The identified floodplain area shall consist of the following
specific areas:
A. The Floodway Area shall be those areas identified in the FIS and
the FIRM as floodway and which represent the channel of a watercourse
and the adjacent land areas that must be reserved in order to discharge
the base flood without increasing the water surface elevation by more
than one foot at any point. This term shall also include floodway
areas which have been identified in other available studies or sources
of information for those Special Flood Hazard Areas where no floodway
has been identified in the FIS and FIRM.
(1) Within any floodway area, no encroachments, including fill, new construction,
substantial improvements, or other development, shall be permitted
unless it has been demonstrated through hydrologic and hydraulic analysis
performed in accordance with standard engineering practice that the
proposed encroachment would not result in any increase in flood levels
within the community during the occurrence of the base flood discharge.
(2) Within any floodway area, no new construction or development shall
be allowed, unless the appropriate permit is obtained from the Department
of Environmental Protection Regional Office.
B. The AE Area/District shall be those areas identified as an AE Zone
on the FIRM included in the FIS prepared by FEMA for which base flood
elevations have been provided.
(1) The AE Area adjacent to the floodway shall be those areas identified
as an AE Zone on the FIRM included in the FIS prepared by FEMA for
which base flood elevations have been provided and a floodway has
been delineated. AE Area without floodway shall be those areas identified
as an AE zone on the FIRM included in the FIS prepared by FEMA for
which base flood elevations have been provided but no floodway has
been determined.
(2) No permit shall be granted for any construction, development, use,
or activity within any AE Area/District without floodway unless it
is demonstrated that the cumulative effect of the proposed development
would not, together with all other existing and anticipated development,
increase the BFE more than one foot at any point.
C. The A Area/District shall be those areas identified as Zone A in
the FIS for which no 100-year flood elevations have been provided.
When available, information from other federal, state, and other acceptable
sources shall be used to determine the 100-year elevation, as well
as a floodway area, if possible. When no other information is available,
the 100-year elevation shall be determined by using a point on the
boundary of the identified floodplain area which is nearest the construction
site in question.
D. In lieu of the above, the municipality may require the applicant
to determine the elevation with hydrologic and hydraulic engineering
techniques. Hydrologic and hydraulic analyses shall be undertaken
only by professional engineers or others of demonstrated qualifications,
who shall certify that the technical methods used correctly reflect
currently accepted technical concepts. Studies, analyses, computations,
etc., shall be submitted in sufficient detail to allow a thorough
technical review by the City.
Should a dispute concerning any identified floodplain boundary
arise, an initial determination shall be made by the City Planning
Commission and any party aggrieved by this decision or determination
may appeal to the Council. The burden of proof shall be on the appellant.