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Adelaide Landing Residential Development EAW, Hugo January 31, 2017 <br />Table 10.1. Soils Classification <br />Map <br />Hydric' <br />Hydric' <br />Prime <br />Symbol <br />Soil Classification <br />Percent of <br />Category <br />Farmland <br />Map Unit <br />161 <br />Isanti loamy fine sand, <br />92 <br />Predominantly <br />Not Prime <br />depressional <br />hydric <br />Farmland <br />158B <br />Zimmerman fine sand, 1-6% <br />2 <br />Predominantly <br />Farmland of <br />Statewide <br />slopes <br />non-hydric <br />Importance <br />Predominantly <br />Farmland of <br />265 <br />Soderville loamy fine sand <br />3 <br />non-hydric <br />Statewide <br />Importance <br />Predominantly <br />Farmland of <br />162 <br />Lino loamy fine sand <br />5 <br />non-hydric <br />Statewide <br />Importance <br />'Based on the NRCS List of Hydric Soils of Minnesota (2010). <br />2 Based on the USDA/NRCS Prime Farmland of Washington County, Minnesota (USDA NRCS <br />WebSoils, accessed 2016). <br />The USDA NRCS Web Soil Survey (accessed August, 2016) indicates soils within the subject <br />property are categorized into Wind Erodibility Groups 1 and 2; indicating soils within the Project are <br />highly erodible by wind. Soil units identified within the site are rated as having K values between <br />0.02-0.32, meaning that susceptibility of a soil to sheet and rill erosion by water is moderate to low <br />under ordinary climatic conditions. Soil classification slope percentages range from 0-6 percent. <br />Due to erodibility ratings of soils within the Project, proper use and installation of soil stabilizing <br />BMP's during and after construction activity will be important to reduce soil loss and erosion on site. <br />It is anticipated that construction will entail moving approximately 1,100,000 yards of soil, and <br />approximately 154 acres of 217.5 acres will be graded for streets, house pads, and stormwater <br />features. Because the project will involve disturbance of more than one acre of land, application for <br />coverage under the National Pollutant Discharge Elimination System/State Disposal System <br />(NPDES/SDS) General Permit will be submitted to the MPCA prior to initiating earthwork on the <br />site. This permit is required for discharge of stormwater during construction activity and requires <br />that Best Management Practices (BMPs) be implemented. Erosion and sedimentation control BMPs <br />related to stormwater runoff are discussed in greater detail within Item I I .b.ii. <br />NOTE: For silica sand projects, the EAW must include a hydrogeologic investigation assessing the <br />potential groundwater and surface water effects and geologic conditions that could create an increased <br />risk of potentially significant effects on groundwater and surface water. Descriptions of water <br />resources and potential effects from the project in EAW Item 11 must be consistent with the geology, <br />soils and topography/land forms and potential effects described in EAW Item 10. <br />12 <br />