A.
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 municipality
and until all required permits or approvals have first been obtained
from the Department of Environmental Protection regional office. In
addition, the Federal Emergency Management Agency and Pennsylvania
Department of Community and Economic Development shall be notified
prior to any alteration or relocation of any watercourse.
B.
Any new construction, development, uses or activities allowed within
any identified floodplain area shall be undertaken in strict compliance
with the provisions contained in this chapter and any other applicable
codes, ordinances and regulations.
A.
Within any FW (floodway area), the following provisions apply:
B.
Within any FA (general floodplain area), the following provisions
apply:
(1)
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.
(2)
Any new construction or development which would cause any increase
in flood heights shall be prohibited within any floodway area.
A.
Residential structures. 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. The design and construction
standards and specifications contained in the 2003 International Building
Code (Sections 1612.4, 1603.1.6 and 3403.1) and in the 2003 International
Residential Code (Sections R323.1.4, R323.2.1, and R323.2.2) and ASCE
24 (Sections 2.4 and 2.5, Chapter 5) and 34 Pa. Code (Chapter 401
through 405, as amended) shall be utilized.
B.
Nonresidential structures.
(1)
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 either completely or essentially dry
during any flood up to that height.
(2)
Any nonresidential structure, or part thereof, having a lowest floor
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.
(3)
The design and construction standards and specifications contained
in the International Building Code (Sections 1603.1.2, 1603.1.6, 1605.2.2,
1606.5, 1612.5.1 and 3403.1) and ASCE 24 (Section 2.4 and Chapter
7) and 34 Pa. Code (Chapters 401 through 405, as amended) shall be
utilized.
C.
Space below the lowest floor.
(1)
Fully enclosed space below the lowest floor (including basement)
is prohibited.
(2)
Partially enclosed space below the lowest floor (including basement)
which will be used solely for the parking of a vehicle, 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.
The term "partially enclosed space" also includes crawl spaces. 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.
(3)
Consideration may be given to the requirements of 34 Pa. Code (Chapters
401 through 405 as amended) and the 2003 International Residential
Code (Sections R323.2.2 and R323.1.4) and the 2003 International Building
Code (Sections 1612.4, 1612.5, 1202.3.2 and 1203.3.3).
D.
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 600 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 at least 1 1/2 feet
above the one-hundred-year 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 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 feet, unless substantiated
data justifying steeper slopes are submitted to and approved by the
Building Permit Officer; and
(5)
Be used to the extent to which it does not adversely affect adjacent
properties. The provisions contained in the 2003 International Building
Code (Sections 1801.1 and 1803.4) shall be utilized.
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 insure proper drainage along streets and provide
drainage away from buildings. The system shall also be designed to
prevent the discharge of excess runoff onto adjacent properties. The
provisions contained in the 2003 International Building Code (Appendix
G401.5) shall be utilized.
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.
(4)
The design and construction provisions of the UCC and 34 Pa. Code
(Chapters 401 through 405, as amended) and contained in the 2003 International
Building Code (Appendix G, Sections 401.3 and 401.4), the 2003 International
Residential Code (Section 323.1.6), the ASCE 24-98 (Section 8.3),
FEMA No. 348, Protecting Building Utilities From Flood Damages, and
the International Private Sewage Disposal Code (Chapter 3) shall be
utilized.
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 § 77-25, 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.
(3)
The design and construction requirements of the UCC pertaining to
this subsection as referred to in 34 Pa. Code (Chapters 401 through
405, as amended) and contained in the 2003 International Building
Code (Sections 1605.2.2, 1605.3.1.2, 1612.4 and Appendix G501.3),
the International Residential Code (Sections R301.1 and R323.1.1)
and ASCE 24-98 (Section 5.6) shall be utilized.
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.
(5)
The provisions of the UCC pertaining to this subsection and referenced
in 34 Pa. Code (Chapters 401 through 405, as amended) and contained
in the 2003 International Building Code (Sections 801.1.3, 1403.2,
1403.4, 1403.6 and 1404.2), the 2003 International Residential Code
(Sections R323.1.7 and R501.3) and ASCE 24-98 (Chapter 6).
