A.Â
The identified floodplain area shall be any areas of the Borough
of Waynesboro, classified as special flood hazard areas (SFHAs) in
the Flood Insurance Study (FIS) and the accompanying Flood Insurance
Rate Maps (FIRMs) dated January 18, 2012, 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.Â
The above referenced FIS and FIRMs, and any subsequent revisions
and amendments are hereby adopted by the Borough of Waynesboro and
declared to be a part of this chapter.
A.Â
The Floodway District (FW) is delineated for purposes of this chapter
using the criteria that a certain area within the floodplain must
be capable of carrying the waters of the one-hundred-year flood without
increasing the water surface elevation of that flood more than one
foot at any point. The areas included in the Floodway District are
specifically defined in the Floodway Data Table contained in the above-referenced
FIS and shown on the accompanying Flood Hazard Boundary and Floodway
Map, as revised. The term shall also include floodway areas which
have been identified in other available studies or sources of information
for those floodplain areas where no floodway has been identified in
the Flood Insurance Study.
B.Â
The AE Area/District without floodway shall be those areas identified
as an AE Zone on the FIRM included in the FIS prepared by FEMA and
for which base flood elevations have been provided in the FIS but
no floodway has been delineated.
C.Â
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
one-percent-annual-chance flood elevations have been provided. For
these areas, elevation and floodway information from other federal,
state, or other acceptable source shall be used when available. Where
other acceptable information is not available, the 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.
D.Â
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 delineation of any of the floodplain districts may be revised
by the Borough Council where natural or man-made changes have occurred
and/or more detailed studies conducted or undertaken by the United
States Army Corps of Engineers or other qualified agency or individual
documents the need or possibility for such change. However, prior
to any such change, approval must be obtained from the Federal Emergency
Management Agency. 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.