§42-235.5
Standards for Riverine Floodplains With Base Flood Elevations but Without Established
Floodways or Non-encroachment Areas. 
Along rivers and streams where BFE data is provided by FEMA or is available from another source but neither
floodway nor non-encroachment areas are identified for a Special Flood Hazard Area on the FIRM or in the FIS
reports, the following requirements shall apply to all development within such areas:
A.
Standards outlined in §42-235 (Flood Hazard Reduction); and
B.
Until a regulatory floodway or non-encroachment area is designated, No encroachments, including fill,
new construction, substantial improvements, or other development, shall be permitted unless certification
with supporting technical data by a registered professional engineer is provided demonstrating that the
cumulative effect of the proposed development, when combined with all other existing and anticipated
development, will not increase the water surface elevation of the base flood more than one (1) foot at any
point within the community.