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Line 103:
Line 103: If the system is not designed for infiltration, the bottom should slope at 1 - 5% toward the underdrain.
→Sizing stone reservoirs
===Sizing stone reservoirs===
===Sizing stone reservoirs===
The stone reservoir must meet both runoff storage and structural support requirements.
The stone reservoir must meet both runoff storage and structural support requirements.
The bottom of the reservoir should be level so that water infiltrates evenly.<br>
The bottom of the reservoir should be level so that water infiltrates evenly.
'''[[Permeable paving: Sizing]]'''
'''[[Permeable paving: Sizing]]'''