A.
Alteration or relocation of watercourse.
(1)
No encroachment, alteration or improvement of any kind shall be made
to any watercourse until all adjacent municipalities which may be
affected by such action have been notified by the Borough and until
all required permits or approvals have been first obtained from the
Pennsylvania Department of Environmental Protection Regional Office.
(2)
No encroachment, alteration or improvement of any kind shall be made
to any watercourse unless it can be shown that the activity will not
reduce or impede the flood-carrying capacity of the watercourse in
any way.
(3)
In addition, FEMA and the Pennsylvania Department of Community and
Economic Development shall be notified prior to any alteration or
relocation of any watercourse.
B.
Technical or scientific data shall be submitted by the applicant
to FEMA for a Letter of Map Revision (LOMR) within six months of the
completion of any new construction, development or other activity
resulting in changes in the base flood elevation.
C.
In the identified floodplain area, the development and/or use of
any land shall be permitted, provided that the development and/or
use complies with the restrictions and requirements of this and all
other applicable codes and ordinances in force in the Borough.
D.
Within any identified floodplain area, 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, Bureau of Dams, Waterways
and Wetlands.
E.
Within any identified floodplain area, any new construction or substantial
improvement of a residential structure shall have the lowest floor
(including basement) elevated up to or above the regulatory flood
elevation.
F.
Within any identified floodplain area, any new construction or substantial
improvement of a nonresidential structure shall have the lowest floor
(including basement) elevated up to or above the regulatory flood
elevation, or be designed and constructed so that the space enclosed
by such structure shall remain completely or essentially dry during
any flood to that height. Any nonresidential structure, or part thereof,
having a lowest floor (including basement) which is not elevated to
at least 1 1/2 feet above the one-hundred-year flood elevation shall
be floodproofed in a completely or essentially dry manner in accordance
with the W1 or W2 space classification standards contained in the
publication entitled "Flood-Proofing Regulations" published by the
U.S. Army Corps of Engineers (June 1972, as amended March 1992), or
with some other equivalent standard. All plans and specifications
for such floodproofing shall be accompanied by a statement certified
by a registered professional engineer or architect which states that
the proposed design and methods of construction are in conformance
with the above-referenced standards.
G.
Fully enclosed space below the lowest floor (including basement)
is prohibited. The term "fully enclosed space" also includes crawl
spaces.
H.
Partially enclosed space below the lowest floor (including basement)
which will be used solely for the parking of vehicles, building access,
or incidental storage in an area other than a basement, shall be designed
and constructed to allow for the automatic entry and exit of floodwaters
for the purpose of equalizing hydrostatic forces on exterior walls.
I.
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)
A minimum of two openings have a net total area of not less than
one square inch for every square foot of enclosed space.
(2)
The bottom of all openings shall be no higher than one foot above
grade.
(3)
Openings may be equipped with screens, louvers, etc., or other coverings
or devices, provided that they permit the automatic entry and exit
of floodwaters.
J.
Accessory structures. Structures accessory to a principal building
need not be elevated or floodproofed to remain dry, but shall comply,
at a minimum, with the following requirements:
(1)
The structure shall not be designed or used for human habitation,
but shall be limited to the parking of vehicles or to the storage
of tools, material and equipment related to the principal use or activity.
(2)
Floor area shall not exceed 100 square feet.
(3)
The structure will have a low damage potential.
(4)
The structure will be located on the site so as to cause the least
obstruction to the flow of floodwaters.
(5)
Power lines, wiring and outlets will be elevated to the regulatory
flood elevation.
(6)
Permanently affixed utility equipment and appliances such as furnaces,
heaters, washers, dryers, etc., are prohibited.
(7)
Sanitary facilities are prohibited.
(8)
The structure shall be adequately anchored to prevent flotation or
movement and shall be designed to automatically provide for the entry
and exit of floodwater for the purpose of equalizing hydrostatic forces
on the walls. Designs for meeting this requirement must either be
certified by a registered professional engineer or architect or meet
or exceed the following minimum criteria:
(a)
A minimum of two openings having a net total area of not less
than one square inch for every square foot of enclosed space.
(b)
The bottom of all openings shall be no higher than one foot
above grade.
(c)
Openings may be equipped with screens, louvers, etc., or other
coverings or devices, provided that they permit the automatic entry
and exit of floodwaters.
The following minimum 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 landfill
materials 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 feet unless substantiated
data justifying steeper slopes are submitted to, and approved by,
the Floodplain Administrator; and
(5)
Be used to the extent to which it does not adversely affect adjacent
properties.
B.
Drainage facilities. Storm drainage facilities shall be designed
to convey the flow of stormwater runoff in a safe and efficient manner.
The system shall ensure 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 damage 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 § 110-23, 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 and other finishes used at or below the regulatory flood elevation
shall be of marine or water-resistant quality.
(2)
Adhesives used at or below the regulatory flood elevation shall be
of marine or water-resistant variety.
(3)
All wooden components (doors, trim, cabinets, etc.) shall be finished
with a marine or water-resistant paint or other finishing material.
L.
Equipment. Water heaters, furnaces, air-conditioning and ventilating
units, and other 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 any
discharge from the system into floodwaters. Additional provisions
shall be made for the drainage of these systems in the event that
floodwater infiltration occurs.
A.
In accordance with the Pennsylvania Flood Plain Management Act and
the regulations adopted by the Department of Community and Economic
Development as required by the Act, any new or substantially improved
structure which will be used for the production or storage of any
of the following dangerous materials or substances or will be used
for any activity requiring the maintenance of a supply of more than
550 gallons, or other comparable volume, of any of the following dangerous
materials or substances on the premises, or will involve the production,
storage or use of any amount of radioactive substances, shall be subject
to the provisions of this section in addition to all other applicable
provisions. The following list of materials and substances are considered
dangerous to human life:
(1)
Acetone.
(2)
Ammonia.
(3)
Benzene.
(4)
Calcium carbide.
(5)
Carbon disulfide.
(6)
Celluloid.
(7)
Chlorine.
(8)
Hydrochloric acid.
(9)
Hydrocyanic acid.
(10)
Magnesium.
(11)
Nitric acid and oxides of nitrogen.
(12)
Petroleum products (gasoline, fuel, oil, etc.).
(13)
Phosphorus.
(14)
Potassium.
(15)
Sodium.
(16)
Sulphur and sulphur products.
(17)
Pesticides (including insecticides, fungicides, and rodenticides).
(18)
Radioactive substances, insofar as such substances are not otherwise
regulated.
B.
Within any identified floodplain area, any new or substantially improved structure of the kind described in Subsection A above shall be prohibited within the area measured 50 feet landward from the top-of-bank of any watercourse.
C.
Where permitted within any identified floodplain area, any new or substantially improved structure of the kind described in Subsection A shall be:
(1)
Elevated or designed and constructed to remain completely dry up
to at least 1 1/2 feet above the one-hundred-year flood; and
(2)
Designed to prevent pollution from the structure or activities conducted
in the structure during the course of a one-hundred-year flood.
Any such structure, or part thereof, that will be built below
the regulatory flood elevation shall be designed and constructed in
accordance with the standards for completely dry floodproofing contained
in the publication "Floodproofing Regulations" (U.S. Army Corps of
Engineers, June 1972 as amended March 1992), or with some other equivalent
watertight standard.
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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 are not available,
shall be supported by hydrologic and hydraulic engineering analyses
that determine base flood elevations and floodway information. The
analyses shall be prepared by a licensed professional engineer in
a format required by FEMA for a conditional letter of map revision
or letter of map revision. Submittal requirements and processing fees
shall be the responsibility of the applicant.