Laserfiche WebLink
BACKGROUND & METHODOLOGY WETLAND INVESTIGATION SIXTH AVENUE PROPERTIES <br />ORONO, MN <br />May 24, 2024 P a g e 4 BACKGROUND As requested by Aspect Design Build, Anderson Engineering of Minnesota, LLC completed a wetland investigation Hennepin County parcels 2911823430002, 2911823430011, 2911823440004, and 2911823440006 near 3465 and 3515 Sixth Avenue North located in Orono, Minnesota (Appendix A, Figure 1). This project area is in Section 29, Township 118 North, Range 23 West. The wetland delineation was completed in accordance with the 1987 United States Army Corps of Engineers Wetland Delineation Manual and the published regional supplement to the Army Corps Wetland Delineation Manual, Midwest Regional Supplement. The purpose of this study was to identify areas meeting the technical criteria for wetlands, delineate the jurisdictional extent of the wetland basins, and classify the wetland habitats in the project area. Fieldwork for this site investigation was completed by Dylan Kruzel and Robert Bergstrom on April 18, 2024. The weather was partly sunny and 49 degrees Fahrenheit. METHODOLOGY U.S. Geologic Service 7.5” Topographic Quadrangle maps, U.S. Fish and Wildlife Service National Wetland Inventory (NWI) maps, Minnesota Department of Natural Resources Public Water Inventory (PWI) maps, U.S. Department of Agriculture Natural Resources Conservation Service Soil Survey, and available aerial photographs were consulted to initially locate potential wetland habitats. Routine On-site Determination Method was used during this investigation. In this method, the following procedures were used: 1. The vegetative community was sampled in all present strata to determine whether it met hydrophytic vegetation criteria based on the indicators identified in the Midwest Regional Supplement. 2. Soil pits were dug using a Dutch auger to depths of twenty-four to forty-two inches. The soil profile was noted in addition to any hydric soil characteristics. 3. Signs of wetland hydrology were noted and compared to field criteria such as depth to shallow water table and depth of soil saturation found in the soil pits. Data from sample points were recorded on Army Corps of Engineers Midwest Region Wetland Determination Data Forms (Appendix B). At least one sample point transect crosses the delineated wetland edge. This transect consists of an upland sample point and a wetland sample point. Other sample points may be in areas which have one or more other wetland criteria present; where questionable conditions exist; or to verify the absence of wetland criteria. Photographs of each resource are included in the resource review summary pages. Sample points were marked in the field with orange flags. The identified aquatic resource was marked with sequentially numbered pink flags. All sample points and the delineated aquatic resource extent were located using a Trimble Geo XH sub-meter GPS unit. MN ROUTINE ASSESSMENT METHOD Delineated resources were evaluated using Board of Soil and Water Resource’s Minnesota Routine Assessment Method version 3.2 (MnRAM). Information from desktop and field assessment was evaluated in the system and a management classification ranging from exceptional quality to low quality is output as Preserve, Manage 1, Manage 2, and Manage 3. Resulting classifications are typically utilized in development planning. 264