2021-040 Council Resolution - Laserfiche WebLink

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Per the Storm Water Management Plan prepared by Pioneer Engineering revised April 23, 2021, the existing topography can be divided into 3 portions. The northern section of the property is generally flat agricultural land used for row crops. This area drains to the northeast to an existing wetland area which then flows to the north. The southern portion of the property is made up of primarily flat agricultural land that is used for row crops. This area drains to a large wetland toward the center which outlets at the southwest corner through a culvert under CSAH 14. The last portion of the property is a small portion on the east side of the property that drains to the existing storm sewer on Otter Lake Road. The parking lot runoff for this commercial development will be collected in a storm sewer system which will connect to the proposed private road to the north. This storm sewer will be routed to the west where a basin with connected filtration cell will be constructed to abut the existing wetland. This basin will outlet to the existing Wetland A. This wetland will outlet through the culvert located at the southwest, which drains under CSAH 14. The original stormwater basin was designed to treat only runoff from Lot 1 and the private road. The stormwater management facility has been redesigned and enlarged as a NURP pond with filtration area to accommodate more runoff for future development. The City Engineer and RCWD have reviewed the facility and determined it is compliant for rate control, water quality and volume control. The stormwater management facilities (stormwater pond and storm sewer pipes) will be owned. and maintained by the developer and covered by a Declaration for Maintenance of Stormwater Facilities. Public Utilities The new retail building will be municipally served by an 8" PVC sanitary sewer and an 8" DIP watermain located along the private road that extends from Otter Lake Road. The utilities will be owned and maintained by the City. Tree Pi°eservation and Mitigation Standards The following Tree Preservation and Landscaping comments are from the July 29, 2020 Environmental Board staff report and May 3, 2021 Environmental Coordinator letter. A tree survey will not be required for this site, because there are no trees over 6 inch DBH to survey. Preservation and mitigation standards do not apply to this site. Open Areas Landscape Standards Open space plantings associated with the stormwater pond and infiltration basin will be addressed by future developments' planting requirements. Buffer and Screen Standards