retrofit Analysis reports will be the top priority of this application. The goal is a phosphorus reduction of 100 pounds (4%) to North and South Center Lakes.
The Mallery Jerseys dairy farm is critically located along the bluff of the St. Croix River escarpment and drains directly to the St. Croix River. In 2018, a Comprehensive Nutrient Management Plan was completed and identified a number of additional practices that should be implemented to improve the water quality of the St. Croix River. The proposed practices will reduce the phosphorus and nitrogen by 76 pounds (83%)and 265 pounds (85%) respectively.
A large, actively eroding gully has existed on the campus of Parmly, a senior living complex in Chisago City, for at least 50 years. The gully is on the banks of Green Lake, which is at high risk for becoming impaired in the near future. The Parmly gully project is identified as a source of untreated stormwater and phosphorus loading in the Chisago City urban subwatershed retrofit analysis report. Stabilization of the gully will provide a 20% reduction in phosphorus loading to Green Lake. The staff of Parmly is in full support of the project and a design is complete.
The St. Croix River escarpment has been a focal point for the Chisago Soil and Water Conservation District over the past 8 years, and continues to be one of the leading areas of Chisago County in terms of phosphorus reduction projects to Lake St. Croix. Of the original inventory, 16 of the 36 gullies have been stabilized. This application includes the stabilization of 5 gullies. These projects will reduce the phosphorus loading to the St. Croix River by at least 50 pounds per year and sediment loading by at least 50 tons per year.