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f <br />r-/ •- <br />r. <br />'•i; <br />yf v^_vycrrt of ORONO <br />Municipal Ofllces <br />Street Address: <br />2750 Kelley Parlmay <br />Orono, MN S53S6 <br />Mailing Address: <br />P.O. Box 66 <br />Crystal Bay. MN 55323 0066 <br />a^CQVER ORPn^^NCF, - In 1975, the Orono City Council adopted an ordinance <br />imiting the percentHge 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 />Studies 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 />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 />Hardcover includes: <br />- Roofs <br />0-75 0% <br />75-250'25% <br />250-500'30% <br />500-1000'35% <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 <br />WORKSHEET <br />1. Circle which setback zone (0-75', 75-250', etc.) the calculation is for. <br />2. <br />J. <br />4. <br />D. <br />For each item of hardcover within that zone, enter the length and width, and multiply <br />to get square footage (s.f.). <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 />If changes in hardcover are proposed, you should do a "before" worksheet and "after <br />worksheet. If either results in percentages greater than tliose allowed, contact City staff <br />before proceeding with your project planning! <br />Telephooe (612) 47^-7357 • FAX 473-0510 <br />12