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The diagrams below illustrate the basic
lot grading requirements for all 5
different lot types of single-family and
duplex.
Click on the images below to view a
larger, printable PDF file.
(opens in new window) |
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Lot Type A
Rear to front surface
drainage (2-3% overall slope) |
Lot Type B
Rear to front surface
drainage (3-6% overall slope) |
Lot Type AB Plan
Grading Details |
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Lot Type C
Rear to front surface
drainage (>6% overall slope) |
Lot type D
Standard split surface
drainage (1.5% overall slope) |
Lot Type CD Plan
Grading Details |
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Lot Type W
Split surface drainage
for walkout basement |
Lot Type W Plan
Grading Details |
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Other related
requirements:
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Critical Swale
Rear to front surface
drainage |
Critical Swale
Split/Front to back
surface drainage |
Lake, Ravine & Top of Bank
shows the cross-section
of the requirements |
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Splash Pad
which carries roof leader
and sump pump discharge away from
foundation wall |
Downspout
which carries surface
water away form eavestroughs to drainage
swales |
Side-Lot Landscaping
shows landscaping
requirements on finish grade level |
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