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1 <br />► <br />\’ <br />GITYofORONO <br />Municipal Ofllces <br />^^«8bo;^ <br />Street Address: <br />2750 Kelley Parkway <br />Orono, MN 55356 <br />Mailing Address: <br />P.O. Box 66 <br />Crystal Bay. MN 55323 0066 <br />HARDCOVER ORDINANCE - In 1975, the Orono City Council adopted an ordinance <br />limiting the percentage of lot area that can be covered with impervious surface ("hardcover") <br />such as roofs, driveways, sidewalks, etc. on properties located within 1,000 feet of a lake. <br />Smdies have shown that sediments, oils, and debris carried into the lake from highly urbanized <br />areas have a detrimental impact on the quality of water in the lake. The intent of Orono ’s <br />rdinance is to ensure that n infall run-off will be cleansed by filtering through grassed or <br />vegetated yard areas before entering the lake. <br />Hardcover Zones - Allowed Percentages: <br />0-75 0% <br />75-250' 25% <br />t_-350-500;_______ -30?/o <br />500-1000' 35% <br />Hardcover includes: <br />- Roofs <br />- Sidewalks <br />- Paved (r 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 v <br />INSTRUCTIONS FOR COMPLETING HARDCOVER CALCULATION <br />WORKSHEET <br />1. <br />2. <br />Circle which setback zone (0-75', 75-250', etc.) the calculation is for. <br />For each item of hardcover within that zone, enter the length and width, and multiply <br />to get square footage (s.f.). <br />3. <br />4. <br />Add up all the square footages to get total square footage of hardcover. <br />Divide by the total area of property within the zone and multiply by 100 to get <br />percentage of hardcover in the zone. <br />5.If changes in hardcover are proposed, you should 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 />Telephone (612) 473-7357 • FAX 473-0510 <br />12 <br />I <br />i