2019.02.04 CC Packet - Laserfiche WebLink

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2. LAND AND WATER RESOURCE INVENTORY 2.1. Topography and Geology The City of Hugo is 36 square miles in area and located in northern Washington County as shown in Figure 1, Appendix A. The City lies partially within the Glacial Lake Hugo Plain and St. Croix Moraine geomorphic areas. The St. Croix Moraine is the dominant geomorphic feature in Washington County and marks the last advance of the large ice sheet. The landscape is characterized by rolling hills, ridges, and depressions generally forming many lakes and wetlands. The Glacial Lake Hugo Plain consists of terrain that is gently rolling to flat. The surface geology consists primarily of fine sand and sandy silt glacial lake deposits and outwash. The Glacial Lake Hugo Plain can be found on the western half of Hugo. The water table within the City typically ranges from two to ten or more feet below the surface. The current RCWD Watershed Management Plan (WMP) provides a detailed description of the City's surficial and bedrock geology and aquifers. More information is available in the Washington County Geologic Atlas from the Minnesota Geological Survey and the Washington County Groundwater Plan. 2.2. Climate and Precipitation The climate within the Minneapolis/St. Paul metropolitan area is described as a humid continental climate with moderate precipitation, wide daily temperature variations, warm humid summers, and cold winters. The total average annual precipitation in this area is approximately 29 inches, of which approximately one-third occurs in the months of June, July, and August. The annual snowfall average is about 56 inches and is equivalent to approximately 5.6 inches of water. The 1-year rainfall event occurring over a 24-hour period produces approximately 2.42 inches. The 100-year rainfall event occurring over a 24-hour period produces approximately 7.15 inches. The 100-year, 10-day snowmelt runoff event is approximately 7.3 inches. This data was derived from the Atlas 14 report produced by the National Oceanic and Atmospheric Administration (NOAA). Additional climatological information for the area can be obtained from the State Climatologist website. • 1-year event = 99% chance of occurring each year • 100-year event = 1 % chance of occurring each year 2.3. Soils The City of Hugo consists mostly of Zimmermann, Isanti, and Lino soils. Lino and Isanti soils are poorly draining and result in higher runoff potential compared to Zimmerman soils. Additional information is available in the Washington County Soil Survey, which is available in the Hugo Water Resource Library. Figure 2, Appendix A shows the Hydrologic Soil type throughout the City. 2.4. Land Use The City of Hugo land use practices include residential, commercial, and industrial development, as well as designated park and open space areas and public recreational areas. The City's 2016 existing land uses are shown on Figure 3, Appendix A, and the City's Future Land Use Map is shown in Figure 4, Appendix A. The land uses as shown on Figure 3 and Figure 4 are defined as follows: • Agricultural: One unit per ten gross acres SECTION 2