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*In [[swales]] conveying flowing water a freeboard of 300 mm is generally accepted as a good starting point.
*In [[swales]] conveying flowing water a freeboard of 300 mm is generally accepted as a good starting point.
*In [[bioretention]] the freeboard is the depth between the invert of the [[overflow]] and the [[inlet]]. 150 mm will suffice, so long as the inlet will not become inundated during design storm conditions.
*In [[bioretention]] the freeboard is the difference between the invert elevation of the [[overflow]] structure and the [[inlet]]. 150 mm will suffice, so long as the inlet will not become inundated during design storm conditions.
*In above grade [[stormwater planters]], the equivalent dimension would be the depth between the invert of the overflow and the lip of the planter (150 mm minimum)
*In above grade [[stormwater planters]], the equivalent dimension would be the depth between the invert of the overflow and the lip of the planter (150 mm minimum)