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h <br /> HARDCOVER ORDINANCE <br /> In I975, the Orono City Council adopted an ordinance limiting the percentage of lot area that <br /> can be covered with impervious surface ("hardcover") such as roofs, driveways, sidewalks, etc. <br /> on properties located within 1,000 feet of a lake. Studies have shown that sediments, oils, and <br /> debris carried into the lake from highly urbanized areas have a detrimental impact on the quality <br /> of water in the lake. The intent of Orono's ordinance is to ensure that rainfall run-off will be <br /> cleansed by filtering through grassed or vegetated�•ard 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 allolv 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 <br /> get 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 <br /> of hardcover in the zone. <br /> S. If changes in hardcover are proposed, yoc� must do a "before" worksheet and "after <br /> worksheet. If either results in percentages greater than those allowed, contact City staff <br /> before proceeding with your project planning! <br /> �� <br />