Agenda - Environmental Policy Board - 01/25/2021

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Riverstone SouthEAWDraft December 2020 b.Discuss the pro concentrating on implications for environmental effects. The project is compatible with surrounding land uses, which include residential, agricultural, and solar energy. The City of Ramsey2040 Comprehensive Plan guides the site for Low Density Residential (LDR, generally 3-4 lots/net acre). The net density of the site, after factoring out open space, is 3.97lots/acre. c.Identify measures incorporated into the proposed project to mitigate any potential incompatibility as discussed in Item 9b above. The project will require a Comprehensive Plan Amendment to guide thepart of the site planned for 40-foot-wide lots forMedium Density Residential (MDR, average of 7 units/acre). The project area will also fall under a rezoning amendment to allow 40-foot-wide lots. The project is designed to balance smaller lots with public open space. The project will include about 17.46 acres of open space consisting of tree preservation, stormwater basins, parks, and buffersstrips that will separate the project from adjacent residential and commercial areas.The proposed project is compatible with the proposed zoning, and the surrounding land uses. Land use conflicts are not anticipated. 10.Geology, Soils and Topography / Land Forms a.Geology -Describe the geology underlying the project area and identify andmap 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. The Geologic Atlas of AnokaCounty, Minnesota(Minnesota Geological Survey 2013) indicatesthe surficial geology of the area is characterized by terrace sand and gravel. The bedrock geology of the site falls in the Tunnel City Group and consists of fine-grained sandstone, siltstone, and shale. sdominantly quartz sandstone. Theestimated depth to bedrock in the project area, based on the Geologic Atlas,generally ranges between 100and200 feet. As indicated under Item 11.a.ii, the depth to bedrock innearby groundwater wells rangesfrom 95 to 180 feet and the depth to static groundwater rangesfrom 10 to 50 feet. Sinkholes and karst lands are not knownto occur in western AnokaCountywhere the project is located. Minnesota Karst Landsand Sinkhole Mapping prepared by Calvin Alexander and others (2006) does not showskarstlands or sinkholes in or near the project area. 8