[Ord. 2015-04, 10/13/2015]
1.
Alteration or Relocation of Watercourse.
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's regional office.
B.
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.
C.
In addition, FEMA and the Pennsylvania Department of Community and
Economic Development shall be notified prior to any alteration or
relocation of any watercourse.
2.
Should Manchester Township propose to permit the following encroachments:
any development that causes a rise in the base flood elevations within
the floodway; or any development occurring in Zones A1-30 and Zone
AE without a designated floodway, which will cause a rise of more
than one foot in the base flood elevation; or alteration or relocation
of a stream (including but not limited to installing culverts and
bridges):
A.
The applicant shall (as per 44 CFR Part 65.12) apply to FEMA for
conditional approval of such action prior to permitting the encroachments
to occur.
B.
Upon receipt of the Administrator's conditional approval of
map change and prior to approving the proposed encroachments, a community
shall provide evidence to FEMA of the adoption of floodplain management
ordinances incorporating the increased base flood elevations and/or
revised floodway reflecting the post-project condition.
C.
Upon completion of the proposed encroachments, a community shall
provide as-built certifications. FEMA will initiate a final map revision
upon receipt of such certifications in accordance with 44 CFR Part
67.
3.
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.
4.
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.
[Ord. 2015-04, 10/13/2015]
1.
Within any identified floodplain area, any new construction or substantial
improvements shall be prohibited.
2.
If a variance is obtained for new construction or substantial improvements
in the identified floodplain area in accordance with the criteria
in Part 9, then the following provisions apply:
A.
Residential Structures.
(1)
In AE, A1-30, and AH Zones, any new construction or substantial
improvement shall have the lowest floor (including basement) elevated
up to, or above, the regulatory flood elevation.
(2)
In A Zones, where there are no base flood elevations specified on the FIRM, any new construction or substantial improvement shall have the lowest floor (including basement) elevated up to, or above, the regulatory flood elevation determined in accordance with § 8-502, Subsection 1C, of this chapter.
(3)
In AO Zones, any new construction or substantial improvement
shall have the lowest floor (including basement) at or above the highest
adjacent grade at least as high as the depth number specified on the
FIRM.
(4)
The design and construction standards and specifications contained
in the 2009 International Building Code (IBC) and in the 2009 International
Residential Code (IRC), or the most-recent revisions thereof, and
ASCE 24 and 34 Pa. Code (Chapters 401-405, as amended) shall be utilized,
where they are more restrictive.
B.
Nonresidential Structures.
(1)
In AE, A1-30 and AH Zones, 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
below the regulatory flood elevation:
(2)
In A Zones, where no base flood elevations are specified on the FIRM, any new construction or substantial improvement shall have the lowest floor (including basement) elevated or completely floodproofed up to, or above, the regulatory flood elevation determined in accordance with § 8-502, Subsection 1C, of this chapter.
(3)
In AO Zones, any new construction or substantial improvement
shall have its lowest floor elevated or completely floodproofed above
the highest adjacent grade to at least as high as the depth number
specified on the FIRM.
(4)
Any nonresidential structure, or part thereof, made watertight
below the regulatory flood elevation shall be floodproofed in accordance
with the W1 or W2 space classification standards contained in the
publication entitled "Flood-Proofing Regulations" published by the
United States 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.
(5)
The design and construction standards and specifications contained
in the 2009 International Building Code (IBC) and in the 2009 International
Residential Code (IRC), or the most-recent revisions thereof, and
ASCE 24 and 34 Pa. Code (Chapters 401-405, as amended) shall be utilized,
where they are more restrictive.
C.
Space Below the Lowest Floor.
(1)
Fully enclosed space below the lowest floor (including basements)
is prohibited.
(2)
Partially enclosed space below the lowest floor (including basements)
is prohibited.
(3)
If a variance is obtained for any fully or partially enclosed
space below the lowest floor in the identified floodplain area in
accordance with the criteria in Part 9, then the following provisions
apply:
(a)
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 having 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, or other coverings
or devices, provided that they permit the automatic entry and exit
of floodwaters.
D.
Historic Structures. Historic structures undergoing repair or rehabilitation
that would constitute a substantial improvement, as defined in this
chapter, must comply with all chapter requirements that do not preclude
the structure's continued designation as an historic structure.
Documentation that a specific chapter requirement will cause removal
of the structure from the National Register of Historic Places or
the State Inventory of Historic Places must be obtained from the Secretary
of the Interior or the State Historic Preservation Officer. Any exemption
from chapter requirements will be the minimum necessary to preserve
the historic character and design of the structure.
E.
Accessory Structures.
(1)
Structures accessory to a principal building are prohibited
in any identified floodplain area.
(2)
If a variance is obtained for new construction or substantial
improvements of any accessory structure in the identified floodplain
area in accordance with the criteria in Part 9, then the following
provisions apply:
(a)
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.
(b)
Floor area shall not exceed 200 square feet.
(c)
The structure will have a low damage potential.
(d)
The structure will be located on the site so as to cause the
least obstruction to the flow of floodwaters.
(e)
Power lines, wiring, and outlets will be elevated to the regulatory
flood elevation.
(f)
Permanently affixed utility equipment and appliances, such as
furnaces, heaters, washers, dryers, etc., are prohibited.
(g)
Sanitary facilities are prohibited.
