02-19-2002 Planning Packet - Laserfiche WebLink

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Conslruction of the building pad requires that the existing soils be removed and replaced with proper building material. The existing silty clay topsoil will be stockpiled and replaced atop a sand and gravel base. The stockpile will be on-site, but will be placed away from existing wetlands and will have proper erosion control. As required by the Minnehaha Creek Watershed District for Rule D an average 16.5 -foot buffer will be maintained along the unnamed drainage ditch. The location and widths of this buffer along with the site plans showing the grading limits are available in Appendix A. The initial grading and soils corrections have been completed as allowed by the MCWD and the USAGE. Project Justification The Minnesota Department of Transportation purchased the current fire station as a right-ofrway for the future realignment of TH 12. The fire station is considered to be an essential service and must be replaced prior to the start of TH 12 reconstruction in January 2003. The new fire station will jointly serve the communities of Long Lake, Medina, and Orono, Minnesota. Wetlands Wetland Delineation Mr. Deric Deuschle (SEH) delineated the wetlands in the western half of the property on December 5, 2001. The field delineation was done to identify and delineate any areas meeting the wetland cnteria in accordance with the Corps of Engineers Wetlands Delineation Manual (USAGE, 1987). Because the wetland delineation was conducted outside of the normal growing season, a more conservative boundary was determined. Staff from the Minnehaha Creek Watershed District (Jim Hafncr and Mike Wyatt), the Hennepin Conservation District, and the City or Orono reviewed and accepted the delineation on December 6, 2001. The delineated wetland boundary was surveyed with a Trimble ProXR® GPS system and converted into AutoCAD" format. The remaining wetlands on the eastern half of the property were delineated and surveyed using GPS on December 8, 2001. The wetland delineation completed for the eastern halt of the property has not yet been reviewed or approved, but was detennined under similar conditions as the portion of the property that w as reviewed. Topographic maps (Figure 3), the National Wetlands Inventory (NWI) map (Figure 4), the Soil Survey for Hennepin County (Figure 5). the hydric soil list for Hennepin County, the Minnesota Department of Natural Resources (MND.NR) Protected Waters Inventory (PWI) map (Figure 6), and aerial photographs (Figure 7) were reviewed to locate potential wetland habitats prior to the field visit. Minnehaha Creek Watershed DistrKt Permit Application City of Orono, Minnesota A-LONGL0204 00 Page 3