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� o� <br /> i; O _, � O �, <br /> �,�� ,j:;�;�f�:�. .-_ ,� ;� �I�'Y of �RONO <br /> ��\� } � / Municipal Offices <br /> ,,r�,, �� � , .-_ <br /> \ ,/ ��� <br /> `�,� � ,-�-?, :`�` �-;�G Street Address: Mailing Address: <br /> � '9$�Hp4' 2150 Kelley 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 camed 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 �vill be cleansed by filtering throu�h 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 gra��el driveways <br /> - Patios & decks (includes slatted decks) <br /> - Tops of retaining �valls & 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 /> l. Circle �vhich 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 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 /> ���orksheet. 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 />