FINAL ORDINANCE NO. 08-152 - Laserfiche WebLink

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to ensure such maintenance will continue in perpetuity. (3) Building Standards (a) Principal structures within open space planned unit developments shall not exceed 2 and '/z stories or 35 feet in height. (b) Accessory structures within open space planned unit developments shall not exceed 22 feet in height. (c) It is desired that the structures within neighborhoods convey a particular architectural style with similar building components, materials, roof pitches. The PUD Overlay ordinance crafted for each individual development should establish minimum architectural standards for the neighborhood. (d) All wells shall be located a minimum of fifty (50) feet from septic tanks and septic fields. (4) Landscaping Standards (a) A landscape plan for the entire site is required and shall consist of at least 10 trees per building site; and trees shall not be not less than 1.5 inch in caliper measured at 54 inches above grade level. (b) Boulevard landscaping is required along all streets to consist of at least 1 tree per every 30 feet or placed in clusters at the same ratio. (5) Impervious Surface Standards The maximum impervious surface allowable within an open space planned unit development shall be 20% of the land area not dedicated as preserved open space subject to the following: (a) Impervious surfaces created by roads, trails, and other planned impervious improvements shall count against the maximum allowed impervious coverage. (b) Remaining allowed impervious surface acreage may be distributed between the planned building sites, and maximums for each lot shall be clearly documented within the overlay district ordinance governing the development. (c) On individual lots, areas covered by pervious pavers or comparable systems may receive a 25 % credit against the lot's hardcover if the system is installed consistent with the City of Lake Elmo Engineering Standards Manual, and adequate storm water mitigation measures (as may be necessary) are installed to mitigate potential runoff created by the additional coverage above the allowed impervious surface threshold. All such credits shall be at the discretion of the City Engineer. (6) Trail Standards A trail system or sidewalks shall be established within open space planned unit developments in accordance with the following: (a) The linear footage of trails provided shall be at least equal in length to the sum of the centerline length of all public roads within the development. (b) All trails shall be constructed of asphalt or concrete in compliance with the standard city Page 12 of 26