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Zoning File #1962 <br />September 15, 1994 <br />Page 2 <br />O - Spillway Sketch <br />P - Excerpts from Engineering Calculations <br />Q - Outlet Stricture Detail <br />R - Soil B<iring Excerpts <br />S - Letter from Minnehaha Creek Watershed District <br />T - Letter from DNR <br />U - Letter from City Engineer <br />V - Septic Diagram, 825 Old Long Lake Road <br />W - Excerpts, 1974 Orono Surface Water Management Plan <br />About the Existing Wetland <br />• This wetland was delineated in the City’s 1974 wetland inventory mapping. <br />However, because it appears on the USGS map (Exhibit M) staff would argue that <br />it is protected under Section 10.55, Subd. 5(A). <br />• Mapped as "wooded marsh” on USGS topographic maps. <br />• Mapped as "PFO 1C (Palustrine forested broadleafed deciduous seasonally flooded <br />wetland) on the National Wetlands Inventory maps. <br />• PI O 1C is typical of a Type 7 wooded swamp w'etland type. <br />• Area of this wetland is approximately 10-12 acres. <br />• Applicaiu’s soil borings indicate the wetland contains peat and muck ranging to a <br />depth of 30'. <br />• The wetland is in mid watershed of a series of connected wetlands lying generally <br />north of the Luce Line, cast of Highway 12, west of RuAnn Road, and lies both <br />north and south of Old Long Lake Road. A small portion of the Linda Wood area <br />of Long Lake also drains into this wetland. <br />• Orono’s 1974 Surface Water Management Plan inventories this subwatershed as <br />"LLI2" with a total subwatershed area of 185 acres. The subwatershed contains <br />approximately 94% of the required stormwater quantity storage. Of greater concern <br />is the fact that the portion of watershed upstream from Day ton’s driveway (LL12A) <br />contains only 77% of the pho.phorus assimilative capacity required based on the <br />calculated pollution potential (more on this below).