Regulatory floodway

Regulatory floodwaythe area regulated by Federal, State or local requirements; the channel of a river or other watercourse and the adjacent land areas that must be reserved in an open manner, i.e., unconfined or unobstructed either horizontally or vertically, to provide for the discharge of the base flood so the cumulative increase in water surface elevation is no more than a designated amount (not to exceed one foot as set by the NFIP).

Source

28 CFR § 63.4

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Scoping language

Throughout this part, the following basic definitions shall apply:

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