Grading shall conform to Chapter 70 of the City of Palmdale Building Code and the following criteria. In case of a discrepancy, the following criteria shall govern.
Drainage
Minimum Gradients for residential sites:
Dirt, grass, etc. 1.0%
Fine graded residential lot - dirt 2.0% sheet flow away from building pad for minimum of 3', pad shall be at least 0.3' above high point of swale.
Minimum gradients for flat land industrial sites:
Earth at rough grade stage 0.5%
Earth fine grade 1.0%
Asphalt Pavement (sheet flow) 1.0%
Concrete Pavement (sheet flow) 1.0%
Concrete drain in earth area 0.5%
Concrete gutter in paved area 0.4%
Maximum gradient for sheet flow 20.0%
Design for water to flow to nearest practical street, storm drain or natural watercourse. Cross lot drainage is to be avoided.
Show design and location of all drainage devices.
Drainage shall not sheet flow over the top of any slopes steeper than 5:1.
For residential lots, swales shall be 3 feet minimum from building pad.
Common side yard swales are not acceptable.
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