#3057 Wetland Delineation - Laserfiche WebLink

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Wetland boundaries were marked at the site by blaze-orange "wetland boundary" flagging attached to 4-foot wooden lath. Where vegetation was dense, to assist in locating the flagged lath (wetland edge), a second piece of flagging was attached to a nearby tree or shrub branch. The "wetland boundary" is considered to be the topographically highest extent of the wetland basin; areas below the staked boundary met the three required wetland criteria while areas above were lacking in one or more of these criteria Wetland classification followed methods described by Cowardin et al. ( 1979) and used in the NWI (e.g. PEMB, PSS 1 C, etc.), completed by the U.S. Fish and Wildlife Service. The Circular 39 classification (Shaw and Fredine 1956) is also given (e.g. Type 1, Type 2 ... etc.). The indicator status of plants, as described in Appendix B, was determined using the National List of Plant Species That Occur in Wetlands -Region 3 (Sabine 1999). RESULTS AND DISCUSSION Background Information-(Office-Based Investigation) The NWI map (Excelsior Quadrangle) illustrates one wetland basin and one lacustrine (lake) basin on the subject parcel (Figure 2). The wetland is described as a palustrine (P) type wetland exhibiting emergent vegetation (EM) and semipermanently flooded hydro logic regime (F), or a Type 3 PEMF wetland on the NWI map. The lake is described as lacustrine (L) of the lirnnetic subsystem (1) exhibiting an unconsolidated bottom (UB) and a permanently flooded hydrologic regime (H) or a LlUBH lake on the NWI map. The Soil Survey of Hennepin County, Figure 3, indicates three soil series present on the subject property. These soil series are: Hayden loam, lake beaches, sandy, and marsh (see figure 3). Marsh is classified as a hydric soil (SCS Hydric Soils of the United States), illustrated with blue crosshatching on Figure 3. Soil series descriptions are given in Appendix C. Minnesota Department of Natural Resources, State·Protected Waters Map, indicates a protected water body (133P) within the subject parcel (Figure 4). Site Visit SER personnel examined the subject property for areas meeting jurisdictional wetland criteria during the site visit. One basin meeting the jurisdictional criteria of a wetland, for which a boundary was determined, was delineated. Detailed soils, vegetation, and hydrology data for the delineated wetlands are provided in the data sheets of Appendix A. Basin 1 Upon completion of the wetland delineation it has been determined that Basin 1 is a Type 3, palustrine (P) type wetland exhibiting emergent vegetation (EM), and a semipermanently flooded hydrologic regime (F), or a PEMF wetland, located within the eastern portion of the property (See Figure 5). Vegetation at the wetland sample point was dominated by lake bank sedge (Carex lacustris, OBL) and box elder (Acer negundo, FACW-). Non-dominant plant species at the wetland sample point included wood nettle (Laportea canadensis, F ACW), narrow-leaved cattail (Typha angustifolia, OBL), water smartweed (Polygonum amphibium, OBL), and common buckthom (Rhamnus ,. t -~"'~