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HARDCOVER CALCULATION WORKSHEET
SETBACK ZONE: (CIRCLE ONE) 0-75' 75-250' 250-500' S00-1000'
EXISTING HARDCOVER IN ZONE
A. House x = S.F.
L,ength W idth
x = S.F.
x = S.F.
x = S.F.
B. Garage x = S.F.
C. Driveway x = S.F.
x = S.F.
D. Sidewalk x = S.F.
x = S.F.
E. Patio/Deck x = S.F.
x = S.F.
F. Landscape x = S.F.
Underlain x = S.F.
By Plastic x = S.F.
G. Other x = S.F.
TOTAL HARDCOVER IN ZONE - S.F. A
TOTAL PROPERTY AREA IN ZONE - S.F. B
A — B x 100 = %
A — B x 100 = %
PROPOSED HARDCOVER IN ZONE
A. House Z� x `" Z = I /7 � S.F.
Length W idth
l�c r--�,. X ,'� _ � b S.F.
�C . ,: t,i x = 3 � S.F.
��� � x / "� _ /��' S.F.
B. Gazage x = S.F.
�`" 'r�"`�� C. Driveway /2 x /�l� _ �� � �'� S.F. s,�r;�� 1�
F`' r' '�. Z �( /i':' _ � � S.F.
,1, _
D. Sidewalk r � x `I = ? � S.F.��r�•>',S `7�
S 3 x Zv = G c� S.F. s�,n'"a `l�'
E. Patio/Deck x = S.F.
x = S.F.
F. Landscape x = S.F.
Underlain x = S.F.
By Plastic x = S.F.
G. Other x = S.F.
TOTAL HARDCOVER IN ZONE �S �S� - 3, �7 Z S.F. A
TOTAL PROPERTY AREA IN ZONE =�v.-.°:� �'�
u��- — 3, 5 3`7 S.F. B
a - s ��?,��`� X ioo = �a, � �io
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Orono, MN 55356 Crystal Bay, MN 55323•0066
HARDCOVER ORDINANCE - In 1975, the Orono City Council adopted an ordinance
limiting the percentage of lot area that can be covered with impervious surface ("hardcover")
such as roofs, driveways, sidewalks, etc. on properties located within 1,000 feet of a lake.
Studies have shown that sediments, oils, and debris carried into the lake from highly urbanized
areas have a detrimental impact on the quality of water in the lake. The intent of Orono's
ordinance is to ensure that rainfall run-off will be cleansed by filtering through grassed or
vegetated yard areas before entering the lake.
Hardcover Zones - Allowed Percentages:
0-75 0%
75-250' 25%
250-500' 30%
500-1000' 35%
Hardcover includes:
- Roofs
- Sidewalks
- Paved or gravel driveways
- Patios & decks (includes slatted decks)
- Tops of retaining walls & rock walls
- Decorative landscape areas underlain by plastic sheeting or fabric
- Any other surface that does not allow direct absorption of rainfall into
the ground
INSTRUCTIONS FOR COMPLETING HARDCOVER CALCULATION WORKSHEET
1. Circle which setback zone (0-75', 75-250', etc.) the calculation is for.
2. For each item of hardcover within that zone, enter the length and width, and multiply
to get square footage (s.f.).
3. Add up a11 the square footages to get total square footage of hardcover.
4. Divide by the total area of property within the zone and multiply by 100 to get
percentage of hazdcover in the zone.
5. If changes in hardcover are proposed, you should do a "before" worksheet n� "after
worksheet. If either results in percentages greater than those allowed, contact City staff
before proceedin� with your project planning!
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Telephone (612) 473-7357 • FAX 473-0510