A.
The identified floodplain area shall be any areas of Upper Burrell
Township classified as special flood hazard areas (SFHAs) in the Flood
Insurance Study (FIS) and the accompanying Flood Insurance Rate Maps
(FIRMs) dated March 17, 2011 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 Upper Burrell Township and declared
to be a part of this chapter.
The identified floodplain area shall consist of the following
specific areas:
A.
Floodway area.
(1)
Description. The area identified as floodway in the FIS which represents
the channel of a watercourse and the adjacent land areas that must
be reserved in order to discharge the base flood without cumulatively
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 floodplain areas where no floodway has been identified
in the FIS.
B.
Special floodplain area.
(1)
Description. The areas identified as Zones AE and A1-30 in the FIS
which are subject to inundation by the one-percent-annual chance flood
event determined by detailed methods and have base flood elevations
(BFEs) shown.
(2)
Special requirements.
(a)
No new construction or development shall be located within the
area measured 50 feet landward from the top-of-bank of any watercourse,
unless a permit is obtained from the Department of Environmental Protection
Regional Office.
(b)
In special floodplain areas without a designated floodway, no
new development shall be permitted unless it can be demonstrated that
the cumulative effect of all past and projected development will not
increase the BFE by more than one foot.
C.
Approximate floodplain area.
(1)
Description. The areas identified as Zone A in the FIS which are
subject to inundation by the one-percent-annual-chance flood event
determined using approximate methodologies. Because detailed hydraulic
analyses have not been performed, no BFEs or flood depths are shown.
(2)
Special requirements:
(a)
No new construction or development shall be located within the
area measured 50 feet landward from the top-of-bank of any watercourse,
unless a permit is obtained from the Department of Environmental Protection
Regional Office.
(b)
When available, information from other federal, state, and other
acceptable sources shall be used to determine the BFE, as well as
a floodway area, if possible. When no other information is available,
the BFE shall be determined by using a point on the boundary of the
identified floodplain area which is nearest the construction site
in question.
(c)
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 Township of Upper Burrell.
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, approval must be obtained from
the FEMA. Additionally, as soon as practicable, but not later than
six months after the date such information becomes available, a community
shall notify the FEMA of the changes by submitting technical or scientific
data.
Should a dispute concerning any identified floodplain boundary
arise, an initial determination shall be made by the Upper Burrell
Township Planning Commission and any party aggrieved by this decision
or determination may appeal to the Board. The burden of proof shall
be on the appellant.