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 quality.
(3)
All wooden components (doors, trim, cabinets, etc.) shall be finished
with a marine or water-resistant paint or other finishing material.
(4)
The standards and specification contained in 34 Pa. Code (Chapters
401 through 405, as amended), the 2003 International Building Code
(Sections 801.1.3 and 1403.7 and Appendix G) and the 2003 International
Residential Code (Section R323.1.7).
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.
(3)
The provisions pertaining to the above provisions and referenced in the UCC and 34 Pa. Code (Chapters 401 through 405), as amended, and contained in the 2003 International Building Code (Section 1612.4), the International Residential Code (Section R323.1.5), the 2000 IFGC (Sections R301.5 and R1601.3.8) and ASCE 24 (Chapter 8) shall be utilized.
L.
Equipment.
(1)
Water heaters, furnaces, air-conditioning and ventilating units,
and other electrical, mechanical or utility equipment or apparatus
shall not be located below the Regulatory Flood Evaluation.
(2)
The provisions pertaining to the above provision and referenced in the UCC and 34 Pa. Code (Chapters 401 through 405), as amended, and contained in the 2003 International Building Code (Section 1612.4), the International Residential Code (Section R323.1.5), the 2000 IFGC (Sections R301.5 and R1601.3.8) and ASCE 24 (Chapter 8) shall be utilized.
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.
The standards and specifications contained 34 Pa. Code (Chapters
401 through 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/or supplement
the requirements of this chapter.
A.
In accordance with the Pennsylvania Flood Plain Management Act[1] 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 or 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 is a list of materials
and substances that are considered dangerous to human life:
|
Acetone
| |
|
Ammonia
| |
|
Benzene
| |
|
Calcium carbide
| |
|
Carbon disulfide
| |
|
Celluloid
| |
|
Chlorine
| |
|
Hydrochloric acid
| |
|
Hydrocyanic acid
| |
|
Magnesium
| |
|
Nitric acid and oxides of nitrogen
| |
|
Petroleum products (gasoline, fuel oil, etc.)
| |
|
Phosphorus
| |
|
Potassium
| |
|
Sodium
| |
|
Sulphur and sulphur products
| |
|
Pesticides (including insecticides, fungicides and rodenticides)
| |
|
Radioactive substances, insofar as such substances are not otherwise
regulated
|
[1]
Editor's Note: See 32 P.S. § 679.101 et seq.
B.
Within any FW (Floodway Area), any structure of the kind described in Subsection A above shall be prohibited.
C.
Where permitted within any floodplain area, any new or substantially improved structure of the kind described in Subsection A above shall be elevated or designed and constructed to remain completely dry up to at least 1 1/2 feet above the one-hundred-year flood and designed to prevent pollution from the structure or activity 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 "Flood-Proofing Regulations" (U.S. Army Corps of Engineers, June 1972 as amended March 1992), or with some other equivalent watertight standard.
A.
Within any FW (Floodway Area), manufactured homes shall be prohibited.
B.
Where permitted within any floodplain area, all manufactured homes,
and any improvements thereto, shall be:
C.
Installation of manufactured homes shall be done in accordance with
the manufacturer's installation instructions as provided by the
manufacturer. Where the applicant cannot provide the above information,
the requirements of Appendix E of the 2003 International Residential
Building Code or the U.S. Department of Housing and Urban Development's
Permanent Foundations for Manufactured Housing, 1984 Edition, draft
or latest revision thereto, shall apply and 34 Pa. Code Chapters 401
through 405.
D.
Consideration shall be given to the installation requirements of
the 2003 International Building Code (Appendix G, Section 501.1-3)
and the 2003 International Residential Code (Sections R323.2, R323.3,
R102.71.1 and R105.3.1.1 and Appendix AE101, 604, and 605) or the
most recent revisions thereto and 34 Pa. Code Chapters 401 through
405, as amended, where appropriate and/or applicable to units where
the manufacturer's standards for anchoring cannot be provided
or were not established for the units' proposed installation.
