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• • Isanti soils are poorly to very poorly drained, with a water table at plus 1 foot to 0.5 feet below the soil surface for the very poorly drained, depressional phase, and 0.5 to 1.5 feet below the soil surface for poorly drained phase at some time October through June in most years. Native vegetation of Isanti soils is typically comprised of grasses (Poaceae), sedges (Cyperaceae), willow (Salix spp.), Quaking Aspen (Populus tremuloides), and other species adapted to persistent wet conditions (i.e. hydrophytic plant species). Rifle mucks are very deep, very poorly drained soils formed in organic deposits more than 51 inches thick in bogs and depressional areas within ground moraines, end moraines, outwash plains, and lake plains. Rifle muck soils have moderately rapid permeability. Slopes range from 0 to 2 percent. Rifle mucks are very poorly drained, with the seasonal high water table ranging from 1 foot above the surface to 1 foot below the surface from November to June. Surface runoff and internal drainage is very slow; permeability is moderately rapid. Rifle muck soils are primarily in woodland or wet meadow. A few areas are used for pasture. Principal vegetation is tamarack, black spruce, paper birch, balsam fir, black ash, and northern white - cedar. Native ground cover is sphagnum moss, leather leaf, blueberry, and Labrador tea, with native and invasive grasses and sedges common in partially drained Rifle Muck wetland systems. Figure 2 depicts a schematic oblique view of a typical Isanti — Soderville soil complex in Anoka County, Minnesota. The complete official soils series descriptions (OSD's) for the soil types of The Preserve site are provided in Appendix B of this report (USDA NRCS, 2005). Furthermore, additional information on soils can be obtained from the United States Department of Agriculture's Soil Survey of Anoka County, Minnesota (USDA 1977). AN( A COUNTY. MINNfs"'OTA Figure 2. Typical Pattern of the Isanti-Soderville-Rifle Soil Association Soil Survey of Anoka County MN (USDA, 1917) The Preserve Conservation Development - Restoration and Management Plan 5