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.
This feasibility study will produce strategies for wetland restoration and ditch hydrology changes to reduce the amount of phosphorus and solids that drain into Typo and Martin Lakes, the Sunrise River and St. Croix River. Total Maximum Daily Loads and other plans have identified this area as key for pollutant reduction, and the study will determine scope and effects of potential projects, allowing the district to prioritize those that will have the great impact on water quality.
This project will install nearly 800 linear feet of restored lakeshore with an emphasis on bioengineering techniques, native plants and locating buffers/swales at points of concentrated overland flow into Green Lake. By targeting properties that are eroding and/or with concentrated overland flow to the lake we will reduce suspended solids discharge by 16,697 lbs/yr and phosphorus by 1.3 lbs/yr.