A.Â
Alteration or relocation of watercourse.
(1)Â
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.
(2)Â
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)Â
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.Â
When an applicant proposes 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), the
applicant shall (as per 44 CFR Part 65.12 as amended from time to
time):
(1)Â
Apply to FEMA for conditional approval of such action prior to Straban
Township permitting the encroachments to occur.
(2)Â
Upon receipt of the FEMA Administrator's conditional approval
of map change and prior to approving the proposed encroachments, Straban
Township 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.
(3)Â
Upon completion of the proposed encroachments, the applicant shall
provide as-built certifications to FEMA with a copy to Straban Township.
FEMA will initiate a final map revision upon receipt of such certifications
in accordance with 44 CFR Part 67.
C.Â
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.Â
Residential structures.
(1)Â
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 (see definition in § 71-29).
(2)Â
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 (see definition in § 71-29) determined in accordance with § 140-36E of this Code.
(3)Â
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)Â
The design and construction standards and specifications contained
in the 2015 International Building Code (IBC) and in the 2015 International
Residential Code (IRC) or the latest edition thereof adopted by the
Commonwealth of Pennsylvania, and ASCE 24 and 34 Pa. Code (Chapters
401-405 as amended) shall be utilized, where they are more restrictive.
B.Â
Nonresidential structures.
(1)Â
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 (see definition in § 71-29), or be designed and constructed so that the space enclosed below the regulatory flood elevation (see definition in § 71-29):
(2)Â
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 (see definition in § 71-29) determined in accordance with § 140-36E of this Code.
(3)Â
In AO Zones, any new construction or substantial improvement shall
have the 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)Â
Any nonresidential structure, or part thereof, made watertight below the regulatory flood elevation (see definition in § 71-29) shall be floodproofed in accordance with the W1 or W2 space classification standards contained in the publication entitled "Flood-Proofing Regulations" published by the U.S. Army Corp 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. There should be a statement submitted with the permit application and a statement submitted with the as-built floodproofing certificate prior to the issuance of the certificate of occupancy under Chapter 140 of this Code.
(5)Â
A nonresidential structure that will be floodproofed must submit the following to the Floodplain Administrator along with the nonresidential floodproofing certificate and prior to the issuance of the certificate of occupancy under Chapter 140 of this Code:
(a)Â
An inspection and maintenance plan detailing the annual maintenance
of floodproofed components ensuring that all components will operate
properly under flood conditions. Components that must be inspected
include, at a minimum:
(b)Â
A flood emergency operation plan detailing the procedures to
be followed during a flooding event and must include information pertaining
to how all components will operate properly under all conditions,
including power failures. The design professional must produce the
plan. An adequate plan must include the following:
[1]Â
An established chain of command and responsibility with leadership
responsibilities clearly defined for all aspects of the plan.
[2]Â
A procedure for notification of necessary parties when flooding
threatens and flood warnings are issued. Personnel required to be
at the building should have a planned and safe means of ingress and
should have no other emergency response duties during a flood event.
Alternates should be assigned in the event that the primary persons
responsible are unable to complete their assigned duties under the
plan.
[3]Â
A list of specific duties assigned to ensure that all responsibilities
are addressed expeditiously. The locations of materials necessary
to properly install all floodproofing components must be included
in the list.
[4]Â
An evacuation plan for all personnel or occupants; those without
duties for the flood emergency as well as those with duties for implementing
the plan. All possible ingress and egress routes must be identified.
[5]Â
A periodic training and exercise program to keep personnel and
occupants aware of their duties and responsibilities. Training drills
should be held at least once a year and should be coordinated with
community officials.
(6)Â
The design and construction standards and specifications contained
in the 2015 International Building Code (IBC) and in the 2015 International
Residential Code (IRC) or the latest revision thereof as adopted by
the Commonwealth of Pennsylvania, and ASCE 24 and 34 Pa. Code (Chapters
401-405 as amended) shall be utilized, where they are more restrictive.
C.Â
Space below the lowest floor.
(1)Â
Fully enclosed spaces below the lowest floor (including basements)
are prohibited.
(2)Â
Partially enclosed spaces 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.
