A.
The identified floodplain area shall be:
(1)
Any areas of Borough of Lake City, classified as special flood hazard
areas (SFHAs) in the Flood Insurance Study (FIS) and the accompanying
Flood Insurance Rate Maps (FIRMs) dated June 7, 2017, and issued by
the Federal Emergency Management Agency (FEMA) or the most recent
revision thereof, including all digital data developed as part of
the Flood Insurance Study.
B.
The above referenced FIS and FIRMs, and any subsequent revisions
and amendments, are hereby adopted by Borough of Lake City and declared
to be a part of this chapter.
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.
(2)
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.
(a)
No permit shall be granted within any AE Zone without floodway,
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 development together
with all other existing and anticipated development would not result
in an increase in flood levels of more than one foot within the entire
community during the occurrence of the base flood discharge.
(b)
No new construction or development shall be located within the
area measured 50 feet landward from the top-of-bank of any watercourse,
unless the appropriate permit is obtained from the Department of Environmental
Protection Regional Office.
C.
The A area/district shall be those areas identified as an A Zone
on the FIRM included in the FIS prepared by FEMA and for which no
base flood elevations have been provided. For these areas, elevation
and floodway information from other federal, state, or other acceptable
sources shall be used when available. Where other acceptable information
is not available, the base flood elevation shall be determined by
using the elevation of a point on the boundary of the identified floodplain
area which is nearest the construction site. 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 municipality.
In the absence of any of the above data or documentation, the community
may require elevation of the lowest floor to be at least three feet
above the highest adjacent grade.
D.
Zone VE and Zone VI-30: special flood hazard areas subject to inundation by the one-percent annual chance (100-year) flood and subject to high velocity wave action. Within Zones VE and V1-30, the elevation of the bottom of the lowest horizontal member of the lowest floor (excluding piling and columns) of all new and substantially improved structures, must be obtained and a record of such shall be maintained by the Floodplain Administrator as designated in § 30-6.
E.
The V area/district Shall be those areas identified as a V Zone on
the FIRM included in the FIS prepared by FEMA and for those which
no base flood elevations have been provided.
F.
Coastal A Zone: An area within a special flood hazard area, landward
of a coastal high hazard area (V Zone) or landward of a shoreline
without a mapped coastal high hazard area, in which the principal
source(s) of flooding are astronomical tides and storm surges, and
in which, during base flood conditions, the potential exists for breaking
waves with heights greater than or equal to 1.5 feet. The inland limit
of the Coastal A Zone may be delineated on FIRMs as the limit of moderate
wave action (LiMWA).
G.
The AO and AH area/district shall be those areas identified as Zones
AO and AH on the FIRM and in the FIS. These areas are subject to inundation
by one-percent-annual-chance shallow flooding where average depths
are between one and three feet. In Zones AO and AH, drainage paths
shall be established to guide floodwaters around and away from structures
on slopes.
The identified floodplain area may be revised or modified by the Council where studies or information provided by a qualified agency or person documents the need for such revision. However, prior to any such change to the special flood hazard area, approval must be obtained from FEMA. Additionally, as soon as practicable, but not later than six months after the date such information becomes available, a community shall notify FEMA of the changes to the special flood hazard area by submitting technical or scientific data. See § 30-22B for situations where FEMA notification is required.
Should a dispute concerning any identified floodplain boundary
arise, an initial determination shall be made by the Borough of Lake
City and any party aggrieved by this decision or determination may
appeal to the Council. The burden of proof shall be on the appellant.
Prior to development occurring in areas where annexation or
other corporate boundary changes are proposed or have occurred, the
community shall review flood hazard data affecting the lands subject
to boundary changes. The community shall adopt and enforce floodplain
regulations in areas subject to annexation or corporate boundary changes
which meet or exceed those in 44 CFR 60.3.
