A.
No encroachment, alteration or improvement of any
kind shall be made to any watercourse until all required permits or
approvals have been first obtained from the Department of Environmental
Protection, Bureau of Dams and Waterway Management. In addition, the
Federal Emergency Management Agency and Pennsylvania Department of
Community and Economic Development, Bureau of Community Planning,
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 Part 2
and any other applicable codes, ordinances and regulations.
A.
Within any floodway district, the following provisions
shall apply:
(1)
Any new construction, development, use, activity or
encroachment that would cause any increase in flood heights shall
be prohibited.
(2)
No new construction or development shall be allowed
unless a permit is obtained from the Department of Environmental Protection,
Bureau of Dams and Waterway Management.
A.
Residential structures. Within any identified floodplain
area, the lowest floor, including the basement, of any new residential
structure or any substantial improvement to an existing residential
structure shall be at least 1 1/2 feet above the one-hundred-year-flood
elevation. Fully enclosed spaces below the lowest floor shall be prohibited.
B.
Nonresidential structures.
(1)
Within any identified floodplain area, the lowest
floor, including the basement, of any new nonresidential structure
or any suhstantial improvement to an existing nonresidential structure
shall be at least 1 1/2 feet above the one-hundred-year-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. Fully enclosed spaces below the
lowest floor shall be prohibited.
(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 United States Army Corps of Engineers (June 1972)
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.
The following minimum land development/subdivision
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 Township Engineer.
(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 the
street 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
and 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.
The following minimum Building Code[1] standards shall apply for all construction and development
proposed within any identified floodplain area.
A.
Storage. All materials that are buoyant, flammable,
explosive or, in times of flooding, could be injurious to human, animal
or plant life shall be stored at or above regulatory flood elevation
and/or floodproofed to the maximum extent possible.
B.
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.
C.
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 elevations
shall be securely anchored or affixed to prevent flotation.
D.
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.
E.
Paints and adhesives.
(1)
Paints or 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 a 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.
G.
Equipment. 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.
H.
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.
A.
Where permitted within any floodplain area, all manufactured
homes and any additions thereto shall be:
