Within the identified floodplain area (AE), the following provisions
shall apply:
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.
The following standards shall apply for all construction and
development proposed within any identified floodplain area:
A. Fill. If fill is used, it shall:
(1)
Extend laterally at least 15 feet beyond the building line from
all points.
(2)
Consist of soil or small rock materials only. Sanitary landfills
shall not be permitted.
(3)
Be compacted to provide the necessary permeability and resistance
to erosion, scouring, or settling.
(4)
Be no steeper than one vertical to two horizontal, unless substantiated
data, justifying steeper slopes, are submitted to and approved by
the Zoning Officer.
(5)
Be used to the extent to which it does not adversely affect
adjacent properties.
B. Drainage. Storm drainage facilities shall be designed to convey the
flow of stormwater runoff in a safe and efficient manner. The system
shall insure proper drainage along streets and provide positive drainage
away from buildings. The system shall also be designed to prevent
the discharge of excess runoff onto adjacent properties.
C. Water and sanitary sewer facilities and systems.
(1)
All new or replacement water and sanitary sewer facilities and
systems shall be located, designed and constructed to minimize or
eliminate flood damages and the infiltration of floodwaters.
(2)
Sanitary sewer facilities and systems shall be designed to prevent
the discharge of untreated sewage into floodwaters.
(3)
No part of any on-site sewage system shall be located within
any identified floodplain area except in strict compliance with all
state and local regulations for such systems. If any such system is
permitted, it shall be located so as to avoid impairment to it, or
contamination from it, during a flood.
D. Other utilities. All other utilities such as gas lines, electrical
and telephone systems shall be located, elevated (where possible),
and constructed to minimize the chance of impairment during a flood.
E. Streets. The finished elevation of all new streets shall be no more
than one foot below the regulatory flood elevation.
F. Storage. All materials that are buoyant, flammable, explosive or, in times of flooding, could be injurious to human, animal, or plant life, and not listed in §
154-405, Development which may endanger human life, shall be stored at or above the regulatory flood elevation and/or floodproofed to the maximum extent possible.
G. Placement of buildings and structures. All buildings and structures
shall be designed, located and constructed so as to offer the minimum
obstruction to the flow of water and shall be designed to have a minimum
effect upon the flow and height of floodwater.
H. Anchoring.
(1)
All buildings and structures shall be firmly anchored in accordance
with accepted engineering practices to prevent flotation, collapse
or lateral movement.
(2)
All air ducts, large pipes, storage tanks, and other similar
objects or components located below the regulatory flood elevation
shall be securely anchored or affixed to prevent flotation.
I. Floors, walls and ceilings.
(1)
Wood flooring used at or below the regulatory flood elevation
shall be installed to accommodate a lateral expansion of the flooring,
perpendicular to the flooring grain, without causing structural damage
to the building.
(2)
Plywood used at or below the regulatory flood elevation shall
be of a "marine" or "water-resistant" variety.
(3)
Walls and ceilings at or below the regulatory flood elevation
shall be designed and constructed of materials that are water resistant
and will withstand inundation.
(4)
Windows, doors, and other components at or below the regulatory
flood elevation shall be made of metal or other water-resistant material.
J. Paints and adhesives.
(1)
Paints or other finishes used at or below the regulatory flood
elevation shall be of a "marine" or "water-resistant" quality.
(2)
Adhesives used at or below the regulatory flood elevation shall
be of a "marine" or "water-resistant" quality.
(3)
All wooden components (doors, trim, cabinets, etc.) used at
or below the regulatory flood elevation shall be finished with a "marine"
or "water-resistant" paint or other finishing material.
K. Electrical components.
(1)
Electrical distribution panels shall be at least three feet
above the one-hundred-year flood elevation.
(2)
Separate electrical circuits shall serve lower levels and shall
be dropped from above.
L. Equipment. Water heaters, furnaces, air-conditioning and ventilation
units, and other electrical, mechanical, or utility equipment or apparatus
shall not be located below the regulatory flood elevation.
M. Fuel supply systems. All gas and oil supply systems shall be designed
to prevent the infiltration of floodwaters into the system and discharges
from the system into floodwaters. Additional provisions shall be made
for the drainage of these systems in the event that floodwater infiltration
occurs.
N. Uniform Construction Code coordination. The standards and specifications
contained 34 Pa. Code (Chapters 401 to 405), as amended and not limited
to the following provisions, shall apply to the above and other sections
and subsections of this chapter, to the extent that they are more
restrictive and supplement the requirements of this chapter.
O. Enclosed space below the lowest floor. Enclosed space below the lowest
floor (including basement) may be permitted, provided that such space
shall be designed to automatically equalize hydrostatic flood forces
on exterior walls by allowing for entry and exit of floodwater. Designs
for meeting this requirement must either be certified by a registered
professional engineer or architect or meet or exceed the following
minimum criteria:
(1)
At least two openings shall be provided having a total net open
area of at least one square inch for every square foot of enclosed
space subject to flooding.
(2)
The bottom of all openings shall be no higher than one foot
above grade.
(3)
Openings may be equipped with screens, louvers, or other coverings
or devices, provided that they permit the automatic entry and exist
of floodwaters.
Recreational vehicles in Zones A1-30, AH and AE must either:
A. Be on the site for fewer than 180 consecutive days;
B. Be fully licensed and ready for highway use; or
C. Meet the permit requirements for manufactured homes in §
154-406.
For all subdivision proposals and development proposals containing at least 50 lots or at least five acres, whichever is the lesser, in flood hazard areas where base flood elevation data is not available, such proposals shall be in strict conformity with the provisions of the Subdivision and Land Development Ordinance, contained in Chapter
258 of the Code of the Borough of Chambersburg, as amended from time to time.