Agenda - Council - 09/14/2021 - Laserfiche WebLink

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Trott Brook Crossing EAW August 2021 The project area does not fall in or near a wild and scenic river or an agricultural preserve, and is not within the Mississippi River Corridor Critical Areas (MRCCA). Floodplains The site includes floodplain on the southern portion adjacent to Trott Brook, MN DNR Public Waterway M-063-001.5 (Figure 6). The site falls in FEMA (Federal Emergency Management Agency) FIRM (Flood Insurance Rate Map) Panel 27003C0165E, which shows that the floodway elevation adjacent to Trott Brook, Flood Zone AE (1% annual chance flood), ranges from 871.4 feet at the upstream end of the site to 871.2 feet at the downstream end of the site. The project will avoid floodplain impacts and comply with Lower Rum River Watershed Management Organization (LRRWMO) Stormwater Standards that require lowest floor elevations to be at least 3 feet above the highest anticipated groundwater table and 2 feet above the 100-year flood elevation, or 1 foot above the emergency overflow of storm ponds, whichever is greater. Shorelands The Trott Brook Crossing development site includes shoreland on the southern portion (Figure 7). The shoreland overlay district extends 300 feet from the edge of the bank of the river channel of Trott Brook (MN DNR Public Waterway M-063-001.5), or to the landward extent of the floodplain, whichever is greater. The City of Ramsey ordinances specify that the minimum lot width within shoreland for the Trott Brook Crossing project is 80 feet, and that the lots within shoreland do not exceed 25% impervious surface. The project proponent will be designing with lot lines that do not extend into floodplain, wetlands or wetland buffers, but will be submitting a variance for impervious surface for lots on the southern portion of the project that exceed the 25% impervious threshold. b. Discuss the project's compatibility with nearby land uses, zoning, and plans listed in Item 9a above, concentrating on implications for environmental effects. The project is compatible with surrounding land uses, which include primarily residential and agricultural land. The Trott Brook Crossing project will comply with City R-1 zoning requirements. The net density of the site is 2.2 lots/acre, similar to the existing residential development adjacent to and south of the project. c. Identify measures incorporated into the proposed project to mitigate any potential incompatibility as discussed in Item 9b above. To minimize the affects of development on adjacent properties, the project proponent may include additional landscape plantings where it borders large lots in the western end of the project. 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 7