Agenda - Council - 04/13/2021 - Laserfiche WebLink

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Record of Decision — Riverstone South Environmental Assessment Worksheet Corridor Critical Area (MRCCA). The entire property is setback about 666 feet from the Mississippi River. Decision Regarding the Potential for Significant Environmental Effects Minnesota Rules 4410.1700, Subp. 7 lists four criteria that shall be considered in deciding whether a project has the potential for significant environmental effects. Those criteria and the City's findings are presented below. A. Type, Extent, and Reversibility of Environmental Effects Minnesota Rules 4410.1700 Subp. 7 (A) indicates the first factor that the City must consider is the "type, extent, and reversibility of environmental effects." The City's findings are set forth below. 1. Cover Types. The project will convert about 54.14 acres of cropland and 16.17 acres of woodland to streets, homes, lawns, landscaping, and stormwater features. The balance of the site will include about 7.73 acres of tree preservation and about 0.59 acre of grassland preservation. 2. Shorelands and Floodplains. The project area is located outside the shoreland overlay district and the floodplain of the Mississippi River. 3. Land Use. The proposed project is compatible with surrounding land uses and the M osed zoning. The project will require a Comprehensive Plan Amendment to guide the pa of the site planned for 40-foot-wide lots for Medium Density Residential (MDR). The project also requires a Zoning Amendment because part of the project is not consistent with the existing Low Density Residential zoning. The part of the project area in the Mississippi River Corridor Critical Area (MCCA) includes about 7.73 acres of tree preservation and additional open space allocated to stormwater management. 4. Geology and Soils. Residential development grading is expected to affect about 68 acres of land and involve movement of about 350,000 cubic yards of soil to construct streets, residential building pads, and stormwater features. 5. Water Quality. Compliance with multiple stormwater requirements will minimize and mitigate potential adverse effects on receiving waters. Project construction will add about 25.62 acres of impervious surface to the site, consisting of streets, homes, and driveways. Stormwater rate and volume controls will limit increases in runoff volume and associated pollutant transport. Stormwater and infiltration basins are expected to mitigate potential adverse effects on water quality. 6. Wetlands and Surface Waters. The project area does not include any surface waters, wetlands, streams, or channels. The site has sandy soils and drains overland toward the Mississippi River. Much of the runoff infiltrates into the soil. 7. Wastewater. The project is expected to produce normal domestic wastewater that will be typical of residential developments. The proposed project does not raise wastewater conveyance or treatment capacity concerns. 8. Hazardous Materials. About 70% of the project area has been in agricultural use since at least the 1930s and the remaining 30% is woodland and grassland. The site is not known to include 7