(h)
The structure shall be adequately anchored to prevent flotation,
collapse, and lateral 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:
[1]
A minimum of two openings having 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.
[Ord. 2015-04, 10/13/2015]
1.
The following minimum standards shall apply for all construction
and development proposed within any identified floodplain area:
A.
Fill.
(1)
Within any identified floodplain area, the use of fill shall
be prohibited. If a variance is obtained in accordance with the criteria
in Part 9, then the following provisions apply:
(a)
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 floodplain administrator; and
[5]
Be used to the extent to which it does not adversely affect
adjacent properties.
B.
Drainage Facilities.
(1)
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.
(2)
The provisions contained in the 2003 IBC (Appendix G401.5),
or latest revision, as amended, shall be utilized.
C.
Water and Sanitary Sewer Facilities and Systems.
(1)
All new or replacement water supply 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 waste disposal 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 FEMA No.
348, "Protecting Building Utilities From Flood Damages," and "the
International Private Sewage Disposal Code" 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 § 8-604, Development Which May Endanger Human Life, shall be stored at or above the regulatory flood elevation 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.
The design and construction requirements of the UCC pertaining to
this subsection as referred to in 34 Pa. Code (Chapters 401-405, as
amended) and contained in the 2003 IBC (§§ 1605.2.2,
1605.3.1.2, 1612.4 and Appendix G501.3), or latest adopted revision,
the IRC (§§ R301.1 and R323.1.1), or latest adopted
revision, and ASCE 24-98 (§ 5.6), latest adopted revision,
shall be utilized.
J.
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 401-405, as amended) and contained in the 2003 IBC (§§ 801.1.3, 1403.2, 1403.4, 1403.6 and 1404.2, as amended), the 2003 IRC (§§ R323.1.7 and R501.3), or latest adopted revision, as amended, and ASCE 24-98 (Chapter 6), current addition or latest adopted revision.
K.
Paints and Adhesives.
(1)
Paints and 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 variety.
(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.
(4)
The standards and specifications contained in 34 Pa. Code (Chapters
401-405, as amended), the 2003 IBC, or latest revision (§§ 801.1.3,
1403.7 and Appendix G), and the 2003 IRC (§ R323.1.7), or
latest revision.
L.
Electrical Components.
(1)
Electrical distribution panels shall be at least three feet
above the base 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 401-405, as amended), and contained in the 2003 IBC (§ 1612.4), or latest adopted revision, the IRC (§ R323.1.5), or latest adopted revision, the 2000 IFGC (§§ R301.5 and R1601.3.8), or latest adopted revision, and ASCE 24 (Chapter 8) shall be utilized.
M.
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 elevation.
N.
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.
O.
Uniform Construction Code Coordination.
(1)
The standards and specifications contained 34 Pa. Code (Chapters
401-405), 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.
[Ord. 2015-04, 10/13/2015]
1.
Within any identified floodplain area, any structure of the kind described in Subsection 2 below shall be prohibited.
2.
If a variance is obtained in accordance with the criteria in Part 9, then the following provisions apply (§ 8-604, Subsection 2B, C and D):
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 2A above shall be prohibited within the area measured 50 feet landward from the top-of-bank of any watercourse.
C.
Within any Floodway Area, any structure of the kind described in Subsection 2A above shall be prohibited. Where permitted within any identified floodplain area, any new or substantially improved residential structure of the kind described in § 8-604, Subsection 2A, above shall be elevated to remain completely dry up to at least 1 1/2 feet above the base flood elevation and built in accordance with §§ 8-601, 8-602 and 8-603.
D.
Any such nonresidential 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" (United
States Army Corps of Engineers, June 1972, as amended March 1992),
or with some other equivalent watertight standard.
[Ord. 2015-04, 10/13/2015]
1.
All subdivision proposals and development proposals containing at
least 50 lots or at least five acres, whichever is the lesser, in
identified floodplain 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.
A.
The analyses shall be prepared by a licensed professional engineer
in a format required by FEMA for a conditional letter of map revision
and letter of map revision.
2.
Submittal requirements and processing fees shall be the responsibility
of the applicant.
[Ord. 2015-04, 10/13/2015]
1.
Within any identified floodplain area, manufactured homes shall be
prohibited.
2.
If a variance is obtained in accordance with the criteria in Part
9, then the following provisions apply:
A.
Within any identified floodplain area, manufactured homes shall be
prohibited within the area measured 50 feet landward from the top-of-bank
of any watercourse.
B.
Where permitted within any identified floodplain area, all manufactured
homes, and any improvements thereto, shall:
(1)
Be placed on a permanent foundation;
(2)
Be elevated so that the lowest floor of the manufactured home
is at least 1 1/2 feet above base flood elevation;
(3)
Be anchored to resist flotation, collapse, or lateral movement;
(4)
Have all ductwork and utilities, including HVAC/heat pump, elevated
to the regulatory flood elevation.
(5)
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 2009 "International
Residential Building Code" or the "United States Department of Housing
and Urban Development's Permanent Foundations for Manufactured
Housing," 1984 Edition, draft or latest revision thereto, and 34 Pa.
Code, Chapter 401-405, shall apply.
(6)
Consideration shall be given to the installation requirements
of the 2009 IBC, and the 2009 IRC, or the most-recent revisions thereto,
and 34 Pa. Code, 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 proposed unit's(s')
installation.
