East Polk County has approximately 293,000 acres of cropland. 97% is considered to be eroding at a rate greater than "T", the allowable rate.
Priority Area I: A high percent of land in Critical Area I is susceptible to water erosion due to steep slopes or severe wind erosion caused by open, unprotected sandy soils. Soil loss is estimated to be anywhere from 7-18 tons per acre per year. Erosion is a serious problem in areas along the Clearwater River, Lost River, and the Sand Hill River where private and coutny ditches and tile enter.
Priority Area II: Wind and water erosion is not as critical due to moderate slopes and sandy soils are protected to some degree by wooded areas. Soil loss will range from 6-12 tons per acre per year.
Priority Area III: Nearly level soils composed of peat or till. Scattered areas have critical soil loss. Soil loss will usually be les than 5 tons per acre per year.
Please refer to the East Polk County Wind and Water Erosion Map provided below for priority areas.
Some common cost share practices include: Water and Sediment Control Basins, Side Water Inlets, Grade Stabilization Projects, Streambank and Shoreland Protection Projects, and Grassed Waterways.
East Polk SWCD
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Protecting water and natural resources