Laserfiche WebLink
HARDCOVER ORDINANCE-In 1975, the Orono City Council adopted an ordinance limiting <br />the percentage oflot 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 carried 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 -Allowed Percentages: <br />0-75 0% <br />75-250' 25% <br />250-500' 30% <br />500-1000' 35% <br />Hardcover includes: <br />-Roofs <br />-Sidewalks <br />-Paved or gravel driveways <br />-Patios & decks (includes slatted decks) <br />-Tops of retaining walls & rock walls <br />-Decorative landscape areas underlain by plastic sheeting or fabric <br />-Any other surface that does not allow direct absorption of rainfall into <br />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 />4. Divide by the total area of property within the zone and multiply by 100 to get percentage of <br />hardcover in the zone. <br />5. If changes in hardcover are proposed, you should do a "before" worksheet and "after worksheet. <br />If either results in percentages greater than those allowed, contact City staff before proceeding <br />with your project planning! <br />12