07-06-2020 Council Work Session Packet

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6 The road-of-way vacation will be presented to the City Council by the City Engineer as a separate staff report and action item. Grading Plan and Stormwater Management Per the Stormwater Management Plan prepared by Barr Engineering dated May 2020, two (2) stormwater ponds will provide rate control and water quality treatment for the site. Currently, per Figure 1, Existing Drainage Plan, there are 3 existing stormwater ponds and wetlands on site. Based on the high water table and soils with low permeability, infiltration is not possible on this site. The applicant has submitted an application to RCWD for review and approval. A separate public drainage and utility easement extending 10 feet from the high water level (HWL) shall be recorded over the stormwater ponds. Public Utilities The existing building is served by an 8” municipal watermain and an 8” municipal sanitary sewer located along CSAH 14 (Main Street). The new building will be connected to the municipal services as well. The watermain will extend along the south and east side of the building to provide fire protection. Tree Preservation and Mitigation Standards The Environmental Coordinator and Environmental Board reviewed the tree preservation and landscaping plans. Per the May 27, 2020 Environmental Board staff report: The purpose of these standards is to protect valuable trees and stands of vegetation while not interfering with landowners’ reasonable use and development of property. The goal is to minimize unnecessary loss of habitat, biodiversity, and forest resources and to replace removed trees in areas where tree cover is most critical. There are 124 trees slated for removal. 112 new trees are proposed. Clarification will have to be provided on numbers of trees in basic use areas, which will not require mitigation, and trees that will have to be mitigated for. Open Areas Landscape Standards The purpose of these standards is to provide general site beautification and high aesthetic quality with a mix of plant materials in open areas. Open area landscape standards call for 1 large tree and 3 large shrubs per 2000 sq.ft. There is 70,293 sq. ft. of open space that requires 36 large trees and 106 large shrubs. 102 large trees, 11 medium trees, 61 large shrubs, and 68 medium shrubs have been provided. Open areas landscape standards have been met.