(3)Â
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)Â
A minimum of two openings having a net total area of not less
than one square inch for every square foot of enclosed space installed
on two separate walls.
(b)Â
The bottom of all openings shall be no higher than one foot
above grade.
(c)Â
Openings may be equipped with screens, louvers, or other coverings
or devices, provided that they permit the automatic entry and exit
of floodwaters.
D.Â
Historic structures. Historic structures undergoing repair or rehabilitation
that would constitute a substantial improvement as defined in this
chapter must comply with all ordinance requirements that do not preclude
the structure's continued designation as an historic structure.
Documentation that a specific ordinance 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.Â
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)Â
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)Â
Floor area shall not exceed 200 square feet.
(3)Â
The structure will have a low damage potential.
(4)Â
The structure will be located on the site so as to cause the least
obstruction to the flow of floodwaters.
(5)Â
Power lines, wiring, and outlets will be elevated to the regulatory flood elevation (see definition in § 71-29).
(6)Â
Permanently affixed utility equipment and appliances such as furnaces,
heaters, washers, dryers, etc., are prohibited.
(7)Â
Sanitary facilities are prohibited.
(8)Â
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:
(a)Â
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)Â
The bottom of all openings shall be no higher than one foot
above grade.
(c)Â
Openings may be equipped with screens, louvers, etc., or other
coverings or devices, provided that they permit the automatic entry
and exit of floodwaters.
(9)Â
For accessory structures that are 200 square feet or larger in area (footprint) and that are below the base flood elevation, a variance is required as set forth in Article VII. If a variance is granted, a signed declaration of land restriction (nonconversion agreement) shall be recorded on the property deed prior to issuance of the certificate of occupancy.
(10)Â
The storage of hazardous materials in accessory structures shall
be prohibited.
The following minimum standards shall apply for all construction
and development proposed within any identified floodplain area:
A.Â
Fill. If fill is used, it shall:
(1)Â
Extend laterally at least 15 feet beyond the building line from all
points;
(2)Â
Consist of soil or small rock materials only; sanitary landfills
shall not be permitted;
(3)Â
Be compacted to provide the necessary permeability and resistance
to erosion, scouring, or settling;
(4)Â
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)Â
Be used to the extent to which it does not adversely affect adjacent
properties.
B.Â
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.Â
Water and sanitary sewer facilities and systems.
(1)Â
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)Â
Sanitary sewer facilities and systems shall be designed to prevent
the discharge of untreated sewage into floodwaters.
(3)Â
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)Â
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.Â
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.Â
Streets. The finished elevation of all new streets shall be no more than one foot below the regulatory flood elevation (see definition in § 71-29).
F.Â
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 § 71-21, Development that may endanger human life, shall be stored at or above the regulatory flood elevation (see definition in § 71-29) or floodproofed to the maximum extent possible.
G.Â
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.Â
Anchoring.
(1)Â
All buildings and structures shall be firmly anchored in accordance
with accepted engineering practices to prevent flotation, collapse,
or lateral movement.
I.Â
Floors, walls, and ceilings.
(1)Â
Wood flooring used at or below the regulatory flood elevation (see definition in § 71-29) shall be installed to accommodate a lateral expansion of the flooring perpendicular to the flooring grain without causing structural damage to the building.
(2)Â
Plywood used at or below the regulatory flood elevation (see definition in § 71-29) shall be of a marine or water-resistant variety.
J.Â
Paints and adhesives.
L.Â
Equipment.
M.Â
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.Â
Uniform construction code coordination. The standards and specifications
contained in 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:
(1)Â
International Building Code (IBC) 2015 or the latest revision thereof
as adopted by the Commonwealth of Pennsylvania: Secs. 801, 1202, 1403,
1603, 1605, 1612, 3402, and Appendix G.
(2)Â
International Residential Building Code (IRC) 2015 or the latest
revision thereof as adopted by the Commonwealth of Pennsylvania: Secs.
R104, R105, R109, R322, Appendix E, and Appendix J.
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.
The analyses shall be prepared by a licensed professional engineer
in a format required by FEMA for a conditional letter of map revision
(CLOMR) and letter of map revision (LOMR). Submittal requirements
and processing fees shall be the responsibility of the applicant.