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City of Arden Hills Planning Commission Meeting for October 7th, 2020 P:\Planning\Planning Cases\2020\20-017 3493 Siems Court - Var\PC Packets Page 3 of 10 feet from the Ordinary High Water Level (OHWL). Minnesota Statutes 103G.005 Subd. 14 defines the OHWL as: “…the elevation delineating the highest water level that has been maintained for a sufficient period of time to leave evidence upon the landscape, commonly the point where the natural vegetation changes from predominantly aquatic to predominantly terrestrial…” The OHWL of Lake Johanna is 878 feet according to Minnesota Department of Natural Resources. The Shore Impact Zone is the land located between the OHWL and a line parallel to it at a setback of 50 percent of the structure setback. In other words, the Shore Impact Zone is the twenty-five (25) feet nearest to the shore within the 50 foot rear yard setback of the OHWL. The proposed structure would be located 23.6 feet from the OHWL setback within the Shore Impact Zone on top of where an existing landing structure is located. Shoreline Impact Zone and 50’ structure setback. 2. General Regulations – Section 1325.01 Accessory Structures According to City Code Section 1325.01 Subd. 5, B, the exterior finish of accessory structures shall be compatible in appearance and material used with the principal structure served by the accessory structure. The Applicant is requesting a green roof design that does not match the exterior finish of the principal structure of the house, but the Applicant notes the construction methods are the same as any standard accessory structure. The contractor who will build the proposed structure, Scherer Brothers, has confirmed the wall load calculation needs and the truss load on the structure, confirming that there no additional structural needs for wall and roof framing that would affect the outward appearance of the structure. Staff is recommending as a condition of