Development may not occur in the floodplain where alternative locations exist due to the inherent hazards and risks involved. Before a permit is issued, the applicant shall demonstrate that new structures cannot be located out of the floodplain and that encroachments onto the floodplain are minimized.
All new or substantially improved residential and nonresidential structures shall have the lowest floor elevated to or above the flood protection elevation. Basements are not permitted. In nontidal and tidal floodplains, horizontal expansions which increase the footprint and that are less than substantial shall also have the lowest floor of the expansion elevated to or above the flood protection elevation. The elevation of the lowest floor shall be certified by a registered surveyor or professional engineer on the elevation certificate, after the lowest floor is in place. Enclosures below the flood protection elevation must be constructed with water-equalizing vents to meet the specifications of § 46-33.
A. 
The placement of more than 600 cubic yards of fill per parcel/lot in the floodplain is prohibited except by variance. Elevating buildings by other methods must be considered unless 600 cubic yards or less of fill are required. An applicant shall demonstrate that fill is the only alternative to raising the building to at least the flood protection elevation, and have verified by a registered professional engineer that the amount of fill used will not affect the flood storage capacity or increase flooding onto neighboring properties.
B. 
In the event buildings on adjacent properties are known or determined to be subject to flooding under current conditions, the local permitting official may require submission of hydrologic and hydraulic analyses to adequately demonstrate the effects of the proposed fill. The conditions described in § 46-39 must be met whenever fill is used.
A. 
To achieve long-term flood damage avoidance and protection of the natural and beneficial floodplain functions, creation of any new flood-prone building sites shall not be permitted in any new subdivisions regardless of size, number of lots and location.
B. 
All other provisions of this Article and Articles VI and VII apply to subdivisions. The local permitting official may specify additional provisions in the plan review.
In new subdivisions in nontidal and tidal floodplains, each lot platted must have a suitable building site outside the floodplain. Consideration must be given to clustering development lots out of the floodplain and preserving the floodplain as open space. An access road at or above the elevation of the one-hundred-year flood shall be provided.