[Amended 3-7-2017 by Ord.
No. 382]
The identified floodplain area shall be any areas of Township
of Doylestown, classified as special flood hazard areas (SFHAs) in
the Flood Insurance Study (FIS) and the accompanying Flood Insurance
Rate Maps (FIRMs) dated March 21, 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.
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 rotection 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 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.
(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.
(1)
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.
(2)
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.
The identified floodplain area may be revised or modified by the Board of Supervisors 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 § 96-23B for situations where FEMA notification is required.
Should a dispute concerning any identified floodplain boundary
arise, an initial determination shall be made by the Township of Doylestown
and any party aggrieved by this decision or determination may appeal
to the Board of Supervisors. 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.
A.
The floodplain districts described above shall be considered as overlays
to the existing underlying districts as shown on the Official Zoning
Ordinance Map and, as such, the provisions for the floodplain districts
shall serve as a supplement to the underlying district provision.
B.
Where there happens to be any conflict between the provisions or
requirements of any of the floodplain districts and those of any underlying
district, the more restrictive provisions and/or those pertaining
to the floodplain districts shall apply.
C.
In the event that any provision concerning a floodplain district
is declared inapplicable as a result of any legislative or administrative
actions or judicial discretion, the basic underlying district provisions
shall remain applicable.
