Grading

From LID SWM Planning and Design Guide
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Grading


Grading Standards
Use Extreme range (%) Desirable range (%) AODA
Public Streets 0.5 - 10 1 - 8
Private streets 0.5 - 20 1 - 12
Service lanes 0.5 - 15 1 - 10
Parking areas 0.5 - 8 1 - 5
Parking ramps up to 20 up to 15
Collector walks 0.5 - 12 1 - 8
Entrance walks 0.5 - 8 1 - 4
Pedestrian ramps up to 12 up to 8
Stairs 25 - 50 33 - 50
Game courts 0.5 - 2 0.5 - 1.5
Paved gutters 0.25 - 100 1 - 50
Grassed swales 0.5 - 15 2 - 10
Terraces and sitting areas 0.5 - 3 1 - 2
Grassed banks up to 50 up to 33
Planted banks up to 100 up to 50