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Adelaide Landing Residential Development EAW, Hugo January 31, 2017 The proposed project is compatible with existing land uses and planned land uses in the area because it offers single-family and detached townhomes and densities next to the potential Rush Line Transitway corridor, consistent with implementation of the 2010 Hugo Comprehensive Land Use Plan. Further, connections to this property have been made with existing adjacent development. Portions of the project are also planned as public open space to include active and passive park consistent with the 2030 Parks System Plan adopted as part of the 2010 Parks, Trails and Open Space Plan. c. Identify measures incorporated into the proposed project to mitigate any potential incompatibility as discussed in Item 9b above. Incompatibility of land uses is not anticipated as discussed in Section 9b. 10. Geology, soils and topography/land forms: a. Geology - Describe the geology underlying the project area and identify and map any susceptible geologic features such as sinkholes, shallow limestone formations, unconfined/shallow aquifers, or karst conditions. Discuss any limitations of these features for the project and any effects the project could have on these features. Identify any project designs or mitigation measures to address effects to geologic features. Topographic mapping indicates that elevations on the site range from approximately 926 to 940 feet above mean sea level. The highest elevations occur along the western perimeter, northwest corner, and southern section of the site. The lowest elevations occur in the southeast corner and through the center of the site. According to the Washington County Atlas C-6, Plate 5, the groundwater table elevation within the site is around 925 feet. Groundwater elevations fluctuate from season to season and year to year. Groundwater elevations observed within the geotechnical boreholes during drilling operations at 20 different locations across the site ranged from 6 to 10 feet below grade. Piezometer readings collected at six locations on the site from March 24, 2016 to January 26, 2017 indicate that the average depth to water at these locations was approximately 3 feet below grade during that period (elevations of around 927 to 930). During dryer months, groundwater elevations were observed in the 6-7 foot depth range at a couple of the piezometer locations. Depth to bedrock was estimated from The Geologic Atlas of Washington County, Minnesota C-39, Plate 6, Depth to Bedrock map (2016). The Geologic Atlas indicates that the distance from the land surface to bedrock ranges between approximately 51 to 100 feet. The Geologic Atlas of Washington County, Minnesota Data -Base maps (C-5, Plate 1 (1990) and C- 39, Plate 1 (2016)) and associated GIS data indicate there are no known sinkholes, exposed bedrock, springs, or seeps on or near the site. In addition, no kart areas are mapped within or near the site based on Minnesota Karst Lands Mapping (Alexander 2002) and MN DNR Minnesota Regions Prone to Surface Karst Feature Development GIS data (2015). If such features are encountered on the site during planned subsurface investigations, actions will be taken to mitigate potential effects such as stormwater routing, soil stabilization, and groundwater protection practices. The Geologic Atlas of Washington County, Minnesota, C-5, Plate 6, Sensitivity of Groundwater Systems to Pollution map (1990) indicates that the sensitivity of groundwater to pollution in the project areas is generally high (H) to very high (VH). Mapping also indicated that sensitivity of the 10