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� O� <br /> O ::, O <br /> ���' �- CITY of ORONU <br /> :_:�,:.T:� <br /> 't� r� �� �. <br /> � f' � i'� �� ��, Municipal Offices <br /> � <br /> '� �����`�a*� G Mailin Address: <br /> �:-,�,� � I, <br /> ,� Ii�,,�,�.;�r'�,.t.;i � Street Address: S <br /> `9k'�`�pg' 2750 Keiley Parkway P.O. Box 66 <br /> Orono, MN 55356 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 /> 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 /> 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 <br /> into the grc,und <br /> INSTRti CTIONS FOR COMPLETING HARDCOVER CALCULATION <br /> 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 �vidth, 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. Divide by the total area of property �vithin 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 /> 10 <br />