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» i ^ ^ . •-/ - <br />HARDCOVER ORDINANCE - In 1975, the Orono City Council adopted an ordinance limiting the <br />percentage of lot area that can be covered with impervious surface ("hardcover”) such as roofs, <br />driveways, sidewalks, etc. on properties located within 1,000 feet of a lake. Studies have shown that <br />sediments, oils, and debris earned into the lake from highly urbanized areas have a detrimental <br />Impact on the quality of water in the lake. The Intent of Orono's ordinance is to ensure that rainfall <br />run-off will be cleansed by filtering through grassed or vegetated yard areas before entering the lake. <br />Hardcover Zones - <br />Allowed <br />Percentages: <br />Hardcover includes: <br />• <br />0-75 0% <br />75-250* 25% <br />250-500* 30% <br />500-1000* 35% <br />^ Roofs, <br />v' Sidewalks, <br />^ Paved or gravel driveways, <br />^ Patios & decks (includes slatted decks), <br />Tops of retaining walls & rock walls, <br />v' Decorative landscape areas underlain by plastic sheeting or <br />fabric, or <br />^ Any other surface that does not allow direct absorption of rainfall <br />into the ground. <br />INSTRUCTIONS FOR COMPLETING HARDCOVER CALCULATION WORKSHEET <br />1. Circle which setback zone (0-75*. 75-250', etc.) the calculation is for. <br />2. For each item of hardcover within that zone, enter the length and width, and multiply to get <br />square footage (s.f.). <br />3. Add up all the square footages to get total square footage of hardcover. <br />m <br />4. Divide by the total area of property within the zone and multiply by 100 to get percentage of <br />hardcover in the zone.