09/22/2003 Council Packet - Laserfiche WebLink

Home Search

dominated by Box Elder (Acer negundo), Elm (Ulmus americana), Buckthorn (Rhamnus carthartica) and Hackberry (Celtis occidentalis). Focused searches were conducted in isolated depressions for suitable habitat for such species as Lanced - Leaved Violet (Viola lanceolata), Autumn Fimbristylis (Fimbristylis autumnalis), Tubercled Rein - Orchid (Platanthera flava), Marginated Rush (Juncus marginatus), Clinton's Bulrush (Scripus clintonii; State Special Concern), and Cross Leaved Milkwort (Polygala cruciata; State Endangered). No rare species were found within the limited suitable habitat. Based on the findings of July 17th, 2003 field survey of the proposed project area and the absence of state - listed plant populations on the site, it was concluded that no rare plant populations would be directly impacted by the proposed development activities on- site. Wetland Impacts The proposed plan will not require the alteration of the wetlands on the site. In the event future development does encroach upon on -site wetlands, under the Minnesota Wetland Conservation Act (WCA) the Rice Creek Watershed District (RCWD) acts as the LGU for wetland impacts. The RCWD will assume wetland alteration permit authority over any wetland impacts. Anoka County Ditch No. 10 will be preserved in its existing condition, to the extent possible. Water Related Land Use (Shoreland and Floodplain Impacts) The very eastern portion of the site is located within the designated shoreland zoning district for Marshan Lake. The City has adopted a shoreland and a floodplain ordinance that regulates development within these designated areas. The DNR has approved these ordinances. The proposed development will be in compliance with the standards of these ordinances. Outlots A and B lie partially within the shoreland buffer for Marshan Lake and will be limited to a maximum impervious surface area of 60 %, in accordance with the City's shoreland ordinance. There are no floodplain impacts associated with the proposed project. Water Quality Impacts The creation of new detention facilities will address the increased quantities of runoff resulting from increases in impervious surfaces. Surface water runoff will first be conveyed by new storm sewer and then discharged into storm water ponds prior to discharge into receiving water bodies. Storm water ponds will provide for rate control as