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 the 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.
(2) Special requirements:
(a)
Any encroachment that would cause any increase in flood heights
shall be prohibited.
(b)
No new construction or development shall be allowed, unless
a permit is obtained from the Department of Environmental Protection
Regional Office.
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. 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 of DuBois.
D. Shallow flooding area.
(1) Description. The areas identified as Zones AO and AH in the FIS.
These areas are subject to inundation by the one-percent-annual-chance
shallow flooding where average depths are between one and three feet.
(2) Special requirements. Establish drainagepaths to guide floodwaters
around and away from structures on slopes.
The identified floodplain area may be revised or modified by
the City Council 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 Planning Commission
for the City of DuBois and any party aggrieved by this decision or
determination may appeal to this City Council. The burden of proof
shall be on the appellant.