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. ` � �°�o y '` Hardcover Information `� G� www.ci.orono.mn.us `�'F£S H OR� 952-249-4620 The City of Orono recognizes through its comprehensive plan that managing stormwater runoff is essential for protection of the water quality of Lake Minnetonka and Orono's other lakes, for preservation of the natural wildlife habitat within marshlands, and for protection against flooding and flood damage. Since 1975 Orono has regulated hardcover within 1,000 feet of lakes, and since 1992 also within 300 feet of Painters, Long Lake, Wolsfeld, Stubbs Bay, and Dickey Lake creeks. Limiting hardcover helps to improve water quality by allowing for infiltration of stormwater runoff into the ground as well as promoting aquifer recharge. In September 2012 the City updated its hardcover regulations and established the Stormwater Quality Overlay District, encompassing all properties that are subject to hardcover regulations. Hardcover `zones' based on set distances from the lakeshore have been eliminated, and properties in the District have each been assigned to one of five `Tiers' within which a defined percentage of the entire property is allowed to be hardcovered. The Tier assignments were established based primarily on proximity to a lake or waterway, and are documented in the official Stormwater Quality Overlay District Tier Map. The percentage of hardcover allowed within each Tier is shown in the following table: Assigned Tier Allowed Hardcover Percentage Tier 1 25% of gross lot area Tier 2 30% of gross lot area Tier 3 35% of gross lot area Tier 4 (properties zoned RPUD) 50% of gross lot area Tier 5 (properties zoned Industrial) 85% of gross lot area The updated regulations allow most lakeshore properties additional hardcover as compared to the previous ordinance. Also, the definition of hardcover has been revised to not include porous landscaping materials underlain by permeable landscaping fabric. The updated definition of`hardcover' is as follows: Hardcover means a hard surface that prevents or retards entry of water into the soil and causes water to run off the surface in greater quantities and at an increased rate of flow than prior to development. Hardcover shall include but not be limited to the following: all building footprints, driveways, sidewalks, stepping stones, retaining walls, patios, courts (sport, tennis, etc), decks, pools, areas used for the extended outdoor storage of vehicles or equipment, and all other similar features or surfaces as determined by the City Engineer or City Planner. HARDCOVER INCLUDES: • Roofs • Porous or pervious pavement • Sidewalks, steps, and patios • Tennis or Sport Courts • Decks, including decks on play equipment • Building Footprints-see definitions below. (even if there are gaps between the boards) • Any other vehicle, material, equipment, or • Driveways, regardless of surface material structure that prevents absorption of rainfall • Tops of retaining walls, including boulder and is maintained in the same location long walls, and isolated boulders enough that no vegetation grows under it. • Swimming Pools This is an information sheet. Every effort has been made to insure the accuracy of the information contained herein;however, if any information is not consistent with provisions of the City Code, the Code provisions will prevail. 1 /6