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<br />City of Arden Hills <br />Planning Commission Meeting for April 3, 2019 <br />P:\Planning\Planning Cases\2019\19-003 Bethel Sci Addition - SP\Memos Reports <br /> <br />Page 4 of 8 <br />F. Drainage Wetlands and Flood Plain – Section 1325.05 Subd. 2 <br />The site plan includes a stormwater pollution prevention plan. The proposed addition will increase <br />impervious surface coverage from about 6,970 square feet to 11,200 square feet in the project area. <br />10,475 square feet of the new addition will require mitigation, as these changes are will increase <br />the amount of stormwater runoff. There is currently no stormwater management on the site. <br /> <br />The proposed stormwater management system for the project, a filtration basin as shown above, <br />will be located south of the project area, near the west parking lot. The filtration basin will greatly <br />improve stormwater management and capacity on site. To accommodate the improved basin <br />design, some of the existing volunteer trees and shrubs located in the existing basin will be <br />removed. One tree on the opposite side of the street will be removed as shown on the image below. <br />Plantings in the proposed basin includes native grasses and prairie seed mix. <br />