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GITYor ORONO <br />Mualdpy Ofllm <br />Sttwtlddritt: <br />2750 Wki ^mkrntt <br />OroM, m 55356 <br />llaUk«Mimsi <br />P.O. Bm 66 <br />Crystil Ui, m 55323H»66 <br />llARRrov^F.M 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, sidc\valks, etc. on properties located within 1,000 feet of a lake. <br />Studies have ^own 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 />ordinance is to ensure that rainfall 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 />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 *vrf?c? that d.'fs rot 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 <br />to get square footage (s f.). <br />3. Add up all the square footages to get total square footage of hardcover. <br />4. Dis ide 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 arc proposed, you should do a "before" worksheet ood "after <br />worksheet. If either results in percentages greater than those allows contact City staff <br />before proceeding with your project planning! <br />1UcplMM(6U) 249-4600 • Fn (612) 249-4616